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Ambac Financial Group

ambc · NASDAQ Financial Services
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Ticker ambc
Exchange NASDAQ
Sector Financial Services
Industry Insurance - Specialty
Employees 201-500
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FY2017 Annual Report · Ambac Financial Group
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AMBAC FINANCIAL GROUP, INC.
2017 ANNUAL REPORT

ABOUT AMBAC

Ambac Financial Group, Inc. (“Ambac” or “AFG”), headquartered 
in New York City, is a holding company whose subsidiaries, 
including its principal operating subsidiaries, Ambac Assurance 
Corporation (“AAC”), Everspan Financial Guarantee Corp. and 
Ambac Assurance UK Limited (“Ambac UK”), provide financial 
guarantees of obligations in both the public and private sectors 
globally. AAC is a guarantor of public finance and structured 
finance obligations. Ambac’s common stock trades on the 
NASDAQ Global Select Market under the symbol “AMBC”. The 
Amended and Restated Certificate of Incorporation of Ambac 
contains substantial restrictions on the ability to transfer 
Ambac’s common stock. Subject to limited exceptions, any 
attempted transfer of common stock shall be prohibited and 
void to the extent that, as a result of such transfer (or any 
series of transfers of which such transfer is a part), any person 
or group of persons shall become a holder of 5% or more of 
Ambac’s common stock or a holder of 5% or more of Ambac’s 
common stock increases its ownership interest. Ambac is 
committed to providing timely and accurate information to 
the investing public, consistent with our legal and regulatory 
obligations. To that end, we use our website to convey 
information about our businesses, including the anticipated 
release of quarterly financial results, quarterly financial, 
statistical and business-related information, and the posting of 
updates to the status of certain residential mortgage backed 
securities litigations. For more information, please go to  
www.ambac.com.

Forward-Looking Statements  In this Annual Report, we have included statements that may constitute “forward-
looking statements” within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act 
of 1995. Words such as “estimate,” “project,” “plan,” “believe,” “anticipate,” “intend,” “plan,” “potential” and similar 
expressions, or future or conditional verbs such as “will,” “should,” “would,” “could,” and “may,” or the negative of 
those expressions or verbs, identify forward-looking statements. We caution readers that these statements are 
not guarantees of future performance. Forward-looking statements are not historical facts but instead represent 
only our beliefs regarding future events, which, may by their nature be inherently uncertain and some of which 
may be outside our control. These statements may relate to plans and objectives with respect to the future, among 
other things which may change. We are alerting you to the possibility that our actual results may differ, possibly 
materially, from the expected objectives or anticipated results that may be suggested, expressed or implied by 
these forward-looking statements. Important factors that could cause our results to differ, possibly materially, from 
those indicated in the forward-looking statements include, among others, those discussed under “Risk Factors” in 
our most recently filed quarterly or annual report with the SEC.

DEAR FELLOW SHAREHOLDERS

“Our 2017 accomplishments  
reflect our focus and commitment  
to delivering long-term  
shareholder value.” 

CLAUDE LeBLANC  
President and Chief Executive Officer

In January of 2017, we outlined our plans to build upon 
Ambac’s strong foundation and position the company  
for future growth. Throughout 2017, we executed on  
these plans and successfully accomplished several key 
financial, operational and regulatory objectives. 
  As part of these accomplishments, during the year  
we laid the ground work for the successful execution  
of a transformational restructuring transaction. As a  
result of our efforts in 2017 we were able to conclude  
the rehabilitation of AAC’s Segregated Account in 
February 2018.  

In addition, for the first time since 2008, Ambac 

Financial Group’s 2017 audited financial statements were 
filed without the expression of substantial doubt about 
the company’s ability to continue as a going concern.  
This is a strong indication of Ambac’s materially 
improved financial health and further demonstrates 
our commitment towards positioning the company for 
future growth. As we move forward in 2018 we remain 
focused on our targeted strategic priorities, including 
successful risk management and implementing growth 
strategies that will drive sustainable long-term value for 
our shareholders.

MILESTONE RESTRUCTURING 
TRANSACTION BENEFITS

n	 		Creation	of	material	value	for		

our	shareholders

	 •		Estimated increase to Pro forma 

December 31, 2017 Book Value of 
approximately $7.56 per share or a  
25% increase over year-end reported 
Book Value

n	 	Greater	financial	and	strategic	flexibility	

n	 	A	financially	stronger	AAC,	making		

full	payment	on	all	future	policy	claims	

n	 			Material	reduction	in	ongoing		

rehabilitation	and	restructuring	costs		
and	other	related	expenses		

1

 
 
Book Value/Share 

Adjusted Book Value/Share (1) 

4 9 %   C A G R  ( 4 )

$37.41

$37.94

$38.08

$31.09

$30.52

$40

$35

$30

$25

$20

$15

$10

$5

$0

$15.62

$6.38

June
2013

Dec
2013

Dec
2014

Dec
2015

Dec
2016

Dec
2017

Pro forma(5)
2017

+ $ 2 8 . 1 3

$28.15

$29.48

$24.34

$31.90

$15.01

$8.32

$3.77

June
2013

Dec
2013

Dec
2014

Dec
2015

Dec
2016

Dec
2017

Pro forma(5)
2017

40
$35
35
$30
30
$25
25
$20
20
$15
15
$10
10
$5
5
0
$0

35

30

25

20

15

10

5

0

KEY 2017 PERFORMANCE HIGHLIGHTS:

•  Milestone achievement of the successful exit  

from rehabilitation of AAC’s Segregated Account

•  Decreased our insured portfolio(2) by 21%, from  

$79.3 billion to $62.7 billion, and decreased ACCs  
by 17% from $17.0 billion to $14.1 billion  

•  Opportunistically purchased $815.2 million of  
Ambac-insured securities; we currently own  
58% of AAC’s insured COFINA bonds and  
29% of AAC-insured PRIFA bonds

•  Reorganized operations and reduced costs- 

significant headcount reductions and future annual 
compensation savings of approximately 20% 

•  Strengthened public finance loss reserves,  
resulting in a net loss of $(328.7) million,  
or $(7.25) per diluted share, and an Adjusted  
Loss (1) of $(165.1) million, or $(3.64) per  
diluted share 

•  Ended 2017 with total AFG stockholders’  

equity (“book value“) of $1.4 billion, or $30.52  
per share, Adjusted Book Value (1) of $1.1 billion, or 
$24.34 per share, Pro forma Book Value(5) of $1.7 
billion or $38.08 per share and Pro forma Adjusted 
Book Value(5) of $1.4 billion or $31.90 per share

•  Accrued $30.5 million of tolling payments  

resulting from the utilization of Net Operating  
Losses (“NOLs”) at AAC, which will be paid to  
AFG in May 2018, bringing AFG’s assets to  
over $400 million 

2

  Ambac’s key business activities are focused on  
risk management and stabilizing our insurance platform. 
During the year we took significant steps to deliver on 
this goal, reorganizing our Risk Group to sharpen and 
expand our focus on risk remediation activities. Our  
focus is not only on our Adversely Classified Credits 
(“ACCs”) but also Watch List Credits. Watch List  
Credits represent exposures for which there may be 
heightened potential for future adverse development 
based on qualitative and quantitative stress assumptions. 
We will target ACCs and Watch List Credits in our efforts 
to improve the overall quality of AAC’s insured portfolio 
and balance sheet. We believe that a focus on the long-
term stability of our balance sheet and quality of our 
book value is key to achieving our goal of delivering  
long-term shareholder value.
  Consistent with our strategic focus, during 2017  
we successfully decreased our ACCs by 17% from $17.0 
billion to $14.1 billion including through several targeted 
de-risking initiatives. 
  Our actions drove the improvement of our overall  
risk profile by decreasing our insured portfolio from  
$79.3 billion to $62.7 billion, or 21%.
  Notwithstanding our many achievements during  
the year, Ambac and the financial guaranty sector  
as a whole experienced increased uncertainty from 
exposure to Puerto Rico, leading to downward pressure 
on share prices. 

 
 
 
 
 
 
 
 
 
 
believe much work remains to be done. The fundamental 
requirements of and Congressional intent behind the 
PROMESA law are the stabilization of Puerto Rico’s 
financial and economic profile, institutionalization of fiscal 
responsibility, and restoration of capital market access. 
However, none of these objectives can be achieved 
without increased transparency and accountability from 
the Commonwealth and Oversight Board, respect for 
lawful priorities and liens, and effective comprehensive 
fiscal reform with a focus on economic growth. 
Furthermore, the Commonwealth and Oversight Board 
will need to make material changes to their approach  
with creditors to avoid long and protracted litigation 
which will come at the expense of the residents of  
Puerto Rico and U.S. tax payers. 

In 2018, we hope to see increased clarity around the 
issues surrounding Puerto Rico. Ambac will continue to 
actively pursue dialogue with local and federal officials 
and progress all aspects of our strategy with respect to 
mitigating losses on our Puerto Rico exposure.

Insured Portfolio (2)

SELECT DE-RISKING 
ACTIVITIES

n	 	Commuted	certain	interest	rate	swaps	
between	Augusta	Funding	Limited		
IV	and	Ambac	Financial	Services		
resulting	in	a	gain	of	$43.4	million		
and	approximately	$2.6	million	in	
accelerated	premiums

n	 	Facilitated	an	international	asset-backed	

issuer’s	refinancing	of	£188.1	million	
of	Ambac-insured	debt,	resulting	in	
accelerated	premiums	to	Ambac	UK		
of	$11.2	million

n	 	Terminated	20	RMBS	transactions,		

resulting	in	the	reduction	of	adversely	
classified	net	par	exposure	by		
$422.5	million

n	 	Realized	a	benefit	of	$91.6	million		

as	a	result	of	the	settlement	between	
Ballantyne	and	JPMorgan	Investment	
Management,	Inc.	

n	 	Commuted/refinanced	approximately	
$220.1	million	of	net	par	exposure		
related	to	several	other	distressed	
exposures	

  While our exposure to Puerto Rico remains one of 
our biggest challenges, we believe that we are better 
positioned to manage our risk based on actions we have 
taken. During the year, we increased our public finance 
reserves largely as a result of developments related to 
Puerto Rico, including Hurricane Maria. We are pleased 
the Bipartisan Budget Act of 2018 provides for billions 
in additional federal recovery aid to Puerto Rico and 
requires the Governor of Puerto Rico to develop a 12- 
and 24-month economic and disaster recovery plan with 
periodic progress reports to Congress. However, we 

$62.7 BILLION NET PAR

  Reducing operating expenses was also a key priority 
for us and in 2017 we took significant steps to implement 
a corporate-wide reorganization to improve operational 
effectiveness and reduce expenses. These actions 
reduced headcount by 19%, which will result in future 
annual compensation costs savings of approximately  

3

InternationalPublic Finance51%27%Structured Finance22% 
Insured Portfolio Net Par (2) 
($ in billions)

Adversely Classified Credits Net Par (2),(3) 
($ in billions)

$250

$200

$150

$100

$50

$0

# of Credits

6,000

Reduced by 21% 
in 2017

4,000

2,000

0

June
2013

Dec
2013

Dec
2014

Dec
2015

Dec
2016

Dec
2017

PF

SF

Int’l

# of Credits

$35
250
$30
200
$25

150
$20

$15
100
$10
50
$5

$0
0

6000

4000

Reduced by 17% 
in 2017

June
2013

Dec
2013

Dec
2014

Dec
2015

Dec
2016

Dec
2017

IA

II

III

IV

35

30

25

20

15

10

5

0

20% or $8.5 million. These initiatives were focused on 
reducing expenses and taking other meaningful steps  
to reorganize our operations and create a more 
effectively-run platform. We also expect to see additional 
material reductions in run-rate expenses relating to 
regulatory and restructuring costs following the exit  
from rehabilitation of AAC’s Segregated Account.  
We will continue to pursue additional cost cutting 
measures as we progress our portfolio runoff. 
  On the loss recovery side, we continued to progress 
the prosecution of our RMBS-related litigation which 
remains a key value-driver for our company and our 
shareholders. We are confident in the strength of our 
claims and will continue to pursue our cases through  
trial if necessary.

Lastly, during 2017, management and the Board 
completed a review of our long-term strategy. While  
this strategy remained largely intact, we have updated 
our strategic priorities based on our achievements and 
future business plans. 
  As we consider potential new businesses we will  
focus on opportunities that (i) are adjacent to our core 
business, (ii) create additional long-term value with 
attractive risk-adjusted returns (under certain acceptable 
financial criteria) and (iii) are well positioned to create 
value through synergies and utilization of Ambac’s net  
operating loss carry-forwards.
  AFG is expecting to receive an NOL tolling payment 
from AAC for the third consecutive year under the terms 

4

0

2000

of the intercompany Tax Sharing Agreement. The 2018 
payment will be $30.5 million. Since Ambac’s emergence 
from bankruptcy in 2013 the NOLs have preserved 
approximately $691 million of value for shareholders and 
have facilitated approximately $130.6 million of value 
through paid and accrued tolling payments to AFG.
  During the year, we remained proactively engaged 
with our shareholders and in response to your feedback 
continued to refine our compensation metrics to further 
align them with the interests of our shareholders. A 
revised compensation structure that is metrics driven was 
implemented in 2017, determined by a mix of qualitative 
and quantitative criteria as well as equity ownership 
requirements for executives. We also made changes to 
our non-employee director base compensation plan. 
Starting in 2017 non-employee director cash retainer 
and stock-based compensation, in the aggregate, 
was reduced by 33% compared to 2016 with a higher 
percentage of equity compared to cash compensation.

The exit from rehabilitation of the Segregated Account 

also resulted in a simplified governance structure with 
the removal of the requirement to have unaffiliated 
directors on the AAC Board. In evaluating our needs 
and Board composition post exit from rehabilitation we 
considered the Board’s skill set and experience as well 
as our diversity objectives. On March 1st we announced 
the appointment of Ms. Joan Lamm-Tennant as a new 
director at both the AFG and AAC Boards. Joan’s 
extensive experience in the insurance industry and her 

 
 
STRATEGIC PRIORITIES 

n	 	Active	runoff	of	AAC	and	its		

subsidiaries	through	transaction	
terminations,	policy	commutations,	
settlements	and	restructurings,		
with	a	focus	on	our	watch	list	and	
adversely	classified	credits,	that		
we	believe	will	improve	our	risk	profile,		
and	maximizing	the	risk-adjusted		
return	on	invested	assets

n	 	Ongoing	rationalization	of	Ambac’s		

and	its	subsidiaries’	capital	and		
liability	structures

n	 	Loss	recovery	through	active		

litigation	management	and	exercise		
of	contractual	and	legal	rights

n	 	Ongoing	review	of	organizational		
effectiveness	and	efficiency	of	the		
operating	platform

n	 	Evaluation	of	opportunities	in	certain		

business	sectors	that	meet	acceptable		
criteria	and	will	generate	long-term	
stockholder	value	with	attractive		
risk-adjusted	returns

entrepreneurial drive promise to serve us well as we move 
forward post exit from rehabilitation. We are pleased to 
welcome Ms. Lamm-Tennant to our Board. 

  Following the execution of our transformational 

restructuring transaction we are excited about the  
future and believe we are well positioned to explore  
and advance the opportunities available to us within our 
new operating paradigm. 
  We would like to thank our employees for their 
ongoing commitment, support and dedication, which 
is instrumental in helping us achieve our stated goals. 
Looking ahead to 2018, we will remain focused on 
advancing our strategic priorities to improve our risk 
profile and quality of our book value in order to maximize 
returns for shareholders. We remain steadfast in our 
commitment to our shareholders and we will look to build 
upon our momentum in 2018 with the goal to continue to 
deliver long-term shareholder value. 

Claude LeBlanc
President and 
Chief Executive Officer

(1) Ambac reports two non-GAAP financial measures: Adjusted Earnings (Loss) and Adjusted Book Value. The most directly comparable GAAP measures are net income attributable to common stockholders for Adjusted Earnings (Loss) and Total Ambac Financial Group, Inc. stockholders’ equity for Adjusted 
Book value. A non-GAAP financial measure is a numerical measure of financial performance or financial position that excludes (or includes) amounts that are included in (or excluded from) the most directly comparable measure calculated and presented in accordance with GAAP. We are presenting these 
non-GAAP financial measures because they provide greater transparency and enhanced visibility into the underlying drivers of our business. Adjusted Earnings (Loss) and Adjusted Book Value are not substitutes for the Company’s GAAP reporting, should not be viewed in isolation and may differ from 
similar reporting provided by other companies, which may define non-GAAP measures differently. Each of the reconciling items is presented in Appendix A to this Annual Report. 
(2) Par throughout this Annual Report includes capital appreciation bonds (“CABs”) which are reported at the par amount at the time of issuance of the insurance policy as opposed to the current accreted value of the bonds. 
(3) Adversely Classified Credits: Class IA - Potential Problem with Risks to be Dimensioned; Class II - Substandard Requiring Intervention; Class III  Doubtful with Clear Potential for Loss; Class IV – Imminent Default or Defaulted. See Ambac’s 2017 Form 10-K for further description of risk classifications. 
(4) Compound Annual Growth Rate (“CAGR”).
(5) Pro forma information reflects unaudited adjustments attributable to the Rehabilitation Exit Transactions and Tier 2 Notes Issuance. See page 70 of this Annual Report for reconciliation.

5

 
BOARD OF DIRECTORS

EXECUTIVE OFFICERS

Claude LeBlanc 
President and  
Chief Executive Officer

David Trick  
Executive Vice President, 
Chief Financial Officer  
and Treasurer

David Barranco   
Senior Managing Director, 
Head of Risk Management  
and Corporate Development

Robert B. Eisman 
Senior Managing Director, 
Chief Accounting Officer 
and Controller

Stephen M. Ksenak   
Senior Managing Director 
and General Counsel

Michael Reilly   
Senior Managing Director, 
Chief Information Officer and  
Chief Administrative Officer

R. Sharon Smith   
Senior Managing Director 
and Chief of Staff

Jeffrey S. Stein (3)
Founder and Managing Partner  
of Stein Advisors LLC
Chairman since 2015  
Director since 2013

Alexander D. Greene(2),	(3)*,	(4)
Former Managing Partner and  
Head of U.S. Private Equity at 
Brookfield Asset Management
Director since 2015

Ian D. Haft (1),	(2),	(4)*
Founding Partner at  
Cornwall Capital Management LP
Director since 2016

David L. Herzog (1)*,	(4)
Former Chief Financial Officer of AIG
Director since 2016

C. James Prieur (1),	(2)*,	(3)
Former Chief Executive Officer 
of CNO Financial Group, Inc.
Director since 2016

Claude LeBlanc
President and  
Chief Executive Officer
Director since 2017

Joan Lamm-Tennant (1),	(4) 
Founder and  
Chief Executive Officer of  
Blue Marble Microinsurance
Director since 2018

(1)  Member of Audit Committee
(2)  Member of Compensation Committee
(3)  Member of Governance and Nominating Committee
(4)  Member of Strategy and Risk Policy Committee

*Chair of Committee

6

 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Fiscal Year Ended December 31, 2017

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from        to        
Commission File Number: 1-10777

Ambac Financial Group, Inc.

(Exact name of Registrant as specified in its charter)

Delaware

(State of incorporation)

One State Street Plaza, New York, New York
(Address of principal executive offices)

13-3621676

(I.R.S. employer identification no.)
10004
(Zip code)

212-658-7470

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act: None
Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.   Yes  

   No  

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.  Yes  

   No  

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 

during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing 
requirements for the past 90 days.  Yes  

   No  

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to 

be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the 
registrant was required to submit and post such files).  Yes  

   No  

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the 
best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III in this Form 10-K or any amendment to this 
Form 10-K.  

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an 

emerging growth company.  See definition of “large accelerated filer”, “accelerated filer”, “smaller reporting company”and"emerging growth company" in Rule 
12b-2 of the Exchange Act): (Check one):

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company

Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or 

revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes 

  No 

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13, or 15(d) of the Securities Exchange 

Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.   Yes  

  No  

The aggregate market value of voting stock held by non-affiliates of the Registrant as of the close of business on June 30, 2017 was $785,107,730. As of 

February 27, 2018, there were 45,278,480 shares of Common Stock, par value $0.01 per share, were outstanding. 

Portions of the Registrant’s proxy statement for its 2018 annual meeting of stockholders are incorporated by reference in this Form 10-K in response to Part 

III Items 10, 11, 12, 13, and 14.

Documents Incorporated By Reference

  
[ THIS PAGE INTENTIONALLY LEFT BLANK ]

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

TABLE OF CONTENTS

Cautionary Statement Pursuant to the Private Securities Litigation Reform Act of 1995

PART I

Item 1.

Business..........................................................................................................................................................................
Introduction ...............................................................................................................................................................
Risk Management Group ..........................................................................................................................................
Insurance Regulatory Matters and Other Restrictions ..............................................................................................
Investments and Investment Policy...........................................................................................................................
Employees.................................................................................................................................................................
Item 1A. Risk Factors....................................................................................................................................................................
Item 1B. Unresolved Staff Comments ..........................................................................................................................................
Properties........................................................................................................................................................................
Item 2.
Item 3.
Legal Proceedings ..........................................................................................................................................................
Item 4. Mine Safety Disclosures .................................................................................................................................................

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities ....
Item 6.
Selected Financial Data ..................................................................................................................................................
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations .........................................
Company Overview ..................................................................................................................................................
Executive Summary ..................................................................................................................................................
Critical Accounting Policies and Estimates ..............................................................................................................
Financial Guarantees in Force...................................................................................................................................
Results of Operations ................................................................................................................................................
Liquidity and Capital Resources ...............................................................................................................................
Balance Sheet............................................................................................................................................................
Special Purpose Entities Including Variable Interest Entities ...................................................................................
Accounting Standards ...............................................................................................................................................
Ambac Assurance Statutory Basis Financial Results................................................................................................
Ambac Assurance UK Limited Financial Results Under UK Accounting Principles ..............................................
Non-GAAP Financial Measures ...............................................................................................................................
Pro Forma Balance Sheet and Proforma Adjusted Book Value ................................................................................
Item 7A. Quantitative and Qualitative Disclosures About Market Risk .......................................................................................
Financial Statements and Supplementary Data ..............................................................................................................
Item 8.
Item 9.
Changes in and Disagreements With Accountants on Accounting and Financial Disclosure ........................................
Item 9A. Controls and Procedures .................................................................................................................................................
Item 9B. Other Information ...........................................................................................................................................................

PART III

Item 10. Directors, Executive Officers and Corporate Governance .............................................................................................
Executive Compensation ................................................................................................................................................
Item 11.
Item 12.
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ......................
Item 13. Certain Relationships and Related Transactions, and Director Independence ...............................................................
Principal Accountant Fees and Services .........................................................................................................................
Item 14.

PART IV

Item 15.

Exhibits, Financial Statement Schedules ........................................................................................................................
Schedule I—Summary of Investments Other Than Investments in Related Parties .................................................
Schedule II—Condensed Financial Information of Registrant (Parent Company Only) .........................................
Schedule IV—Reinsurance .......................................................................................................................................

1

2
2
5
8
9
10
10
26
26
26
26

26
28
29
29
29
31
37
50
56
59
64
64
65
66
67
70
71
74
157
157
157

157
157
158
158
158

158
163
164
169

SIGNATURES......................................................................................................................................................................................

170

[ THIS PAGE INTENTIONALLY LEFT BLANK ]

CAUTIONARY  STATEMENT  PURSUANT  TO  THE 
PRIVATE SECURITIES LITIGATION REFORM ACT OF 
1995 

In  this Annual  Report,  we  have  included  statements    that  may 
constitute “forward-looking statements” within the meaning of the 
safe harbor provisions of the Private Securities Litigation Reform 
Act  of  1995.  Words  such  as  “estimate,”  “project,”  “plan,” 
“believe,”  “anticipate,”  “intend,”  “planned,”  “potential”  and 
similar expressions, or future or conditional verbs such as “will,” 
“should,” “would,” “could,” and “may,” or the negative of those 
expressions  or  verbs,  identify  forward-looking  statements.  We 
caution readers that these statements are not guarantees of future 
performance. Forward-looking statements are not historical facts 
but  instead  represent  only  our  beliefs  regarding  future  events, 
which may by their nature be inherently uncertain and some of 
which may be outside our control. These statements may relate to 
plans and objectives with respect to the future, among other things 
which may change. We are alerting you to the possibility that our 
actual results may differ, possibly materially, from the expected 
objectives or anticipated results that may be suggested, expressed 
or implied by these forward-looking statements. Important factors 
that could cause our results to differ, possibly materially, from those 
indicated in the forward-looking statements include, among others, 
those  discussed  under  “Risk  Factors”  in  Part  I,  Item 1A  of  this 
Annual Report on Form 10-K. 

Any or all of management’s forward-looking statements here or in 
other publications may turn out to be incorrect and are based on 
management’s current belief or opinions.  Ambac’s actual results 
may  vary  materially,  and  there  are  no  guarantees  about  the 
performance  of  Ambac’s  securities.    Among  events,  risks, 
uncertainties  or  factors  that  could  cause  actual  results  to  differ 
materially  are:  (1)  the  highly  speculative  nature  of  Ambac’s 
common  stock  and  volatility  in  the  price  of Ambac’s  common 
stock; (2) uncertainty concerning the Company’s ability to achieve 
value for holders of its securities, whether from Ambac Assurance 
Corporation  ("Ambac  Assurance)  or  from  transactions  or 
opportunities apart from Ambac Assurance; (3) adverse effects on 
Ambac’s  share  price  resulting  from  future  offerings  of  debt  or 
equity securities that rank senior to Ambac’s common stock; (4) 
potential of rehabilitation proceedings against Ambac Assurance; 
(5)  dilution  of  current  shareholder  value  or  adverse  effects  on 
Ambac’s  share  price  resulting  from  the  issuance  of  additional 
shares of common stock; (6) inadequacy of reserves established 
for losses and loss expenses and possibility that changes in loss 
reserves may result in further volatility of earnings or financial 
results;  (7)  decisions  made  by  Ambac  Assurance's  primary 
insurance regulator for the benefit of policyholders that may result 
in material adverse consequences for holders of the Company’s 
securities  or  holders  of  securities  issued  or  insured  by Ambac 
Assurance;  (8)  increased  fiscal  stress  experienced  by  issuers  of 
public finance obligations or an increased incidence of Chapter 9 
filings or other restructuring proceedings by public finance issuers; 
(9)  failure  to  recover  claims  paid  on  Puerto  Rico  exposures  or 
incurrence  of  losses  in  amounts  higher  than  expected;  (10)  the 
Company’s inability to realize the expected recoveries included in 
its  financial  statements;  (11)  changes  in  Ambac  Assurance’s 
estimated representation and warranty recoveries or loss reserves 
over time; (12)  insufficiency or unavailability of collateral to pay 
secured  obligations;  (13)  credit  risk  throughout  the  Company’s 
business,  including  but  not  limited  to  credit  risk  related  to 

residential  mortgage-backed  securities,  student  loan  and  other 
asset securitizations, collateralized loan obligations, public finance 
obligations and exposures to reinsurers; (14) credit risks related to 
large  single  risks,  risk  concentrations  and  correlated  risks;  (15) 
concentration  and  essentiality  risk  in  connection  with  Military 
Housing  insured  debt;  (16)  the  risk  that  the  Company’s  risk 
management policies and practices do not anticipate certain risks 
and/or the magnitude of potential for loss; (17) risks associated 
with adverse selection as the Company’s insured portfolio runs off; 
(18) adverse effects on operating results or the Company’s financial 
position resulting from measures taken to reduce risks in its insured 
portfolio;  (19)  intercompany  disputes  or  disputes  with Ambac 
Assurance's  primary  insurance  regulator;  (20)  our  inability  to 
mitigate or remediate losses, commute or reduce insured exposures 
or achieve recoveries or investment objectives, or the failure of 
any  transaction  intended  to  accomplish  one  or  more  of  these 
objectives  to  deliver  anticipated  results;  (21)  the  Company’s 
substantial  indebtedness  could  adversely  affect  its  financial 
condition and operating flexibility; (22) the Company may not be 
able to obtain financing or raise capital on acceptable terms or at 
all due to its substantial indebtedness and financial condition; (23) 
restrictive covenants in agreements and instruments may impair 
the Company’s ability to pursue or achieve its business strategies; 
(24) loss of control rights in transactions for which we provide 
insurance due to a finding that Ambac Assurance has defaulted, 
whether due to the Segregated Account rehabilitation proceedings 
or  otherwise;  (25)  the  Company’s  results  of  operation  may  be 
adversely  affected  by  events  or  circumstances  that  result  in  the 
accelerated amortization of the Company’s insurance intangible 
asset; (26) adverse tax consequences or other costs resulting from 
the 
the  Segregated  Account  rehabilitation  plan,  or  from 
characterization  of  the  Company’s  surplus  notes  or  other 
obligations  as  equity;  (27)  risks  attendant  to  the  change  in 
composition of securities in the Company’s investment portfolio; 
(28) changes in tax law; (29) changes in prevailing interest rates; 
(30) changes on inter-bank lending rate reporting practices or the 
method  pursuant  to  which  LIBOR  rates  are  determined;  (31) 
factors  that  may  influence  the  amount  of  installment  premiums 
paid  to  the  Company,  including  the  Segregated  Account 
rehabilitation proceedings; (32) default by one or more of Ambac 
Assurance's  portfolio 
issuers  or 
investments, 
counterparties;  (33)  market  risks  impacting  assets  in  the 
Company’s investment portfolio or the value of our assets posted 
as collateral in respect of interest rate swap transactions; (34) risks 
relating  to  determinations  of  amounts  of  impairments  taken  on 
investments; (35) the risk of litigation and regulatory inquiries or 
investigations,  and  the  risk  of  adverse  outcomes  in  connection 
therewith,  which  could  have  a  material  adverse  effect  on  the 
Company’s business, operations, financial position, profitability 
or cash flows; (36) actions of stakeholders whose interests are not 
aligned with broader interests of the Company's stockholders; (37) 
the Company’s inability to realize value from Ambac UK or other 
subsidiaries of Ambac Assurance; (38) system security risks; (39) 
market spreads and pricing on interest rate derivative insured or 
issued by the Company; (40) the risk of volatility in income and 
earnings, including volatility due to the application of fair value 
accounting; (41) changes in accounting principles or practices that 
may  impact  the  Company’s  reported  financial  results;  (42) 
legislative and regulatory developments, including intervention by 
regulatory authorities; (43) the economic impact of “Brexit” may 
have  an  adverse  effect  on  the  Company’s  insured  international 
portfolio and the value of its foreign investments, both of which 

insured 

| Ambac Financial Group, Inc.   1   2017 FORM 10-K |

primarily reside with its subsidiary Ambac UK; (44) operational 
risks,  including  with  respect  to  internal  processes,  risk  and 
investment  models,  systems  and  employees,  and  failures  in 
services or products provided by third parties; (45) the Company’s 
financial position that may prompt departures of key employees 
and  may  impact  the  Company’s  ability  to  attract  qualified 
executives  and  employees;  (46)  implementation  of  new  tax 
legislation  signed  into  law  on  December  22,  2017  (commonly 
known  as  the  “Tax  Cuts  and  Jobs Act”)  may  have  unexpected 
consequences  for  the  Company  and  the  value  of  its  securities, 
particularly its common shares; (47) implementation of the Tax 
Cuts and Jobs Act may negatively impact the economic recovery 
of Puerto Rico, which could result in higher loss severities or an 
extended moratorium on debt service owed on Ambac Assurance-
insured  bonds  of  Puerto  Rico  and  its  instrumentalities;  (48) 
implementation of the Tax Cuts and Jobs Act could have a negative 
impact  on  municipal  issuers  of Ambac-insured  bonds;  and  (49) 
other risks and uncertainties that have not been identified at this 
time. 

PART I

Item 1.  Business

INTRODUCTION

the 
Ambac  Financial  Group,  Inc.  (“Ambac,”  "AFG"  or 
“Company”),  headquartered  in  New  York  City,  is  a  financial 
services holding company incorporated in the State of Delaware 
on April 29, 1991.   

Ambac’s provides financial guarantee policies through its principal 
operating  subsidiary,  Ambac  Assurance  Corporation  ("Ambac 
Assurance" or "AAC") and its wholly owned subsidiary Ambac 
Assurance UK Limited (“Ambac UK”), both of which have been 
in runoff since 2008.  Ambac has another wholly-owned subsidiary, 
Everspan Financial Guarantee Corp. (“Everspan”), which has been 
in runoff since its acquisition in 1997.   Insurance policies issued 
provide an unconditional and irrevocable  guarantee which protects 
the holder of a debt obligation against non-payment when due of 
the principal and interest on the obligations guaranteed.  Pursuant 
to such guarantees, Ambac Assurance and its subsidiaries make 
payments if the obligor responsible for making payments fails to 
do so when scheduled.  Revenues from financial guarantees consist 
of:  (i) premiums  earned  from  insurance  contracts,  net  of 
reinsurance, whether received upfront or on an installment basis 
and  (ii) amendment  and  consent  fees.  Expenses  from  financial 
guarantees consist of: (i) loss and commutation payments for credit 
exposures; (ii) loss-related expenses, including those relating to 
the remediation of problem credits; and (iii) insurance intangible 
amortization. 

Ambac Assurance has another wholly owned subsidiary, Ambac 
Credit  Products  LLC  (“ACP”)  that  issued  credit  derivative 
contracts for which it collects fees over the contract term. Credit 
derivative  contract  terms  are  substantially  similar  to  financial 
guarantee  insurance.    Credit  derivatives  also  permit  certain 
counterparties to assert mark-to-market termination claims under 
certain conditions; however, the assertion of such mark-to-market 
claims  has  been  enjoined  by  the  Second  Amended  Plan  of 
Rehabilitation (as defined below) and orders of the Rehabilitation 
Court (as defined below). See discussion of “Ambac Assurance 

Liquidity” in Part II, Item 7 included in this Form 10-K for further 
information. 

Ambac Assurance  and its subsidiaries have been working toward 
reducing uncertainties within its insured portfolio through active 
monitoring of key exposures such as municipal entities (including 
Puerto  Rico),  asset-backed  securities  (including  residential 
mortgage-backed  ("RMBS")  and  student  loans)  and  municipal 
entities with stressed financial conditions.  Additionally, Ambac 
Assurance and its subsidiaries are actively prosecuting legal claims 
(including  RMBS  related  lawsuits),  managing  the  regulatory 
framework applicable to the insurance entities, seeking to optimize 
capital allocation in a challenging environment that includes long 
duration obligations, and attempting to retain key employees.

The deterioration of the financial condition of Ambac Assurance 
and Ambac UK beginning in 2007 has prevented these companies 
from being able to write new business.  An inability to write new 
business has and will continue to negatively impact Ambac’s future 
operations and financial results. Ambac Assurance’s ability to pay 
dividends  and,  as  a  result,  Ambac’s  liquidity,  have  been 
significantly restricted by the deterioration of Ambac Assurance’s 
financial  condition  and  by  regulatory,  legal  and  contractual 
restrictions. It is highly unlikely that Ambac Assurance will be able 
to make dividend payments to Ambac for the foreseeable future. 
Including  Contractual 
Refer 
Restrictions" below and Note 8. Insurance Regulatory Restrictions
to the Consolidated Financial Statements included in Part II, Item 8 
in  this  Form  10-K,  for  more  information  on  dividend  payment 
restrictions. 

"Dividend  Restrictions, 

to 

Prior to the second  quarter of 2017, Ambac  had two reportable 
business  segments:  i)  the  financial  guarantee  segment,  which 
consisted  of  financial  guarantee  insurance  policies  and  credit 
derivative contracts and ii) the financial services segment which 
consisted of other financial products.  In the second quarter of 2017, 
the  Company  began  reporting  financial  guarantee  as  its  only 
reportable  business  segment.    Factors  management  took  into 
consideration  when  eliminating  the  financial  services  segment 
included (i) significant swap commutations in June 2017, which 
left  the  remaining  interest  rate  swaps  and  other  interest  rate 
derivatives  as  hedges  against  interest  rate  risk  in  the  financial 
guarantee and investment portfolios, (ii) the maturity of the last 
investment agreement in March 2017, (iii) the immateriality of the 
remaining conduit transactions, and (iv) the appointment of a new 
Chief Executive Officer effective January 1, 2017.  Management 
now  reviews  financial  information,  allocates  resources  and 
measures financial performance on a consolidated basis.  All prior 
period amounts and disclosures have been adjusted to reflect the 
reportable segment change.

On  May 1,  2013, Ambac  emerged  from  Chapter  11  bankruptcy 
protection  when  the  Second  Modified  Fifth Amended  Plan  of 
Reorganization became effective.  Upon emergence Ambac had 
no outstanding debt at the holding company and significant net 
operating  loss  carry-forwards,  of  which  $3.7  billion  remain  at 
December 31, 2017. 

Interest Rate Derivatives:

Interest rate derivative  transactions are executed through Ambac 
Financial Services (“AFS”), a wholly-owned subsidiary of Ambac 
Assurance. As  noted  above,  the  primary  activities  of AFS  is  to  

| Ambac Financial Group, Inc.   2   2017 FORM 10-K |

economically hedge interest rate risk in the financial guarantee and 
  Accordingly,  these  derivatives  are 
investment  portfolios. 
positioned  to  benefit  from  rising  rates.    Under  agreements 
governing  the  derivative  positions,  AFS  generally  must  post 
collateral or margin in excess of the market value of the swaps and 
futures  contracts.  In  addition,  most  of  AFS’s  counterparties 
currently possess the right to terminate their transactions with AFS 
and in the event of a rehabilitation of Ambac Assurance, some of 
AFS’s swaps could automatically terminate. A sudden termination 
of AFS’s derivatives, whether voluntarily or automatically, could 
result in losses. AFS has borrowed cash and securities from Ambac 
Assurance,  to  help  support  its  collateral  and  margin  posting 
requirements,  previous  termination  payments  and  other  cash 
needs. 

Ambac derives interest rate derivative revenues from  (i)  changes 
in the fair value of the derivatives portfolio resulting from interest 
rate fluctuations and (ii) the value of future contract terminations 
or  settlements  which  may  differ  from  the  carrying  value  of  the 
those contracts.

Credit risks relating to derivative positions primarily concern the 
default  of  a  counterparty.  Ambac's  interest  rate  derivatives 
generally consist of centrally cleared swaps, US treasury futures 
and  some  over-the-counter  ("OTC")  swaps  with  financial 
guarantee  customers or bank counterparties. Counterparty default 
exposure  is  mitigated  through  the  use  of  industry  standard 
collateral  posting  agreements  or  margin  posting  requirements. 
Cleared  swaps,  futures  and  OTC  derivatives  with  bank 
counterparties require margin or collateral to be posted up to or in 
excess of the market value of the derivatives. Derivative contracts 
entered into with financial guarantee customers are not subject to 
collateral  posting  agreements.  Credit  risk  associated  with  such 
customer  derivatives,  including  credit  derivatives,  is  managed 
through  the  risk  management  processes  described  in  the  Risk 
Management  Group  section  below.  In  some  cases,  derivatives 
between  Ambac  and  financial  guarantee  customers  are  placed 
through a third party financial intermediary and similarly do not 
require collateral posting.

AFS manages a variety of market risks inherent in its businesses, 
including  credit,  market,  liquidity,  operational  and  legal. These 
risks are identified, measured, and monitored through a variety of 
control  mechanisms,  which  are  in  place  at  different  levels 
throughout  the  organization.  See  “Quantitative  and  Qualitative 
Disclosures About Market Risk” included in Part II, Item 7A in 
this Form 10-K for further information. 

Investment Agreements:

issuers 

through 

Ambac  Assurance  issued  investment  agreements  to  structured 
finance  and  municipal 
its  wholly-owned 
subsidiary, Ambac Capital Funding. Investment agreements were 
customized for each investor to provide guaranteed interest and 
return  of  principal  in  accordance  with  their  requirements.  Each 
investment agreement was insured by Ambac Assurance through 
a  financial  guarantee  insurance  policy.  The  last  investment 
agreement matured in March 2017.

Funding Conduits:

A subsidiary of Ambac previously transferred financial assets to 
two special purpose entities. The business purpose of these entities 
was to provide certain financial guarantee clients with funding for 

their debt obligations. The activities of the special purpose entities 
are contractually limited to purchasing assets from Ambac, issuing 
medium-term notes (“MTNs”) to fund such purchases, executing 
derivative hedges and obtaining financial guarantee policies with 
respect  to  indebtedness  incurred.    As  of  December 31,  2017, 
Ambac Assurance or Ambac UK had financial guarantee insurance 
policies issued for all assets, MTNs and derivative contracts owned 
and outstanding by the entities. Ambac does not consolidate these 
entities under the relevant accounting guidance for consolidation 
of variable interest entities. See Note 2. Basis of Presentation and 
Significant  Accounting  Policies  and  Note  3.  Special  Purpose 
Entities, Including Variable Interest Entities to the Consolidated 
Financial Statements included in Part II, Item 8 in this Form 10-
K for further information. 

Corporate Strategy:

In  February  2018,  Ambac  achieved  one  of  its  key  strategic 
strategies,  the  exit  from  rehabilitation  of  Ambac  Assurance’s 
Segregated Account  (as  defined  below).   Having  accomplished 
this milestone, Ambac will continue to pursue and prioritize its 
remaining key strategic priorities, namely:

•  Active  runoff  of  Ambac  Assurance  and  its  subsidiaries 
through  transaction  terminations,  policy  commutations, 
settlements and restructurings, with a focus on our watch list 
credits and known and potential future adversely classified 
credits,  that  we  believe  will  improve  our  risk  profile,  and 
maximizing the risk-adjusted return on invested assets; 

•  Ongoing  rationalization  of  Ambac's  and  its  subsidiaries' 

capital and liability structures; 

•  Loss  recovery  through  active  litigation  management  and 

exercise of contractual and legal rights; 

•  Ongoing 

review  of  organizational  effectiveness  and 

efficiency of the operating platform; and 

•  Evaluation of opportunities in certain business sectors that 
meet  acceptable  criteria  that  will  generate  long-term 
stockholder value with attractive risk-adjusted returns. 

With  respect  to  our  new  business  strategy,  we  have  identified 
certain  business  sectors  adjacent  to Ambac's  core  business,  in 
which future opportunities will be evaluated.  The evaluation will 
be  conducted  through  a  measured  and  disciplined  approach  to 
identify  opportunities  that  are  synergistic  to  Ambac,  match 
Ambac's  core  competencies,  are  rapidly  scalable  or  available 
through  mergers  and  acquisitions  and  that  may  allow  for  the 
utilization of Ambac's net operating loss carry-forwards.  Although 
we  are  exploring  new  business  opportunities  for  Ambac,  no 
assurance can be given that we will be able to execute and/or obtain 
the financial and other resources that may be required to finance 
the acquisition or development of any new businesses or assets.  
Due to these factors, as well as uncertainties relating to the ability 
of Ambac Assurance to deliver value to Ambac, the value of our 
securities remains speculative. 

The  execution  of Ambac’s  strategy  to  increase  the  value  of  its 
investment in Ambac Assurance is subject to the restrictions set 
forth in the Settlement Agreement, dated as of June 7, 2010 (the 
"Settlement Agreement"), by and among Ambac Assurance, ACP, 
Ambac and certain counterparties to credit default swaps with ACP 

| Ambac Financial Group, Inc.   3   2017 FORM 10-K |

that  were  guaranteed  by  Ambac  Assurance,  as  well  as  the 
Stipulation  and  Order  (as  defined  in  Note  1.  Background  and 
Business  Description  to  the  Consolidated  Financial  Statements 
included  in  Part  II,  Item 8  in  this  Form  10-K),  each  of  which 
requires OCI (and in the case of the Settlement Agreement, under 
certain circumstances, holders of  surplus notes issued pursuant to 
the Settlement Agreement) to approve certain actions taken by or 
in respect of Ambac Assurance.  In exercising its rights under the 
Stipulation and Order or Settlement Agreement, OCI will act for 
the  benefit  of  policyholders,  and  will  not  take  into  account  the 
interests  of  Ambac.    See  Note  1.  Background  and  Business 
Description to the Consolidated Financial Statements included in 
Part II, Item 8 in this Form 10-K  for further information. 

Opportunities for remediating losses on poorly performing insured 
transactions  also  depend  on  market  conditions,  including  the 
perception of Ambac Assurance’s creditworthiness, the structure 
of  the  underlying  risk  and  associated  policy  as  well  as  other 
counterparty  specific  factors.    Ambac  Assurance's  ability  to 
commute  policies  or  purchase  certain  investments  may  also  be 
limited by available liquidity.

Segregated Account

In March 2010, Ambac Assurance established a segregated account 
pursuant 
to  Wisconsin  Stat.  §611.24(2)  (the  “Segregated 
Account”) to segregate certain segments of Ambac Assurance’s 
liabilities. The Office of the Commissioner of Insurance for the 
State of Wisconsin (“OCI” (which term shall be understood to refer 
to such office as regulator of Ambac Assurance and to refer to the 
Commissioner  of  Insurance  for  the  State  of  Wisconsin  as 
rehabilitator of the Segregated Account (the “Rehabilitator”), as 
the  context  requires))  commenced  rehabilitation  proceedings  in 
the Wisconsin Circuit Court for Dane County (the “Rehabilitation 
Court”) with respect to the Segregated Account (the “Segregated 
Account Rehabilitation Proceedings”) in order to permit OCI to 
facilitate  an  orderly  run-off  and/or  settlement  of  the  liabilities 
allocated to the Segregated Account pursuant to the provisions of 
the Wisconsin Insurers Rehabilitation and Liquidation Act.  Ambac 
Assurance is not, itself, in rehabilitation proceedings. 

On  October 8,  2010,  OCI  filed  a  plan  of  rehabilitation  for  the 
Segregated  Account  (the  "Segregated  Account  Rehabilitation 
Plan")  in  the  Rehabilitation  Court.  The  Rehabilitation  Court 
confirmed  the  Segregated  Account  Rehabilitation  Plan  on 
January 24,  2011.  On  June  11,  2014,  the  Rehabilitation  Court 
approved amendments to the Segregated Account Rehabilitation 
Plan and the Segregated Account Rehabilitation Plan, as amended, 
became effective on June 12, 2014.

On  September  25,  2017  the  Rehabilitator  filed  a  motion  in  the 
Rehabilitation  Court  seeking  entry  of  an  order  approving  an 
amendment  to  the  Segregated Account  Rehabilitation  Plan  (the 
"Second  Amended  Plan  of  Rehabilitation").    Following  the 
conclusion of a Confirmation Hearing on January 22, 2018, the 
Rehabilitation Court entered an order granting the Rehabilitator's 
motion  and  confirming 
the  Second  Amended  Plan  of 
Rehabilitation. On February 12, 2018 (the "Effective Date"), the 
Second  Amended  Plan  of  Rehabilitation  became  effective.  
Consequently, the rehabilitation of the Segregated Account was 
concluded. Refer to Note 1. Background and Business Description 
to the Consolidated Financial Statements included in Part II, Item 8 

in this Form 10-K, for more information on the Segregated Account 
and the Segregated Account Rehabilitation Proceedings.

Enterprise Risk Management

The Company's policies and procedures relating to risk assessment 
and risk management are overseen by its Board of Directors. The 
Board  takes  an  enterprise-wide  approach  to  risk  management 
oversight that is designed to support the Company's business plans 
at a reasonable level of risk. A fundamental part of risk assessment 
and  risk  management  is  not  only  understanding  the  risks  the 
Company faces and what steps management is taking to manage 
those risks, but also understanding what level of risk is appropriate 
for  the  Company. The  Board  of  Directors  annually  reviews  the 
Company's business plan, factoring risk management into account. 
It  also  approves  the  Company's  risk  appetite  statements,  which 
articulate the Company's tolerance for certain risks and describes 
the general types of risk that the Company accepts, within certain 
parameters, or attempts to avoid. 

While  the  Board  of  Directors  has  the  ultimate  oversight 
the  risk  management  process,  various 
responsibility  for 
committees of the Board also have responsibilities related to risk 
assessment  and  risk  management,  and  management  has 
responsibility  for  managing  the  risks  to  which  the  Company  is 
exposed and reporting on such matters to the Board of Directors 
and applicable Board committees.

•  The  Audit  Committee  oversees  the  management  of  risks 
associated with the integrity of Ambac’s financial statements 
and its compliance with legal and regulatory requirements. In 
addition, the Audit Committee discusses policies with respect 
to  risk  assessment  and  risk  management,  including  major 
financial risk exposures and the steps management has taken 
to monitor and control such exposures. The Audit Committee 
reviews  with  management,  internal  auditors,  and  external 
auditors  Ambac's  accounting  policies,  Ambac's  system  of 
internal controls over financial reporting and the quality and 
appropriateness  of  disclosure  and  content  in  the  financial 
statements and other external financial communications.

•  The Compensation Committee oversees the management of 
risk primarily associated with our ability to attract, motivate 
and  retain  quality  talent,  particularly  executive  talent, 
compensation structures that might lead to undue risk taking, 
and disclosure of our executive compensation philosophies, 
strategies and activities.

•  The  Governance  and  Nominating  Committee  oversees  the 
management  of  risk  primarily  associated  with  Ambac’s 
ability  to  attract  and  retain  quality  directors,  Ambac’s 
corporate  governance  programs  and  practices  and  our 
compliance  therewith.  Additionally,  the  Governance  and 
Nominating Committee oversees the processes for evaluation 
of  the  performance  of  the  Board,  its  committees  and 
management  each  year  and  considers  risk  management 
effectiveness as part of its evaluation. The Governance and 
Nominating  Committee  also  performs  oversight  of  the 
business  ethics  and  compliance  program,  and  reviews 
compliance with Ambac’s Code of Business Conduct.

•  The  Strategy  and  Risk  Policy  Committee  oversees  the 
management of risk and risk appetite primarily with respect 
to strategic plans and initiatives, oversight of Ambac’s capital 

| Ambac Financial Group, Inc.   4   2017 FORM 10-K |

structure,  financing  and  treasury  matters  and  oversight  of 
management's process for the identification, evaluation and 
mitigation  of  Ambac’s  financial  and  commercial-related 
risks.

The  full  Board  also  receives  quarterly  updates  from  Board 
committees,  and  the  Board  provides  guidance  to  individual 
committee activities as appropriate.

In order to assist the board of directors in overseeing Ambac’s risk 
management,  Ambac  uses  enterprise  risk  management,  a 
company-wide  process  that  involves  the  Board  of  Directors, 
management and other personnel in an integrated effort to identify, 
assess and manage a broad range of risks (e.g., credit, financial, 
legal,  liquidity,  market,  model,  operational,  regulatory  and 
strategic), that may affect the Company’s ability to execute on its 
corporate strategy and fulfill its business objectives. The Enterprise 
Risk Committee (“ERC”), which is a management committee, is 
comprised of senior level management responsible for assisting in 
the  management  of  the  Company’s  risks  on  an  individual  and 
aggregate basis. The ERC produces the relevant risk management 
information for senior management, the Board of Directors and 
applicable Board committees.   

Ambac management has established other committees to assist in 
managing the risks embedded in the enterprise.  These committees 
will meet monthly or as needed on an ad hoc basis.  

•  The  Asset  Liability  Management  Committee's  (“ALCO”) 
objective is to foster an enterprise wide culture and approach 
to liquidity management, asset management, asset valuation 
and hedging.  Members of ALCO include the Chief Executive 
Officer, Chief Financial Officer and senior managers from 
investment management and the Risk Management Group. 

•  The  Risk  Committee's  objective 

is  establish  an 
interdisciplinary team of professionals from different parts of 
the company to provide oversight of the key risk remediation 
issues impacting Ambac.  The purview of the committee is to 
review  and  approve  risk  remediation  activities  for  the 
financial  guarantee  insured  portfolio  as  well  as  review 
changes to Ambac's adversely classified, survey and watch 
list credits (as defined in Note 2. Basis of Presentation and 
Significant  Accounting  Policies).    This  committee  was 
established in the fourth quarter of 2017.  Previously, most 
risk  remediation  activities  were  approved  by  ALCO.  
Members of the Risk Committee  include the Chief Executive 
Officer, Head of Risk Management, Chief Financial Officer 
and senior managers from throughout risk, corporate services 
group,  operations,  investment  management,  legal  and 
finance. 

Available Information

Our Internet address is www.ambac.com. We make available free 
of charge, through the investor relations section of our web site, 
annual reports on Form 10-K, quarterly reports on Form 10-Q and 
current reports on Form 8-K, and any amendments to those reports, 
filed  or  furnished  pursuant  to  Section 13(a)  or  15(d)  of  the 
Securities Exchange Act of 1934, as amended, as well as proxy 
statements,  as  soon  as  reasonably  practicable  after  we 
electronically  file  such  material  with,  or  furnish  it  to,  the  U.S. 
Securities  and  Exchange  Commission.  Our  Investor  Relations 
Department can be contacted at Ambac Financial Group, Inc., One 

State  Street  Plaza,  New York,  New York  10004, Attn:  Investor 
Relations, telephone: 212-208-3222 email: ir@ambac.com. The 
reference to our website address does not constitute inclusion or 
incorporation  by  reference  of  the  information  contained  on  our 
website in this Form 10-K or other filings with the SEC, and the 
information contained on our website is not part of this document. 

RISK MANAGEMENT GROUP

Financial  guarantee  insurance  and  credit  derivatives  ("financial 
guarantees")  were  sold  in  three  principal  markets:  U.S.  public 
finance, U.S. structured finance and international finance.  Ambac’s 
financial  guarantee  insurance  policies  and  credit  derivative 
contracts expose the Company to the direct credit risk of the assets 
and/or  obligor  supporting  the  guaranteed  obligation.  In  addition, 
insured  transactions  expose  Ambac  to  indirect  risks  that  may 
increase  our  overall  risk,  such  as  credit  risk  separate  from,  but 
correlated  with,  our  direct  credit  risk,  market,  model,  economic, 
natural disaster and mortality or other non-credit type risks.  Please 
refer to Item 7 “Management’s Discussion and Analysis of Financial 
Condition  and  Results  of  Operations  -  Financial  Guarantees  in 
Force” section below for details on the financial guarantee insured 
portfolio.

The  Risk  Management  Group  is  primarily  responsible  for  the 
development,  implementation  and  oversight  of  loss  mitigation 
strategies,  surveillance  and  remediation  of  the  insured  financial 
guarantee portfolio (including through the pursuit of recoveries in 
respect of paid claims and commutations of policies). Our ability to 
execute certain risk management activities may be limited by the  
restrictions set forth in the Settlement Agreement and the Stipulation 
and Order.  See Note 1. Background and Business Description to 
the Consolidated Financial Statements included in Part II, Item 8 in 
this Form 10-K for further information. 

Ambac’s Risk Management Group ("RMG") has an organizational 
structure designed around four primary areas of focus: Surveillance, 
Risk Remediation, Credit Risk Management and Loss Reserving 
and  Analytics. The Head of Risk Management reports directly to 
Ambac's Chief Executive Officer and regularly informs and updates 
the Audit  Committees  of  the  Boards  of  Directors  of Ambac  and 
Ambac Assurance with respect to risk-related topics in the insured 
portfolio.

Surveillance 

This group's focus is on the early identification of potential stress 
or deterioration in connection with exposures in the insured portfolio 
and  the  related  credit  analysis  associated  with  these  and  other 
insured portfolio exposures.

Analysts in this group perform periodic credit reviews of insured 
exposures according to a schedule based on the risk profile of the 
guaranteed obligations or as necessitated by specific credit events 
or  other  macro-economic  variables.  Risk-adjusted  surveillance 
strategies  have  been  developed  for  each  bond  type  with  review 
periods  and  scope  of  review  based  upon  each  bond  type’s  risk 
profile. The risk profile is assessed regularly in response to our own 
experience and judgments or external factors such as the economic 
environment and industry trends. In general, surveillance activities 
are designed to detect deterioration in credit quality or changes in 
the  economic,  regulatory  or  political  environment  which  could 
adversely impact the portfolio. Active surveillance enables analysts 

| Ambac Financial Group, Inc.   5   2017 FORM 10-K |

to track single credit migration and industry credit and performance 
trends. 

The focus of a related credit review is to assess performance, identify 
credit  trends  and  recommend  appropriate  credit  classifications, 
ratings and changes to a transaction or bond type’s review period 
and  surveillance  requirements.    Please  refer  to  Note  2.  Basis  of 
Presentation  and  Significant  Accounting  Policies 
the 
Consolidated Financial Statements included in Part II, Item 8 in this 
Form  10-K  for  further  discussion  of 
the  various  credit 
classifications.  If a problem is detected, the Surveillance group will 
then work with the Risk Remediation group on a loss mitigation 
plan, as necessary. 

to 

Surveillance  for  collateral  dependent  transactions,  including,  but 
not limited to, residential mortgage-backed securities (“RMBS”), 
asset-backed  securities  (“ABS”)  and  student  loan  transactions, 
focuses  on  reviews  of  the  underlying  asset  cash  flows  and,  if 
applicable,  the  performance  of  servicers  or  collateral  managers. 
Ambac  Assurance  generally  receives  periodic  reporting  of 
transaction  performance  from  issuers  or  trustees.  Surveillance 
analysts  review  these  reports  to  monitor  performance  and,  if 
necessary, seek legal advice to ensure that reporting and application 
of cash flows comply with transaction requirements. 

Risk Remediation

This  group’s  focus  is  on  risk  remediation,  loss  mitigation  and 
restructuring related to the insured portfolio of Ambac Assurance. 

Risk  remediation  helps  to  reduce  exposure  to  credits  that  are 
developing, have the potential for future adverse development or 
are already adversely classified by, among other things, securing 
rights and remedies, both of which help to mitigate losses in the 
event of further deterioration or event of default, or, as available, 
working with an issuer to refinance or retire debt.

Loss  mitigation  focuses  on  the  analysis,  implementation  and 
execution  of  commutation  and  related  claims  reduction  or 
defeasance strategies for policies with potential future claims. Loss 
mitigation prioritizes policies, or portions thereof, for commutation, 
refinancing or other claims reduction or defeasance strategies.

Restructuring  or  workout  is  the  focused  and  active  process  of 
minimizing claims and maximizing  recoveries typically following 
an event of default. The emphasis on reducing risk is centered on 
reducing enterprise-wide exposure on a prioritized basis. 

For certain adversely classified, survey list  and watch list credits, 
Risk  Remediation  analysts  will  develop  and  implement  a 
remediation or loss mitigation plan that could include actions such 
as  working with the issuer, trustee, bond counsel, servicer and other 
interested  parties  in  an  attempt  to  remediate  the  problem  and 
minimize  Ambac  Assurance’s  exposure  to  potential  loss.  Other 
actions  could  include  working  with  bond  holders  and  other 
economic stakeholders to negotiate, structure and execute solutions, 
such as commutations. 

Adversely classified, survey list and watch list credits are tracked 
closely by Surveillance analysts together with Risk Remediation 
analysts as part of the Risk Remediation  process and discussed at 
regularly scheduled meetings with Credit Risk Management (see 
discussion following in “Credit Risk Management”) and the Risk 
Committee  (see  discussion  following  in  "Risk  Committee").    In 
some cases, Risk Remediation will engage restructuring or workout 

experts,  attorneys  and/or  other  consultants  with  appropriate 
expertise in the targeted loss mitigation area to assist management 
in  examining  the  underlying  contracts  or  collateral,  providing 
industry specific advice and/or executing strategies.

In Risk Remediation, we  have established cross-functional teams 
in key areas of focus, comprised of personnel both within the RMG 
and  in  other  departments,  to  target  proactive  mitigation  and 
remediation  of  losses  and  potential  future  losses  associated  with 
certain credits and sectors in the insured portfolio. Examples of such 
efforts include teams of professionals focused on (i) the review and 
enforcement of contractual representations and warranties in RMBS 
policies, (ii) RMBS servicing and (iii) the analysis and prioritization 
of policies with projected claims or the potential for future material 
adverse  development  to  target  and  execute  risk  reduction, 
restructuring and commutation strategies. Members of these cross-
functional teams will often work with external experts in the pursuit 
of risk reduction efforts. 

For RMBS servicing, the team focuses on servicer oversight and 
remediation.  Analysts monitor the performance of servicers through 
a  combination  of  (i) regular  reviews  of  servicer  performance; 
(ii) compliance  certificates  received  from  servicer  management; 
(iii) independent rating agency information; (iv)  reviews of servicer 
financial information; and (v) onsite servicing diligence. 

In  some  transactions, Ambac Assurance  has  the  right  to  direct  a 
transfer of RMBS and other servicing to an alternative servicer, upon 
certain  events  and  subject  to  certain  conditions. The  decision  to 
exercise this right is made based on various factors, including an 
assessment  of  the  performance  of  the  existing  servicer  and  an 
assessment  of  whether  a  transfer  of  servicing  may  improve  the 
performance of the collateral and reduce risk to Ambac Assurance.  
In the case of RMBS, Ambac Assurance has developed relationships 
with preferred servicers. Preferred servicers are selected through a 
formalized servicer review process that determines, among other 
key  factors,  the  servicer’s  ability  and  willingness  to  actively 
implement intense and proven loss mitigation activities on RMBS. 
Ambac Assurance  may  decide  to  exercise  its  rights  to  direct  the 
transfer of servicing to a preferred servicer where such rights are 
available. The transfer of servicing is done with the objectives of 
(i) minimizing losses and distress levels by deploying targeted and 
enhanced  loss  mitigation  programs;  (ii) increasing  visibility  to 
Ambac Assurance of all servicing activities that impact overall deal 
performance; (iii) better aligning the servicer’s financial interest to 
the performance of the underlying deal through the utilization of 
performance based incentives; and (iv) reducing the risk of servicer 
underperformance due to servicer financial difficulty.

Ambac  Assurance  believes  that  the  loss  mitigation  activities, 
alignment of interests and close monitoring of servicers constitute 
credible means of minimizing risks and losses related to insured 
RMBS. 

A  team  of  professionals  is  focused  on  recoveries  from  sponsors 
where  Ambac  Assurance  believes  material  breaches  of 
representations and warranties have occurred with respect to certain 
RMBS policies.  The team engages with experienced consultants to 
perform the re-underwriting of loan files and consults with internal 
and external legal counsel with regard to loan putbacks as well as 
settlement  and  litigation  strategies  (refer  to  Note  2.  Basis  of 
Presentation  and  Significant  Accounting  Policies  and  Note  7. 
Financial  Guarantee  Insurance  Contracts  to  the  Consolidated 

| Ambac Financial Group, Inc.   6   2017 FORM 10-K |

Financial Statements included in Part II, Item 8 in this Form 10-K 
for further discussion on this topic). 

Loss Reserving and Analytics ("LRA")

LRA  manages  the  quarterly  loss  reserving  process  for  insured 
portfolio credits with projected policy claims. It also supports the 
development, operation and/or  maintenance of various analytical 
models used in the loss reserving process as well as in other risk 
management  functions.    LRA  works  with  Surveillance  and  Risk 
Remediation  analysts  responsible  for  a  particular  credit  on  the 
development, review and implementation of loss reserve scenarios 
and related analysis.

Credit Risk Management ("CRM")

CRM  manages  the  decision  process  for  all  material  matters  that 
affect  credit  exposures  within  the  insured  portfolio.  While  not 
responsible for the credit analysis or execution of risk remediation 
or loss mitigation strategies, CRM provides a forum for independent 
assessments,  reviews  and  approvals  and  drives  consistency  and 
timeliness. The scope of credit matters under the purview of CRM 
includes material amendments, waivers and consents, evaluation of 
remediation  or  loss  mitigation  plans,  credit  review  scheduling, 
adverse  credit  classification  and  below  investment  grade  rating 
designations, adversely classified credit reviews, sector reviews and 
overall portfolio review. 

The CRM decision process may involve a review of structural, legal, 
political and credit issues and also includes determining the proper 
level of approval, which varies based on the nature and materiality 
of the matter.  In particular, formal  plans or transactions that relate 
to risk remediation, loss mitigation or restructuring may also require 
Risk Committee approval. In addition, such plans or transactions 
that  have  material  asset  liquidity  implications  may  also  require 
ALCO approval.

Control Rights

In  structured  transactions,  including  structured  public  finance 
transactions, Ambac Assurance often is the control party as a result 
of  insuring  the  transaction’s  senior  class  or  tranche. The  control 
party may direct specified parties, usually the trustee, to take or not 
take certain actions following contractual defaults or trigger events. 
Control  rights  and  the  scope  of  direction  and  remedies  vary 
considerably  among  our  insured  transactions.  Because  Ambac 
Assurance  is  party  to  and/or  has  certain  rights  in  documents 
supporting transactions in the insured portfolio, Ambac Assurance 
frequently receives requests for amendments, waivers and consents 
(“AWCs”).  Ambac Assurance’s risk management personnel review, 
analyze  and  process  all  requests  for  AWCs.  As  a  part  of  the 
Segregated Account Rehabilitation Proceedings, the Rehabilitation 
Court enjoined certain actions by other parties to preserve Ambac 
Assurance’s control rights that could otherwise have lapsed or been 
compromised.  By  way  of 
the  Second  Amended  Plan  of 
Rehabilitation  and  orders  of  the  Rehabilitation  Court,  such 
protections are intended to be continued after the consummation of 
the  Rehabilitation  Exit  Transactions  (as  defined  in  Note  1. 
Background and Business Description to the Consolidated Financial 
Statements, included in Part II, Item 8 in this Form 10-K).

Adversely Classified Credit Review 

Credits that are either in default or have developed problems that 
eventually  may  lead  to  a  default  are  tracked  closely  by  the 
appropriate Surveillance and Risk Remediation teams and discussed 

at meetings with CRM.  Adversely classified credit meetings include 
members  of  CRM,  Surveillance,  Risk  Remediation  and  legal,  as 
necessary. As part of the review, relevant information, along with 
the plan for corrective actions and a reassessment of the credit’s 
rating and credit classification is considered. Internal and/or external 
counsel generally review the documents underlying any problem 
credit and, if applicable, an analysis is prepared outlining Ambac 
Assurance’s rights and potential remedies, the duties of all parties 
involved  and  recommendations  for  corrective  actions.  Ambac 
Assurance  also  meets  with  relevant  parties  to  the  transaction  as 
necessary. The review schedule for adversely classified credits is 
tailored to the remediation plan to track and prompt timely action 
and  proper  internal  and  external  resourcing.  A  summary  of 
developments  regarding  adversely  classified  credits  and  credit 
trends is also provided to the Credit Committee and Ambac’s and 
Ambac Assurance’s Board of Directors no less than quarterly.

The insured portfolio contains exposures that are correlated and/or 
concentrated. Risk Management's surveillance includes identifying 
these types of exposures and identifying the risks that would or could 
trigger credit deterioration across the related exposures. When such 
risks occur, adverse credit classification may be warranted across 
many of the correlated and/or concentrated exposures. This is the 
case with student loans and RMBS, for example, which have several 
correlations  including  those  associated  with  consumer  lending, 
unemployment  and  home  prices.  In  the  past,  our  not-for-profit 
healthcare and our leveraged lease exposures experienced periods 
of  stress  arising  from  their  concentrated  and/or  correlated  risks, 
when  there  were  major  changes  to  healthcare  reimbursement 
programs especially Medicaid, or significant weakness in consumer 
and  business  travel,  in  the  case  of  the  former  and  the  latter, 
respectively.  In  the  future, Ambac’s  portfolio  may  be  subject  to 
similar  credit  deterioration  arising  from  concentrated  and/or 
correlated risks. Examples of other such risks that could impact our 
portfolio, and that our surveillance is designed to monitor include 
the impact of potential municipal bankruptcy contagion, the impact 
of tax reform on state and municipal bond issuers, or the impact of 
large  scale  domestic  military  cutbacks  on  our  military  housing 
portfolio or event risk such as natural disasters or other regional 
stresses. Most such risks cannot be predicted, and may materialize 
unexpectedly or develop rapidly. Although our surveillance allows 
us to connect the event and stress to the related exposures and assign 
an  adverse  credit  classification  and  estimate  losses  across  the 
affected  credits,  when  necessary,  we  may  not  have  adequate 
resources or contractual rights and remedies to mitigate loss arising 
from such risks. 

Amendment, Waiver and Consent Review / Approval 

The decision to approve or reject AWCs is based upon certain credit 
factors, such as the issuer’s ability to repay the bonds and the bond’s 
security  features  and  structure.  Members  of Ambac Assurance’s  
Surveillance  group  review,  analyze  and  process  all  requests  for 
AWCs.  All  AWCs  are  initially  screened  for  materiality  in  the 
Surveillance group. Non-material AWCs require the approval of at 
least  the  Surveillance  analyst  and  the  Surveillance  manager. 
Material AWCs are within the purview of CRM, as noted above. 
For material AWCs, CRM has established minimum requirements 
that may be modified to require more or varied approvals depending 
upon the matter’s complexity, size or other characteristics. 

Ambac  Assurance  assigns  internal  credit  ratings  to  individual 
exposures as part of the AWC process and at surveillance reviews. 
These internal credit ratings, which represent Ambac Assurance’s 

| Ambac Financial Group, Inc.   7   2017 FORM 10-K |

independent 
parameters consistent with the exposure type. 

judgments,  are  based  upon  underlying  credit 

Risk Committee

The  Risk  Committee  is  a  management  committee  that  was 
established in the fourth quarter of 2017, as an interdisciplinary body 
of expertise from different parts of the Ambac Assurance to provide 
oversight  of  the  key  risk  remediation,  loss  mitigation  and 
restructuring issues (collectively "risk remediation") impacting the 
Company. The committee comprises the CEO, CFO, Head of Risk 
Management, as chair, General Counsel, and other key personnel 
from the Risk Management,  Finance, Corporate Services and  Legal 
departments. 

The mission of the committee is to: (i) to enhance, improve and 
standardize the key impact metrics, including economic, financial, 
and strategic, considered when making risk remediation decisions; 
(ii)  to  ensure  a  timely,  rigorous  and  thorough  approach  to  risk 
remediation at Ambac Assurance and the prudent and economically 
accretive use of capital in support of these activities; and (iii) to 
enhance  enterprise-wide  communication  and  cooperation  in 
connection with these core Ambac Assurance business strategies.

The purpose of the Risk Committee is to: (i)  to review on a periodic 
basis changes to Ambac Assurance internal credit classifications and 
ratings of adversely classified credits, survey list credits, and watch 
list credits after the aforementioned CRM process; (ii) to review and 
approve  risk  remediation  plans  for  adversely  classified  credits, 
survey list credits and watch list credits; (iii) to provide oversight 
and  to  review  new  risk  remediation  structures  or  approaches  in 
connection with risk remediation plans or anticipated transactions;  
(iv) to review and approve  proposed risk remediation transactions 
whereby Ambac Assurance  is  making  an  economic  contribution; 
and (iv) other such risk remediation activities that Ambac Assurance 
may delegate to the Risk Committee.

INSURANCE REGULATORY MATTERS AND 
OTHER RESTRICTIONS

Regulatory Matters

United States 

Ambac Assurance  and  Everspan  are  domiciled  in  the  State  of 
Wisconsin  and,  as  such,  are  subject  to  the  insurance  laws  and 
regulations of the State of Wisconsin (the “Wisconsin Insurance 
Laws”)  and  are  regulated  by  the  OCI.  In  addition,  Ambac 
Assurance  and  Everspan  are  subject  to  the  insurance  laws  and 
regulations of the other jurisdictions in which they are licensed. 
See Note 8. Insurance Regulatory Restrictions to the Consolidated 
Financial Statements included in Part II, Item 8 in this Form 10-
K for further information on regulatory restrictions. 

In addition, pursuant to the terms of the Settlement Agreement and 
the  Stipulation  and  Order,  Ambac  Assurance  must  seek  prior 
approval  by  OCI  of  certain  corporate  actions.  The  Settlement 
Agreement  and  Stipulation  and  Order  include  covenants  which 
restrict  the  operations  of  Ambac  Assurance.  The  Settlement 
Agreement  will  remain  in  force  until  the  surplus  notes  issued 
thereunder have been redeemed, repurchased or repaid in full. The 
Stipulation  and  Order  will  remain  in  force  for  so  long  as  OCI 
determines  it  to  be  necessary.  Certain  of  the  restrictions  in  the 
Settlement Agreement may be waived with the approval of the OCI 
and/or the requisite percentage of holders of surplus notes issued 
thereunder. 

United Kingdom 

The  Prudential  Regulatory  Authority  ("PRA")  and  Financial 
Conduct Authority ("FCA") (and their predecessor regulator the 
Financial Services Authority (“FSA”)) have exercised significant 
oversight  of  Ambac  UK  since  2008,  after  Ambac,  Ambac 
Assurance and Ambac UK began experiencing financial stress.  In 
2009, Ambac UK’s license to write new business was curtailed by 
the FSA and the insurance license was limited to undertaking only 
run-off related activity. As such, Ambac UK is authorized to run-
off its insurance portfolio in the United Kingdom, and to do the 
same through a branch in Milan, Italy, and a number of other EU 
countries.  EU  legislation  has  allowed  Ambac  UK  to  conduct 
business in EU states other than the United Kingdom through a 
“passporting”  arrangement,  which  eliminates  the  necessity  of 
additional 
those  other  EU 
jurisdictions.  See Note 8. Insurance Regulatory Restrictions to the 
Consolidated Financial Statements included in Part II, Item 8 in 
this Form 10-K for further information on regulatory restrictions. 

licensing  or  authorization 

in 

Regulations over change in control 

Under Wisconsin law applicable to insurance holding companies, 
any acquisition of control of Ambac, and any other direct or indirect 
control  of  Ambac  Assurance  and  Everspan,  requires  the  prior 
approval of the OCI. “Control” is defined as the direct or indirect 
power  to  direct  or  cause  the  direction  of  the  management  and 
policies  of  a  person.  Any  purchaser  of  10%  or  more  of  the 
outstanding  voting  stock  of  a  corporation  is  presumed  to  have 
acquired control of that corporation and its subsidiaries unless the 
OCI, upon application, determines otherwise. For purposes of this 
test, Ambac believes that a holder of common stock having the 
right to cast 10% or more of the votes which may be cast by the 
holders of all shares of common stock of Ambac would be deemed 
to  have  control  of Ambac Assurance  and  Everspan  within  the 
meaning of the Wisconsin Insurance Laws. The United Kingdom 
has similar requirements applicable in respect of Ambac, as the 
ultimate holding company of Ambac UK. 

Common Stock Restrictions

Ambac’s Amended and Restated Certificate of Incorporation limits 
voting  and  transfer  rights  of  stockholders  in  significant  ways. 
Article  IV  contains  voting  restrictions  applicable  to  any  person 
owning at least 10% of Ambac’s common stock so that such person 
(including  any  group  consisting  of  such  person  and  any  other 
person with whom such person or any affiliate or associate of such 
person has any agreement, contract, arrangement or understanding 
with respect to acquiring, voting, holding or disposing of Ambac’s 
common stock) shall not be entitled to cast votes in excess of one 
vote less than 10% of the votes entitled to be cast by all common 
stock holders, except as otherwise approved by OCI.

There are substantial restrictions on the ability to transfer Ambac’s 
common stock set forth in Article XII of Ambac’s Amended and 
Restated Certificate of Incorporation. In order to preserve certain 
tax benefits, subject to limited exceptions, any attempted transfer 
of common stock shall be prohibited and void to the extent that, 
as a result of such transfer (or any series of transfers of which such 
transfer is a part), either (i) any person or group of persons shall 
become a holder of 5% or more of the Company’s common stock 
or (ii) the percentage stock ownership interest in Ambac of any 
holder of 5% or more of the Company’s common stock shall be 
increased  (a  “Prohibited Transfer”). These  restrictions  shall  not 
apply to an attempted transfer if the transferor or the transferee 

| Ambac Financial Group, Inc.   8   2017 FORM 10-K |

obtains the written approval of Ambac’s Board of Directors to such 
transfer. A purported transferee of a Prohibited Transfer shall not 
be  recognized  as  a  stockholder  of  Ambac  for  any  purpose 
whatsoever in respect of the securities which are the subject of the 
Prohibited  Transfer  (the  “Excess  Securities”).  Until  the  Excess 
Securities are acquired by another person in a transfer that is not 
a  Prohibited  Transfer,  the  purported  transferee  of  a  Prohibited 
Transfer shall not be entitled with respect to such Excess Securities 
to  any  rights  of  stockholders  of  Ambac,  including,  without 
limitation, the right to vote such Excess Securities and to receive 
dividends  or  distributions,  whether  liquidating  or  otherwise,  in 
respect  thereof,  if  any.  Once  the  Excess  Securities  have  been 
acquired in a transfer that is not a Prohibited Transfer, the securities 
shall cease to be Excess Securities. If the Board determines that a 
transfer of securities constitutes a Prohibited Transfer then, upon 
written demand by Ambac, the purported transferee shall transfer 
or  cause  to  be  transferred  any  certificate  or  other  evidence  of 
ownership  of  the  Excess  Securities  within  the  purported 
transferee’s possession or control, together with any distributions 
paid by Ambac with respect to such Excess Securities, to an agent 
designated by Ambac. Such agent shall thereafter sell such Excess 
Securities and the proceeds of such sale shall be distributed as set 
forth in the Amended and Restated Certificate of Incorporation. If 
the  purported  transferee  of  a  Prohibited Transfer  has  resold  the 
Excess Securities before receiving such demand, such person shall 
be deemed to have sold the Excess Securities to Ambac’s agent 
and shall be required to transfer to such agent the proceeds of such 
sale, which shall be distributed as set forth in the Amended and 
Restated Certificate of Incorporation.

Dividend Restrictions, Including Contractual Restrictions 

Due to contractual and regulatory restrictions, Ambac Assurance 
has been unable to pay common dividends to Ambac since 2008 
and  will  be  unable  to  pay  common  dividends  in  2018  without 
certain approvals, including the prior consent of the OCI, which 
is unlikely. Ambac Assurance’s ability to pay dividends is further 
restricted by the Settlement Agreement, the Stipulation and Order 
and the terms of its Auction Market Preferred Shares ("AMPS"). 
See Note 8. Insurance Regulatory Restrictions to the Consolidated 
Financial Statements included in Part II, Item 8 in this Form 10-
K for further information on dividends. 

As a result of these restrictions, Ambac Assurance is not expected 
to pay dividends to Ambac for the foreseeable future. 

Ambac  UK  is  not  expected  to  pay  any  dividends  to  Ambac 
Assurance  for  the  foreseeable  future.  While  the  UK  insurance 
regulatory laws impose no statutory restrictions on an insurer’s 
ability  to  declare  a  dividend,  the  PRA’s  and  FCA’s  capital 
requirements  in  practice  act  as  a  restriction  on  the  payment  of 
dividends, where a firm has a lower level of regulatory capital than 
its regulatory capital requirement as is the case for Ambac UK. 
Further, the FSA amended Ambac UK’s license in 2010 such that 
the PRA must specifically approve (“non-objection”) any transfer 
of value and/or assets from Ambac UK to Ambac Assurance or any 
other Ambac  group  company,  other  than  in  respect  of  certain 
disclosed contracts between the two parties (such as in respect of 
a management services agreement between Ambac Assurance and 
Ambac UK).

Pursuant to the Settlement Agreement, Ambac Assurance may not 
make any “Restricted Payment” (which includes dividends from 

Ambac  Assurance  to  Ambac)  in  excess  of  $5  million  in  the 
aggregate per annum, other than Restricted Payments from Ambac 
Assurance to Ambac in an amount up to $7.5 million per annum 
solely  to  pay  operating  expenses  of  Ambac.  Concurrent  with 
making any such Restricted Payment, a pro rata amount of Ambac 
Assurance's surplus notes (other than junior surplus notes) would 
also need to be redeemed at par. 

The Stipulation and Order requires OCI approval for the payment 
of any dividend or distribution on the common stock of Ambac 
Assurance.

Under the terms of Ambac Assurance’s Auction Market Preferred 
Shares (“AMPS”), dividends may not be paid on the common stock 
of Ambac Assurance unless all accrued and unpaid dividends on 
the AMPS for the then current dividend period have been paid, 
provided, that dividends on the common stock may be made at all 
times for the purpose of, and only in such amounts as are necessary 
for, enabling Ambac (i) to service its indebtedness for borrowed 
money as such payments become due or (ii) to pay its operating 
expenses. If dividends are paid on the common stock as provided 
in the prior sentence, dividends on the AMPS become cumulative 
until the date that all accumulated and unpaid dividends have been 
paid on the AMPS.

INVESTMENTS AND INVESTMENT POLICY

As of December 31, 2017, the consolidated non-VIE investments 
of Ambac  had  an  aggregate  fair  value  of  approximately  $5.74 
billion.  Investments  are  managed  both  internally  by  officers  of 
Ambac, who are experienced investment managers and by external 
investment managers. All investments are made in accordance with 
the  general  objectives,  policies,  and  guidelines  for  investments 
reviewed  or  overseen  by  Ambac  Assurance  and  Ambac  UK’s 
respective  Boards  of  Directors.    These  policies  and  guidelines  
include  liquidity,  credit  quality,  diversification  and  duration 
objectives  and  are  periodically  reviewed  and  revised  as 
appropriate.  Additionally,  senior  credit  personnel  monitor  the 
portfolio  on  a  continuous  basis.  Credit  monitoring  of  the 
investment portfolio includes procedures on residential mortgage-
backed securities consistent with those utilized to assess the risk 
of our insured RMBS exposures. 

As  of  December 31,  2017,  the Ambac Assurance  and  Everspan 
non-VIE  investment  portfolio  had  an  aggregate  fair  value  of 
approximately $4.86 billion. Ambac Assurance’s and Everspan’s 
investment objectives are to achieve the highest risk-adjusted after-
tax  return  on  a  diversified  portfolio  consistent  with  Ambac 
Assurance’s and Everspan’s risk tolerance while employing active 
asset/liability management practices to satisfy all operating and 
strategic liquidity needs. In addition to internal investment policies 
and guidelines, Ambac Assurance’s investment portfolio is subject 
to  limits  on  the  types  and  quality  of  investments  imposed  by 
applicable insurance laws and regulations, which may be waived 
by  the  applicable  regulatory  authority  in  certain  instances. The 
Board of Directors of Ambac Assurance approves any changes to 
Ambac  Assurance's  investment  policy. 
  Ambac  Assurance 
purchases Ambac Assurance insured securities given their relative 
risk/reward characteristics. As described in Note 1. Background 
and Business Description to the Consolidated Financial Statements 
included in Part II, Item 8 in this Form 10-K, changes to Ambac 
Assurance’s investment policies are subject to approval by OCI 
pursuant to covenants made by Ambac Assurance in the Settlement 

| Ambac Financial Group, Inc.   9   2017 FORM 10-K |

Agreement and Stipulation and Order. Such requirements could 
adversely impact the performance of the investment portfolio. 

As  of  December 31,  2017,  the  non-VIE Ambac  UK  investment 
portfolio  had  an  aggregate  fair  value  of  approximately  $0.70 
billion.  Ambac  UK’s  investment  policy  is  designed  with  the 
primary objective of ensuring that Ambac UK is able to meet its 
financial obligations as they fall due, in particular with respect to 
policy holder claims. Ambac UK purchases Ambac UK insured 
securities given their relative risk/reward characteristics. Ambac 
UK’s  investment  portfolio  is  subject  to  internal  investment 
guidelines and may be subject to limits on types and quality of 
investments imposed by its regulator. The Board of Directors of 
Ambac UK approves any changes or exceptions to Ambac UK’s 
investment policy. 

As of December 31, 2017, the non-VIE Ambac (parent company 
only)  investment  portfolio  had  an  aggregate  fair  value  of 
approximately $0.16 billion. The primary investment objective is 
to preserve capital for strategic uses while maximizing income.  
The  investment  portfolio  is  subject  to  internal  investment 
guidelines.    Such  guidelines  set  forth  minimum  credit  rating 
requirements and credit risk concentration limits.  Additionally, as 
of December 31, 2017, this portfolio has $0.20 billion in surplus 
notes  that  were  issued  by Ambac Assurance  or  the  Segregated 
Account which are eliminated in consolidation.

The following table provide certain information  concerning  the 
consolidated investments of Ambac: 

2017

2016

Investment Category
($ in millions)
December 31,

Carrying
Value (2)

Weighted
Average
Yield (1)

Carrying
Value (2)

Weighted
Average
Yield (1)

Municipal obligations

$

Corporate securities

Foreign obligations

U.S. government
obligations

U.S. agency obligations

Residential mortgage-
backed securities

Asset-backed securities

Total long-term 
investments

Short-term investments

Other investments (3)

780

860

27

85

—

2,251

649

4,652

657

432

5.5 % $

374

3.2 %

1.0 %

1.6 %

— %

14.1 %

7.3 %

9.3 %

1.3 %

— %

1,802

43

101

4

2,352

943

5,619

431

450

Total

$ 5,741

8.3% $ 6,500

3.9 %

2.8 %

1.2 %

1.2 %

0.6 %

9.1 %

4.5 %

5.7 %

0.6 %

— %

5.4%

(1)  Yields are stated on a pre-tax basis, based on average amortized cost 

for both long and short term investments. 

(2) 

Includes investments guaranteed by Ambac Assurance and Ambac 
UK.  Refer  to  Note  10.  Investments  of  the  Consolidated  Financial 
Statements included in Part II, Item 8 in this Form 10-K for further 
discussion  of  Ambac  insured  securities  held  in  the  investment 
portfolio. 

(3)  Other investments include equity interests in pooled investment funds 
which are classified as trading securities and Ambac's interests in an 
unconsolidated trust created in connection with its sale of Segregated 
Account junior surplus notes on August 28, 2014.

Ambac's exposure to RMBS in its investment portfolios is further 
discussed  in  Part  II,  Item 7  “Management’s  Discussion  and 
Analysis  of  Financial  Condition  and  Results  of  Operations  — 
Balance Sheet” section below for a discussion of the fair value of 
mortgage and asset-backed securities by classification.

EMPLOYEES

As of December 31, 2017, Ambac had 113 employees in the United 
States and 11 employees in the UK. Ambac considers its employee 
relations to be satisfactory. 

Item 1A.  Risk Factors

References in the risk factors to “Ambac” are to Ambac Financial 
Group, Inc. References to “we,” “our,” “us” and “Company” are 
to Ambac and its subsidiaries, as the context requires. Capitalized 
terms used but not defined in this section shall have the meanings 
ascribed thereto in Part I, Item 1 in this Form 10-K or in Note 1. 
Background and Business Description or Note 14. Income Taxes
to the Consolidated Financial Statements included in Part II, Item 8 
in this Form 10-K unless otherwise indicated. 

Certain of the risk factors described below refer to Secured Notes 
and Tier 2 Notes, which were issued in February 2018 in connection 
with the transactions described in Note 1. Background and Business 
Description and Note 17. Subsequent Events to the Consolidated 
Financial Statements included in Part II, Item 8 in this Form 10-
K.  Our risk factors are organized in the following sections.

Risks Related to Ambac Common Shares ....................
Risks Related to Insured Portfolio Losses ...................
Risks Related to Indebtedness......................................
Risks Related to Capital, Liquidity and Markets .........
Risks Related to the Company's Business....................
Risks Related to International Business ......................
Risks Related to Taxation.............................................
Changes in Political or Economic Conditions ............
Risks Related to Strategic Plan....................................

10

12

15

20

22

23

25

25

26

Risks Related to Ambac Common Shares

Investments  in Ambac's  common  stock  are  highly  speculative 
and the price per share of Ambac's common stock may be subject 
to a high degree of volatility, including significant price declines.

Ambac's  common  stock,  which  was  issued  pursuant  to  its 
Reorganization  Plan,  began  trading  on  the  NASDAQ  Global 
Market on May 1, 2013. Although Ambac's common stock is listed 
on NASDAQ, there can be no assurance as to the liquidity of the 
trading market or the price at which such shares can be sold.  The 
price  of  the  shares  may  decline  substantially  in  response  to  a 
number of events or circumstances, including but not limited to:

•  adverse developments in our financial condition or results of 

operations;

•  changes  in  the  actual  or  perceived  risk  within  our  insured 
portfolio, particularly with regards to concentrations of credit 
risk, such as to Puerto Rico;

•  changes to regulatory status;

| Ambac Financial Group, Inc.   10   2017 FORM 10-K |

•  changes in investors’ or analysts’ valuation measures for our 

stock;

•  market trends unrelated to our stock;

•  market and industry perception of our success, or lack thereof, 

in pursuing our business strategy; and

•  results and actions of other participants in our industry.

In addition, the price of Ambac's shares may be affected by the 
additional risks described below, including risks associated with 
Ambac Assurance’s ability to deliver value to Ambac.  Investments 
in Ambac's common stock should be considered highly speculative 
and may be subject to a high degree of volatility.

Ambac may not be able to realize value from Ambac Assurance 
or generate earnings apart from Ambac Assurance.

The value of Ambac's stock is dependent upon the residual value 
of its main operating subsidiary, Ambac Assurance; the receipt of 
payments  to  be  made  by  Ambac  Assurance  pursuant  to  the 
Amended TSA and the intercompany Cost Allocation Agreement; 
the receipt of payments on the Owner Trust Certificate issued to 
Ambac  by  Corolla  Trust  (the  "Owner  Trust  Certificate");  the 
receipt of payments on investments made on securities issued or 
insured by Ambac Assurance; the receipt of dividends from Ambac 
Assurance;  and  the  receipt  of  payments  on  other  investments. 
There  can  be  no  assurance  that Ambac  will  be  able  to  realize 
residual  value  in Ambac Assurance,  which  is  in  run-off.    It  is 
unclear whether Ambac Assurance will be able to satisfy all of its 
obligations to policyholders, holders of its surplus notes (including 
junior  surplus  notes)  and  holders  of  its  preferred  stock,  even  if 
Ambac  Assurance  is  successful  in  achieving  recoveries  and 
mitigating losses. Our ability to achieve recoveries and mitigate 
losses is subject to significant risks and uncertainties, including as 
a result of varying potential perceptions of the value of Ambac 
Assurance’s guarantees and securities.

Due to the above considerations, as well as applicable legal and 
contractual  restrictions  described  elsewhere  herein,  it  is  highly 
unlikely  that Ambac Assurance  will  be  able  to  pay Ambac  any 
dividends for the foreseeable future. Furthermore, the payments to 
be made to Ambac under the Amended TSA and the intercompany 
Cost Allocation Agreement are subject to contingencies that are 
difficult to predict, making the amount and timing, if any, of such 
payments  uncertain.  Payments  to  be  made  under  the Amended 
TSA,  in  particular,  depend  on  the  generation  of  future  taxable 
income  by Ambac Assurance  above  certain  thresholds. Ambac 
Assurance’s  ability  to  generate  taxable  income  above  such 
thresholds  is  uncertain.  Due  to  these  factors,  there  can  be  no 
assurance as to the amounts that Ambac will receive from Ambac 
Assurance  under  the  Amended  TSA.    Moreover,  the  Cost 
Allocation  Agreement  provides 
that  Ambac  Assurance's 
reimbursement of Ambac's operating expenses after 2017 is subject 
to the approval of OCI and limited to $4.0 million per annum.  We 
can  provide  no  assurance  as  to  whether  OCI  will  approve  such 
reimbursement or any portion thereof.

It is also uncertain whether and to what extent Ambac will realize 
value  from  the  Owner  Trust  Certificate.  The  Owner  Trust 
Certificate  is  subordinated  to  $299.2  million  of  senior  secured 
notes issued by Corolla Trust.  Such notes and the Owner Trust 
Certificate are collateralized by and payable solely from a $350.0 

million  face  amount  junior  surplus  note  plus  interest  thereon. 
Ambac Assurance  became  the  obligor  under  the  junior  surplus 
notes on February 12, 2018 pursuant to the Second Amended Plan 
of Rehabilitation. No payment of interest on or principal of a junior 
surplus note may be made until all existing and future indebtedness 
of  Ambac  Assurance,  including  senior  ranking  surplus  notes, 
policy claims and claims having statutory priority, have been paid 
in full. All payments of principal and interest on junior surplus 
notes are subject to the prior approval of OCI. If OCI does not 
approve  the  payment  of  interest  on  junior  surplus  notes,  such 
interest will accrue and compound annually until paid. Payments 
on the senior secured notes issued by Corolla Trust will only be 
made  when  and  to  the  extent  that  Ambac  Assurance  makes 
payments on the junior surplus note held by Corolla Trust. The 
senior secured notes must be paid in full before any payments will 
be made on the Owner Trust Certificate. If Corolla Trust has failed 
to pay all interest and principal outstanding on the senior secured 
notes within three business days of August 28, 2039, the senior 
secured noteholders may also take possession of and sell the junior 
surplus note.   If such a sale were to occur, it is uncertain whether 
and to what extent there would be any value for the Owner Trust 
Certificate after satisfaction of the senior secured notes.

The value of Ambac's common stock may also depend upon the 
ability  of  Ambac  to  generate  earnings  apart  from  Ambac 
Assurance.  As  noted  below,  Ambac  is  selectively  exploring 
potential  business  opportunities  that,  among  other  things,  may 
permit utilization of Ambac’s net operating loss carry-forwards, 
but there are no assurances regarding its ability to find or execute 
such  business  opportunities  or  the  prospects  of  any  such 
opportunities.

Future offerings of debt or equity securities that rank senior or 
pari-passu to Ambac's common stock may adversely affect the 
market price of its common stock.

If Ambac decides to issue debt or additional equity securities in 
the future that rank senior or pari-passu to its common stock, it is 
likely that they will be governed by an indenture or other instrument 
containing  covenants  restricting  Ambac's  operating  flexibility. 
Additionally, any convertible or exchangeable securities issued in 
the  future  may  have  rights,  preferences  and  privileges  more 
favorable than those of common stock and may result in dilution 
to owners of common stock. Because Ambac's decision to issue 
debt  or  equity  securities  in  any  future  offering  will  depend  on 
market conditions, it cannot predict or estimate the amount, timing 
or nature of future offerings. Holders of common stock bear the 
risk  of  future  offerings  reducing  the  market  price  of Ambac's 
common stock and diluting the value of their stock holdings in the 
Company.

The  issuance  of  new  common  stock  may  dilute  current 
shareholder value or have adverse effects on the market price of 
Ambac's common stock.

If Ambac raises capital through the issuance of additional shares 
of common stock, whether for select business transactions, general 
corporate purposes, or in exchange for other securities, the value 
of  current shareholders’ interests may be diluted as Ambac is not 
required  to  offer  any  such  shares  to  existing  stockholders  on  a 
preemptive basis.

Ambac  cannot  predict  the  effect,  if  any,  of  future  sales  of  its 
common stock, or the availability of shares for future sales, on the 

| Ambac Financial Group, Inc.   11   2017 FORM 10-K |

market price of its common stock. Sales of substantial amounts of 
common stock or the perception that such sales could occur may 
adversely affect the prevailing market price for its common stock.

The occurrence of certain events could result in the initiation of 
rehabilitation  proceedings  against  Ambac  Assurance,  with 
resulting adverse consequences to holders of our securities.

Increased  loss  development  in  the  insured  portfolio  of Ambac 
Assurance  or  significant  losses  or  other  events  resulting  from 
litigation against Ambac Assurance may prompt OCI to determine 
that  it  is  in  the  best  interests  of  policyholders  to  initiate 
rehabilitation proceedings with respect to Ambac Assurance, either 
preemptively or in response to any such event.

A  group  of  entities  allowed  to  participate  in  the  confirmation 
hearings for the Second Amended Plan of Rehabilitation for the 
Segregated Account has indicated that it would appeal the order 
approving the Second Amended Plan.  We can provide no assurance 
that an appeal of the approval order will not be successful and result 
in the approval order being overturned or modified, or necessitate 
changes to the Second Amended Plan.  Ambac, Ambac Assurance 
and  their  respective  security  holders  would  face  substantial 
uncertainty  and  risk  if  the  appeal  is  successful.   Among  other 
possibilities,  Ambac  Assurance  may  lose  control  rights  in 
transactions, which would expose the Company to significantly 
increased risks and potential losses.

Even  if  the  Second Amended  Plan  of  Rehabilitation  and/or  the 
related approval order of the Rehabilitation Court is not modified 
or overturned, there can be no assurance that any level of capital 
deemed  sufficient  by  OCI  to  permit  the  conclusion  of  the 
Segregated Account rehabilitation will be sufficient to cover all 
future losses, whether currently anticipated or unanticipated.

If, as a result of the occurrence of any such event(s), OCI decides 
to  initiate  rehabilitation  proceedings  with  respect  to  Ambac 
Assurance, adverse consequences may result, including, without 
limitation and absent enforceable protective injunctive relief, the 
assertion of damages by counterparties (including mark-to-market 
claims  with  respect  to  insured  transactions  executed  in  ISDA 
format),  the  acceleration  of  losses  based  on  early  termination 
triggers and the loss of control rights in insured transactions. Any 
such  consequences  may  reduce  the  residual  value  of  Ambac 
Assurance. Additionally, the rehabilitator would assume control of 
all  of  Ambac  Assurance’s  assets  and  management  of  Ambac 
Assurance. In exercising control, the rehabilitator would act for 
the benefit of policyholders, and would not take into account the 
interests of our securityholders. Such actions may result in material 
adverse consequences for our securityholders.

Risks Related to Insured Portfolio Losses

Loss  reserves  may  not  be  adequate  to  cover  potential  losses; 
changes in loss reserves may result in further volatility of net 
income and comprehensive income.

Loss  reserves  are  established  when  management  has  observed 
credit deterioration, in most cases, when the underlying credit is 
considered  adversely  classified.  Loss  reserves  established  with 
respect to our non-derivative financial guarantee insurance policies 
are based upon estimates and judgments by management, including 
estimates and judgments with respect to the probability of default, 
the severity of loss upon default, management’s ability to execute 
policy commutations, and estimated remediation recoveries for, 

among other things, breaches by RMBS issuers of representations 
and warranties. The objective of establishing loss reserve estimates 
is not to, and our loss reserves do not, reflect the worst possible 
outcome. While our reserving scenarios reflect a wide range of 
possible outcomes (on a probability weighted basis) reflecting the 
significant  uncertainty  regarding  future  developments  and 
outcomes, our loss reserves may change materially based on future 
developments. As a result of inherent uncertainties in the estimates 
and judgments made to determine loss reserves, there can be no 
assurance that either the actual losses in our financial guarantee 
insurance  portfolio  will  not  exceed  such  reserves  or  that  our 
reserves  will  not  increase  or  decrease  materially  over  time  as 
circumstances, our assumptions, or our models change.

Additionally,  inherent  in  our  estimates  of  loss  severities  and 
remediation recoveries is the assumption that Ambac Assurance 
will  retain  control  rights  in  respect  of  our  insured  portfolio. 
However,  according  to  the  terms  of  relevant  transaction 
documents, Ambac Assurance  may  lose  control  rights  in  many 
insured transactions if, among other things, Ambac Assurance is 
the  subject  of  delinquency  proceedings  and/or  other  regulatory 
actions which could result from its deteriorated financial position. 
If Ambac Assurance loses control rights, its ability to mitigate loss 
severities and realize remediation recoveries will be compromised, 
and  actual  ultimate  losses  in  its  insured  portfolio  could  exceed 
current loss reserves.  The Second Amended Plan of Rehabilitation 
of the Segregated Account and related orders of the Rehabilitation 
Court seek to restrain actions adverse to Ambac Assurance based 
on a loss of control rights due to the rehabilitation of the Segregated 
Account  or  related  events  or  circumstances.  If  the  Second 
Amended  Plan  of  Rehabilitation  and  such  orders  do  not 
successfully preclude such actions, Ambac Assurance could lose 
its control rights with respect to certain policies.

Some  issuers  of  public  finance  obligations  insured  by Ambac 
Assurance  are  experiencing fiscal  stress  that  could  result  in 
increased  losses  on  those  obligations  or  increased  liquidity 
claims,  including  losses  or  claims  resulting  from  payment 
defaults,  Chapter  9  bankruptcy  or  other  restructuring 
proceedings or loss of market access.

Some  issuers  of  public  finance  obligations  insured  by Ambac 
Assurance  have  reported  or  may  report  budget  shortfalls, 
significantly  underfunded  pensions  or  other  fiscal  stresses  that 
imperil  their  ability  to  pay  debt  service  or  will  require  them  to 
significantly raise taxes and/or cut spending in order to satisfy their 
obligations. Government entities may also take other actions that 
may impact their own creditworthiness or the creditworthiness of 
related  issuers.  Some  issuers  of  obligations  insured  by Ambac 
Assurance have declared a payment moratorium, defaulted or filed 
for  bankruptcy  or  similar  debt  adjustment  proceedings,  raising 
concerns about their ultimate ability to service the debt insured by 
Ambac Assurance and Ambac Assurance's ability to recover claims 
paid in the future. If the issuers of the obligations in the public 
finance portfolio are unable to raise taxes, cut spending, or receive 
federal  or  state  assistance,  or  if  such  issuers  default  or  file  for 
bankruptcy under Chapter 9 or for similar relief under other laws 
that  allow  for  the  adjustment  of  debts, Ambac Assurance  may 
experience  liquidity  claims  and/or  ultimate  losses  on  those 
obligations, which could adversely affect the Company's business, 
financial condition and results of operations.

| Ambac Financial Group, Inc.   12   2017 FORM 10-K |

Ambac  Assurance  insures  obligations  of  Commonwealth  of 
Puerto Rico, including its authorities and public corporations, 
that  are  either  subject  to  a  Title  III  bankruptcy  protection 
proceeding under the Puerto Rico Oversight, Management and 
Stability Act ("PROMESA") or have otherwise suspended debt 
service payments. Ambac Assurance may be required to make 
significant  amounts  of  policy  payments  over  the  next  several 
years, the recoverability of which is subject to great uncertainty, 
which may lead to material permanent losses.   While we believe 
our  reserves  are  adequate  to  cover  losses  in  the  Puerto  Rico 
insured  portfolio,  there  can  be  no  assurance  that  Ambac 
Assurance  may  not  incur  additional  losses  in  the  future, 
particularly given the developing economic, political and legal 
circumstances in Puerto Rico. Such losses may have a material 
adverse effect on Ambac Assurance's results of operation and 
financial condition.

Ambac Assurance has exposure to the Commonwealth of Puerto 
Rico (the "Commonwealth"), including its authorities and public 
corporations. Each has its own credit risk profile attributable to 
discrete  revenue  sources,  direct  general  obligation  pledges  and 
general  obligation  guarantees.  Overall, Ambac Assurance    has 
approximately  $2.0  billion  of  net  par  exposure 
the 
Commonwealth and these instrumentalities. Components of the 
overall Puerto Rico net par outstanding include capital appreciation 
bonds that are reported at the par amount at the time of issuance 
of the related insurance policy as opposed to the current accreted 
value of the bond.  The outstanding net insured amount including 
accretion  on  capital  appreciation  bonds  is  approximately  $2.7 
billion.  Total net insured lifetime debt service (net par and interest) 
to the Commonwealth of Puerto Rico and its instrumentalities was 
approximately $9.5 billion at December 31, 2017. 

to 

As a result of the developments described in these Risk Factors 
and  elsewhere  in  this  10-K  (see  Part  II,  Item  7,  Management's 
Discussion  and Analysis  of  Financial  Condition  and  Results  of 
Operations - Financial Guarantees in Force), the Commonwealth 
of Puerto Rico and certain of its instrumentalities will continue to 
default  on  debt  service  payments,  including  payments  owed  on 
bonds  insured  by Ambac Assurance. Ambac Assurance  may  be 
required to make significant amounts of policy payments over the 
next several years, the recoverability of which is subject to great 
uncertainty,  which  may  lead  to  material  permanent  losses.  Our 
exposure  to  Puerto  Rico  is  impacted  by  the  amount  of  monies 
available for debt service, which is in turn affected by variability 
in economic growth, tax revenues, essential services expense as 
well as federal funding of Commonwealth needs. In addition, our 
exposure to Puerto Rico is impacted by the significant damage to 
the Commonwealth that was inflicted by Hurricane Maria, which 
made landfall on September 20, 2017,  as well as Hurricane Irma, 
which passed just north of the island on September 6, 2017. The 
longer term recovery of the economy of the Commonwealth and 
its essential infrastructure will likely be highly dependent on the 
amount, timing and effectiveness of Federal aid.  There is historical 
precedent for meaningful Federal support following other natural 
disasters in the United States and its territories and, to date, some 
Federal aid measures have been approved and have already started 
to assist in the recovery. However, there can be no assurances as 
to  the  sufficiency  or  ultimate  level  of  the  aid  and  as  to  the 
effectiveness of the deployment of the aid in benefiting the long 
term recovery of economic activity in Puerto Rico.  

Substantial  uncertainty  also  exists  with  respect  to  the  ultimate 
outcome for creditors in Puerto Rico due to legislation enacted by 
the Commonwealth and the United States, including PROMESA, 
as well as actions taken in reliance on such laws, including Title 
III filings.  Ambac Assurance is involved in multiple litigations 
relating to such actions and other issues and may not be successful 
in pursuing claims or protecting its interests.  Ambac Assurance is 
also participating in a mediation process with respect to potential 
debt restructurings.  Mediation may not be productive or may not 
resolve  Ambac  Assurance's  claims  in  a  manner  that  avoids 
significant losses.

Given  the  numerous  uncertainties  existing  with  respect  to  the 
restructuring process and relevant litigations, no assurance can be 
given that ultimate debt service discounts will not be severe and 
cause Ambac  to  experience  losses  materially  exceeding  current 
reserves. It is possible that certain restructuring process solutions, 
together  with  associated  legislation,  budgetary,  and/or  public 
policy  proposals  could  be  adopted  and  could  significantly  or 
further impair our exposures. In addition, there are  possible final 
legal  determinations,  including  failing  to  recognize  or  properly 
differentiate  legal  structures  and  protections  applicable  to  such 
exposures, that could result in losses exceeding our current reserves 
by  a  material  amount  and  our  loss  reserves  would  need  to  be 
increased.  In  particular,  in  a  Title  III  process,  should  court-
approved plans of adjustment for the Commonwealth, COFINA, 
Puerto Rico Highways and Transportation Authority ("PRHTA"), 
or any other issuers of Ambac-insured debt that file for Title III 
protection  contemplate  discounts  to  debt  service  implied  by,  or 
even  worse  than,  the  Commonwealth’s  Revised  Fiscal  and 
Economic  Growth  Plan  ("Revised  FEGP"),  the  Fiscal  Plan 
Compliance  Act  be  upheld,  or  Ambac  receive  unfavorable 
judgments in the litigations to which it is a party, Ambac’s financial 
condition could be materially adversely affected. It is also possible 
that economic or demographic outcomes may be as, or worse than, 
forecast  under  the  Commonwealth’s  Revised  FEGP  or  under 
proposals  or  plans  promulgated  by  the  Commonwealth  or  its 
instrumentalities  in  or  in  connection  with  a Title  III  process  or 
otherwise. Even a negotiated restructuring to which Ambac agrees 
as  part  of  a  Title  VI,  mediation  or  other  process  may  involve 
material losses in excess of current reserves. While our reserving 
scenarios reflect a wide range of possible outcomes reflecting the 
significant  uncertainty  regarding  future  developments  and 
outcomes, given our exposure to Puerto Rico and the economic, 
fiscal, legal and political uncertainties associated therewith as well 
as  the  uncertainties  emanating  from  the  damage  caused  by 
hurricanes Maria and Irma, our loss reserves may ultimately prove 
to  be  insufficient  to  cover  our  losses,  potentially  by  a  material 
amount, and may be subject to material volatility.

Implementation of the H.R. 1 (commonly known as the Tax Cuts 
and Jobs Act) may negatively impact the economic recovery of 
Puerto Rico, which could result in higher loss severities or an 
extended moratorium on debt service owed on Ambac Assurance-
insured bonds of Puerto Rico and its instrumentalities.

The Tax Cuts and Jobs Act effectively treats Puerto Rico the same 
as it does any other foreign tax jurisdiction and otherwise makes 
it  less  attractive  for  U.S.  taxpayers  to  move  certain  operations 
abroad by, among other things, imposing U.S. federal income tax 
on a current basis with respect to certain earnings of controlled 
foreign corporations.  This may diminish the Commonwealth of 
Puerto  Rico’s  relative  attractiveness  as  a  location  for  foreign 

| Ambac Financial Group, Inc.   13   2017 FORM 10-K |

activity  of  a  U.S.  multinational  group,  including  those  with 
manufacturing  facilities  or  other  business  on  the  island.  The 
legislation  comes  at  a  difficult  time  as  the  Commonwealth  of 
Puerto Rico recovers from hurricanes Maria and Irma and a multi-
year financial crisis. Consequently, the Tax Cuts and Jobs Act could 
have  an  adverse  impact  on  the  ongoing  recovery  of  the 
Commonwealth  of  Puerto  Rico  by  impeding  much-needed 
economic  growth,  job  growth,  and  revenue  generation,  which 
could potentially result in higher loss severities and/or an extended 
debt service moratorium for Puerto Rico creditors, including the 
Company.

Implementation  of  the  Tax  Cuts  and  Jobs  Act  could  have  a 
negative  impact  on  issuers  of  Ambac  Assurance-insured 
municipal bonds.

Under the Tax Cuts and Jobs Act individuals who itemize their 
deductions on their Federal income tax returns will be limited to 
$10,000 of deductions for state and local taxes paid in a given year. 
In  states  with  high  income  tax  rates,  such  as  New  York, 
Connecticut, New Jersey, Maryland, and California, there is a risk 
that  municipal  bond  issuers  could  be  impacted  by  lower  tax 
revenues if there is significant out migration by residents to states 
or municipalities with lower tax rates. Lower tax revenues in these 
jurisdictions  could  lead  to  reduced  financial  flexibility,  lower 
overall  economic  activity  and  increased  credit  risk  and  thereby 
potentially  increasing  risk  to Ambac Assurance  with  respect  to 
affected issuers with bonds insured by Ambac Assurance.

the  demand  for  municipal  bond 

In  addition,  the  Tax  Cuts  and  Jobs Act  reduces  the  maximum 
corporate federal income tax rate to 21% from 35%, which could 
investments  by 
reduce 
corporations, such as life insurance companies, banks, and credit 
unions, which currently hold approximately 30% of all outstanding 
municipal bonds.  The impact of reduced demand could result in 
higher  borrowing  costs  for  municipalities  and/or  reduced 
refinancing  flexibility  for  issuers  of  municipal  bonds,  thereby 
potentially  increasing  risk  to Ambac Assurance  with  respect  to 
issuers with municipal bonds insured by Ambac Assurance.

We  are  subject  to  credit  risk  and  other  risks  in  our  insured 
portfolio, including related to RMBS and securities backed by 
student loans. We are also subject to risks associated with adverse 
selection as our insured portfolio runs off. Measures taken to 
reduce such risks may have an adverse effect on the Company's 
operating results or financial position.

Performance of our insured transactions, including (but not limited 
to) RMBS transactions and those involving securities backed by 
student  loans,  can  be  adversely  affected  by  general  economic 
conditions,  such  as  recession,  rising  unemployment  rates, 
underemployment, home prices that decline or do not increase in 
the patterns assumed in our models, increasing foreclosure rates 
and unavailability of consumer credit, mortgage product attributes, 
such as interest rate adjustments and balloon payment obligations, 
borrower  and/or  originator  fraud,  mortgage  and  student  loan 
servicer performance or underperformance and financial difficulty, 
such as risks related to whether the servicer may be required to 
delay the remittance of any cash collections held by it or received 
by it after the time it becomes subject to bankruptcy or insolvency 
proceedings.

While further deterioration in the performance of consumer assets, 
including mortgage-related assets and student loans, may occur, 

the timing, extent and duration of any future deterioration of the 
credit  markets  is  unknown,  as  is  the  impact  on  potential  claim 
payments and ultimate losses on the securities within our portfolio. 
In addition, there can be no assurance that any governmental or 
private  sector  initiatives  designed  to  address  such  credit 
deterioration in the markets will be successful or inure to the benefit 
of the transactions we insure. For example, any initiative which 
permits  the  discharge  of  student  loan  debt  in  bankruptcy  may 
adversely affect our portfolio. Similarly, servicer settlements with 
governmental  authorities  regarding  foreclosure  or  servicing 
irregularities are generally designed to protect borrowers and may 
increase losses on securities we insure. In particular, the student 
loan  industry  and,  specifically,  trusts  with  securities  insured  by 
Ambac  Assurance  have  been  subject  to  heightened  Consumer 
Finance  Protection  Bureau  (CFPB)  scrutiny  and  enforcement 
action over servicing and collections practices and potential chain 
of title issues and, consequently, any settlements, orders, consents 
or penalties resulting from CFPB actions, or any failure on the part 
of  servicers  or  other  parties  asserting  claims  against  delinquent 
borrowers to establish title to the loans, could lead to increased 
losses on securities we insure.

In addition, there can be no assurance that Ambac Assurance would 
be  successful,  or  that  it  would  not  be  delayed,  in  enforcing  the 
subordination provisions, credit enhancements or other contractual 
provisions of the RMBS that Ambac Assurance insures.

As the runoff of the insured portfolio continues, the proportion of 
exposures  we  rate  as  below  investment  grade  relative  to  the 
aggregate insured portfolio is likely to continue to increase, leaving 
the portfolio increasingly concentrated in higher risk exposures.  
This risk may result in greater volatility or have adverse effects on 
the  Company's  results  from  operations  and  on  our  financial 
condition.

One of our primary goals is to create shareholder value through 
transaction  terminations,  policy  commutations,  settlements  and 
restructurings that we believe will improve our risk profile.  As we 
take such actions to reduce known and potential risks, such actions 
may negatively impact our operating results or financial position 
in one or more reporting periods.

Our  credit  risk  management  policies  and  practices  may  not 
adequately identify significant risks.

As described in Part I, Item 1, “Risk Management” in this Form 
10-K, we have established risk management policies and practices 
which seek to mitigate our exposure to credit risk in our insured 
portfolio.  Ongoing  surveillance  of  credit  risks  in  our  insured 
portfolio  is  an  important  component  of  our  risk  management 
process. These policies and practices in the past have not insulated 
us from risks that were unforeseen and which had unanticipated 
loss severity, and such policies and practices may not do so in the 
future. There can be no assurance that these policies and practices 
will be adequate to avoid future losses. If we are not able to identify 
significant risks, we may not be able to timely remediate such risks, 
thereby increasing the amount of losses to which we are exposed. 
An inability to identify significant risks could also result in the 
failure to establish loss reserves that are sufficient in relation to 
such risks.

We use analytical models to assist our projection of performance 
of our insured obligations and our investment portfolio but actual 

| Ambac Financial Group, Inc.   14   2017 FORM 10-K |

results could differ materially from the model outputs and related 
analyses.

We rely on internally and externally developed complex financial 
models, including default models related to RMBS and waterfall 
modeling provided by a nationally recognized vendor for RMBS 
and student loan exposures, to project performance of our insured 
obligations  and  similar  securities  in  our  investment  portfolio. 
These models assume various conditions, probability scenarios, 
facts and circumstances, and there can be no assurance that such 
models accurately predict or measure the quantum of losses, loss 
reserves and timing of losses. Differences in the models that  we 
employ, and/or uncertainties and/or flaws in these financial models 
and/or faulty assumptions inherent in these financial models and 
those determined by management, could lead to material changes 
in  projected  outcomes,  and  could  include  increased  losses,  loss 
reserves  and/or  other  than  temporary  investment  impairments. 
Moreover, modeled estimates of transaction performance depend 
in part on the interpretation of contracts and other bases of  our 
legal  rights.  Such  interpretations  may  prove  to  be  incorrect  or 
different interpretations may be employed by bond trustees and 
other transaction participants and, ultimately courts, which could 
lead  to  increased  losses,  loss  reserves  and/or  investment 
impairments.

Potential  outcome  of  litigation  relating  to  certain  military 
housing credit exposures could adversely affect Ambac.

Ambac Assurance is a party to a number of litigations relating to 
military  housing  securitization  credits,  where  opposing  parties 
contend that, among other things, Ambac Assurance has lost its 
control rights due to the existence of an “Ambac Default” caused 
by,  among  other  things,  the  recently  concluded  Segregated 
Account rehabilitation.  If Ambac Assurance is found to have lost 
control rights in these transactions, our ability to mitigate losses 
could be significantly compromised, and actual ultimate losses in 
these military housing transactions could exceed our current loss 
reserves. Moreover, an adverse outcome relating to the assertion 
of an “Ambac Default” could prompt other counterparties to make 
similar assertions, which would increase the risk of losing control 
rights in other transactions.

Risks Related to Indebtedness

The Secured Notes and Tier 2 Notes are secured primarily by 
potential recoveries on Ambac Assurance’s RMBS litigations and 
Ambac  Assurance’s  ability  to  obtain,  and  the  timing  of,  any 
recovery  on  the  RMBS  litigations  is  subject  to  significant 
uncertainty.

The  Secured  Notes  and  Tier  2  Notes  are  primarily  secured  by 
Ambac  Assurance’s  potential  recoveries  in  respect  of  RMBS 
litigations. The RMBS litigations arise from Ambac Assurance’s 
claims of fraud and/or contractual breaches of representations and 
warranties  with  respect  to  certain  residential  mortgage-backed 
securities (“RMBS”) transactions insured by Ambac Assurance.  
These claims are based on, among other things, representations 
with  respect  to  the  characteristics  of  the  securitized  loans,  the 
absence of borrower fraud in the underlying loan pools or other 
misconduct in the origination process, the compliance of loans with 
the prevailing underwriting policies, and compliance of the RMBS 
transaction counterparties with policies and procedures related to 
loan origination and securitization. In such cases, where contract 
claims  are  being  pursued,  the  sponsor  of  the  transaction  is 
contractually obligated to repurchase, cure or substitute collateral 

for  any  loan  that  breaches  the  representations  and  warranties. 
However,  generally  the  sponsors  have  not  honored  those 
obligations and have vigorously defended claims brought against 
them. 

The outcome of any litigation, including the RMBS litigations, is 
inherently unpredictable, including because of risks intrinsic in the 
adversarial nature of litigation. Subsequent court motions, appeals 
and  rulings,  some  of  which  could  relate  to  the  transactions 
effectuated in connection with the conclusion of the Segregated 
Account rehabilitation, and the issuance of the Secured Notes or 
Tier  2  Notes,  could  delay  or  otherwise  impact  any  recovery  by 
Ambac Assurance.    Moreover,  rulings  that  may  be  adverse  to 
Ambac Assurance (in any given RMBS litigation, as well as in 
related matters) could affect Ambac Assurance’s ability to pursue 
its  claims  or  alter  settlement  dynamics  with  RMBS  litigation 
counterparties. There can be no assurance that Ambac Assurance 
will be successful in prosecuting its claims in the RMBS litigations.

Any  litigation  award  or  settlement  amount  is  subject  to 
counterparty credit risk, successor liability and other similar risks 
of  recovery,  including  that  the  sponsor  is  unable  to  honor  its 
contractual obligations or pay a judgment that Ambac Assurance 
may  obtain  in  litigation.  Some  sponsors  against  which Ambac 
Assurance  has  claims  have  been  acquired  since  the  securitized 
loans were originated and their successors may decline to honor 
the sponsor’s obligations. Ambac Assurance may not be successful 
in enforcing its claims against any successor entity. There can be 
no  assurance  that  Ambac  Assurance  will  not  have  difficulties 
recovering any damages it may be owed or that it will recover all 
amounts  to  which  it  believes  it  is  entitled  or  that  any  actual 
recoveries  will  not  differ  materially  from 
the  estimated 
representation  and  warranty  recoveries  the  Company  has 
accounted for in its financial statements.

In addition, while a policy issued by Ambac Assurance guarantees 
all  principal  and  interest  payments  (including  mandatory 
prepayments) in respect of the Secured Notes as and when such 
payments become due and owing, such policy may not provide 
adequate  assurance  that  payments  of  principal  and  interest  in 
respect of the Secured Notes will be available in the event that 
Ambac Assurance’s financial condition, including its capital and 
liquidity, is materially adversely affected, including as a result of 
the failure to recover expected damages and, as a result, Ambac 
Assurance is unable to satisfy its policy obligations. In the event 
that Ambac Assurance is unable to satisfy its obligations under the 
Secured Notes policy, holders of the Secured Notes will have the 
right to foreclose on the securities constituting collateral for the 
Secured Notes and to sue Ambac Assurance for failure to make 
payments under the Secured Notes policy; however, there can be 
no assurance that the sale of the securities collateral will produce 
proceeds in an amount sufficient to pay any or all amounts due on 
the Secured Notes or that holders will be successful in any litigation 
seeking  payments  pursuant  to  the  Secured  Notes  policy. 
Furthermore, holders of Secured Notes will not obtain any control, 
consultation or direction rights in respect of the RMBS litigations 
nor  will  holders  be  able  to  sell  the Ambac  Note  or  the  right  to 
receive proceeds in respect of the RMBS litigations without the 
prior consent of Ambac Assurance. 

Holders of Secured Notes and Tier 2 Notes will have no authority 
to make decisions in respect of the RMBS litigations, will need 
to rely on Ambac Assurance to pursue the RMBS litigations and 

| Ambac Financial Group, Inc.   15   2017 FORM 10-K |

may  only  receive  limited  information  concerning  the  RMBS 
litigations.

All  decisions  concerning  the  conduct  of  the  RMBS  litigations, 
including as to strategy, settlement, pursuit and abandonment, will 
be  made  by  Ambac  Assurance,  in  consultation  with  its  legal 
counsel. Holders of the Secured Notes and Tier 2 Notes will have 
no control over any decisions related to the RMBS litigations and 
will need to rely on Ambac Assurance to prosecute the underlying 
claims. If holders do not agree with decisions by Ambac Assurance 
with respect to the RMBS litigations, there is no recourse or ability 
to object to such decision. Additionally, Ambac Assurance’s ability 
to disclose potentially material details of the RMBS litigations on 
a regular basis may be limited by litigation strategy and the inherent 
nature and rules of judicial proceedings, including, among other 
things, proceedings and filings that are sealed by the court, matters 
involving  attorney-client  privilege  and  proceedings  that  are 
conducted on a confidential basis by agreement of the parties. The 
RMBS  litigations  could  also  be  adversely  affected  if  Ambac 
Assurance does not have sufficient resources to actively prosecute 
its  claims  or  becomes  subject  to  rehabilitation,  liquidation, 
conservation or dissolution, or otherwise impaired by actions of 
OCI. 

While Ambac Assurance may pursue negotiated settlements of 
the  RMBS  litigations,  the  settlement  discussions  may  not 
materialize, may ultimately fail, may cause delays or may result 
in settlements for less than the amount needed to pay the Secured 
Notes and Tier 2 Notes.

Ambac Assurance may elect to engage in settlement negotiations 
with the defendants of the RMBS litigations and may decide to 
settle any or all of the RMBS litigations.  The aggregate amount 
of settlements may be for an amount less than the amount necessary 
to pay the Secured Notes or less than the amount necessary to pay 
the Tier 2 Notes, which could have a material adverse effect on its 
financial  condition  or  results  of  operations  and  make  it  more 
difficult  for Ambac  Assurance  to  repay  the  Ambac  Note  (and 
therefore make it more difficult for the issuer of the Secured Notes 
to repay the Secured Notes) and/or the Tier 2 Notes, on a timely 
basis or at all. Additionally, while Ambac Assurance may pursue 
settlement  negotiations,  there  can  be  no  assurance  that  any 
settlement  negotiations  will  materialize  or  that  any  settlement 
agreement  can  be  reached  on  terms  acceptable  to  Ambac 
Assurance, or at all. If settlement discussions prior to trial fail with 
respect to a particular case, Ambac Assurance could incur greater 
expenses preparing for, and prosecuting, a trial in such case, and 
Ambac Assurance’s recovery would be subject to the additional 
risks inherent in any trial, which could adversely impact the value 
of the Secured Notes and Tier 2 Notes.  

Ambac Assurance may receive non-cash proceeds in respect of 
the RMBS litigations and may need to liquidate such proceeds 
for less than fair market value in order to make cash payments 
on the Ambac Note and/or the Tier 2 Notes.

In connection with a settlement agreement or judgment, Ambac 
Assurance may receive non-cash proceeds or indirect proceeds, 
which are cash or non-cash proceeds received by others for the 
benefit of Ambac Assurance. Ambac Assurance, however, will be 
required to make payments on the Ambac Note, for the benefit of 
the holders of Secured Notes, and on the Tier 2 Notes, in cash. In 
the  event  that  Ambac  Assurance  receives  non-cash  proceeds, 
Ambac Assurance may need to liquidate the non-cash proceeds if 

it does not have sufficient cash available to make a payment on the 
Ambac Note or the Tier 2 Notes on the applicable payment date. 
Market and economic conditions, governmental actions, the form 
of  non-cash  proceeds  and  other  factors  may  cause  substantial 
delays in the ability to liquidate any non-cash proceeds received. 
Ambac  Assurance  may  not  be  able  to  liquidate  any  non-cash 
proceeds received for fair value or at all. If Ambac Assurance is 
unable to liquidate non-cash proceeds at their fair value, Ambac 
Assurance will still be required to make payments on the Ambac 
Note and Tier 2 Notes and any payment made that is greater than 
the amount received could have a material adverse effect on Ambac 
Assurance’s financial condition, including its capital and liquidity. 
If indirect proceeds are received, Ambac Assurance will also be 
required to make payments on the Ambac Note, for the benefit of 
the holders of Secured Notes, and on the Tier 2 Notes, in cash to 
the  extent  of  the  fair  value  to Ambac Assurance  of  the  indirect 
proceeds. Any payments of cash on the Ambac Note and/or the 
Tier 2 Notes as the result of receiving indirect proceeds may have 
a  material  adverse  effect  on  Ambac  Assurance’s  financial 
condition, including its capital and liquidity.

There may not be sufficient collateral to pay any or all of the 
Secured Notes or Tier 2 Notes.

In  addition  to  Ambac  Assurance’s  right  to  representation  and 
warranty recoveries in respect of the RMBS litigations, which is 
inherently uncertain, the Ambac Note is also secured by securities 
having  an  estimated  fair  market  value  of  approximately  $350 
million.  However, no appraisal of the value of the securities has 
been made and there can be no assurances that the fair market value 
of these securities will not decrease, including significantly.  The 
value of the collateral in the event of liquidation will depend on 
market  and  economic  conditions,  the  availability  of  buyers  and 
other  factors.  Consequently,  liquidating  the  securities  collateral 
securing the Ambac Note may not produce proceeds in an amount 
sufficient to pay any or all amounts due on the Secured Notes.

The estimated fair market value of the securities collateral securing 
the Ambac  Note  is  subject  to  fluctuations  based  on  factors  that 
include, among others, the financial condition of participants in 
the  financial  guaranty  insurance  industry,  the  market  for  and 
availability of financial guaranty insurance, the ability to sell the 
collateral  in  an  orderly  sale,  general  economic  conditions,  the 
availability of buyers and other factors.  The amount to be received 
upon  a  sale  of  the  securities  collateral  would  be  dependent  on 
numerous  factors,  including,  but  not  limited  to,  the  actual  fair 
market value of the collateral at such time and the timing and the 
manner of the sale, and the amount Ambac Assurance receives may 
not equal or exceed the expected fair market value.  Accordingly, 
there can be no assurance that the collateral can be sold in a short 
period of time or at all or at acceptable prices to Ambac Assurance. 

In the event of rehabilitation, liquidation, conservation, dissolution 
or other insolvency proceeding, Ambac Assurance cannot assure 
holders  that  the  proceeds  from  any  sale  or  liquidation  of  the 
securities collateral will be sufficient to pay any or all of Ambac 
Assurance’s obligations under the Ambac Note. 

In addition, in the event of any such proceeding, it is possible that 
the rehabilitator, trustee, or competing creditors will assert that the 
value of the collateral with respect to the Ambac Note or the Tier 
2  Notes,  including  Ambac  Assurance’s  rights  to  recoveries  in 
respect  of  the  RMBS  litigations,  is  less  than  the  then-current 

| Ambac Financial Group, Inc.   16   2017 FORM 10-K |

principal  amount  outstanding  under  the  Ambac  Note  and  the 
Secured  Notes  and/or  the  Tier  2  Notes  on  the  date  of  the 
rehabilitation filing. Upon a finding by the court overseeing an 
Ambac Assurance  rehabilitation  that  the  Ambac  Note  and  the 
Secured Notes and/or the Tier 2 Notes are under-collateralized, the 
claims in the rehabilitation proceeding with respect to the Ambac 
Note, the Secured Notes or the Tier 2 Notes may be bifurcated 
between a secured claim up to the value of the collateral and an 
unsecured claim for any deficiency. As a result, the claim of the 
holders of the Secured Notes or the Tier 2 Notes could be unsecured 
in whole or in part. The ability of the holders of the Secured Notes 
or Tier 2 Notes to realize upon any of the collateral securing the 
Ambac Note and the Secured Notes or Tier 2 Notes, as the case 
may be, may also be subject to bankruptcy and insolvency law 
limitations or similar limitations applicable in insurance company 
rehabilitation or liquidation proceedings.

Rights of holders of the Secured Notes in the RMBS litigations 
and securities collateral and rights of holders of the Tier 2 Notes 
in the RMBS litigations may be adversely affected by the failure 
to  perfect  security  interests  in  such  collateral,  and  insolvency 
considerations with respect to Ambac Assurance may have an 
adverse effect on the ability of holders of the Secured Notes and 
Tier 2 Notes to receive payments on the Secured Notes or Tier 2 
Notes, respectively.

Applicable law provides that a security interest in certain tangible 
and intangible assets can only be properly perfected and its priority 
retained through certain actions undertaken by the secured party. 
There can be no assurance that the collateral agent in respect of 
the Secured Notes or Tier 2 Notes will have taken or will take all 
actions necessary to create properly perfected security interests in 
the proceeds from the RMBS litigations, which may result in the 
loss of the priority of the security interest in favor of the holders 
of the Secured Notes or the Tier 2 Notes, respectively, to which 
they would otherwise have been entitled.  In particular, in the event 
of a rehabilitation, liquidation, conservation, dissolution or other 
insolvency  proceeding  with  respect  to Ambac Assurance,  if  the 
proceeds from the RMBS litigations received by Ambac Assurance 
are determined not to be under the control of the Secured Notes 
Issuer, a receiver or a creditor of Ambac Assurance may take the 
position that the Secured Notes Issuer’s security interest in such 
proceeds or a portion thereof is not perfected and therefore that 
such proceeds do not secure the Ambac Note. With respect to the 
Tier  2  Notes,  in  the  event  of  a  rehabilitation,  liquidation, 
conservation,  dissolution  or  other  insolvency  proceeding  with 
respect  to Ambac Assurance,  if  the  proceeds  from  the  RMBS 
litigations received by Ambac Assurance are determined not to be 
under  the  control  of  the  collateral  agent  for  the Tier  2  Notes,  a 
receiver or a creditor of Ambac Assurance may take the position 
that such collateral agent’s security interest in such proceeds or a 
portion thereof is not perfected and therefore that such proceeds 
do not secure the Tier 2 Notes. Moreover, if the proceeds from the 
RMBS 
initiation  of  a 
rehabilitation,  liquidation,  conservation,  dissolution  or  other 
insolvency  proceeding  with  respect  to  Ambac  Assurance,  a 
receiver or a creditor of Ambac Assurance may take the position 
that such proceeds do not secure the Ambac Note or the Tier 2 
Notes. If a court were to accept either of these positions, payments 
under  the Ambac  Note  or  Tier  2  Notes,  as  applicable,  may  be 
adversely affected and the Secured Notes or Tier 2 Notes, as the 
case may be, may become worthless.  In addition, a rehabilitation, 
insolvency 
liquidation,  conservation,  dissolution  or  other 

litigations  are  received  after 

the 

proceeding with respect to Ambac Assurance or the Secured Notes 
Issuer, as applicable, could lead to delays in payments due on the 
Secured Notes or Tier 2 Notes.

Fraudulent transfer laws may permit a court to void the Ambac 
Note, and if that occurs, holders may not receive any payments 
on the Secured Notes. 

Fraudulent  transfer  and  conveyance  statutes  may  apply  to  the 
issuance  of  the Ambac  Note.  Under  state  fraudulent  transfer  or 
conveyance laws, which may vary from state to state, the Ambac 
Note  could  be  voided  as  a  fraudulent  transfer  or  conveyance  if 
Ambac Assurance (a) issued the Ambac Note with the intent to 
hinder,  delay  or  defraud  creditors  or  (b) received  less  than 
reasonably  equivalent  value  or  fair  consideration  in  return  for 
issuing the Ambac Note and, in the case of (b) only, one of the 
following is also true at the time thereof:

•  Ambac Assurance  was  insolvent  or  rendered  insolvent  by 

reason of the issuance of the Ambac Note;

•  the issuance of the Ambac Note left Ambac Assurance with 
an unreasonably small amount of capital or assets to carry on 
its business; or

•  Ambac Assurance intended to, or believed that it would, incur 

debts beyond its ability to pay as they mature.

In  addition,  under Wisconsin  insurance  law,  if  the Ambac  Note 
were  issued  within  one  year  prior  to  the  filing  of  a  successful 
petition  for  rehabilitation  or  liquidation  with  respect  to Ambac 
Assurance,  the  Ambac  Note  could  be  voided  as  a  fraudulent 
transfer if Ambac Assurance issued the Ambac Note with the intent 
to  hinder,  delay  or  defraud  creditors  or  received  less  than  fair 
consideration in return for issuing the Ambac Note.

As a general matter, value is given for a transfer or an obligation 
if, in exchange for the transfer or obligation, property is transferred 
or a valid antecedent debt is satisfied. 

Ambac Assurance  cannot  be  certain  as  to  the  standards  a  court 
would  use  to  determine  whether  or  not Ambac Assurance  was 
insolvent at the relevant time or, regardless of the standard that a 
court uses, whether the Secured Notes would be subordinated to 
Ambac Assurance’s other debt or policyholder claims. In general, 
however, a court would deem an entity insolvent if:

•  the sum of its debts, including contingent and unliquidated 
liabilities, was greater than the fair saleable value of all of its 
assets;

•  the present fair saleable value of its assets was less than the 
amount that would be required to pay its probable liability on 
its  existing  debts,  including  contingent  liabilities,  as  they 
become absolute and mature; or

•  it could not pay its debts as they became due.

If a court were to find that the issuance of the Ambac Note was a 
fraudulent  transfer  or  conveyance,  the  court  could  void  the 
payment obligations under the Ambac Note or could subordinate 
the Ambac Note to presently existing and future indebtedness or 
policy obligations of Ambac Assurance, and, as a result, holders 
may not receive any payments on the Secured Notes. 

| Ambac Financial Group, Inc.   17   2017 FORM 10-K |

We have substantial indebtedness, which could adversely affect 
our financial condition, operational flexibility and our ability to 
obtain financing in the future.

reasonable  terms,  or  at  all.    Because  of  these  and  other  factors 
beyond our control, we may be unable to pay the principal, interest 
or other amounts on our debt securities.

We have a substantial amount of indebtedness.  Our substantial 
level of indebtedness and other financial obligations as well as the 
performance of our insured portfolio, which is driven to an extent 
by events outside our control, increase the possibility that we may 
be unable to generate cash sufficient to pay, when due, the principal 
of, interest on, or other amounts due, in respect of our indebtedness.  
Our  cash  flow  generation  will  depend  on  receipt  of  premiums, 
investment returns,  and potential litigation recoveries, offset by 
policyholder  claims,  commutation  payments  and  operating 
expenses, which will be subject to prevailing economic conditions 
and to financial, business and other factors, many of which are 
beyond  its  control  and  many  of  which  are  event-driven.  Our 
substantial debt could also have other significant consequences.  
For example, it could:

•  increase  our  vulnerability  to  general  adverse  economic, 

competitive and industry conditions;

•  limit our ability to obtain additional financing in the future 
for  working  capital,  capital  expenditures,  payment  of 
policyholder claims, debt service requirements, acquisitions, 
general corporate purposes or other purposes on satisfactory 
terms or at all;

•  require us to dedicate a substantial portion of our cash flow 
from operations to the payment of our indebtedness, thereby 
reducing the funds available to us for operations and to fund 
the execution of our key strategies;

•  limit or restrict us from making strategic acquisitions or cause 

us to make non-strategic divestitures;

•  limit our ability or increase the costs to refinance indebtedness 
or repay such indebtedness due to ongoing interest accretion;

•  limit our ability to attract and retain key employees; and

•  limit our ability to enter into hedging transactions by reducing 
the number of counterparties with whom we can enter into 
such transactions, as well as the volume of those transactions.

Despite current indebtedness levels, we and our subsidiaries may 
incur additional debt.  While restrictive covenants in certain of our 
contracts  currently  provide  limits  on  the  amount  of  additional 
indebtedness Ambac Assurance may incur, we may obtain a waiver 
of those restrictions and incur additional indebtedness in the future.  
In addition, if Ambac incurred indebtedness, its ability to make 
scheduled payments on, or refinance, any such indebtedness may 
depend on the ability of our subsidiaries to make distributions or 
pay dividends, which in turn will depend on their future operating 
performance and contractual, legal and regulatory restrictions on 
the payment of distributions or dividends to which they may be 
subject.   There  can  be  no  assurance  that  any  such  dividends  or 
distributions would be made.  This could further exacerbate the 
risks associated with our substantial leverage.

If we cannot pay policyholder claims or service debt, the Company 
will have to take actions such as selling assets, restructuring or 
refinancing  debt  or  seeking  additional  capital.    Any  of  these 
remedies  may  not,  if  necessary,  be  effected  on  commercially 

Ambac Assurance  has  ongoing  obligations  related  to  surplus 
notes.

Subject to approval by OCI, Ambac Assurance is required to make 
interest  and  principal  (to  the  extent  due)  payments  in  cash  on 
surplus notes on an annual basis. Ambac Assurance will be required 
to continue to make such payments, as and when approved by OCI, 
until  all  of  the  surplus  notes  mature,  are  repaid  in  full  or  are 
otherwise  repurchased  or  retired.    Ambac  Assurance  is  also 
obligated to make payments on junior surplus notes, subject to OCI 
approval,  after  the  senior  surplus  notes  have  been  paid  in  full. 
Ambac Assurance  may  not  have  the  ability  to  borrow,  raise  or 
otherwise have access to the funds necessary to pay such amounts 
when due.

Surplus  notes  that  were  not  exchanged  and  cancelled  in  the 
Exchange Offers may be acquired, redeemed or repaid on terms 
that may be viewed as more, or less, favorable than the terms of 
the consideration offered in the Exchange Offers.

The Company may acquire, redeem or repay surplus notes that are 
not exchanged and cancelled in the Exchange Offers through open 
market purchases, privately negotiated transactions, other tender 
or exchange offers, redemptions, repayment at maturity or such 
other  means  as  the  Company  deems  appropriate,  subject  to  the 
restrictions  in  the  Settlement Agreement,  Stipulation  and  Order 
and regulatory restrictions.  Any such transactions will occur upon 
the terms and at the prices as the Company may determine in its 
sole discretion, which may be more or less favorable than the terms 
of  the  Exchange  Offers,  and  could  be  for  cash  or  other 
consideration.  The Company may choose to pursue any or none 
of these alternatives, or combinations thereof, in the future.

The  surplus  notes  that  remain  outstanding  following  the 
consummation of the Exchange Offers are subordinated in right 
of payment to other claims, which could impair the right of the 
holders of such notes to receive interest and principal in the event 
of our insolvency or a similar occurrence.

The surplus notes are unsecured obligations of Ambac Assurance 
and are expressly subordinated in right of payment to all of Ambac 
Assurance’s  existing  and  future  indebtedness  (other  than  junior 
surplus notes) and policy claims.  The surplus notes are subject to 
provisions  of  Wisconsin  insurance  law,  which  establishes  the 
priority of distribution of claims from the estate of an insolvent 
insurance company.  In the event that Ambac Assurance becomes 
subject to rehabilitation, liquidation, conservation or dissolution, 
holders  of  Ambac Assurance’s  senior  indebtedness  and  policy 
claims  would  be  afforded  a  higher  priority  of  distribution  than 
holders of the surplus notes, and accordingly would have the right 
to be paid in full before holders of the surplus notes would be paid.  
Due to the nature of Ambac Assurance’s business, the amount of 
such  higher  priority  claims  in  any  rehabilitation,  liquidation, 
conservation or dissolution is likely to be many times greater than 
any free and divisible surplus and it is likely that the holders of 
surplus  notes  would  not  recover  any  payment 
in  such 
circumstances.  In addition, claims of holders of the surplus notes 
will  be  subordinated  to  certain  liabilities  of  the  Company’s 
subsidiaries that are guaranteed by Ambac Assurance.

| Ambac Financial Group, Inc.   18   2017 FORM 10-K |

Ambac Assurance  has  not  made  regular  interest  or  principal 
payments on surplus notes and may be unable to repay surplus 
notes in full at maturity or ever.

Changes  in  inter-bank  lending  rate  reporting  practices  or  the 
method  pursuant  to  which  LIBOR  rates  are  determined  may 
adversely affect the value of LIBOR linked financial instruments.

On November 20, 2014, Ambac Assurance, with the approval of 
OCI, redeemed surplus notes (other than junior surplus notes) in 
an amount equal to 26.67% of the principal amount of the surplus 
notes,  plus  accrued  interest  thereon,  outstanding  as  of  July  20, 
2014,  or  approximately  $396  million  owned  by  third  parties.  
However,  except  for  a  one-time  payment  of  approximately  six 
months of interest on the surplus notes (other than junior surplus 
notes) outstanding immediately after the Exchange Offers, no other 
interest  or  principal  payments  on  the  surplus  notes  have  been 
approved or made to date, and Ambac Assurance may not receive 
approval from OCI to make payments as and when scheduled.  As 
a result, holders of surplus notes may not be paid in full at maturity 
or ever.  If OCI does not begin to approve regular payments on the 
surplus  notes  (other  than  junior  surplus  notes)  within  the  next 
several years, the accretion of surplus notes may exceed our ability 
to  ever  repay  in  full  the  surplus  notes.    If  Ambac  Assurance 
becomes  subject  to  a    rehabilitation  or  liquidation  under  the 
Wisconsin insurance law, prior to the repayment of surplus notes, 
holders of surplus notes may not receive any recoveries on their 
investments.

The effects of the amendments to the Settlement Agreement in 
the recently completed consent solicitation done in connection 
with the Exchange Offers could materially and adversely affect 
the credit risk inherent in, and significantly reduce protections 
afforded in, surplus notes not validly tendered and accepted or 
received as consideration pursuant to the Exchange Offers.

including  covenants 

Holders of surplus notes that were not tendered and accepted or 
were received as consideration pursuant to the Exchange Offers 
will  be  subject  to  the  terms  of  the  Settlement  Agreement  as 
modified,  notwithstanding  the  fact  that  they  did  not  deliver 
consents  in  the  related  consent  solicitation.    Certain  restrictive 
covenants  and  other  related  provisions  in  the  Settlement 
Agreement, 
regarding  mergers  and 
consolidations  and  the  incurrence  of  indebtedness,  have  been 
modified or eliminated.  As a result, holders of surplus notes no 
longer are entitled to the benefit of such provisions, which existed 
for the protection and benefit of holders of the surplus notes issued 
pursuant to the Settlement Agreement.  The Settlement Agreement, 
as so amended, continues to govern the terms of all surplus notes 
issued thereunder that remain outstanding after the consummation 
of  the  Exchange  Offers  and  Rehabilitation  Exit  Transactions.  
Accordingly, we may take certain actions in the future previously 
prohibited under the Settlement Agreement that could adversely 
affect the market prices of the surplus notes and otherwise increase 
the risks related to investments in the surplus notes.

Increases in interest rates will increase the cost of servicing our 
debt could reduce our profitability and could result in a decrease 
in the value of the Secured Notes.

The Secured Notes will bear interest at a variable rate. As a result, 
increases in interest rates will increase the cost of servicing the 
Secured Notes and could adversely affect our profitability and cash 
flows. Each one percentage point increase in interest rates would 
result  in  an  $21.8  million  increase  in  the  annual  cash  interest 
payments due on the Secured Notes.

Since February 1, 2014, the administration of LIBOR has been 
undertaken by ICE Benchmark Administration Limited (“IBA”), 
a  subsidiary  of  Intercontinental  Exchange  Group.  IBA,  as  the 
administrator of LIBOR, may make changes in methodology that 
could change the level of LIBOR, which in turn may adversely 
affect  the  value  of  financial  instruments  linked  to  LIBOR, 
including  investment  securities,  swaps,  and  the  Secured  Notes. 
Since 2014, the IBA published multiple papers and other literature, 
including a “LIBOR Code of Conduct” relating to the setting of 
LIBOR.  IBA  has  the  power  to  alter,  discontinue  or  suspend 
calculation or dissemination of LIBOR. 

On July 27, 2017, the U.K. Financial Conduct Authority announced 
that it will no longer persuade or compel banks to submit rates for 
the  calculation  of  LIBOR  rates  after  2021  (the  “July  27th 
Announcement”). The July 27th Announcement indicates that the 
continuation of LIBOR on the current basis cannot and will not be 
guaranteed after 2021. Consequently, at this time, it is not possible 
to predict whether and to what extent banks will continue to provide 
LIBOR submissions to the administrator of LIBOR or whether any 
additional  reforms  to  LIBOR  may  be  enacted  in  the  United 
Kingdom or elsewhere.  Similarly, it is not possible to predict what 
rate or rates may become accepted alternatives to LIBOR of the 
effect  of  any  such  alternatives  on  the  value  of  LIBOR-linked 
securities. Any of the above changes or any other consequential 
changes to LIBOR or any alternative rate or benchmark as a result 
of any international, national, or other proposals for reform or other 
initiatives or investigations, or any further uncertainty in relation 
to the timing and manner of implementation of such changes, could 
have  a  material  adverse  effect  on  the  value  investments  in  our 
investment portfolio, swaps we use for hedging, and the Secured 
Notes.

The amount of interest payable on the Secured Notes is set only 
once per interest period based on the three-month LIBOR rate 
on  the  applicable  interest  determination  date,  which  rate  may 
fluctuate substantially, and affect our ability to make payment 
on the Secured Notes.

In  the  past,  the  level  of  the  three-month  LIBOR  rate  has 
experienced significant fluctuations. Historical levels, fluctuations 
and  trends  of  the  three-month  LIBOR  rate  are  not  necessarily 
indicative  of  future  levels. Any  historical  upward  or  downward 
trend in the three-month LIBOR rate is not an indication that the 
three-month  LIBOR  rate  is  more  or  less  likely  to  increase  or 
decrease  at  any  time  during  an  interest  period  for  the  Secured 
Notes, and historical levels of the three-month LIBOR rate should 
not be taken as an indication of its future performance. In addition, 
although the actual three-month LIBOR rate on an interest payment 
date or at other times during an interest period may be higher than 
the 
interest 
determination  date,  the  only  relevant  date  for  purposes  of 
determining the interest payable on the Secured Notes is the three-
month LIBOR rate as of the respective interest determination date. 
Changes  in  the  three-month  LIBOR  rates  between  interest 
determination  dates  will  not  affect  the  interest  payable  on  the 
Secured Notes. As a result, changes in the three-month LIBOR rate 
may not result in a comparable change in the market value of the 
Secured Notes.

three-month  LIBOR  rate  on 

the  applicable 

| Ambac Financial Group, Inc.   19   2017 FORM 10-K |

The Secured Notes will bear interest at floating rates that could 
rise significantly, increasing Ambac Assurance’s interest expense 
and reducing its cash flow. If Ambac Assurance’s interest expense 
increases  significantly,  whether  due  to  changes  in  LIBOR  or 
increased  borrowing  costs  when  its  refinances  its  current 
indebtedness, Ambac Assurance may not be able to make payments 
with respect to the Secured Notes or its other indebtedness.

Ambac’s representation and warranty recovery may change over 
time, causing the value or the perceived value of the collateral 
securing the Secured Notes and Tier 2 Notes to change and any 
such changes may be material.

Ambac  reevaluates  its  estimated  representation  and  warranty 
recoveries on a quarterly basis in connection with the preparation 
of its financial statements. See “Critical Accounting Policies and 
Estimates” in Part II, Item 7, Note 2. Basis of Presentation and 
Significant Accounting Policies and Note 7. Financial Guarantee 
Insurance  Contracts  to  the  Consolidated  Financial  Statements 
included in Part II, Item 8 of this Form 10-K for the fiscal year 
ended  December 31,  2017. As  a  result  of  any  reevaluation,  the 
amount of Ambac’s representation and warranty recovery may be 
adjusted upward or downward due to, among other things, changes 
in  management's  view  of  the  value  of  such  recoveries  and/or 
changes in the loss reserves related to such recoveries, and any 
adjustment  may  be  material.    Changes  in  representation  and 
warranty  recoveries  may  result  in  material  changes  in Ambac’s 
financial condition, including its capital and liquidity. In addition, 
any adjustment to representation and warranty recoveries may alter 
the  value  or  the  perceived  value  of  the  collateral  securing  the 
Secured Notes and Tier 2 Notes before payment on the Secured 
Notes or Tier 2 Notes is made in full, which may affect the value 
of,  and  trading  market,  if  any,  for,  the  Secured  Notes  or Tier  2 
Notes.  Management  makes  no 
the 
representation and warranty recoveries will not change, materially 
or at all, including in the near term. There can be no assurance that 
the apparent, or actual, value of the collateral securing the Secured 
Notes and Tier 2 Notes will equal or exceed the principal amount 
of the Secured Notes and Tier 2 Notes, respectively, at all times 
prior to maturity. 

representation 

that 

Risks Related to Capital, Liquidity and Markets

Our inability to realize the expected recoveries included in our 
financial  statements  could  adversely  impact  our  liquidity, 
financial condition and results of operations and the value of the 
Secured Notes and Tier 2 Notes.

As of December 31, 2017, we have estimated representation and 
warranty  subrogation  recoveries  of  $1,806.7  million  (net  of 
reinsurance) included in our financial statements. These recoveries 
are based on contractual claims arising from RMBS transactions 
that Ambac Assurance  has  insured,  and  represent  a  probability-
weighted estimate of amounts we expect to recover under various 
possible  scenarios,  and  do  not  represent  the  best  or  the  worst 
possible  outcomes  with  respect  to  any  particular  transaction  or 
group of transactions. Our ability to recover these amounts and the 
time of the recoveries, if any, is subject to significant uncertainty, 
including risks inherent in litigation, collectability of such amounts 
from counterparties and/or their respective parents and affiliates, 
timing  of  receipt  of  any  such  recoveries,  intervention  by  OCI, 
which could impede Ambac Assurance's ability to take the actions 
required to realize such recoveries, and uncertainties inherent in 
the assumptions used in estimating such recoveries. The amount 

of these subrogation recoveries is significant and if we were unable 
to  recover  such  amounts,  our  stockholders’  equity  as  of 
December 31,  2017  would  decrease  from  $1,645.3  million  to 
$(161.4) million.

We expect to recover material amounts of claims payments through 
remediation measures including the litigation described above as 
well  as  through  cash  flows  in  the  securitization  structures  of 
transactions  that Ambac Assurance  insures.  Realization  of  such 
expected recoveries is subject to various risks and uncertainties, 
including the rights and defenses of other parties with interests that 
conflict with Ambac Assurance's interests, the performance of the 
collateral and assets backing the obligations that Ambac Assurance 
insures, the performance of servicers involved in securitizations 
in which Ambac Assurance participates as insurer, and the effect 
the  Segregated  Account 
on  Ambac  Assurance's  rights  of 
rehabilitation. Additionally,  our  ability  to  realize  recoveries  in 
insured transactions may be impaired if orders of the Rehabilitation 
Court are not effective.

Adverse developments with respect to such variables may cause 
our  recoveries  to  fall  below  expectations,  which  could  have  a 
material adverse effect on our financial condition, including our 
capital and liquidity.

Ambac’s  estimate  of  RMBS  litigation  recoveries  is  subject  to 
significant  uncertainty  and  changes  to  the  estimate  could 
adversely impact its liquidity, financial condition and results of 
operations.

For  Ambac’s  current  RMBS  cases  for  which  it  records  a 
representation and warranty recovery in its financial statements, 
Ambac has been provided access to loan files for all loans in the 
relevant  original  pool  and Ambac  utilizes  a  “random  sample” 
approach  to  estimate  such  recoveries.   Ambac  does  not  include 
estimates of damages attributed solely to fraudulent inducement 
claims in its estimate of representation and warranty recoveries. 

The amount estimated for purposes of Ambac’s representation and 
warranty recovery and the amount Ambac may ultimately receive 
is  subject  to  significant  uncertainty,  including  risks  inherent  in 
litigation, collectability of such amounts from counterparties and/
or their respective parents and affiliates, timing of receipt of any 
recoveries, intervention by the OCI, which could impede Ambac’s 
ability  to  take  actions  required  to  realize  recoveries,  and 
uncertainties inherent in the assumptions used in estimating any 
recoveries. In particular, Ambac’s assumptions regarding default 
rates of the loans and Ambac’s expectations with respect to the 
RMBS litigations have a significant impact on Ambac’s estimated 
representation  and  warranty  recoveries.  If  these  assumptions, 
expectations or estimates prove to be incorrect, or if an investor 
were  to  use  different  assumptions,  expectations  or  estimates  to 
predict recoveries, actual recoveries could differ materially from 
those estimated. Actual recovery will ultimately depend on future 
events and there can be no assurance that the assumed default rates 
or  estimated  RMBS  litigations  recoveries  will  not  differ  from 
actual events. Although Ambac believes that its methodology for 
extrapolating estimated recoveries is appropriate for evaluating the 
amount of potential recoveries, the methodologies Ambac uses to 
estimate expected losses in general and for any specific obligation 
in particular may not be similar to methodologies used by Ambac’s 
competitors,  counterparties  or  other  market  participants.  The 
determination  of  expected  recovery  is  an  inherently  subjective 

| Ambac Financial Group, Inc.   20   2017 FORM 10-K |

process 
involving  numerous  estimates,  assumptions  and 
judgments by management, using both internal and external data 
sources with regard to frequency, economic projections and other 
factors that affect credit performance. As a result, Ambac’s current 
estimates may not reflect Ambac’s future ultimate recovery and 
management  makes  no  representation  that  the  actual  amount 
recovered, if any, will not differ materially from those estimated. 
The failure of Ambac’s actual recovery to meet or exceed its current 
estimate  could  result  in  a  material  adverse  effect  on Ambac’s 
financial condition, including its capital and liquidity. 

The surplus notes that remain outstanding and that were received 
by  holders  of  Deferred Amounts  from Ambac  pursuant  to  the 
Second Amended Plan of Rehabilitation may not be fungible with 
the other surplus notes that remain outstanding following the 
consummation of the Exchange Offers.

The surplus notes that were held by Supporting Holders but were 
not accepted for tender and that remain outstanding following the 
consummation of the Exchange Offers will accrue original issue 
discount (“OID”) in a manner that differs from the accrual of OID 
on the surplus notes received by holders of Deferred Amounts from 
Ambac pursuant to the Second Amended Plan of Rehabilitation, 
and,  therefore,  the  surplus  notes  that  were  held  by  Supporting 
Holders  but  were  not  accepted  for  tender  and  that  remain 
outstanding following the consummation of the Exchange Offers 
will not be fungible with the surplus notes received by holders of 
Deferred Amounts from AFG pursuant to the Second Amended 
Plan of Rehabilitation for U.S. federal income tax purposes.

We may not be able to commute or reduce insured exposures.

In pursuing the objective of improving its financial position, we 
are seeking to commute or reduce insured exposures. Transactions 
of  this  nature  may  not  be  feasible  or  economically  viable.   We 
cannot  provide  any  assurance  that  any  such  transaction  will  be 
consummated in the future, or if it is, as to the timing, terms or 
conditions of any such transaction.  Even if we consummate one 
or more such transactions, doing so may ultimately prove to be 
unsuccessful in creating value for any or all of our stakeholders 
and may adversely affect our operating results or financial position.

Revenues and cash flow would be adversely impacted by a decline 
in realization of installment premiums.

Due  to  the  installment  nature  of  a  significant  percentage  of  its 
premium  income,  Ambac  Assurance  has  an  embedded  future 
revenue  stream.  The  amount  of  installment  premiums  actually 
realized by Ambac Assurance could be reduced in the future due 
to  factors  such  as  early  termination  of  insurance  contracts, 
accelerated prepayments of underlying obligations or insufficiency 
of cash flows (by the premium paying entity). Additionally, the 
Segregated  Account  rehabilitation  may  result  in  the  loss  of 
installment  premium  income  from  such  insured  transactions  if 
orders  of  the  Rehabilitation  Court  are  not  effective.    Such 
reductions would result in lower revenues.

The change in composition of the securities in our investment 
portfolio exposes us to greater risk.

Each  of Ambac Assurance  and Ambac Assurance  UK  Limited 
(“Ambac UK”) maintains a portion of its investment portfolio in 
lower-rated  securities  and/or  “alternative  assets”  in  order  to 
increase the risk-adjusted return on its portfolio. Investments in 
lower-rated securities and “alternative assets” could expose Ambac 

and/or Ambac UK to greater earnings volatility, increased losses 
and decreased liquidity in the investment portfolio.

We may have future capital needs and may not be able to obtain 
third-party financing or raise additional third-party capital on 
acceptable terms, or at all.

An inability to obtain third-party debt financing or raise additional 
third-party  capital,  when  required  by  us  or  when  business 
conditions warrant, could have a material adverse effect on our 
business,  financial  condition  and  results  of  operations.    The 
economic conditions affecting our industry, as well as other factors, 
may constrain our financing abilities.  Our ability to secure third-
party  financing,  if  available,  and  to  satisfy  or  refinance  our 
financial obligations under indebtedness outstanding from time to 
time will depend upon regulatory conditions, our future operating 
performance,  the  availability  of  credit  generally,  economic 
conditions and financial, business and other factors, many of which 
are  beyond  our  control.    The  market  conditions  and  the 
macroeconomic conditions that affect our industry could have a 
material adverse effect on our ability to secure third-party financing 
on favorable terms, if at all.

If third-party financing is not available when needed, or is available 
on  unfavorable  terms,  we  may  be  unable  to  take  advantage  of 
business  opportunities,  respond  to  competitive  pressures  or 
refinance our outstanding indebtedness, any of which could have 
a material adverse effect on our business, financial condition and 
results of operations.

Ambac  Assurance  may  in  the  future  report  a  policyholders’ 
deficit or become insolvent.

Our expected financial condition after the consummation of the 
Rehabilitation Exit Transactions is based on various assumptions 
concerning  these  transactions,  including  accounting  and  tax 
treatment.  There can be no assurance that the assumptions will 
not differ materially from the ultimate results of such transactions 
and  any  differences  may  be  material.    In  addition,  while  the 
Rehabilitation  Exit  Transactions  and  related  transactions  were 
designed to improve our financial condition, we will continue to 
be subject to risks and uncertainties that could materially affect 
our financial position.  Therefore, even following consummation 
of the Rehabilitation Exit Transactions, circumstances may occur 
that  would  cause  Ambac  Assurance  to  report  a  policyholders’ 
deficit  or  not  comply  in  the  future  with  the  statutory  minimum 
policyholders’  surplus  or  undergo  rehabilitation.    In  addition, 
Ambac Assurance may become insolvent in the future.  OCI has 
prescribed or permitted additional accounting practices for Ambac 
Assurance and Everspan which are described in Note 8. Insurance 
Regulatory Restrictions to the Consolidated Financial Statements 
included in Part II, Item 8 in this  Form 10-K.  If Ambac Assurance 
and  Everspan  are  unable  to  utilize  the  permitted  or  prescribed 
practices,  we  may  not  comply  with  the  statutory  minimum 
policyholders’ surplus.

The  determination  of  the  amount  of  other-than  temporary 
impairments taken on our investments is highly subjective and 
could  materially  impact  our  results  of  operations  or  financial 
position.

The  determination  of  the  amount  of  impairments  on  our 
investments  varies  by  investment  type  and  is  based  upon  our 
periodic evaluation and assessment of known and inherent risks 
associated with the respective asset class. Such evaluations and 

| Ambac Financial Group, Inc.   21   2017 FORM 10-K |

assessments are revised as conditions change and new information 
becomes available. Management updates its evaluations regularly 
and  reflects  changes  in  impairments  as  such  evaluations  are 
revised.  There  can  be  no  assurance  that  our  management  has 
accurately assessed the level of impairments taken in our financial 
statements. Furthermore, additional impairments may need to be 
taken in the future. Historical trends may not be indicative of future 
impairments. In particular, we use externally developed financial 
models to project impairments with respect to RMBS held in our 
investment  portfolio,  including  Ambac  Assurance  guaranteed 
RMBS. Differences in the models we employ and/or flaws in these 
models  and/or  faulty  assumptions  inherent  in  these  models  and 
those  determined  by  management,  could  lead  to  increased 
impairments with respect to RMBS in our investment portfolio.

Risks Related to the Financial and Credit Markets

Changes in prevailing interest rate levels and market conditions 
could adversely impact our business results and prospects.

Increases in prevailing interest rate levels can adversely affect the 
value  of  our  investment  portfolio  and,  therefore,  our  financial 
strength. In the event that investments must be sold in order to pay 
claims,  to  pay  debt  obligations,  or  to  meet  Financial  Services 
liquidity needs due to contract terminations or collateral posting 
requirements, such investments would likely be sold at discounted 
prices.  Additionally,  increasing  interest  rates  would  have  an 
adverse impact on our insured portfolio. For example, increasing 
interest rates could result in higher claim payments in respect of 
defaulted obligations that bear interest at floating rates of interest. 
Higher  interest  rates  can  also  lead  to  increased  credit  stress  on 
consumer  asset-backed  transactions  (as  the  securitized  assets 
supporting a portion of these exposures are floating rate consumer 
obligations), slower prepayment speeds and resulting “extension 
risk” relative to such consumer asset-backed transactions in our 
insured  and  investment  portfolios,  and  decreased  refinancing 
activity.

Decreasing  interest  rates  could  result  in  early  terminations  of 
financial guarantee insurance policies in respect of which we are 
paid  on  an  installment  basis  and  do  not  receive  a  termination 
premium, thus reducing premium earned for these  transactions. 
Decreases in prevailing interest rates may also limit growth of or 
reduce investment income and may adversely impact our interest 
rate swap portfolio.

Our investment portfolio may also be adversely affected by credit 
rating downgrades, ABS and RMBS prepayment speeds, foreign 
exchange movements, spread volatility, and credit losses.

We are subject to credit risk throughout our businesses, including 
large  single  risks,  risk  concentrations,  correlated  risks  and 
reinsurance counterparty credit risk.

We  are  exposed  to  the  risk  that  issuers  of  debt  which  we  have 
insured  (or  with  respect  to  which  we  have  written  credit 
derivatives),  issuers  of  debt  which  we  hold  in  our  investment 
portfolio, reinsurers and other contract counterparties (including 
derivative  counterparties)  may  default 
their  financial 
obligations, whether as the result of insolvency, lack of liquidity, 
operational failure, fraud or other reasons. These credit risks could 
cause increased losses and loss reserves, and/or estimates of credit 
impairments  and  mark-to-market  losses  with  respect  to  credit 
derivatives  in  our  financial  guarantee  business;  and  we  could 

in 

experience  losses  and  decreases  in  the  value  of  our  investment 
portfolio and, therefore, our financial strength. Such credit risks 
may  be  in  the  form  of  large  single  risk  exposures  to  particular 
issuers, reinsurers or counterparties; losses caused by catastrophic 
events (including terrorist acts and natural disasters); losses caused 
by increases in municipal defaults; or losses in respect of different, 
but correlated, credit exposures.

Risks Related to the Company's Business

We are subject to the risk of litigation and regulatory inquiries 
or investigations, and the outcome of proceedings we are or may 
become involved in could have a material adverse effect on our 
business,  operations,  financial  position,  profitability  or  cash 
flows. 

Ambac Assurance  is  defending  various  lawsuits  relating  to  its 
financial guarantee business.  In addition, the Company from time 
to  time  receives  various  regulatory  inquiries  and  requests  for 
information. Please see Note 16. Commitments and Contingencies 
to the Consolidated Financial Statements included in Part II, Item 8 
in this Form 10-K for information on these various proceedings. 

It is not possible to predict whether additional suits will be filed 
against  Ambac,  Ambac  Assurance  or  one  or  more  other 
subsidiaries or whether additional regulatory inquiries or requests 
for information will be made, and it is also not possible to predict 
the outcome of litigation, inquiries or requests for information. It 
is possible that there could be unfavorable outcomes in these or 
other proceedings. Management is unable to make a meaningful 
estimate  of  the  amount  or  range  of  loss  that  could  result  from 
unfavorable outcomes or of the expenses that will be incurred in 
defending  these  lawsuits.  Under  some  circumstances,  adverse 
results in any such proceedings and/or the incurring of significant 
litigation expenses could be material to our business, operations, 
financial position, profitability or cash flows.

The Settlement Agreement and Stipulation and Order contain 
restrictive covenants that may impair our ability to pursue our 
business strategies.

Pursuant to the terms of the Settlement Agreement and Stipulation 
and Order, Ambac Assurance must seek prior approval by OCI of 
certain  corporate  actions.  The  Settlement  Agreement  and 
Stipulation  and  Order  also  include  covenants  which  restrict  the 
operations of Ambac Assurance which, in the case of the Settlement 
Agreement, remain in force until the surplus notes that were issued 
pursuant  to  the  Settlement  Agreement  have  been  redeemed, 
repurchased or repaid in full, and, in the case of the Stipulation and 
Order,  remain  in  place  until  the  OCI  decides  to  relax  such 
restrictions. Certain of these restrictions may be waived with the 
approval  of  holders  of  the  surplus  notes  issued  pursuant  to  the 
Settlement Agreement and/or OCI. If we are unable to obtain the 
required  consents  under  the  Settlement  Agreement  and/or 
Stipulation and Order, we may not be able to execute our planned 
business strategies.

OCI has certain enforcement rights with respect to the Settlement 
Agreement and Stipulation and Order. Disputes may arise over the 
interpretation  of  such  agreements,  the  exercise  or  purported 
exercise of rights thereunder, or the performance of or failure or 
purported  failure  to  perform  obligations  thereunder. Any  such 
dispute  could  have  material  adverse  effects  on  the  Company, 
proceedings, 
whether 

administrative 

litigation, 

through 

| Ambac Financial Group, Inc.   22   2017 FORM 10-K |

supervisory  orders,  failure  to  execute  transactions  sought  by 
management, interference with corporate strategies, objectives or 
prerogatives,  inefficient  decision-making  or  execution,  forced 
realignment  of  resources, 
to 
management, strained working relationships or otherwise. Such 
effects would also increase the risk that OCI would seek to initiate 
rehabilitation proceedings against Ambac Assurance.

increased  costs,  distractions 

System security risks, data protection breaches and cyber-attacks 
could adversely affect our business and results of operations.

We  rely  on  our  information  technology  systems  for  many 
enterprise-critical functions and a prolonged failure or interruption 
of these systems for any reason could cause significant disruption 
to our operations and have a material adverse effect on our business, 
financial  condition  and  operating  results.  Our  information 
technology and application systems may be vulnerable to threats 
from  computer  viruses,  natural  disasters,  unauthorized  access, 
cyber-attack and other similar disruptions. Computer hackers may 
be  able  to  penetrate  our  network’s  system  security  and 
misappropriate  or  compromise  confidential  information,  create 
system  disruptions  or  cause  shutdowns.  In  addition  to  our  own 
confidential information, we sometimes receive and are required 
to protect confidential information from third parties. To the extent 
any disruption or security breach results in a loss or damage to our 
data, or inappropriate disclosure of our confidential information 
or that of others, it could cause significant financial losses that are 
either not, or not fully, insured against, damage to our reputation, 
affect our relationships with third parties, lead to claims against 
us, result in regulatory action, or otherwise have a material adverse 
effect on our business or results of operations. In addition, we may 
be required to incur significant costs to mitigate the damage caused 
by  any  security  breach,  or  to  protect  against  future  damage. 
Moreover,  although  we  have  disaster  recovery  and  business 
continuity plans in place, we may not be able to adequately execute 
these plans in a timely fashion in the event of a disruption to our 
information technology and application systems. 

We  may  incur  losses  resulting  from  operational  risk  due  to 
inadequate or failed internal processes, breakdown of settlement 
or communication systems, or from external events leading to 
disruption  of  our  business.  Events  subject  to  operational  risk 
include:

•  Internal  Fraud-misappropriation  of  assets, 

intentional 

mismarking of positions 

•  External  Fraud-theft  of  information,  third-party  theft  and 

forgery 

•  Clients,  Products, &  Business  Practice-improper  trade, 

fiduciary breaches 

•  Damage to Physical Assets 

•  Business  Disruption &  System  Failures-software  failures, 

hardware failures; and 

•  Execution,  Delivery, &  Process  Management-data  entry 
errors,  accounting  errors,  failed  mandatory  reporting, 
settlement errors, and negligence.

We may be adversely affected by failures in services or products 
provided by third parties.

We  have  outsourced  and  may  continue  to  outsource  certain 
activities of our operations and business, and rely upon third-party 
vendors for other essential services and information, such as the 
provision of data used in setting loss reserves and the provision of 
risk management information and services. A material failure by 
an external service or information provider or a material defect in 
the  products,  services  or  information  provided  thereby  could 
adversely affect our financial condition and results of operations.

Our  inability  to  attract  and  retain  qualified  executives  and 
employees or the loss of any of these personnel could negatively 
impact our business.

Our ability to execute on our business strategies depend on the 
retention  and  recruitment  of  qualified  executives  and  other 
professionals.  We  rely  substantially  upon  the  services  of  our 
current executive team. In addition to these officers, we require 
key staff with risk mitigation, structured finance, insurance, credit, 
investment, accounting, finance, legal and technical skills. As a 
result  of Ambac’s  financial  situation,  there  is  a  higher  risk  that 
executive officers and other key staff will leave the Company and 
replacements may not be motivated to join the Company. The loss 
of the services of members of our senior management team or our 
inability to hire and retain other talented personnel could delay or 
prevent  us  from  succeeding  in  executing  our  strategies,  which 
could further negatively impact our business.

Our  business  could  be  negatively  affected  by  actions  of 
stakeholders whose interests may not be aligned with the broader 
interests of our stockholders.

Ambac  could  be  negatively  affected  as  a  result  of  actions  by 
stakeholders whose interests may not be aligned with the broader 
interests of our stockholders, and responding to any such actions 
could be costly and time-consuming, disrupt operations and divert 
the attention of management and employees.  Such activities could 
interfere with our ability to execute on our strategic plans.

Risks Related to International Business

Actions of the PRA and FCA could reduce the value of Ambac 
UK  realizable  by  Ambac,  which  would  adversely  affect  our 
securityholders. 

Ambac’s international business is operated by Ambac UK, which 
is regulated by the Prudential Regulation Authority (“PRA”) for 
prudential purposes and the Financial Conduct Authority (“FCA”) 
for conduct purposes. Under the Financial Services and Markets 
Act 2000 (“FSMA”), the PRA authorized Ambac UK to carry out 
financial guaranty insurance business in the UK and in the EU by 
way of the EU’s passporting regime (although this may change 
following  Brexit),  subject  to  the  terms  and  conditions  of  the 
permission  granted  by  the  PRA  and  consented  to  by  the  FCA.   
However, the terms of Ambac UK’s regulatory authority are now 
restricted and Ambac UK is in run-off.  Among other things, Ambac 
UK may not write any new business, and, with respect to any entity 
within the Ambac group of affiliates, commute, vary or terminate 
any existing financial guaranty policy, transfer certain assets, or 
pay dividends, without the prior approval of the PRA and FCA.  
The  PRA  and  FCA  act  generally  in  the  interests  of Ambac  UK 
policyholders  and  will  not  take  into  account  the  interests  of 
securityholders of Ambac or Ambac Assurance when considering 
  Accordingly, 
whether 

to  provide  any  such  approval. 

| Ambac Financial Group, Inc.   23   2017 FORM 10-K |

determinations made by the PRA and FCA, in their capacity as 
Ambac  UK’s  regulator,  could  potentially  result  in  adverse 
consequences for our securityholders and also reduce the value 
realizable by Ambac for Ambac UK.

Regulatory  uncertainty  in  relation  to  Ambac  UK’s  capital 
position could adversely affect the value of Ambac UK and affect 
our securityholders.

Under applicable regulatory capital rules (“Solvency II”) Ambac 
UK remains significantly deficient in terms of capital.  Ambac UK 
does not have a remedial plan other than to build its assets over 
time  by  on-going  premium  collections  and  earned  investment 
income,  as  well  as  attempting  to  accelerate  the  run-off  of  its 
exposures.  Further, there currently is no prospect of any capital 
support from the Ambac group of affiliates.  The PRA is well aware 
of Ambac  UK’s  position  and  prospects.  The  PRA  supervisory 
statement SS7/15 “Supervision of firms in difficulty or run-off” 
notes  that  “there  are  many  circumstances  in  which  a  run-off 
strategy is in the best interests of policyholders” and notes that the 
PRA will review such firms and that they “may be permitted to 
continue activities necessary to carry out existing contracts in a 
manner, and for so long as, the PRA considers necessary in order 
to  afford  an  appropriate  degree  of  protection  to  policyholders”.  
AUK clearly falls into this category and therefore AUK’s current 
run off approach remains at all times subject to the PRA continuing 
to  take  no  action  in  relation  to  its  capital  deficit  and  related 
Solvency II requirements. Alternative courses of action open to the 
PRA could adversely impact the anticipated run-off trajectory of 
Ambac UK and impact its value.

Uncertainty regarding the economic impact of “Brexit” may have 
an adverse effect on Ambac’s insured international portfolio and 
the  value  of  its  foreign  investments,  both  of  which  primarily 
reside with its subsidiary Ambac UK.

In  a  non-binding  referendum  on  the  United  Kingdom’s  (“UK”) 
membership  in  the  European  Union  (“EU”)  in  June  2016,  a 
majority of those who voted approved the UK’s withdrawal from 
the  EU. As  a  result  of  the  referendum,  in  March  2017  the  UK 
government gave the EU formal notification of its intent to leave 
with  the  expectation  of  formal  withdraw  two  years  later  on  29 
March 2019. Also in March 2017 the UK began initial (or phase 
one) negotiations with the EU regarding the terms of its departure 
(“Brexit”).  On  8  December  2017  the  EU  and  UK  jointly 
announced,  as  set  out  in  the  Joint  Report  and  Commission 
Communication of 8 December (“Joint Report”), that “sufficient 
progress” in phase one of the separation negotiations between the 
parties had been made to permit Brexit negotiations to move on to 
a more detailed phase two beginning in January 2018. 

The  Joint  Report  is  “a  summary  of  the  negotiations  toward  the 
legally  binding  withdrawal  agreement”  and  is  not  itself  legally 
binding but rather is a position paper setting out current agreement 
between the EU and the UK Government in three priority areas 
(citizens’ rights, the financial settlement and the Irish border).  It 
also notes progress on other separation issues that have not yet 
been settled.  Further details of the negotiations are provided in the 
House of Commons Briefing Paper Number 8183, 18 December 
2017.

While  phase  two  Brexit  separation  discussions  commenced  in 
January 2018, these discussions will not include details of future, 
post-Brexit, trade relations. What is envisaged in the Joint Report 

next is “an agreement as early as possible in 2018 on transitional 
arrangements”. A further, separate, mandate for negotiations on a 
future post-transition trade framework is anticipated to begin by 
summer  2018.   It  is  envisaged  negotiations  on  the  future  trade 
framework will be concluded during the actual transitional phase, 
and  will  be  influenced  by  the  nature  of  the  transitional 
arrangements agreed between the parties.

If  no  transitional  arrangements  or  new  agreements  are  put  into 
place,  Brexit  will  mean  that  the  activities  in  the  EEA  of  UK 
passporting  insurers  will  become  unlawful  on  29  March  2019. 
They will lose their legal authorization to serve clients who benefit 
from policies issued by a UK incorporated insurer under freedom 
of services passporting rights (and thereby maybe unable to legally 
collect premiums or pay claims) and if they have branches in EEA 
Member States they may be legally obliged to close them down 
and no longer be legally represented in those jurisdictions.

In light of the materiality of the insurance sector to the UK economy 
and  taking  into  account  the  significant  amount  of  insurance 
business undertaken by EEA based insurers in the UK (which will 
be similarly affected) it is expected that transition arrangements 
will be put in place leading to insurers being able to continue to 
service EU policies beyond 29 March 2019 for at least a transition 
period  and  likely  to  their  natural  run-off  in  relation  to  policies 
written prior to 29 March 2019.  However, at this stage there is no 
certainly that such a transition agreement can be reached between 
the EU and the UK Government. 

Ambac  UK  has  seven  policies  in  the  EU  written  under  current 
passporting  rights  the  aggregate  par  value  of  which  as  at 
December 31, 2017 is $2.6 billion and as noted Ambac UK’s ability 
to  service  these  contracts  beyond  29  March  2019  is  currently 
unclear until legally binding Brexit transition agreements are put 
into place prior to that date.

In addition to the direct impact on insurers cited above, general 
uncertainty and the perceptions as to the ultimate impact of Brexit 
may  adversely  affect  business  activity,  political  stability  and 
economic  conditions  in  the  UK,  the  Eurozone,  the  EU  and 
elsewhere.  The  economic  outlook  could  be  further  adversely 
affected by (i) the risk that one or more other EU countries could 
come under increasing pressure to leave the EU, (ii) the risk of a 
greater demand for independence by Scottish nationalists or for 
unification in Ireland and its impact on the United Kingdom, or 
(iii) the risk that the Euro as the single currency of the Eurozone 
could cease to exist. Any of these developments, or the perception 
that any of these developments are likely to occur, could have a 
material adverse effect on economic growth or business activity 
in the UK, the Eurozone, and/or the EU, and could result in the 
relocation  of  businesses,  cause  business  interruptions,  lead  to 
economic recession or depression, and impact the stability of the 
financial markets, the availability of credit, political systems or 
financial institutions and the financial and monetary system.

These economic conditions, particularly a recession or depression, 
may  have  a  material  adverse  effect  on  Ambac’s  international 
insured exposures particularly in the UK and Europe, the majority 
of which reside in Ambac UK. The creditworthiness of Ambac’s 
international insured exposures is subject to risks associated with, 
among  other  matters,  lower  asset  values  related  to  collateral 
backing transactions, depressed demand for services resulting in 
lower  operating  cash  flows  and  reduced  access  to  the  capital 

| Ambac Financial Group, Inc.   24   2017 FORM 10-K |

markets and other sources of financing or refinancing. In addition, 
such conditions may have a material adverse effect on the value 
and  volatility  of  investments,  including  investments  in  UK 
property funds and equities that Ambac maintains, mainly through 
Ambac  UK,  in  markets  and  currencies  outside  of  the  U.S. 
Collectively, these effects may have a negative impact on Ambac’s 
operating results and financial condition resulting from unexpected 
credit,  investment  and  foreign  exchange  losses,  volatile  asset 
values, reduced liquidity and lost revenues. 

The  uncertainty  concerning  the  timing  and  terms  of  the  Brexit 
could result in additional volatility in the equity, foreign exchange, 
real  property,  bond  and  other  markets,  which  could  adversely 
impact the UK economy and Ambac's results of operations and 
financial condition over the near and long term.

Risks Related to Taxation

Certain surplus notes or other obligations of Ambac Assurance 
may be characterized as equity of Ambac Assurance and as a 
result, Ambac Assurance may no longer be a member of the U.S. 
federal income tax consolidated group of which Ambac is the 
common parent.

It  is  possible  that  certain  surplus  notes  or  other  obligations  of 
Ambac  Assurance  may  be  characterized  as  equity  of  Ambac 
Assurance for U.S. federal income tax purposes. If such surplus 
notes or other obligations are characterized as equity of Ambac 
Assurance that is taken into account for tax affiliation purposes 
and  it  is  determined  that  such  “equity”  represented  more  than 
twenty percent of the total value of the stock of Ambac Assurance, 
Ambac Assurance may no longer be characterized as an includable 
corporation  that  is  affiliated  with  Ambac.  As  a  result,  Ambac 
Assurance would no longer be characterized as a member of the 
U.S. federal income tax consolidated group of which Ambac is the 
common parent (the “Ambac Consolidated Group”) and Ambac 
Assurance would be required to file a separate consolidated tax 
return  as  the  common  parent  of  a  new  U.S.  federal  income  tax 
consolidated  group  including  Ambac  Assurance  as  the  new 
common parent and Ambac Assurance’s affiliated subsidiaries (the 
“Ambac Assurance Consolidated Tax Group”).

To  the  extent Ambac Assurance  is  no  longer  a  member  of  the 
Ambac  Consolidated  Group,  Ambac  Assurance’s  NOLs  (and 
certain other available tax attributes of Ambac Assurance and the 
other members of the Ambac Assurance Consolidated Tax Group) 
may  no  longer  be  available  for  use  by  the  Ambac  Assurance 
Consolidated Tax Group or any of the remaining members of the 
Ambac Assurance  Consolidated  Tax  Group  to  reduce  the  U.S. 
federal income tax liabilities of the Ambac Assurance Consolidated 
Tax Group. Ambac, Ambac Assurance and their affiliates entered 
into a tax sharing agreement that would require Ambac to make 
certain tax elections that could mitigate the loss of NOLs and other 
tax attributes resulting from a deconsolidation of Ambac Assurance 
from the Ambac Consolidated Group. However, in the event of a 
deconsolidation, certain other benefits resulting from U.S. federal 
income tax consolidation may no longer be available to the Ambac 
Consolidated Group including certain favorable rules relating to 
transactions  occurring  between  members  of 
the  Ambac 
Consolidated  Group  and  members  of  the  Ambac  Assurance 
Consolidated Tax Group.

If surplus notes or other obligations are characterized as equity 
of Ambac Assurance, the Ambac Assurance NOLs (and certain 

other tax attributes or tax benefits of the Ambac Consolidated 
Group) may be subject to limitation under Section 382 of the Tax 
Code.

It is possible that certain surplus notes or other obligations may be 
characterized  as  equity  of  Ambac  Assurance  for  U.S.  federal 
income  tax  purposes.  Such  characterization  could  result  in  an 
“ownership  change”  of  Ambac  Assurance  for  purposes  of 
Section 382 of the Tax Code. If such an ownership change were 
to  occur,  the  value  and  amount  of  the Ambac Assurance  NOLs 
would  be  substantially  impaired,  increasing  the  U.S.  federal 
income tax liability of Ambac Assurance and materially reducing 
the value of Ambac Assurance’s stock owned by Ambac and the 
potential of future cash tolling or dividend payments from Ambac 
Assurance to Ambac.

Deductions with respect to interest accruing on certain surplus 
notes may be eliminated or deferred until payment.

To the extent certain surplus notes are characterized as equity for 
U.S.  federal  income  tax  purposes,  accrued  interest  will  not  be 
deductible by Ambac Assurance. In addition, even if such surplus 
notes  are  characterized  as  debt  for  U.S.  federal  income  tax 
purposes, the deduction of interest accruing on such surplus notes 
may be deferred until paid or eliminated in part depending upon 
(i) the terms of any deferral and payment provisions provided in 
such  surplus  notes,  (ii) whether  such  surplus  notes  have 
“significant original issue discount,” and (iii) the yield to maturity 
of surplus notes. To the extent deductions with respect to interest 
are  eliminated  or  deferred,  the  U.S.  federal  income  tax  of  the 
members of the Ambac Consolidated Group or the members of the 
Ambac Assurance Consolidated Tax Group as the case may be, 
could be increased reducing the amount of cash available to pay 
its obligations.

Changes in Political or Economic Conditions

Implementation  of  the  Tax  Cuts  and  Jobs  Act  may  have 
unexpected or adverse consequences for the Company and the 
value of its securities, particularly its common shares.

On December 22, 2017, new tax legislation, the Tax Cuts and Jobs 
Act, was signed into law.  Amongst other things, the Tax Cuts and 
Jobs Act implemented a sweeping overhaul of the U.S. tax laws 
applicable to corporations.  A major provision of the Tax Cuts and 
Jobs Act was a reduction of the maximum corporate federal income 
tax rate to 21% from 35%, which resulted in the Company reducing 
the value of its net deferred tax asset, the impact of which was 
offset  by  a  change  in  valuation  allowance.   As  a  result  of  the 
reduction in the corporate federal tax rate, the maximum amount 
of  future  tolling  payments  AFG  may  receive  from  Ambac 
Assurance, for tax years beginning with 2018, will also be reduced 
to approximately $56 million from $97 million.  The Tax Cuts and 
Jobs Act also requires U.S. corporations to pay federal income tax 
on previously untaxed foreign earnings accumulated under legacy 
tax laws included in income, for the last taxable year beginning 
before January 1, 2018.  As a result of this and other provisions in 
the Tax Cuts and Jobs Act, Ambac Assurance is expected to make 
additional tax payments in 2017 related to alternative minimum 
tax, which will be refundable in the future. The aforementioned as 
well as other provisions of the Tax Cuts and Jobs Act, such as those 
relating to the limitations on the deductibility of interest expense, 
the Global Tax Intangible Low Taxed Income and Base Erosion 
Anti-Abuse  Tax,  may  also  have  an  adverse  impact  on Ambac 
Assurance’s and/or AFG’s future financial condition and results of 

| Ambac Financial Group, Inc.   25   2017 FORM 10-K |

operations  that  is  difficult  to  predict  at  this  time.  Any  adverse 
impact or the perception of an adverse impact may cause the value 
of Ambac Assurance’s  and/or AFG’s  securities,  particularly  its 
common shares, to decline.

Risks Related to Strategic Plan

Ambac  is  exploring  select  business  opportunities  which  may 
permit utilization of Ambac’s net operating loss carry-forwards; 
however, such business opportunities may not be consummated, 
or  if  consummated,  may  not  create  value  and  may  negatively 
impact our financial results.

Ambac  is  exploring  select  business  opportunities  which  may, 
amongst other things, permit utilization of its net operating loss 
carry-forwards.    Such  business  opportunities,  may  involve  the 
acquisition of assets or existing businesses or the development of 
businesses through new or existing subsidiaries. It is not possible 
at this time to predict the future prospects or other characteristics 
of any such business opportunities. Although we intend to conduct 
business, financial and legal due diligence in connection with the 
evaluation of any future business or acquisition opportunities, there 
can be no assurance our due diligence investigations will identify 
every matter that could have a material adverse effect on us. Efforts 
to  pursue  select  business  opportunities  may  be  unsuccessful  or 
require significant financial or other resources, which could have 
a negative impact on our financial condition. No assurance can be 
given  that  Ambac  will  be  able  to  complete  such  business 
opportunities,  generate  any  earnings  or  be  able  to  successfully 
integrate any such business into our current operating structure.

Moreover, Ambac’s ability to enter new businesses, including new 
businesses  apart  from  Ambac  Assurance,  is  also  subject  to 
significant  doubt,  given  the  financial  condition  of  Ambac 
Assurance,  the  difficulty  of  leveraging  or  monetizing Ambac’s 
other assets, and the uncertainty of its ability to raise capital. Due 
to these factors, as well as those relating to Ambac Assurance as 
described in this Item 1A. Risk Factors, the value of our securities 
is speculative.

Ambac’s current strategy and initiatives have been derived from, 
and created as a consequence of, the company’s current financial 
condition  and  circumstances.  Should  changes  in  Ambac’s 
circumstances or financial condition or in the political, economic 
and/or legal environment occur, there can be no assurances that all 
or any part of such strategy and/or initiatives will not be abandoned 
or amended to take account of such changes. Any such adjustment 
or abandonment may have an adverse effect on our securities.

Ambac UK maintain an office in London, England, which consist 
of 3,514 square feet of office space, under a lease agreement that 
expires in October 2020.

Additionally, Ambac maintains a disaster recovery site as part of 
its Disaster Recovery Plan, which is located approximately 100 
miles from One State Street Plaza under a lease that expires in 
September 2019. This remote warm-back-up facility is complete 
with  user  work  stations,  phone  system,  data  center,  internet 
connectivity and a power generator, capable of serving the needs 
of the disaster recovery team to support all business operations. 
The  plan,  facility  and  systems  are  revised  and  upgraded  where 
necessary, and user tested annually to confirm their readiness. 

Item 3. 

Legal Proceedings

Refer to Notes to the Consolidated Financial Statements—Note 
16. Commitments and Contingencies included in Part II, Item 8 
in this Form 10-K for a discussion on legal proceedings against 
Ambac and its subsidiaries. 

Item 4. 

Mine Safety Disclosures

Not applicable.

PART II

Item 5.  Market  for  Registrant's  Common  Equity, 
Related  Stockholder  Matters  and  Issuer  Purchases  of 
Equity Securities

Market Information 

The Company's common stock is listed on NASDAQ under the 
symbol “AMBC.”   The high and low common stock prices per 
share were as follows:

2017

2016

High

Low

High

Low

Fourth quarter

$

17.79

$

13.17

$

27.25

$

17.75

Third quarter

Second quarter

First quarter

Holders 

22.02

20.28

23.55

16.75

15.67

17.39

19.35

17.77

17.32

15.42

14.42

11.92

On  February 27,  2018,  there  were  29  stockholders  of  record  of 
Ambac’s common stock. 

Item 1B.  Unresolved Staff Comments

Dividends 

None.

Item 2. 

Properties

The executive office of Ambac is located at One State Street Plaza, 
New York, New York 10004, which consists of 103,484 square feet 
of office space, under lease agreements that expire in September 
2019 (77,613 square feet) and December 2029 (25,871 square feet). 
The  lease  expiring  in  September  2019  has  a  provision  that  can 
extend the lease to December 2029.  Ambac leases additional space 
outside of New York for its data center at a secure facility under a 
lease agreement that expires in March 2019. 

The Company did not pay cash dividends on its common stock 
during 2017 and 2016. Information concerning restrictions on the 
payment of dividends from Ambac's insurance subsidiaries is set 
forth in Item 1 above under the caption “Dividend Restrictions, 
Including  Contractual  Restrictions"  and  in  Note  8.  Insurance 
Regulatory Restrictions to the Consolidated Financial Statements 
included in Part II, Item 8 in this Form 10-K. 

Purchases of Equity Securities By the Issuer and Affiliated 
Purchasers 

There were no repurchases of equity securities during the fourth
quarter of 2017.  Ambac does not have a stock repurchase program.

| Ambac Financial Group, Inc.   26   2017 FORM 10-K |

Warrants

On June 30, 2015, the Board of Directors of Ambac authorized the 
establishment of a warrant repurchase program that permits the 
repurchase of up to $10 million of warrants.  On November 3, 2016, 
the  Board  of  Directors  of Ambac  authorized  an  additional  $10 
million to the warrant repurchase program. As of December 31, 

2017, Ambac had repurchased 985,331 warrants at a cost of $8.1 
million, leaving 4,053,670 warrants outstanding with an exercise 
price of $16.67 per share and expiration of April 30, 2023.  The 
remaining aggregate authorization at December 31, 2017 is $11.9
million.

Stock Performance Graph

The following graph compares the performance of an investment in our common stock from the close of business on May 1, 2013, the date 
we emerged from bankruptcy through December 31, 2017, with the Russell 2000 Index and S&P Completion Index. The graph assumes $100 
was invested on May 1, 2013 in our common Stock at the closing price of $20 per share and at the closing price for the Russell 2000 Index 
and S&P Completion Index. It also assumes that dividends (if any) were reinvested on the date of payment without payment of any commissions. 
The performance shown in the graph represents past performance and should not be considered an indication of future performance.

Ambac Financial Group, Inc.

Russell 2000 Index

S&P Completion Index

December 31,

5/1/13

2013

2014

2015

2016

2017

$100

$100

$100

$123

$127

$123

$123

$134

$130

$70

$127

$124

$113

$148

$142

$80

$167

$165

| Ambac Financial Group, Inc.   27   2017 FORM 10-K |

Item 6. 

Selected Financial Data

The following financial information for the five years ended December 31, 2017, has been derived from Ambac’s Consolidated Financial 
Statements.  Following Ambac’s emergence from bankruptcy on May 1, 2013, the consolidated financial statements reflect the application of 
fresh start reporting (“Fresh Start”), incorporating, among other things, the discharge of debt obligations, issuance of new common stock and 
fair  value  adjustments. The  effects  of  the  reorganization  and  Fresh  Start  adjustments  are  recorded  in  Predecessor Ambac’s  Consolidated 
Statement of Total Comprehensive Income for the period ended April 30, 2013. The financial results of the Company for the periods from 
May 1, 2013 are referred to as “Successor” and the financial results for the periods through April 30, 2013 are referred to as “Predecessor”. 
The 2013 Successor Period and the 2013 Predecessor Period are distinct reporting periods.  As a result of the implementation of Fresh Start, 
results and balances are not comparable between Successor Ambac and Predecessor Ambac. This information should be read in conjunction 
with the Consolidated Financial Statements and related notes located in Part II, Item 8 in this Form 10-K. 

($ in millions, except per share data)

2017

2016

2015

2014

Successor Ambac

Year Ended December 31,

Predecessor
Ambac

Period from
Jan 1
through
April 30,
2013

Period from
May 1
through
December 31,
2013

Total Comprehensive Income Highlights:

Gross premiums written

Net premiums earned

Net investment income

Other than temporary impairment losses

Net realized investment gains

Net change in fair value of credit derivatives

Net gains (losses) on interest rate derivatives

Net realized (losses) gains on extinguishment of debt

Income (loss) on Variable Interest Entities ("VIEs")
Losses and loss expenses (benefit) (1)

Interest and underwriting and operating expenses

Insurance intangible amortization

Goodwill impairment

Reorganization items

Pre-tax income (loss)

Net income (loss) attributable to Common
Shareholders

Total comprehensive income attributable to Ambac

Financial Group, Inc.

Net income (loss) per share:

$

(14.3) $

(53.8) $

(37.6) $

(288.3) $

(80.3)

$

175.3

361.0

(20.2)

5.4

16.4

59.6

4.9

19.7

513.2

241.5

150.9

—

—

197.3

313.4

(21.8)

39.3

20.1

(50.3)

4.8

(14.1)

(11.5)

238.0

174.6

—

—

(284.3)

105.0

(328.7)

(335.4)

74.8

20.6

312.6

266.3

(25.7)

53.5

41.7

(42.5)

0.1

31.6

(768.7)

219.2

169.6

514.5

—

510.1

493.4

288.3

246.4

300.9

(25.8)

58.8

23.9

(181.1)

(74.7)

(32.2)

(545.6)

229.0

151.8

—

0.2

493.3

484.1

692.7

213.5

146.4

(46.8)

4.5

192.9

114.8

—

(48.6)

(185.1)

153.7

99.7

—

0.5

512.3

505.2

516.9

(14.1)

130.0

116.7

(0.5)

53.3

(60.4)

(33.7)

—

426.6

(38.1)

75.6

—

—

(2,745.2)

3,348.0

3,349.0

3,523.9

Basic

Diluted

$

$

(7.25) $

(7.25) $

1.66

1.64

$

$

10.92

10.72

$

$

10.73

10.31

$

$

11.23

10.91

$

$

11.07

11.07

(1)  Ambac records the impact of estimated recoveries related to securitized loans in RMBS transactions that breached certain representations and warranties 
within losses and loss expenses (benefit).  The expense (benefit) associated with changes to our estimated recoveries for the years ended December 31, 
2017, 2016, 2015 and 2014, the eight months ended December 31, 2013 and the four months ended April 30, 2013 were $72.0 million, $(71.4) million, 
$(303.6) million, $(481.7) million, $199.4 million, and $(61.6) million, respectively.

| Ambac Financial Group, Inc.   28   2017 FORM 10-K |

($ in millions) December 31

Balance Sheet Highlights:

2017

2016

2015

2014

2013

Total non-variable interest entity investments

$

5,740.8

$

6,500.2

$

5,644.7

$

5,507.0

$

6,523.7

Cash and cash equivalents

Premium receivable

Insurance intangible asset

Goodwill
Subrogation recoverable (1)

Deferred ceded premium

Total VIE assets

Total assets

Unearned premiums
Losses and loss expense reserve (1)

Obligations under investment agreements
Long-term debt (2)

Derivative liabilities

Total VIE liabilities

Total liabilities

Total stockholders’ equity

623.7

586.3

847.0

—

631.2

52.2

14,500.5

23,192.4

783.2

4,745.0

—

991.7

82.8

14,366.4

21,547.1

1,645.3

91.0

661.3

962.1

—

684.7

69.6

13,367.8

22,635.7

967.3

4,380.8

82.4

1,114.4

319.3

13,235.4

20,657.7

1,978.0

35.7

831.6

1,212.1

—

1,229.3

96.8

14,288.5

23,728.1

1,280.3

4,088.1

100.4

1,125.0

353.4

14,259.8

21,769.7

1,958.3

73.9

1,000.6

1,410.9

514.5

953.3

123.3

15,126.1

25,159.9

1,673.8

4,752.0

160.1

971.1

406.9

15,085.7

23,486.1

1,673.7

77.4

1,453.0

1,598.0

514.5

498.5

145.5

15,988.7

27,092.5

2,255.7

5,968.7

359.1

963.2

253.9

15,872.8

26,114.1

978.4

Total liabilities and stockholders' equity

$

23,192.4

$

22,635.7

$

23,728.1

$

25,159.9

$

27,092.5

(1)  Ambac records as a component of its loss reserves and subrogation recoverable, estimated recoveries related to securitized loans in RMBS transactions 
that breached certain representations and warranties.  Ambac has recorded gross estimated recoveries of $1,834.4 million, $1,907.0 million, $2,829.6 
million, $2,523.5 million and $2,206.6 million at December 31, 2017, 2016, 2015, 2014 and 2013, respectively.

(2)  Long-term debt represents surplus notes issued to third parties by Ambac Assurance and the Segregated Account and secured borrowing obligations. In 
2014, Ambac sold a $350.0 million junior surplus note issued to it by the Segregated Account to a newly formed Trust in exchange for cash of $224.3 
million and a subordinated owner trust certificate issued by the Trust. Long-term debt for all years excludes the portion of long-term debt associated with 
variable interest entities. In 2015, Ambac entered into a $146.0 million secured borrowing transaction.

Item 7.   Management’s Discussion and Analysis of Financial Condition and Results of Operations

This Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) contains certain financial measures, 
in particular the presentation of Adjusted Earnings and Adjusted Book Value, which are not presented in accordance with accounting principles 
generally accepted in the United States (“GAAP”). We are presenting these non-GAAP financial measures because they provide greater 
transparency and enhanced visibility into the underlying drivers of our business. We do not intend for these non-GAAP financial measures to 
be a substitute for any GAAP financial measures and they may differ from similar reporting provided by other companies. Readers of this 
Form 10-K should use these non-GAAP financial measures only in conjunction with the comparable GAAP financial measures. Adjusted 
Earnings and Adjusted Book Value are non-GAAP financial measures that adjust for the impact of certain non-recurring or non-economic 
GAAP accounting requirements and include certain items that the Company has or expects to realize in the future, but that are not reported 
under GAAP. We also provide reconciliations to the most directly comparable GAAP measures; Adjusted Earnings to Net income attributable 
to common stockholders and Adjusted Book Value to Total Ambac Financial Group, Inc. stockholders’ equity.

COMPANY OVERVIEW

See Note 1. Background and Business Description for a description 
of the Company and our key strategies to achieve our primary goal 
to maximize shareholder value.

EXECUTIVE SUMMARY

Ambac Assurance and Subsidiaries:

A key strategy for Ambac is to increase the value of its investment 
in Ambac Assurance by actively managing its assets and liabilities.  
Asset management primarily entails maximizing the risk adjusted 
return on non-VIE invested assets and managing liquidity to help 
ensure resources are available to meet operational and strategic 
cash needs.  These strategic cash needs include activities associated 
with Ambac's liability management and loss mitigation programs.  
Management evaluates the potential impact of loss mitigation and 

avoidance strategies in order to target and prioritize policies, or 
portions  thereof,  for  commutation,  refinancing,  restructuring  or 
other risk reduction or defeasance strategies.

Asset Management:

Investment portfolios are subject to internal investment guidelines, 
as well as limits on types and quality of investments imposed by 
applicable insurance laws and regulations. As part of its investment 
strategy, and in accordance with the aforementioned guidelines, 
Ambac Assurance and Ambac Assurance UK Limited ("Ambac 
UK"), purchase distressed Ambac-insured securities based on their 
relative risk/reward characteristics.  The investment portfolios of 
Ambac  Assurance  and  Ambac  UK  also  hold  fixed  income 
securities and funds that include a variety of other assets including, 
but  not  limited  to,  corporate  bonds,  asset  backed  and  mortgage 
backed securities, municipal bonds, high yield bonds, leveraged 
loans, equities, real estate, insurance-linked securities and hedge 

| Ambac Financial Group, Inc.   29   2017 FORM 10-K |

funds.  Refer to Note 10. Investments to the Consolidated Financial 
Statements, included in Part II, Item 8 in this Form 10-K for further 
details of fixed income investments by asset class.

During the year ended December 31, 2017, Ambac (inclusive of 
its  subsidiaries)  acquired  $815.2  million  of  distressed Ambac-
insured securities, including $97.3 million of RMBS and $686.1 
million  of  Puerto  Rico  securities.  Future  cash  flows  relating  to 
those  invested  assets  include  the  sum  of  (i) the  bond’s  intrinsic 
cash  flows  and  (ii) the  estimated Ambac  claim  payments.   At 
December 31,  2017,  Ambac  owned  $2,242.3  million  Ambac-
insured RMBS, which included approximately $1.6 billion, or 41% 
of  the  total  Deferred  Amounts  (as  defined  in  the  Segregated 
Account Rehabilitation Plan) outstanding were attributable, and 
approximately  29%  of  PRIFA  and  58%  of  COFINA  Ambac-
insured  bonds.    Subject  to  applicable  internal  and  regulatory 
guidelines  and  other  constraints,  Ambac  will  continue  to 
opportunistically purchase Ambac-insured securities. 

Liability and Insured Exposure Management:

Ambac  Assurance's  Risk  Management  Group  focuses  on  the 
analysis,  implementation  and  execution  of  commutations,  risk 
reduction  or  defeasance  and  loss  recovery  strategies. Analysts 
evaluate  the  estimated  timing  and  severity  of  projected  policy 
claims  as  well  as  the  potential  impact  of  loss  mitigation  or 
remediation strategies in order to target and prioritize policies, or 
portions thereof, for commutation, refinancing, restructuring  or 
other risk reduction or defeasance strategies. For targeted policies, 
analysts will engage with bondholders, issuers and other economic 
stakeholders  to  negotiate,  structure  and  execute  such  strategies.  
During the 2017, Ambac's successes included:

•  On  March  25,  2017, Ambac  UK  agreed  in  principle  to  a 
confidential settlement of litigation brought by Ambac UK in 
the  name  of  Ballantyne  Re  plc  (“Ballantyne”)  against  J.P. 
Morgan Investment Management Inc. (“JPMIM”) relating to 
the management of Ballantyne’s investment accounts, which 
were  funded  with  the  proceeds  of  notes  issued  in  2006  in 
connection  with  a  structured  reinsurance  transaction  and 
guaranteed in part by Ambac UK.  On April 11, 2017, Ambac 
UK, Ballantyne and JPMIM signed a settlement agreement. 
Pursuant to the settlement, Ballantyne received a payment in 
return for releases of all claims by Ballantyne and Ambac UK. 
Ambac realized a US GAAP benefit through losses and loss 
expenses of approximately $91.6 million in 2017 as a result 
of the settlement, which resulted from the reduction of loss 
and loss expense reserves previously established in relation 
to Ballantyne, and not from a direct cash payment to Ambac 
UK.

•  On  June  27,  2017,  Ambac  Assurance  entered  into  a 
termination  agreement  with  various  parties,  including  a 
special  purpose  entity  Augusta  Funding  Limited  IV 
("Augusta"),  in  connection  with  the  commutation  of  an 
interest rate swap between Augusta and Ambac Assurance's 
wholly-owned 
subsidiary,  Ambac  Financial  Services 
("AFS").  During the second quarter, AFS made net settlement 
payments of approximately $103.6 million, including $94.4 
million under the termination agreement.  At March 31, 2017, 
Ambac  had  recorded  a  mark-to-market  liability  under  this 
swap  transaction  of  $147.0  million  (net  of  an  Ambac 
Assurance  CVA  of  $42.9  million),  resulting  in  a  gain  of 

approximately  $43.4  million  during  2017.    In  July  2017, 
Augusta redeemed its outstanding Ambac Assurance-insured 
debt and Ambac recognized approximately $2.6 million in 
accelerated  premiums  in  2017  relating  to  this  redemption.  
The Ambac-insured Augusta net par outstanding was $185 
million at the time of redemption and was adversely classified.

•  Ambac  U.K.  worked  to  facilitate  an  international  asset-
backed issuer's refinancing of £188.1 million of insured debt 
and which paid Ambac UK a termination premium of £12.6 
million, resulting in accelerated premiums earned of $11.2 
million in 2017; 

•  Ambac worked closely with servicers and owners of Master 
Servicing  Rights  to  exercise  clean-up  calls  on  20  RMBS 
transactions, resulting in a benefit in losses and loss expenses 
of  $21.8  million  and  reducing  adversely  classified  net  par 
exposure by $422.5 million;

•  Ambac  Assurance  commuted  its  policy  on  a  long  time 
distressed municipality ($44.6 million of net par exposure); 
aided in the refinancing of more than 50%  ($144.7 million 
of net par exposure) of its exposure to Chicago, IL Board of 
Education general obligation bonds, resulting in an aggregate 
losses  and  loss  expenses  benefit  of  $4.1  million;  and 
negotiated with a distressed domestic asset-backed VIE that 
was previously consolidated by Ambac to settle all of their 
assets and refinance its Ambac-insured debt ($30.8 million of 
net par exposure).

During  2017, Ambac Assurance  purchased  the  remaining  $4.0 
million of unpaid accrued interest related to certain surplus notes 
that  were  previously  repurchased  under  call  options.    Ambac 
recognized a realized gain on these purchases of $1.1 million in 
the  Consolidated  Statements  of  Total  Comprehensive  Income 
(Loss).

On February 12, 2018, the Second Amended Plan of Rehabilitation 
of  the  Segregated  Account  became  effective  and  Ambac  and 
Ambac  Assurance  consummated  a  series  of  transactions  that 
generally involved (i) the exchange of certain surplus notes held 
by holders of surplus notes that elected to participate in a voluntary 
exchange transaction and (ii) the satisfaction and discharge of all 
Deferred Amounts of the Segregated Account, in each case for an 
effective consideration package comprised of cash, new Secured 
Notes  and  certain  existing  surplus  notes  and  (iii)  the  exit  from 
rehabilitation of the Segregated Account (the “Rehabilitation Exit 
Transactions”).  See Note 1. Background and Business Description
to the Consolidated Financial Statements, included in Part II, Item 
8 in this Form 10-K for details regarding the Rehabilitation Exit 
Transactions. 

The following table provides a comparison of total and adversely 
classified  credits  ("ACC")  net  par  outstanding    in  the  insured 
portfolio at December 31, 2017 and 2016.  Net par exposures within 
the U.S. public finance market includes capital appreciation bonds 
which are reported at the par amount at the time of issuance of the 
insurance policy as opposed to the current accreted value of the 
bonds.

| Ambac Financial Group, Inc.   30   2017 FORM 10-K |

($ in billions)
December 31,

2017

2016

$
Variance

%
Variance

Total

ACC

$

$

62.7

14.1

$

$

79.3

17.0

$

$

(16.6)

(2.9)

(21)%

(17)%

The overall reduction in total net par outstanding resulted from 
scheduled  maturities,  amortizations,  commutations,  refundings, 
refinancings  and  calls,  including  reductions  as  a  result  of  the 
activities of Ambac and its subsidiaries as noted above.

The decrease in adversely classified credit exposures are primarily 
due  to  (i)  calls,  refundings,  and  paydowns  or  negotiated 
refinancings and commutations with a large portion of the decrease 
related  to  residential  mortgage-backed  securities  and  (ii)  the 
upgrade  of  several  remediated  public  finance  transactions, 
partially  offset  by  (iii)  the  downgrades  of  a  Military  Housing 
transaction and an Italian sub-sovereign transaction. Although our 
insured portfolio generally performed satisfactorily in 2017, we 
continued  to  experience  stress  in  certain  sectors  and  insured 
exposures, most notably within our approximately $2.0 billion of 
exposure  to  Puerto  Rico  consisting  of  several  different  issuing 
entities (all adversely classified). Each Puerto Rico issuing entity 
has  its  own  credit  risk  profile  attributable  to  discreet  revenue 
sources,  direct  general  obligation  pledges  and/or    general 
obligation guarantees.  Refer to "Financial Guarantees in Force" 
below in this Management Discussion and Analysis regarding the 
different  issuing  entities  that  encompass Ambac's  exposures  to 
Puerto Rico.

In 2017, Ambac established a new non-adversely classified credit 
category  of  watch  list.    Watch  list  credits  are  currently  fully 
performing  but  demonstrate  the  potential  for  future  material 
adverse development due to such factors as long-term uncertainty 
about a particular sector, a certain structural element related to the 
issuer  or 
transaction,  or  overall  financial  and  economic 
sustainability.   Total  net  par  exposures  of  watch  list  credits  are 
$11.1 billion at December 31, 2017.

Ambac: 

As of December 31, 2017 total cash and investments of Ambac 
were $368.2 million, which include the following:

•  Asset backed and short-term securities of $96.3 million 

•  Ambac-insured securities with a fair value of $5.9 million 

•  Ambac Assurance surplus notes with a fair value of $201.3 

million, which are eliminated in consolidation

•  Residual equity interest in the Corolla Trust that was created 
in  2014  to  monetize Ambac's  ownership  interest  in  junior 
surplus  notes  issued  by  the  Segregated Account.   Ambac 
carries this interest using the equity method.  Additionally, at 
December 31, 2017 Ambac held $35.0 million par amount of 
the  debt  issued  by  this  VIE.    The  total  carrying  value  of 
Ambac's equity and debt interests in Corolla Trust was $64.7 
million  at  December 31,  2017.    Refer  to  Note  3.  Special 
Purpose Entities, Including Variable Interest Entities to the 
Consolidated Financial Statements included in Part II, Item 8 
in this Form 10-K, for more information on the Corolla Trust.    

During 2017, Ambac purchased ($101.8 million) and exchanged 
Ambac-insured bonds (fair value of $79.3 million) to extinguish 

(on a consolidated basis) $108.1 million par of Ambac Assurance 
surplus notes and $39.1 million par of Segregated Account surplus 
notes.    Ambac  recognized  $3.8  million  of  gains  on  the 
extinguishment of debt in the Consolidated Statements of Income 
(Loss)  as  a  result  of  these  transactions  during  the  year  ended 
December 31, 2017. 

As a result of positive taxable income at Ambac Assurance in 2016, 
Ambac received $28.7 million in tax tolling payments in May 2017. 
As  a  result  of  filing  its  2016  tax  return,  Ambac  received  an 
additional $0.6 million of  tolling payments in December 2017.   
For the year ended December 31, 2017, $30.5 million of tolling 
payments were accrued which are expected to be paid to Ambac 
no later than forty-five days after April 15, 2018.  There are no 
assurances that Ambac Assurance will be able to generate taxable 
income  and  therefore  make  tolling  payments  to Ambac  in  the 
future, which may ultimately constrain Ambac's access to capital 
and liquidity to support it operations and strategic initiatives. 

Financial Statement Impacts of Foreign Currency:

The  impact  of  foreign  currency  as  reported  in  Ambac's 
Consolidated Statement of Total Comprehensive Income for the 
year ended December 31, 2017 included the following:

($ in millions)
Net income (1)

$

Changes in other comprehensive income:

Gain (losses) on foreign currency translation

Unrealized gains (losses) on non-functional
currency available-for-sale securities

Total changes in other comprehensive income

Impact on total comprehensive income (loss)

$

21.1

73.6

(19.7)

53.9

75.0

(1)  A portion of Ambac UK's, and to a lesser extent Ambac Assurance's,  
assets  and  liabilities  are  denominated  in  currencies  other  than  its 
functional  currency  and  accordingly,  we  recognized  net  foreign 
currency transaction gains/(losses) as a result of changes to foreign 
currency  rates  through  our  Consolidated  Statement  of  Total 
Comprehensive Income (Loss).  Refer to Note 2. Basis of Presentation 
and Significant Accounting Policies to the Consolidated Financial 
Statements included in Part II, Item 8 in this Form 10-K for further 
details on transaction gains and losses.

Future changes to currency rates may adversely affect our financial 
results.  Refer to Part II, Item 7A "Quantitative and Qualitative 
Disclosures  about  Market  Risk"  for  further  information  on  the 
impact  of  future  currency  rate  changes  on  Ambac's  financial 
instruments.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Ambac's Consolidated Financial Statements have been prepared 
in  accordance  with  GAAP.    This  section  highlights  accounting  
estimates  management  views  as  critical  because  they  require 
management to make difficult and subjective judgments regarding 
matters that are inherently uncertain and subject to change. These 
estimates are evaluated on an on-going basis based on historical 
developments,  market  conditions,  industry  trends  and  other 
information that is reasonable under the circumstances. There can 
be no assurance that actual results will conform to estimates and 
that reported results of operations will not be materially adversely 
affected  by  the  need  to  make  future  accounting  adjustments  to 
reflect changes in these estimates from time to time.

| Ambac Financial Group, Inc.   31   2017 FORM 10-K |

Management  has  identified  the  following  critical  accounting 
policies  and  estimates:  (i) valuation  of  loss  and  loss  expense 
reserves,  (ii) valuation  of  certain  financial  instruments  and 
(iii) valuation of deferred tax assets. Management has discussed 
each of these critical accounting policies and estimates with the 
Audit Committee, including the reasons why they are considered 
critical and how current and anticipated future events impact those 
determinations. Additional information about these policies can be 
found in Note 2. Basis of Presentation and Significant Accounting 
Policies to the Consolidated Financial Statements included in Part 
II, Item 8 in this Form 10-K. 

Valuation of Losses and Loss Expense Reserves:

The loss and loss expense reserves ("loss reserves") discussed in 
this  section  relate  only  to  Ambac’s  non-derivative  insurance 
policies  issued  to  beneficiaries,  including  unconsolidated VIEs. 
Ambac's  loss  reserves  include  loss  reserve  components  of  an 
insurance policy, including unpaid claims and the present value 
("PV") of expected net cash flows required to be paid under an 
insurance contract. Unpaid claims, which include accrued interest, 
represent claims that were not paid for policies allocated to the 
Segregated Account. The PV of expected net cash flows represents 
the PV of expected cash outflows less the PV of expected cash 
inflows  discounted  at  a  risk-free  discount  rate.    While  unpaid 
claims are known and therefore  not a subjective estimate, expected 
future  losses,  net  of  expected  future  recoveries,  are  inherently 
uncertain.  As  such,  the  remaining  discussion  is  limited  to 
addressing  expected  future  losses,  net  of  expected  future 
recoveries.

The  evaluation  process  for  expected  future  losses  is  subject  to 
certain  estimates  and  judgments  regarding  the  probability  of 
default  by  the  issuer  of  the  insured  security,  probability  of 
remediation  and  settlement  outcomes  (which  may  include 
commutation,  litigation  settlements,  refinancings  and/or  other 
settlement  outcomes),  probability  of  a  restructuring  outcome 
(which may include payment moratoriums, debt haircuts and/or 

subsequent recoveries) and the expected loss severity of credits for 
each insurance contract.

As the probability of default for an individual credit increases and/
or the severity of loss given a default increases, our loss reserve 
for that insured obligation will also increase. Political, economic, 
credit or other unforeseen events could have an adverse impact on 
default probabilities and loss severities. The loss reserves for many 
transactions  are  derived  from  the  issuer’s  creditworthiness.  For 
public  finance  issuers,  loss  reserves  will  consider  not  only 
creditworthiness but also political dynamics and economic status 
and prospects. The loss reserves for other transactions which have 
no direct issuer support, such as most structured finance exposures, 
including RMBS and student loan exposures, are derived from the 
default  activity  and  loss  given  default  of  underlying  collateral 
supporting the transactions. In addition, many transactions have a 
combination of issuer/entity and collateral support. Loss reserves 
reflect our assessment of the transaction’s overall structure, support 
and expected performance. Loss reserve volatility will be a direct 
result of the credit performance of our insured portfolio, including 
the number, size, bond types and quality of credits included in our 
loss reserves as well as our ability to execute workout strategies 
and commutations. The number and severity of credits included in 
our loss reserves depend to a large extent on transaction specific 
attributes, but will generally increase during periods of economic 
stress  and  decline  during  periods  of  economic  prosperity. 
Reinsurance contracts mitigate our loss reserve but since  Ambac 
has little exposure ceded to reinsurers, the existing  reinsurance 
contracts are unlikely to have a significant effect on loss reserve 
volatility.   However, entrance into new reinsurance contracts may 
impact loss reserve volatility.  Loss reserve volatility will also be 
materially  impacted  by  changes  in  interest  rates  from  period  to 
period.

The table below indicates the gross par outstanding and gross loss 
reserves (including loss expenses) related to policies in Ambac’s 
loss and loss expense reserves at December 31, 2017 and 2016: 

($ in millions) December 31

RMBS

Domestic Public Finance

Student Loans

Ambac UK

All other credits

Loss expenses

Totals

2017

2016

Gross Par
Outstanding(1)(2)

Gross Loss and 
Loss Expense
Reserves(1)(3)(4)(5)

Gross Par
Outstanding(1)(2)

Gross Loss and 
Loss Expense
Reserves(1)(3)(4)(5)

$

$

5,243

$

4,265

701

941

537

—

2,598

$

816

308

286

17

89

6,756

$

4,410

728

939

567

—

2,394

547

279

388

13

75

11,687

$

4,114

$

13,400

$

3,696

(1)  Ceded par outstanding on policies with loss reserves and ceded loss and loss expense reserves are $590 and $41, respectively, at December 31, 2017 and 
$607 and $31, respectively at December 31, 2016. Ceded loss and loss expense reserves are included in Reinsurance recoverable on paid and unpaid losses. 
(2)  Gross Par Outstanding includes capital appreciation bonds, which are reported at the par amount at the time of issuance of the insurance policy as opposed 

to the current accreted value of the bond.

(3)  Loss and Loss Expense reserves at December 31, 2017 of $4,114 are included in the balance sheet in the following line items: Loss and loss expense 
reserves: $4,745 and Subrogation recoverable: $631. Loss and Loss Expense reserves at December 31, 2016 of $3,696 are included in the balance sheet in 
the following line items: Loss and loss expense reserves: $4,381 and Subrogation recoverable: $685. 

(4)  Included in Gross Loss and Loss Expense Reserves are unpaid claims of $3,867 and $3,656 at December 31, 2017 and 2016, respectively, related to policies 

allocated to the Segregated Account, inclusive of accrued interest payable on Deferred Amounts of $840 and $662, respectively. 

(5)  Ambac records as a component of its loss and loss expense reserves, estimated recoveries related to securitized loans in RMBS transactions that breached 
certain representations and warranties.  Ambac has recorded gross estimated recoveries of $1,834 and $1,907 at December 31, 2017 and 2016, respectively.

| Ambac Financial Group, Inc.   32   2017 FORM 10-K |

See  Note  2.  Basis  of  Presentation  and  Significant  Accounting 
Policies  for  a  description  of  the  cash  flow  and  statistical 
methodologies used to develop loss reserves.   Most of our reserved 
credits  with  large  loss  reserves  utilize  the  cash  flow  method  of 
reserving.    Alternative  cash  flow  scenarios  are  developed  to 
represent  the  range  of  possible  outcomes  and  resultant  future 
claims  payments  and  timing.    Scenarios  and  probabilities  are 
adjusted  regularly  to  reflect  changes  in  status,  outlook  and  our 
analysis and views.  Significant judgment is used to develop the 
cash  flow  assumptions,  and  there  can  be  no  certainty  that  the 
modeled scenarios or probabilities will not deviate materially from 
ultimate outcomes.  

In  some  cases,  such  as  RMBS  and  student  loans,  which  are 
described  more  fully  below,  cash  flow  projections  include  the 
modeling of an issuer or transaction’s future revenues and expenses 
to  determine  the  resources  available  to  pay  debt  service  on  our 
insured obligations.  In other cases, such as many public finance 
exposures  including  our  Puerto  Rico  exposures,  we  do  not 
specifically forecast resources available to pay debt service in the 
cash flow model itself.  Rather, we consider the issuers’ overall 
ability  and  willingness  to  pay,  including  the  existing  fiscal, 
economic,  legal  and  political  framework.    We  then  develop 
multiple scenarios where issuer debt service is paid, missed and/
or haircut with claims paid then modeled for any recovery amount 
and timing.  In our experience, this has been an effective approach 
to loss reserving these types of credits, but there is no certainty our 
assumptions as to scenarios or probabilities will not be subject to 
material changes as developments occur or that this method will 
be as effective in the future as it has been in the past.

In estimating loss reserves, we also incorporate scenarios which 
represent  the  potential  outcome  of  remediation  strategies. 
Remediation scenarios may include the following; (i) a potential 
refinancing of the transaction by the issuer; (ii) the issuer’s ability 
to redeem outstanding securities at a discount, thereby increasing 
the structure’s ability to absorb future losses; and (iii) our ability 
to  terminate  or  restructure  the  policy  in  whole  or  in  part  (e.g., 
commutation).  The  remediation  scenarios  and  the  related 
probabilities of occurrence vary by policy depending on on-going 
and  expected  discussions  and  negotiations  with  issuers  and/or 
investors.  In  addition  to  commutation  negotiations  that  are 
underway with various counterparties in various forms, our reserve 
estimates may also include scenarios which incorporate our ability 
and/or  expectation  to  commute  additional  exposure  with  other 
counterparties. 

RMBS Expected Loss Estimate

Ambac  insures  RMBS  transactions  collateralized  by  first-lien 
mortgages. Ambac classifies its insured first-lien RMBS exposure 
principally into two broad credit risk classes: mid-prime (including 
Alt-A,  interest  only,  and  negative  amortization)  and  sub-prime. 
Mid-prime loans were typically made to borrowers who had credit 
profiles  stronger  than  sub-prime  loans,  but  weaker  than  prime 
loans. Compared with mid-prime loans, sub-prime loans typically 
had higher loan-to-value ratios, reflecting the greater difficulty that 
sub-prime  borrowers  have  in  making  down  payments  and  the 
propensity of these borrowers to extract equity during refinancing. 

Ambac  has  also  insured  RMBS  transactions  collateralized 
predominantly by second-lien mortgage loans such as closed-end 
seconds and home equity lines of credit. A second-lien mortgage 

loan is a type of loan in which the borrower uses the equity in their 
home as collateral and the second-lien loan is subordinate to the 
first-lien loan outstanding on the home. Borrowers are obligated 
to make monthly payments on both their first and second-lien loans. 
If the borrower defaults on the payments due under these loans and 
the property is subsequently liquidated, the liquidation proceeds 
are first utilized to pay off the first-lien loan (as well as other costs) 
and any remaining funds are applied to pay off the second-lien 
loan. As a result of this subordinate position to the first-lien loan, 
second-lien loans carry a significantly higher severity in the event 
of a loss, approaching or exceeding 100%. 

Ambac  primarily  utilizes  a  statistically  based  cash  flow  model 
(“RMBS  cash  flow  model”)  to  develop  estimates  of  projected 
losses for both our first and second lien transactions. The RMBS 
cash flow model projects collateral performance utilizing: (i) the 
transaction’s  underlying 
loans'  characteristics  and  status, 
(ii) projected home price appreciation (“HPA”) and (iii) projected 
interest rates. We source HPA projections from a market accepted 
vendor  and  interest  rate  projections  are  developed  from  market 
sources. We generally utilize waterfall projections from a market 
accepted  vendor  which  models  securitization  deal  structures. In 
some cases, we may utilize an alternative waterfall structure when 
our legal and commercial analysis of the transaction’s payment 
structure differs from the vendor’s waterfall structure. 

We  compare  monthly  claims  submitted  against  the  trustees’ 
reports,  third-party  provided  waterfall  projections  and  our 
understanding of the transactions’ structures to identify and resolve 
discrepancies.  We  also  systematically  review  the  vendor’s 
identify  material 
published  waterfall  revisions 
discrepancies.  Resolving  discrepancies  is  challenging  and  may 
take place over an extended period of time. Moreover, transaction 
documents are subject to interpretation, and our interpretation or 
that of the vendor and as reflected in our loss reserves may prove 
to be incorrect and/or not consistent with trustees directing cash 
flows in the future. 

to  further 

In our experience, market performance and model characteristics 
change and therefore need to be updated and reflected in our models 
through  time. As  such,  we  conduct  regular  reviews  of  current 
models,  alternative  models  and  the  overall  approach  to  loss 
estimation. In particular, the RMBS cash flow model is subject to 
ongoing refinements and/or replacement resulting from industry 
research as well as performance analysis that may better inform 
model assumptions, improvements to modeling capabilities and 
approaches and other factors. 

Second-Lien Model: 

The RMBS cash flow model estimates mortgage loan collateral 
performance, the effect of such collateral cash flows within the 
transaction  waterfall  and  the  liability  structure  we  insure. 
Collateral  performance  is  frequently  modeled  at  the  deal  level 
given  the  paucity  of  mortgage  loan  level  data  for  second-lien 
transactions. In the absence of specific loan-level information, the 
deal-level approach evaluates a loan pool as if it were a single loan, 
selecting  certain  aggregated  deal-level  characteristics  to  then 
perform  a  series  of    statistical  analyses.  We  use  three  HPA 
projection scenarios to develop a base case as well as stress and 
upside cases. The highest probability is assigned to the base case, 
with lower probabilities to the stress and upside cases. This deal-
level  approach  takes  relatively  complicated  monthly  collateral 

| Ambac Financial Group, Inc.   33   2017 FORM 10-K |

performance and divides it into two parts: a borrower-behavior-
dependent stage and a servicer-behavior-dependent stage. 

has a negligible benefit to loss reserves for the remaining three 
transactions with pool-level mortgage insurance. 

The borrower-behavior-dependent stage is designed to forecast the 
probability of a loan’s present delinquency status transitioning to 
any  of  eight  future  statuses.  The  deal-level  approach  projects 
performance using a roll-rate that evaluates the possible future state 
of a loan based on its current status and three variables: average 
FICO (credit score), average current consolidated loan to value 
ratio  (“CLTV”)  and  an  overall  quality  indicator.  The  servicer-
behavior-dependent stage governs a loan’s life cycle after it reaches 
180 or more days delinquent. This stage evaluates the servicer’s 
propensity  to  foreclose  or  pursue  a  short  sale,  the  speed  of  the 
foreclosure  process,  and  the  speed  of  the  post-foreclosure 
distressed  property  liquidation.  The  transition  probabilities 
between stages are assumed by the model to depend upon how 
long a loan has already been in a particular status, as well as on 
the servicer-specific and state-specific liquidation (e.g.,  a judicial 
or statutory foreclosure state) timeline factors. 

First-Lien Model: 

For most first-lien transactions, the RMBS cash flow model utilizes 
mortgage  loan  level  data  from  recognized  market  sources  to 
calculate  probability  of  default  and  prepayment  based  on  loan 
characteristics. The loan-level approach of the RMBS cash flow 
model uses results of a regression analysis to project prepayment 
and default vectors on a monthly basis. For first-lien transactions 
that do not have loan-level data available, we use the deal-level 
approach of the model that is described in the Second-Lien section 
above. 

There are three general stages with the loan-level approach of the 
model:  current,  prepayment  or  default.  The  model  then  looks 
beyond the stages to assess a set of loans based on a number of 
individual characteristics that are distinct to that set of loans. The 
model  will  project  performance  based  on  the  borrower’s  given 
probability  of  transitioning  that  month.  Servicer  behavior  is  a 
variable  in  the  loan-level  approach;  computing  the  impact  of 
servicing on the associated collateral. Consistent with the second-
lien modeling, we consider three HPA scenarios in the RMBS cash 
flow model to develop a base case as well as stress and upside 
cases. The highest probability is assigned to the base case, with 
lower probabilities to the stress and upside cases. 

Other RMBS Factors: 

Additional factors that may impact ultimate RMBS second-lien 
and first-lien losses include, but may not be limited to, mortgage 
insurance, servicer intervention and third-party settlements. 

Mortgage insurance:  Three of our mortgage-backed transactions 
have  active  pool-level  mortgage  insurance;  which  consists  of  a 
master  policy  issued  to  the  mortgage  securitization  trust  that 
indemnifies the trust either on a first loss or mezzanine basis in the 
event  that  covered  mortgage  loans  in  the  trust  default.  The 
mortgage insurance master policy includes various conditions such 
as exclusions, conditions for notification of loans in default and 
claims  settlement.  We  have  noted  with  regard 
these 
securitization  trusts,  payments  by  mortgage  insurers  of  claims 
presented  by  the  securitization  trusts  have  been  inconsistent, 
resulting  in  higher  claims  presented  under Ambac Assurance’s 
financial guarantee policies.  The pool-level mortgage insurance 

to 

Servicer Intervention: We include in our modeling the steps which 
Ambac is taking to address shortcomings in servicing performance. 
Ambac  has  initiated  programs  with  selected  servicers  that  we 
believe  will  mitigate  losses  on  such  transactions  through 
intervention  strategies  such  as  loan  modifications,  improved 
liquidation timelines and short sales. Ambac believes these are the 
principal controllable factors that will result in reduced losses over 
time. Given the uncertainty in initiating additional programs of this 
nature, we give credit in our models only on exposures that have 
already  transferred  servicing  or  entered  into  special  servicing 
agreements. 

Third  party  settlements:  To  the  extent  that  we  are  aware  of 
settlements between issuers and investors or trustees which may 
provide for recoveries within certain insured RMBS trusts, we have 
incorporated in our modeling of collateral losses our estimate of 
the probable amount and timing of these settlements. 

Expected Representation and Warranty Subrogation Recoveries 

Ambac  records  as  a  component  of  its  loss  reserve  estimate 
subrogation  recoveries  related  to  securitized  loans  in  RMBS 
transactions that breached certain representations and warranties 
("R&W") described herein. Generally, the sponsor of an RMBS 
transaction provided representations with respect to the securitized 
loans,  including  representations  with  respect  to  the  loan 
characteristics, the absence of borrower fraud in the underlying 
loan  pools  or  other  misconduct  in  the  origination  process  and 
attesting  to  the  compliance  of  loans  with  the  prevailing 
underwriting policies.  In such cases, the sponsor of the transaction 
is  contractually  obligated  to  repurchase,  cure  or  substitute 
collateral  for  any  loan  that  breaches  the  representations  or 
warranties 

The  RMBS  R&W  subrogation  recovery  estimate  is  subject  to 
significant  uncertainty,  including  risks  inherent  in  litigation, 
collectability  of  such  amounts  from  counterparties  and/or  their 
respective  parents  and  affiliates,  timing  of  receipt  of  any  such 
recoveries, intervention by OCI which could impede our ability to 
take actions required to realize such recoveries and uncertainties 
inherent  in  the  assumptions  used  in  estimating  such  recoveries.  
Refer to Note 2. Basis of Presentation and Significant Accounting 
Policies and Note 7. Financial Guarantee Insurance Contracts to 
the Consolidated Financial Statements included in Part II, Item 8 
in this Form 10-K for more information regarding the estimation 
process for representation and warranty subrogation recoveries. 

Student Loan Expected Loss Estimate 

The  student  loan  portfolio  consists  of  credits  collateralized 
by private student loans.  The calculation of loss reserves for our 
student loan portfolio involves evaluating numerous factors that 
can  impact  ultimate  losses.  The  factor  which  contributes  the 
greatest  degree  of  uncertainty  in  ascertaining  appropriate  loss 
reserves is the long  final legal maturity date of the insured bonds. 
Most of the student loan bonds which we insure were issued with 
original terms of 20 to 40 years until final maturity. Since our policy 
covers  timely  interest  and  ultimate  principal  payment,  our  loss 
projections must make assumptions for many factors covering a 
long  time  horizon.  Key  assumptions  that  will  impact  ultimate 
losses  include,  but  are  not  limited  to,  the  following:  collateral 

| Ambac Financial Group, Inc.   34   2017 FORM 10-K |

performance  (which  is  highly  correlated  to  the  economic 
environment),  interest  rates,  operating  risks  associated  with  the 
issuer,  servicers,  special  servicers,  and  administrators,  investor 
appetite for tendering or commuting insured obligations and, as 
applicable, Ambac’s ability and willingness to commute policies. 
In addition, we consider in our student loan loss projections the 
potential impact, if any, of proposed or final regulatory actions or 
orders, including by the Consumer Financial Protection Bureau 
("CFPB"), affecting our insured transactions.

In evaluating our student loan portfolio, our losses are projected 
using a cash flow modeling approach. In order to project collateral 
performance under the cash flow approach, we use an internally 
developed default projection tool that constructs lifetime cohort 
default curves based on loan and deal-level historical performance 
data.  To determine ultimate losses on the transactions, the cohort 
default  curves  are  used  to  extrapolate  future  default  behavior.  
Additionally,  a  regression-based  model  is  used  to  estimate 
recoveries  on  defaulted  loans.    This  regression-based  recovery 
forecast is grounded in deal-level performance data.  Losses for 
one  of  the  student  loans  deals  is  forecast  using  internal  loss 
estimations  to  project  transaction-level  assumptions  such  as 
defaults,  recoveries  and  prepayments  based  on  analysis  of 
historical experience adjusted for current economic conditions and 
changes  to  collateral  composition  since  origination.    In  both 
approaches  where  collateral  performance  is  projected,  the 
transaction  losses  are  incorporated  into  a  third  party  waterfall 
model to develop loss estimates for our exposures. This waterfall 
model allows us to capture the impact of each transaction’s specific 
structure  (e.g.,  the  waterfall  priority  of  payments,  triggers, 
redemption  priority)  to  generate  our  specific  projected  claims 
profile in various base, upside and downside scenarios. 

We develop and assign probabilities to multiple cash flow scenarios 
based on each transaction’s unique characteristics. Probabilities 
assigned  are  based  on  available  data  related  to  the  credit, 
information from contact with the issuer (if applicable), and any 
economic or market information that may impact the outcomes of 
the  various  scenarios  being  evaluated.  Our  base  case  usually 
projects  deal  performance  out  to  maturity  using  expected  loss 
assumptions. As  appropriate,  we  also  develop  other  cases  that 
incorporate  various  upside  and  downside  scenarios  that  may 
include changes to defaults and recoveries. 

Variability of Expected Losses and Recoveries

Ambac’s  management  believes  that  the  estimated  future  loss 
component of loss reserves are adequate to cover future claims 
presented, but there can be no assurance that the ultimate liability 
will not be higher than such estimates. 

It  is  possible  that  our  estimated  future  loss  assumptions  for 
insurance policies discussed above could be understated. We have 
attempted  to  identify  possible  cash  flows  using  more  stressful 
assumptions than the probability-weighted outcome recorded. The 
possible net cash flows consider the highest stress scenario that 
was  utilized  in  the  development  of  our  probability-weighted 
expected loss at December 31, 2017 and assumes an inability to 
execute  any  commutation  transactions  with  issuers  and/or 
investors.  Such  stress  scenarios  are  developed  based  on 
management’s view about all possible outcomes.  In arriving at 
such view, management makes considerable judgments about the 
possibility of various future events.  Although we do not believe 

it is possible to have worst case outcomes in all cases, it is possible 
we could have worst case outcomes in some or even many cases.

RMBS Variability:

Changes  to  assumptions  that  could  make  our  reserves  under-
estimated  include  an  increase  in  interest  rates,  deterioration  in 
housing prices, poor servicing, the effect of a weakened economy 
characterized by growing unemployment and wage pressures, and/
or illiquidity of the mortgage market. We utilize a model to project 
losses  in  our  RMBS  exposures  and  changes  to  reserves,  either 
upward or downward are not unlikely if we used a different model 
or methodology to project losses. We regularly assess models and 
methodologies  and  may  change  our  approach  and/or  model.  
Additionally,  our  R&W  actual  subrogation  recoveries  could  be 
significantly  lower  than  our  estimate  of  $1,834  million  as  of 
December 31, 2017 if the sponsors of these transactions: (i) fail to 
honor  their  obligations  to  repurchase  the  mortgage  loans, 
(ii) successfully dispute our breach findings, (iii) no longer have 
the  financial  means  to  fully  satisfy  their  obligations  under  the 
transaction documents, or (iv) our pursuit of recoveries is otherwise 
unsuccessful. 

In the case of both first and second-lien exposures, the possible 
stress case assumes a lower housing price appreciation projection, 
which  in  turn  drives  higher  defaults  and  severities.  Using  this 
approach, the possible increase in loss reserves for RMBS credits 
for which we have an estimate of expected loss at  December 31, 
2017  could  be  approximately  $50  million.    Combined  with  the 
absence of any R&W subrogation recoveries, a possible increase 
in loss reserves for RMBS could be approximately $1.9 billion.   
Additionally,  loss  payments  are  sensitive  to  changes  in  interest 
rates, increasing as interest rates rise.  For example an increase in 
interest  rates  of  0.50%  could  increase  our  estimate  of  expected 
losses by approximately $60 million.  There can be no assurance 
that losses may not exceed such amounts.

Public Finance Variability:

It is possible our loss reserves for public finance credits may be 
under-estimated if issuers are faced with prolonged exposure to 
adverse  political,  economic,  fiscal  or  socioeconomic  events  or 
trends.

Our experience with the city of Detroit in its bankruptcy proceeding 
was not favorable and renders future outcomes with other public 
finance issuers even more difficult to predict and may increase the 
risk that we may suffer losses that could be sizable.  We agreed to 
settlements regarding our insured Detroit general obligation bonds 
that provide better treatment of our exposures than the city planned 
to include in its plan of adjustment, but nevertheless required us 
to  incur  a  loss  for  a  significant  portion  of  our  exposure.   An 
additional troubling precedent in the Detroit case, as well as other 
municipal  bankruptcies,  is  the  preferential  treatment  of  certain 
creditor  classes,  especially  the  public  pensions.    The  cost  of 
pensions and the need to address frequently sizable unfunded or 
underfunded  pensions  is  often  a  key  driver  of  stress  for  many 
municipalities and their related authorities, including entities to 
whom we have significant exposure, such as Chicago, its school 
district, the State of New Jersey and many others.  Less severe 
treatment of pension obligations in bankruptcy may lead to worse 
outcomes for traditional debt creditors.  In addition, cities may be 
more inclined to use bankruptcy to resolve their financial stresses 

| Ambac Financial Group, Inc.   35   2017 FORM 10-K |

if they believe preferred outcomes for various creditor groups can 
be achieved.

We expect municipal bankruptcies and defaults to continue to be 
challenging to project given the unique political, economic, fiscal, 
governance and public policy differences among municipalities as 
well as the complexity, long duration and relative infrequency of 
the cases themselves in forums with a scarcity of legal precedent.

Another potentially adverse development that could cause the loss 
reserves  on  our  public  finance  credits  to  be  underestimated  is 
deterioration in the municipal bond market, resulting from reduced 
or no access to alternative forms of credit (such as bank loans) or 
other exogenous factors, such as the Tax Cuts and Jobs Act that 
was signed into law on December 22, 2017, which could potentially 
reduce municipal investor appetite for tax-exempt municipal bonds 
by corporate investors and over the longer term could potentially 
put additional pressure on issuers in states with high state and local 
taxes. These factors could deprive issuers access to funding at a 
level necessary to avoid defaulting on their obligations. While our 
loss reserves consider our judgment regarding issuers’ financial 
flexibility to adapt to adverse markets, they may not adequately 
capture  sudden,  unexpected  or  protracted  uncertainty  that 
adversely affects market conditions.

Our  exposures  to  the  Commonwealth  of  Puerto  Rico  are  under 
stress arising from the Commonwealth’s poor financial condition, 
weak  economy,  loss  of  capital  markets  access  and  the  severe 
damage caused by hurricanes Irma and Maria.  These factors, taken 
together with the payment moratorium on debt payments of the 
Commonwealth  and  its  instrumentalities,    ongoing  Puerto  Rico 
Oversight,  Management, 
and  Economic  Stability  Act 
("PROMESA") Title III proceedings, and certain other provisions 
under PROMESA, the potential for a restructuring of debt insured 
by Ambac Assurance, either with or without its consent, and the 
possibility of protracted litigation as a result of which its rights 
may be materially impaired, may cause losses to exceed current 
reserves in a material manner. See "Financial Guarantees in Force" 
below  for  further  details  on  the  legal,  economic  and  fiscal 
developments  that  have  impacted  or  may  impact  Ambac 
Assurance’s insured Puerto Rico bonds. 

For public finance credits, including Puerto Rico as well as other 
issuers,  for  which  we  have  an  estimate  of  expected  loss  at 
December 31, 2017, the possible increase in loss reserves could 
be approximately $1.5 billion.  However, there can be no assurance 
that losses may not exceed such amount.   

Student Loan Variability:

Changes  to  assumptions  that  could  make  our  reserves  under-
estimated include, but are not limited to, increases in interest rates, 
default rates and loss severities on the collateral due to economic 
or  other  factors. Such  factors  may  include  lower  recoveries  on 
defaulted loans or additional losses on collateral or trust assets, 
including as a result of any enforcement actions of the Consumer 
Finance Protection Bureau. For student loan credits for which we 
have  an  estimate  of  expected  loss  at  December 31,  2017,  the 
possible  increase  in  loss  reserves  could  be  approximately  $100 
million. Additionally, an increase in interest rates of 0.50% could 
increase  our  estimate  of  expected  losses  by  approximately  $35 
million.  There can be no assurance that losses may not exceed 
such amount.   

Other Credits, including Ambac UK, Variability:

It is possible our loss reserves on other types of credits, including 
those insured by Ambac UK, may be under-estimated because of 
various risks that vary widely, including the risk that we may not 
be  able  to  recover  or  mitigate  losses  through  our  remediation 
processes. For all other credits, including Ambac UK, for which 
we have an estimate of expected loss, the sum of all the highest 
stress case loss scenarios is approximately $250 million greater 
than the loss reserves at December 31, 2017. However, there can 
be no assurance that losses may not exceed such amount.  

Valuation of Certain Financial Instruments:

The Fair Value Measurement Topic of the ASC requires financial 
instruments  to  be  classified  within  a  three-level  fair  value 
hierarchy.  The  fair  value  hierarchy,  the  financial  instruments 
classified  within  each  level,  our  valuation  methods,  inputs, 
assumptions and the review and validation procedures over quoted 
and modeled pricing are further detailed in  Note 9. Fair Value 
Measurements to the Consolidated Financial Statements included 
in Part II, Item 8 in this Form 10-K.  

The level of judgment in estimating fair value is largely dependent 
on the amount of observable market information available to fair 
value a financial instrument, which is also determinative of where 
the financial instrument is classified in the fair value hierarchy.  
Level  3  instruments  are  valued  using  models  which  use  one  or 
more significant inputs or value drivers that are unobservable and 
therefore  require  significant 
judgment.  Level  3  financial 
instruments which are material include certain interest rate swaps, 
investments in certain Ambac-insured fixed income securities, and 
certain  VIE  assets  and  liabilities.  Model-derived  valuations  of 
certain Level 3 financial instruments incorporate estimates of the 
effects of Ambac's own credit risk and/or counterparty credit risk, 
which  can be complex and judgmental. Level 2 instruments are 
valued  using  quoted  prices  for  similar  instruments  in  active 
markets,  quoted  prices  for  identical  or  similar  instruments  in 
inactive  markets  and  model-derived  valuations  where  all  the 
significant inputs are observable in active markets.  Certain Level 
2 fixed income securities that have lower trading volumes, fewer 
comparable securities in the market or less coverage by alternative 
pricing sources with reasonable levels of price transparency may 
require  additional  validation  procedures  and  involve  significant 
judgment.

As a result of the increased judgment for the above-described Level 
3 and Level 2 instruments, the actual trade value of the financial 
instrument in the market, or exit value of the financial instrument 
owned by Ambac, may be significantly different from its recorded 
fair value. 

Moreover,  fixed  income  securities  classified  as  “available-for-
sale” which have experienced declines in fair value below Ambac's 
amortized  cost  must  be  evaluated  for  other-than-temporary 
if 
impairment  ("OTTI").  An  OTTI  charge 
management assesses it either (i) has the intent to sell the security 
or  (ii)  more  likely  than  not  will  be  required  to  sell  the  security 
before the anticipated recovery of its amortized cost basis less any 
current  period  credit  loss.  This  impairment  assessment  also 
involves determining whether an actual credit loss exists for the 
security.  Evaluating whether declines in fair value are other-than-
temporary is also inherently judgmental.  For further information 
on  the  OTTI  evaluation  process  refer  to  Note  2.  Basis  of 

is  recognized 

| Ambac Financial Group, Inc.   36   2017 FORM 10-K |

Presentation  and  Significant  Accounting  Policies 
the 
Consolidated Financial Statements included in Part II, Item 8 in 
this Form 10-K.  

to 

Valuation of Deferred Tax Assets:

Our provision for taxes is based on our income, statutory tax rates 
and tax planning opportunities available to us in the jurisdictions 
in which we operate. Tax laws are complex and subject to different 
interpretations by the taxpayer and respective governmental taxing 
authorities. Significant judgment is required in determining our 
tax expense and in evaluating our tax positions. We review our tax 
positions  quarterly  and  adjust  the  balances  as  new  information 
becomes available.   In December 2017, H.R.1 (commonly known 
as the Tax Cut and Jobs Act or"TCJA") was enacted and introduced 
significant changes to the U.S. tax code, including to corporate tax 
rates,  business-related  exclusions,  and  deductions  and  credits 
effective  January  1,  2018.  In  accordance  with  U.S.  GAAP,  the 
effects of changes in tax rates and laws on current and  deferred 
tax  balances  must  be  recognized  in  the  period  in  which  the 
legislation is enacted.  As such, we incorporated the effects of the 
TCJA in our valuation of deferred tax assets for the year ended 
December 31, 2017.  Deferred tax assets arise because of temporary 
differences between the financial reporting and tax bases of assets 
and liabilities, as well as from net operating loss ("NOL") and tax 
credit  carry  forwards.  More  specifically,  deferred  tax  assets 
represent a future tax benefit (or receivable) that results from losses 
recorded under GAAP in a current period which are only deductible 
for tax purposes in future periods and NOL carry forwards.  

The NOL carryforward component of the deferred tax asset, which  
relates to NOLs generated prior to the effective date of the TCJA, 
will  expire  if  not  utilized  within  certain  periods.  Valuation 
allowances  are  established  to  reduce  deferred  tax  assets    to  an 
amount that “more likely than not” will be realized. All available 
evidence, both positive and negative, needs to be identified and 
considered in making the determination with significant weight 
given to evidence that can be objectively verified.  The level of 
deferred  tax  asset  recognition  is  influenced  by  management’s 
assessment of future expected taxable income, which depends on 
the  existence  of  sufficient  taxable  income  of  the  appropriate 
character (ordinary vs. capital) within the carry forward periods 
available under the tax law.  As a result of the risks and uncertainties 
associated with future operating results, management believes it 
is more likely than not that the Company will not generate sufficient 
taxable income to recover the deferred tax asset and therefore has 
a  full  valuation  allowance.  See  Note  14.  Income  Taxes  for 
additional information on the Company's deferred income taxes, 
including the effects of the TCJA.

FINANCIAL GUARANTEES IN FORCE

Financial guarantee products were sold in three principal markets: 
U.S.  public  finance,  U.S.  structured  finance  and  international 
finance. The following table provides a breakdown of guaranteed 
net par outstanding by market sector at December 31, 2017 and 
2016.  Net par exposures within the U.S. public finance market 
include capital appreciation bonds which are reported at the par 
amount at the time of issuance of the insurance policy  as opposed 
to  the  current  accreted  value  of  the  bonds.    Guaranteed  net  par 
outstanding includes the exposures of policies that insure variable 
interest entities (“VIEs”) consolidated by Ambac. Guaranteed net 
par  outstanding  excludes  the  exposures  of  policies  that  insure 
bonds which have been refunded or pre-refunded: 

($ in millions) December 31,

2017

2016

Public Finance

Structured Finance

International Finance

Total net par outstanding

$

$

32,088

$

13,816

16,812

62,716

$

45,062

16,951

17,333

79,346

Included in the above net par exposures at December 31, 2017 and 
2016 are $326 million and $737 million, respectively, of exposures 
that were executed in the form of credit derivatives. See Part II, 
Item 7,  “Management’s  Discussion  and  Analysis  of  Financial 
Condition  and  Results  of  Operations”  and  Item 8,  “Financial 
Statements  and  Supplementary  Data”  for  further  discussion  of 
credit derivative exposures. 

Certain  guaranteed  bonds  were  issued  as  floating  rate  debt, 
including  Auction  Rate  Securities  and  Variable  Rate  Demand 
Obligations,  which  introduces  interest  rate  risk  to  Ambac 
Assurance.  Refer  to Auction  Rate  Securities  and  Variable  Rate 
Demand Obligation Exposures below for further discussion. 

U.S. Public Finance Insured Portfolio 

Ambac’s  portfolio  of  U.S.  public  finance  exposures  is  $32,088 
million, representing 51% of Ambac’s net par outstanding as of 
December 31,  2017  and  a  29%  reduction  from  the  amount 
outstanding at December 31, 2016. This reduction in exposure was 
mainly  due  to  normal  exposure  runoff  in  addition  to  early 
terminations  (calls,  refundings  and  pre-refundings).  While 
Ambac’s U.S. public finance portfolio consists predominantly of 
municipal bonds such as general obligation and revenue, lease and 
tax-backed obligations of state and local government entities, the 
portfolio also comprises a wide array of non-municipal types of 
bonds,  including  financings  for  not-for-profit  entities  and 
transactions  with  public  and  private  elements,  which  generally 
finance infrastructure, housing and other public interests.  See Note 
6. Financial Guarantees in Force to the Consolidated Financial 
Statements,  included  in  Part  II,  Item 8  in  this  Form  10-K  for 
exposures by bond type. 

Municipal bonds are generally supported directly or indirectly by 
the  issuer’s  taxing  authority  or  by  public  sector  fees  and 
assessments which may or may not be specifically pledged. Risk 
factors  in  these  transactions  derive  from  the  municipal  issuer, 
including its fiscal management, politics, and economic position, 
as well as its ability and willingness to continue to pay its debt 
service.  Municipal  bankruptcies  and  similar  proceedings,  while 
still relatively uncommon, have occurred, exposing Ambac to the 
risk  of  liquidity  claims  and  ultimate  losses  if  issuers  cannot 
successfully adjust their liabilities without impairing creditors. 

Not-for-profit transactions are generally supported by the not-for-
profit entities’ net revenues and may also include specific pledges, 
liens and/or mortgages. The entity typically serves a well-defined 
market  and  promulgates  a  public  purpose  mission.  These 
transactions  may  afford Ambac  contractual  protections  such  as 
financial  covenants  and  control  rights  in  the  event  of  issuer 
breaches  and  defaults.  Risk  factors  in  these  transactions  derive 
from the creditworthiness of the issuer, including but not limited 
to, its financial condition, leverage, management, business mix, 
competitive  position, 
trends, 
government programs, etc. Examples of these types of transactions 

industry  and  socioeconomic 

| Ambac Financial Group, Inc.   37   2017 FORM 10-K |

include  not-for-profit  hospitals,  universities,  associations  and 
charities.

Public/private transactions are generally structured to achieve their 
targeted public interest objective without direct support from the 
public  sector.  Some  examples  of  this  type  of  financing  include 
affordable housing, private education, and privatized military and 
student housing. Protections within these financings provided to 
Ambac  usually  include  the  strength  of  the  financed  asset’s 
essentiality  and  public  purpose  and  may  include  financial 
covenants,  collateral  and  control  rights.  Risk  factors  include 
financial underperformance, event risk and a shift in the asset’s 
mission or essentiality. One example of this type of financing is 
U.S. military housing. 

Ambac  insures  approximately  $5.8  billion  net  par  of  privatized 
military  housing  debt.  The  debt  was  issued  to  finance  the 
construction  and/or  renovation  of  housing  units  for  military 
personnel and their families on domestic U.S. military bases. Debt 
service is not directly paid or guaranteed by the U.S. Government. 
Rather,  the  bonds  are  serviced  from  the  cash  flow  generated  in 
most cases by rental payments deposited by the military directly 
into lockbox accounts as part of each service personnel’s Basic 
Allowance for Housing (BAH). In a small number of cases rental 
payments are also coming from civilians, including retired service 
personnel,  living  on  a  particular  base.  Collateral  for  these 
transactions includes the BAH payments as well as an interest in 
the ground lease. Risk factors affecting these transactions include 
ongoing  base  essentiality,  military  deployments,  the  U.S. 
government’s  commitment  to  fund  the  BAH,  marketability/
attractiveness of the on-base housing units versus off-base housing, 
construction completion, environmental remediation, utility and 
other operating costs, and housing management.

Puerto Rico

its 

Ambac has exposure to the Commonwealth of Puerto Rico (the  
"Commonwealth")  and 
instrumentalities  across  several 
different  issuing  entities.    Each  has  its  own  credit  risk  profile 
attributable to discrete revenue sources, direct general obligation 
pledges  and  general  obligation  guarantees.    Most  Puerto  Rico 
bonds insured  by Ambac Assurance are not subject to acceleration. 
The  Ambac-insured  Puerto  Rico  Convention  Center  District 
Authority (Hotel Occupancy Tax) bonds may be accelerated only 
with the consent of, or at the direction of, Ambac Assurance. The 
Ambac-insured  Puerto  Rico  Sales  Tax  Financing  Corporation's 
Senior Sales Tax Revenue bonds may be accelerated only with the 
consent  of  Ambac  Assurance,  subject  to  the  Ambac  financial 
guaranty  insurance  policy  being  in  full  force  and  effect.  Other 
Ambac-insured  Puerto  bonds  are  not  subject  to  acceleration.  
Ambac Assurance's insurance policies do not insure against loss 
of  any  acceleration  payment,  other  than  at  the  sole  option  of 
Ambac. 

Suspension of Debt Service Payments

In  late  2015,  due  to  the  activation  of  the  Commonwealth 
Constitution's Priority Debt Provision, certain revenues pledged 
for  the  repayment  of  debt  issued  by  Puerto  Rico  Infrastructure 
Financing  Authority  (“PRIFA”),  Puerto  Rico  Highways  and 
Transportation Authority (“PRHTA”) and Puerto Rico Convention 
Center  District  Authority  (“PRCCDA”)  were  diverted  by  the 
Commonwealth  to  be  applied  to  the  Commonwealth's  debt 
obligations and not applied to debt service on PRIFA, PRHTA and 

PRCCDA  debt  obligations.    Consequently,    a  default  on  debt 
service  due on certain  PRIFA bonds insured by Ambac Assurance 
occurred on  January 1, 2016. 

In April 2016, the Commonwealth became subject to an emergency 
moratorium,  known  as  "Law  21,"  on  debt  payments  of  the 
Commonwealth and its instrumentalities. Beginning in April 2016, 
and culminating on June 30, 2016, former Governor Padilla issued 
additional  executive  orders  under  Law  21  declaring  states  of 
emergency at PRHTA, PRIFA, PRCCDA, and other Puerto Rico 
instrumentalities  through  January  31,  2017,  and  suspending 
payment obligations on bonds issued by those entities, including 
bonds insured by Ambac Assurance. 

On January 29, 2017, current Governor Rosselló enacted Act 5 of 
2017 known as the Puerto Rico Financial Emergency and Fiscal 
Responsibility Act of 2017 (“Act 5”) which, among other things, 
established  an  emergency  period  and  declared  executive  orders 
under Act 21, which suspended payments on General Obligation 
debt  and  other  debt,  to  continue  in  full  force  and  effect  until 
amended, rescinded or superseded. On December 28, 2017, the 
emergency period was extended to June 30, 2018 by Executive 
Order 2017-76. 

PROMESA Law

On June 30, 2016, the Puerto Rico Oversight, Management, and 
Economic Stability Act ("PROMESA") was signed into law by the 
President  of  the  United  States.  PROMESA  establishes  a  seven-
member  federal  financial  oversight  board  (“Oversight  Board”) 
with authority to require that balanced budgets and fiscal plans be 
adopted and implemented by Puerto Rico. PROMESA provides a 
legal framework under which the debt of the Commonwealth and 
its related authorities and public corporations may be voluntarily 
restructured, and grants the Oversight Board the sole authority to 
file restructuring petitions in a federal court to restructure the debt 
of  the  Commonwealth  and  its  related  authorities  and  public 
corporations if voluntary negotiations fail, provided that any such 
restructuring  must  be  in  accordance  with  an  Oversight  Board 
approved fiscal plan that respects the liens and priorities provided 
under Puerto Rico law.

PROMESA provides that laws such as Act 21 are not binding on 
any non-consenting creditor to the extent they prohibit the payment 
of principal or interest.  The practical effect of this provision is 
unknown and therefore Ambac is at risk to the ongoing execution, 
interpretation  and  ultimate  enforcement  of  this  provision.  
PROMESA  also  provides  that  unlawful  executive  orders  are 
preempted  under  PROMESA,  but  there  is  no  procedure  for 
determining  whether  a  particular  executive  order  is  unlawful, 
creating uncertainty in general and with specific regards to how 
the preemption provision will be implemented towards Ambac’s 
exposures.

specifically 

PROMESA is untested and many provisions are unique.  There is 
inherent  uncertainty  and  risk  both  generally  and  for  Ambac’s 
exposures 
interpretation  and 
regarding 
implementation of PROMESA.  Among other things, PROMESA 
contains  provisions  that  may  permit  consensual  and  non-
consensual 
the 
Commonwealth and its instrumentalities. 

restructurings  of  debt  obligations  of 

the 

The following table shows Ambac's insured exposure to each issuer 
segregated by whether such debt obligation is subject to the Priority 

| Ambac Financial Group, Inc.   38   2017 FORM 10-K |

Debt  Provision  or  "clawback."   Ambac  has  initiated  litigation 
challenging  the  application  of  the  "clawback"  announced  by 
Governor Padilla, Puerto Rico's former  governor, on December 
1, 2015.  A description of Ambac's legal challenge is provided in 

Note  16.  Commitments  and  Contingencies  in  the  Consolidated 
Financial Statements, included in Part II, Item 8 in this Form 10-
K.

Range of
Maturity

Ambac
Ratings (1)

Net Par
Outstanding (2)

Net Par and 
Interest 
Outstanding (3)(8)

Ever-to-Date 
Net Claims 
Paid(4)

($ in millions)
Exposures Subject to Priority Debt Provision (5)

PR Highways and Transportation Authority (1968 

Resolution - Highway Revenue) (6)

PR Highways and Transportation Authority (1998 

Resolution - Senior Lien Transportation Revenue) (6)

PR Infrastructure Financing Authority (Special Tax 

Revenue) (7)

PR Convention Center District Authority (Hotel Occupancy

Tax)

Total

2018-2027

2018-2042

2018-2044

2018-2031

Exposures Not Subject to Priority Debt Provision

Commonwealth of Puerto Rico - General Obligation Bonds

2019-2023

PR Public Buildings Authority - Guaranteed by the

Commonwealth of Puerto Rico

PR Sales Tax Financing Corporation - Senior Sales Tax

Revenue (COFINA)

Total

Total Net Exposure to The Commonwealth of Puerto

Rico and Related Entities

2018-2035

2047-2054

BIG

BIG

BIG

BIG

BIG

BIG

BIG

$

14

$

20

$

419

439

125

997

56

110

805

971

746

970

184

1,920

64

187

7,321

7,572

13

35

104

12

164

4

37

—

41

$

1,968

$

9,492

$

205

(1) 

Internal credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac Assurance. In 
cases where Ambac Assurance has insured multiple tranches of an issue with varying internal ratings, or more than one obligation of an issuer with varying 
internal ratings, a weighted average rating is used. Ambac Assurance credit ratings are subject to revision at any time and do not constitute investment 
advice.   BIG denotes credits deemed below investment grade. 

(2)    Net Par includes capital appreciation bonds, which are reported at the par amount at the time of issuance of the insurance policy as opposed to the current 
accreted value of the bonds.  Accretion of the capital appreciation bonds would increase the related net par by $683 million at December 31, 2017.

(3)  Net  Par  and  Interest  Outstanding  ("P&I")  represents  the  total  insured  future  debt  service  remaining  over  the  lifetime  of  the  bonds.    P&I  for  capital 

appreciation bonds does not represent the accreted amount as noted in footnote (2) but rather the amount due at respective maturity dates. 

(4) 

In addition to ever-to-date net claims paid, Ambac made net claim payments of $26 million during January 2018.

(5)  Commonly known as "clawback" provision pursuant to Section 8 of Article VI of the Constitution of the Commonwealth of Puerto Rico. Under this 
provision, in case the available revenues (the Spanish version uses the term “resources”)  including surplus for any fiscal year are insufficient to meet the 
appropriations made for that year, interest on the public debt and amortization thereof shall first be paid, and other disbursements shall thereafter be made 
in accordance with the order of priorities established by law.  These exposures are also subject to Act No. 5-2017, as amended, also known as the Financial 
Emergency and Fiscal Responsibility Act of 2017, which declares an emergency period that has been subsequently extended until June 30, 2018.   Pursuant 
to Act  5-2017,  all  executive  orders  issued  under Act  No.  21-2016  (as  amended,  known  as  the  Puerto  Rico  Emergency  Moratorium  and  Financial 
Rehabilitation Act), shall continue in full force and effect until amended, rescinded or superseded.

(6)  Certain Pledged Revenues for Highways and Transportation Revenue Bonds such as Toll Revenues and Investment Earnings are not subject to the Priority 

Debt Provision. 

(7)  Payable from and secured by proceeds from a federal excise tax imposed on all items produced in Puerto Rico and sold on the mainland of the United 

States.  Currently, rum is the only product from Puerto Rico subject to this federal excise tax.

(8)  Net Par and Interest Outstanding excludes the effects of a 10% current interest rate on $60 million net par of PR Public Building Authority ("PBA") bonds 
with a maturity date of July 1, 2035, resulting from the absence of a remarketing. Should a remarketing not occur before the maturity of the bonds, the 
Net Par and Interest Outstanding for PBA exposure would increase by $47.4 million.

PROMESA  also  confers  significant  powers  and  responsibilities  on  the 
Oversight Board.  Among other things, the Oversight Board is required to 
certify any insolvency petitions that may be filed by Puerto Rico or its 
instrumentalities  under  Title  III  of  PROMESA,  any  proposed  plans  of 
adjustment  in  such  proceedings,  and  any  voluntary  restructuring 
agreement among creditors under Title VI of PROMESA (which 
has the potential to bind non-consenting creditors).  The Oversight 
Board  is  also  required  to  approve  fiscal  plans  and  budgets 
submitted by the Commonwealth and monitor compliance with 
those  plans  and  budgets,  and  to  approve  any  debt  issuances  or 
modifications  by  the  Commonwealth  or  its  instrumentalities.  

Ambac is unable to predict to what extent debt restructurings will 
be  proposed  or  implemented  under  PROMESA,  and  how  its 
insured obligations will fare in any such restructurings.

Title III Filings

In  response  to  letter  requests  from  Governor  Rosselló,  the 
Oversight Board commenced a PROMESA Title III proceeding, 
which  is  a  proceeding  for  adjustments  of  debt,  for  the 
Commonwealth of Puerto Rico on May 3, 2017, and for the Puerto 
Rico  Sales Tax  Financing  Corporation  ("COFINA")  on  May  5, 
2017, in the United States District Court for the District of Puerto 

| Ambac Financial Group, Inc.   39   2017 FORM 10-K |

Rico. Subsequently, the Oversight Board commenced a Title III 
proceeding  for  the  Employees  Retirement  System  ("ERS")  and 
PRHTA on May 21, 2017, and for the Puerto Rico Electric Power 
Authority ("PREPA") on July 2, 2017. Ambac Assurance has not 
issued any financial guaranty policies with respect to obligations 
of ERS or PREPA. 

Fiscal Plans 

for 

("FEGP") 

to  be  paid  by 

On  March  13,  2017,  the  Oversight  Board  certified  the  10-year 
Fiscal  and  Economic  Growth  Plan 
the 
Commonwealth.   The  certified  FEGP,  among  other  things,  was 
intended to provide Commonwealth creditors a base from which 
to progress consensual negotiations under Title VI of PROMESA.  
However, the certified FEGP implied a 77% discount to all debt 
service  due 
its 
instrumentalities covered by the FEGP over the ten-years of the 
plan (FY2017-2026).  The FEGP did not provide details regarding 
its underlying assumptions and data, expense definitions, cause of 
expense growth or accounting adjustments and did not include any 
restructuring  proposals.  These  deficiencies  of  the  FEGP,  when 
combined with the absence of sufficient projected cash flows for 
debt  service,  increased  the  uncertainty  of  whether  successful 
consensual negotiations can be reached or what creditor outcomes 
might be under the Title III proceedings. 

the  Commonwealth  and 

As  a  result  of  the  damage  inflicted  by  Hurricane  Maria  in 
September 2017, the anticipated influx of certain federal funds, 
and  other  structural  changes  following  the  hurricane,  the 
Commonwealth drafted revised fiscal and economic growth plans 
(the  “Revised  FEGPs”)  for  the  Commonwealth  and  various 
instrumentalities.  On January 24, 2018, the Puerto Rico Fiscal 
Agency and Financial Advisory Authority (“FAFAA”) released the 
proposed  Revised  FEGPs  for  the  Commonwealth,  PREPA  and 
Puerto  Rico  Aqueduct  and  Sewer  Authority  (“PRASA”).  The 
proposed  Revised  FEGPs  were  also  submitted  to  the  Oversight 
Board  for  review  and  certification.  On  February  5,  2018,  the 
Oversight Board issued a notice of violation with respect to each 
of these Revised FEGPs.  In the notice of violation for the Revised 
FEGP for the Commonwealth, the Oversight Board required a more 
detailed debt sustainability analysis over a 30-year period, among 
other changes. The required changes and further clarifications to 
the Commonwealth, PREPA, and PRASA FEGPs were submitted 
to the Oversight Board on February 12, 2018. Subsequent review 
and certification by the Oversight Board is intended to be complete 
by March 30, 2018. 

The  Commonwealth’s  proposed  Revised  FEGP  submitted  on 
February  12,  2018,  uses  a  six-year  horizon,  projects  a  six-year 
cumulative decline in population of 20.0%, cumulative nominal 
GNP growth of 16.7%, cumulative revenue growth of 3.1%, and 
projects that by the Commonwealth's fiscal year 2023 there will 
be an accumulated surplus of $3.4 billion. However, this proposed 
Revised FEGP does not delineate expenses between essential and 
non-essential services, does not define essential services, and does 
not  provide  for  any  cash  flows  for  debt  service. This  proposed 
Revised FEGP also does not address permanent debt write-downs 
and  the  extent  of  longer-term  debt  service,  leaving  uncertainty 
about the Commonwealth’s future obligations.

If certified without meaningful changes from the current proposed 
plans, the Revised FEGPs of  the Commonwealth, PREPA, and 
PRASA  could  perpetuate  the  uncertainty  around  the  potential 

timing  and  severity  of  any  permanent  losses  on Ambac-insured 
bonds of the Commonwealth and its instrumentalities and may lead 
to  further  protracted  resolution  timelines  between  creditors  and 
debtors. Furthermore, if the Revised FEGPs, without meaningful 
changes,  became  the  sole  or  primary  measure  for  determining 
creditor  outcomes,  Ambac's  financial  condition, 
including 
liquidity, loss reserves and capital resources may suffer a materially 
negative impact.

The proposed Revised FEGPs for the Government Development 
Bank, the University of Puerto Rico, PRHTA and the COSSEC 
(the  savings  and  loan  cooperatives  regulators)  are  due  to  be  
submitted March 9, 2018, which the Oversight Board intends to 
review and certify by April 20, 2018.  It is currently unclear what, 
if anything, the revised fiscal plan for PRHTA will do to address 
the  restructuring  of  its  debt  obligations.  However,  any  such 
restructuring  proposal  may  include  material  cuts  to  payment  of 
principal and interest on outstanding bonds of PRHTA, including 
bonds insured by Ambac Assurance.

Hurricanes Irma and Maria

On September 6, 2017, Hurricane Irma, a Category 5 storm, passed 
north of Puerto Rico leaving more than 1 million people without 
electricity on the island.  On September 20, 2017, Hurricane Maria, 
a  Category  4  storm  at  the  time,  made  landfall  in  Puerto  Rico, 
causing  severe  damage  to  the  island  and  its  infrastructure, 
including  the  destruction  of  a  significant  portion  of  the  the 
electrical transmission and distribution system on the the island.  
The extensive damage and the disruption to the economy caused 
by the hurricanes further stressed what was already a challenging 
position for the Commonwealth highlighted by: (i) existing  poor 
economic and demographic trends, including fluctuating economic 
activity  levels  and  continued  outmigration,  (ii)  weak  debt  and 
contingent liability position, including unsustainable leverage and 
high  fixed  costs  for  pensions;  (iii)  historically  weak  budgetary 
performance and flexibility (Fiscal Year 2016 and prior structural 
imbalances); and (iv) uncertain financial and economic prospects. 
For  at  least  the  near-term,  the  Commonwealth  faces  uncertain 
financial and economic prospects due to the scale of the damage 
from the hurricanes as well as the uncertainty over the total amount, 
timing, and impact of Federal aid for disaster recovery.

Federal Aid 

On  November  13,  2017,  Governor  Rosello  submitted  a  formal 
request for Federal disaster relief assistance of $94.4 billion to help  
the Commonwealth recover and rebuild from hurricanes Irma and 
Maria. It is unclear at this time how much of Governor Rosello's 
request or in what form will ultimately be made available to assist 
Puerto Rico. 

To date, $4.9 billion is being made available to Puerto Rico and 
the  U.S.  Virgin  Islands  as  a  Community  Development  Loan 
("CDL") as part of a $36.5 billion disaster aid bill signed into law 
on  October  26,  2017.  In  addition,  the  Federal  Emergency 
Management Agency  ("FEMA")  reported  that  in  the  last  three 
months of 2017, its obligations under the Disaster Recovery Funds 
("DRF") program for Puerto Rico for hurricanes Irma and Maria 
totaled $6.7 billion with another $7.0 billion estimated for the nine 
months ending September 30, 2018.

On February 9, 2018, the Bipartisan Budget Act of 2018 was signed 
into law. There were several elements of this legislation that were 

| Ambac Financial Group, Inc.   40   2017 FORM 10-K |

targeted to assist in the recovery of Puerto Rico, including $4.8 
billion in Medicaid funding for two years; $11 billion for the U.S. 
Housing  and  Urban  Development's  Community  Development 
Block Grant Disaster Relief program for housing, infrastructure 
and economic development; additional funding for FEMA's DRF 
program;  and  other  disaster  aid  measures.  In  addition,  the 
legislation provides for an extension to 2022 of the rum excise tax 
cover-over that provides increased rum tax rebates for Puerto Rico, 
extends by one year deductions allowable with respect to income 
attributable to domestic production activities in Puerto Rico under 
U.S. Code Section 199, and also adds each low-income community 
in Puerto Rico to be designated as a qualified opportunity zone 
under Sec. 1400Z-1, which allows those areas to qualify for certain 
tax incentives. The total value of all of the Puerto Rico-specific 
elements of the legislation is unclear at this time and it is possible 
that additional Federal aid packages may be approved during the 
course of 2018.

of PROMESA, and one has been stayed by order of the United 
States  District  Court  for  the  District  of  Puerto  Rico  pending 
resolution of an interpleader action related to COFINA funds (to 
which interpleader action Ambac is also a party).  The three active 
litigations are proceeding as adversary proceedings under the Title 
III process before the United States District Court for the District 
of Puerto Rico.  Accordingly, Ambac is unable to predict when and 
how the issues raised in those cases will be resolved.  If Ambac 
Assurance is unsuccessful with any of these challenges, Ambac’s 
financial condition, including liquidity, loss reserves and capital 
resources may suffer a material negative impact.  

Refer to Note 16. Commitments and Contingencies included in Part 
II, Item 8 in this Form 10-K for further information about Ambac's 
litigation relating to Puerto Rico. 

Other Post-Title III Litigation Update

Tax Reform

See Item 1A.  Risk Factors

Commonwealth Liquidity

for 

and 

liquidity 

the  Commonwealth 

The  publishing  on  January  19,  2018,  by  FAFAA  of  an  updated 
report on $6.8 billion of cash balances and the classification of 
approximately 800 bank accounts originally addressed in FAFAA’s 
initial December 18, 2017 report did not appear to provide for any 
enhanced 
its 
instrumentalities, as the report claimed that much of this balance 
had  restricted  uses  or  was  tied  up  in  ongoing  litigation. 
Consequently, this purported lack of access to a portion of these 
funds  could  exacerbate  existing  liquidity  constraints  of  the 
Commonwealth and its instrumentalities for certain essential and 
non-essential  services  and  further  strain  timelines  and  potential 
severities for creditors, including Ambac. In connection with the 
report,  the  Oversight  Board  confirmed  that  it  appointed  an 
independent forensic analysis team to compile a comprehensive 
inventory of all government bank accounts, cash equivalents, and 
investments along with their respective account balances.

Mediation

On  June  14,  2017,  Judge  Laura Taylor  Swain  entered  an  order 
appointing a team of mediators to facilitate confidential mediation 
discussions in order to facilitate consensual resolution of certain 
issues arising in the context of these Title III cases.  The mediation 
team is led by Chief Judge Barbara Houser of the United States 
Bankruptcy Court for the Northern District of Texas, and consists 
of  Circuit  Judge  Thomas Ambro  of  the  United  States  Court  of 
Appeals for the Third Circuit, Senior District Judge Nancy Atlas 
of  the  United  States  District  Court  for  the  Southern  District  of 
Texas, Bankruptcy Judge Christopher Klein of the United States 
Bankruptcy Court for the Eastern District of California, and Senior 
District Judge Victor Marrero of the United States District Court 
for the Southern District of New York.  Confidential mediation 
proceedings  are  ongoing.    No  assurances  can  be  given  that 
consensual  resolutions  will  be  achieved  with  respect  to  the 
Commonwealth’s or COFINA’s obligations or those of any other 
Puerto Rico instrumentality.   

On  January  30,  2018,  the  United  States  District  Court  for  the 
District  of  Puerto  Rico  issued  two  decisions  in  adversary 
proceedings  related 
the 
Commonwealth of Puerto Rico and certain of its instrumentalities.

the  Title  III  restructuring  of 

to 

In Assured Guaranty Corp., et al. v. Commonwealth of Puerto Rico, 
et  al.  (No.  17-155),  the  court  dismissed  the  plaintiff  monoline 
insurers’ complaint against the Commonwealth and the PRHTA 
(among other defendants). The court ruled that the special revenues 
provisions of the Bankruptcy Code do not require a debtor, post-
petition, to apply the special revenues to the bonds they secure. 
The court also held that the plaintiffs were unable to show that 
bondholders  have  an  ownership  interest,  to  the  exclusion  of 
PRHTA, in the funds held in certain reserve accounts at PRHTA. 
The  court  rejected  the  Commonwealth  and  Oversight  Board’s 
argument that Section 305 of PROMESA, a provision that reserves 
the right of the Title III debtor to control its own governmental 
powers and property, deprives the court of jurisdiction over certain 
claims;  instead,  the  court  held  that  section  305  only  limits  the 
court’s  ability  to  order  remedies  that  would  interfere  with  the 
debtor’s  governmental  powers  or  ability  to  control  its  property. 
The court did not address whether the PRHTA bonds are secured 
by a lien or security interest. Ambac Assurance brought similar 
claims (among others) in Ambac Assurance Corporation v. Puerto 
Rico, et al. (No. 1:17-ap-00159). The court has not yet ruled on 
Ambac  Assurance’s  claims,  but  in  light  of  its  decision  in  the 
Assured case, there is a substantial risk that the court will dismiss 
such claims for the same reasons it dismissed the complaint of the 
monoline insurers in Assured.

In ACP Master, Ltd., et al. v. Commonwealth of Puerto Rico, et al. 
(No. 17-189), the court dismissed the plaintiff general obligation 
(“GO”) bondholders’ complaint against the Commonwealth and 
the  Oversight  Board.  The  court  held  that  the  GO  bondholders’ 
effort to compel application of certain revenues to the payment of 
GO bonds was barred by section 305 of PROMESA, as this ruling 
would interfere with the governmental powers of the debtor (the 
Commonwealth). The court further held that the remaining counts 
of the plaintiffs’ complaint, which requested declarations as to the 
legal status of the GO bonds could not be adjudicated because they 
sought advisory opinions and therefore were not justiciable.

Ambac Post-Title III Litigation Update

Ambac Assurance is party to ten litigations related to its Puerto 
Rico exposures. Six of these litigations are stayed under Title III 

The court’s decisions that section 305 of PROMESA restricts the 
court’s  ability  to  order  remedies  that  would  interfere  with  the 
debtor’s governmental powers or ability to control its property, if 

| Ambac Financial Group, Inc.   41   2017 FORM 10-K |

not overturned on appeal, likely will limit the ability of Ambac 
Assurance to successfully compel the payment of debt service on 
its insured obligations during the pendency of the Title III cases 
and may adversely impact the proposed terms applicable to such 
obligations  under  any  plan  of  adjustment  proposed  in  Title  III 
proceedings.  Any  such  proposed  plan  of  adjustment  would, 
however, need to satisfy the requirements of PROMESA, including 
consistency  with  certified  fiscal  plans,  which  are  required  to 
respect lawful priorities or lawful liens, in order to be approved by 
the court.

Accordingly, Ambac Assurance is unable to predict when and how 
the issues raised in its cases will be resolved ultimately.  If Ambac 
Assurance is unsuccessful with any of its challenges, its financial 
condition, including liquidity, loss reserves and capital resources, 
may suffer a material negative impact.

Summary

As  a  result  of  the  developments  described  in  this  10-K,  the 
Commonwealth of Puerto Rico and certain of its instrumentalities 
will  continue  to  default  on  debt  service  payments,  including 
payments owed on bonds insured by Ambac Assurance. Ambac 
Assurance may be required to make significant amounts of policy 
payments over the next several years, the recoverability of which 
is  subject  to  great  uncertainty,  which  may  lead  to  material 
permanent losses. Our exposure to Puerto Rico is impacted by the 
amount  of  monies  available  for  debt  service,  which  is  in  turn 
affected by variability in economic growth, tax revenues, essential 
services  expense  as  well  as  federal  funding  of  Commonwealth 
needs. In addition, our exposure to Puerto Rico is impacted by the 
significant  damage  to  the  Commonwealth  that  was  inflicted  by 
Hurricane Maria, which made landfall on September 20, 2017,  as 
well as Hurricane Irma, which passed just north of the island on 
September 6, 2017. The longer term recovery of the economy of 
the Commonwealth and its essential infrastructure will likely be 
highly  dependent  on  the  amount,  timing  and  effectiveness  of 
Federal aid.  There is historical precedent for meaningful Federal 
support following other natural disasters in the United States and 
its territories and, to date, some Federal aid measures have been 
approved  and  have  already  started  to  assist  in  the  recovery. 
However,  there  can  be  no  assurances  as  to  the  sufficiency  or 
ultimate  level  of  the  aid  and  as  to  the  effectiveness  of  the 
deployment  of  the  aid  in  benefiting  the  long  term  recovery  of 
economic activity in Puerto Rico.  While our reserving scenarios 
reflect a wide range of possible outcomes reflecting the significant 
uncertainty regarding future developments and outcomes, given 
our exposure to Puerto Rico and the economic, fiscal, legal and 

political  uncertainties  associated  therewith  as  well  as  the 
uncertainties  emanating  from  the  damage  caused  by  hurricanes 
Maria  and  Irma,  our  loss  reserves  may  ultimately  prove  to  be 
insufficient to cover our losses, potentially by a material amount, 
and may be subject to material volatility.

  possible  final 

Given  the  numerous  uncertainties  existing  with  respect  to  the 
restructuring process and relevant litigations, no assurance can be 
given that ultimate debt service discounts will not be severe and 
cause Ambac  to  experience  losses  materially  exceeding  current 
reserves. It is possible that certain restructuring process solutions, 
together  with  associated  legislation,  budgetary,  and/or  public 
policy proposals could be adopted and could further impair our 
exposures.  In  addition, 
legal 
there  are 
determinations,  including  failing  to  recognize  or  properly 
differentiate  legal  structures  and  protections  applicable  to  such 
exposures, that could result in losses exceeding our current reserves 
by  a  material  amount  and  our  loss  reserves  would  need  to  be 
increased.  In  particular,  in  a  Title  III  process,  should  court-
approved plans of adjustment for the Commonwealth, COFINA, 
PRHTA, or any other issuers of Ambac-insured debt that file for 
Title  III  protection  imply  further  discounts  to  debt  service  than 
under  the  Commonwealth’s  Revised  FEGP,  the  Fiscal  Plan 
Compliance  Act  be  upheld,  or  Ambac  receive  unfavorable 
judgments in the litigations to which it is a party, Ambac’s financial 
condition could be materially adversely affected.  It is also possible 
that  economic  or  demographic  outcomes  may  be  worse  than 
forecast  under  the  Commonwealth’s  revised  FEGP  or  under 
proposals  or  plans  promulgated  by  the  Commonwealth  or  its 
instrumentalities  in  or  in  connection  with  a Title  III  process  or 
otherwise. Even a negotiated restructuring to which Ambac agrees 
as part of a Title VI or other process may involve material losses 
in excess of current reserves.

Ambac  has  considered  these  developments  and  other  factors  in 
evaluating its Puerto Rico loss reserves.  During the year ended 
December 31, 2017, Ambac had incurred losses associated with 
its Domestic Public Finance insured portfolio of $476.3 million, 
which was significantly impacted by the continued uncertainty and 
volatility  of  the  situation  in  Puerto  Rico.    While  management 
believes  its  reserves  are  adequate  to  cover  losses  in  its  Public 
Finance insured portfolio, there can be no assurance that Ambac 
may not incur additional losses in the future, particularly given the 
developing economic, political, and legal circumstances in Puerto 
Rico.  Such additional losses may have a material adverse effect 
on Ambac’s results of operations and financial condition. 

| Ambac Financial Group, Inc.   42   2017 FORM 10-K |

The table below shows Ambac’s ten largest U.S. public finance exposures, by repayment source, as a percentage of total financial guarantee 
net par outstanding at December 31, 2017:

($ in millions)

New Jersey Transportation Trust Fund Authority - Transportation System

Puerto Rico Sales Tax Financing Corporation - Senior Sales Tax Revenue (COFINA)

Massachusetts Commonwealth - GO

Mets Queens Baseball Stadium Project, NY, Lease Revenue

Hickam Community Housing LLC

Chicago, IL - GO

Puerto Rico Infrastructure Financing Authority, Special Tax Revenue

Puerto Rico Highways & Transportation Authority, Transportation Revenue 

Bragg Communities, LLC

New Jersey Economic Development Authority - School Facilities Construction 

Ambac
Ratings(1)

Net Par
Outstanding (2)

BBB+

$

1,642

BIG

AA

BBB

BBB

BBB-

BIG

BIG

A-

BBB+

805

802

564

473

439

438

433

430

400

% of Total
Net Par
Outstanding

2.6 %

1.3 %

1.3 %

0.9 %

0.8 %

0.7 %

0.7 %

0.7 %

0.7 %

0.6 %

Total

$

6,426

10.2%

(1) 

Internal credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac Assurance. In 
cases where Ambac Assurance has insured multiple tranches of an issue with varying internal ratings, or more than one obligation of an issuer with varying 
internal ratings, a weighted average rating is used. Ambac Assurance credit ratings are subject to revision at any time and do not constitute investment 
advice. BIG denotes credits deemed below investment grade. 

(2)    Net Par includes capital appreciation bonds, which are reported at the par amount at the time of issuance of the insurance policy as opposed to the current 

accreted value of the bonds.

U.S. Structured Finance Portfolio 

Ambac’s portfolio of U.S. structured finance exposures is $13,816 
million, representing 22% of Ambac’s net par outstanding as of 
December 31,  2017,  and  an  18%  reduction  from  the  amount 
outstanding at December 31, 2016. This reduction in exposure was 
primarily  related 
to  residential  mortgage-backed  policies, 
including commutations and other de-risking initiatives on certain 
residential mortgage-backed policies.

Insured exposures include securitizations of mortgage loans, home 
equity loans, student loans, leases, operating assets, collateralized 
debt  obligations  ("CDO"),  collateralized 
loan  obligations 
(“CLO”), and other asset-backed financings, in each case where 
the  majority  of  the  underlying  collateral  risk  is  situated  in  the 
United States. Included within the lease securitization sector are 
pooled aircraft and rail car transactions.  Additionally, Ambac’s 
structured  finance  insured  portfolio  includes  secured  and 
unsecured  debt  issued  by  investor-owned  utilities,    structured 
insurance transactions and aircraft equipment trust certificates. See 
Note  6.  Financial  Guarantees  in  Force  to  the  Consolidated 
Financial Statements, included in Part II, Item 8 included in this 
Form 10-K, for exposures by bond type as of December 31, 2017. 

Structured finance exposures generally entail three forms of risk: 
(i) asset  risk,  which  relates  to  the  amount  and  quality  of  the 
underlying assets; (ii) structural risk, which relates to the extent to 
which the transaction’s legal structure and credit support provide 
protection from loss; and (iii) servicer risk, which is the risk that 

poor performance at the servicer or manager level contributes to 
a  decline  in  cash  flow  available  to  the  transaction.  Ambac 
Assurance seeks to mitigate and manage these risks through its 
risk management practices. 

Structured  securities  are  usually  designed  to  help  protect  the 
investors  and,  therefore,  the  guarantor  from  the  bankruptcy  or 
insolvency of the entity that originated the underlying assets as 
well as from the bankruptcy or insolvency of the servicer of those 
assets.  The  servicer  of  the  assets  is  typically  responsible  for 
collecting cash payments on the underlying assets and forwarding 
such payments, net of servicing fees, to a trustee for the benefit of 
the issuer. One potential issue is whether the sale of the assets by 
the originator to the issuer would be upheld in the event of the 
bankruptcy or insolvency of the originator and whether the servicer 
of the assets may be permitted or stayed from remitting to investors 
cash collections held by it or received by it after the servicer or the 
insolvency 
originator  becomes  subject 
proceedings. Another potential issue is whether the originator sold 
ineligible assets to the securitization transaction that subsequently 
deteriorated, and, if so, whether the originator has the willingness 
or  financial  wherewithal  to  meet  its  contractual  obligations  to 
repurchase those assets out of the transaction. Structural protection 
in a transaction, such as control rights that are typically held by 
the senior note holders, or guarantor in insured transactions, will 
determine the extent to which underlying asset performance can 
be  influenced  upon  non-performance  to  improve  the  revenues 
available to cover debt service. 

to  bankruptcy  or 

| Ambac Financial Group, Inc.   43   2017 FORM 10-K |

The following table presents the top five servicers by net par outstanding at December 31, 2017, for U.S. structured finance exposures: 

Servicer
($ in millions)

Specialized Loan Servicing, LLC

Bank of America N.A.

Wells Fargo Bank

Pennsylvania Higher Education Assistance Agency

Ocwen Loan Servicing, LLC

Bond Type

Mortgage-backed

$

Mortgage-backed

Mortgage-backed

Student Loan

Mortgage-backed

Net Par
Outstanding

% of Total
Net Par
Outstanding

1,636

1,555

997

994

971

2.6%

2.5%

1.6%

1.6%

1.5%

The table below shows Ambac’s ten largest structured finance transactions, as a percentage of total financial guarantee net par outstanding at 
December 31, 2017:

($ in millions)
Ballantyne Re Plc (2)

Progress Energy Carolinas, Inc.

Bond Type

Structured Insurance

Investor Owned Utility

Wachovia Asset Securitization Issuance II, LLC 2007-HE2 

Mortgage Backed Securities

Timberlake Financial, LLC

Structured Insurance

Wachovia Asset Securitization Issuance II, LLC 2007-HE1

Mortgage Backed Securities

Consolidated Edison Company of New York

Investor Owned Utility

Option One Mortgage Loan Trust 2007-FXD1

Mortgage Backed Securities

CenterPoint Energy Inc.

Niagara Mohawk Power Corporation

Duke Energy Ohio, Inc.

Total

Investor Owned Utility

Investor Owned Utility

Investor Owned Utility

Ambac
Rating(1)

Net Par
Outstanding

% of Total
Net Par
Outstanding

$

 BIG

 A-

 BIG

 BBB

 BIG 

 A 

 BIG 

 BBB+ 

 A 

 BBB+ 

900

558

547

520

381

347

289

276

257

255

$

4,330

1.4 %

0.9 %

0.9 %

0.8 %

0.6 %

0.6 %

0.5 %

0.4 %

0.4 %

0.4 %

6.9%

(1) 

Internal credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac Assurance, and 
for Ambac UK related transactions, based on the view of Ambac UK. In cases where Ambac Assurance or Ambac UK has insured multiple tranches of 
an issue with varying internal ratings, or more than one obligation of an issuer with varying internal ratings, a weighted average rating is used.  Ambac 
Assurance and Ambac UK credit ratings are subject to revision at any time and do not constitute investment advice.  BIG denotes credits deemed below 
investment grade. 

(2) 

Insurance policy issued by Ambac UK. 

International Finance Insured Portfolio 

Ambac’s  portfolio  of  international  finance  insured  exposures  is 
$16,812 million, representing 27% of Ambac’s net par outstanding 
as  of  December 31,  2017  and  a  3%  reduction  from  the  amount 
outstanding at December 31, 2016. This reduction in exposure was 
primarily the result of policy terminations within investor-owned 
utilities  and  asset-backed  securities  partially  offset  by  the 
weakening of the US dollar. Ambac’s international finance insured 
exposures include a wide array of obligations in the international 
markets, including infrastructure financings, asset-securitizations, 
utility  obligations  and  whole  business  securitizations  (e.g., 
securitizations  of  substantially  all  of  the  operating  assets  of  a 
corporation). Ambac has no insured exposure related to emerging 
markets.    See  Note  6.  Financial  Guarantees  in  Force  to  the 
Consolidated  Financial  Statements,  included  in  Part  II,  Item 8 
included  in  this  Form  10-K,  for  exposures  by  bond  type  as  of 
December 31, 2017.

Other European Union Exposures (“EU”)

When  underwriting  transactions  in  the  international  markets, 
Ambac  considered  the  specific  risks  related  to  the  particular 
country and region that could impact the credit of the issuer. These 
risks include the legal and political environment, capital markets 
dynamics, foreign exchange issues and the degree of governmental 
support. Ambac continues to assess these risks through its ongoing 
risk management. 

Ambac UK, which is regulated in the United Kingdom (“UK”), 
had been Ambac Assurance’s primary vehicle for directly issuing 
financial guarantee policies in the UK and the European Union 
with  $15,881  million  net  par  outstanding  in  those  markets  at 
December 31,  2017.  The  portfolio  of 
insured  exposures 
underwritten by Ambac UK is financially supported exclusively 
by the assets of Ambac UK and no capital support arrangements 
are in place with any other Ambac affiliate. 

Ambac's international exposures are principally in the United Kingdom; however, we also have exposures with credit risk based in various 
other EU member states, including Austria, France, Germany, Italy and Spain.  Several of these countries have experienced significant economic, 
fiscal and/or political strains such that the likelihood of default on such obligations is higher than when the policies were underwritten.  The 
Company’s exposures, net of reinsurance, to these countries are shown in the following table:

| Ambac Financial Group, Inc.   44   2017 FORM 10-K |

($ in millions)

Sub-sovereign

Infrastructure / operating asset backed

Investor-owned utility

Total

Total below investment grade

Austria

France

Germany

Italy

Spain

Total

$

$

$

— $

29

$

— $

817

$

— $

770

—

770

770

$

$

300

—

329

$

— $

—

39

39

39

$

$

60

—

877

$

— $

—

41

41

41

$

$

846

1,130

80

2,056

850

Ambac does not guarantee any sovereign bonds of the above EU 
countries.  However, the exposures classified as sub-sovereign may 
be impacted should there be adverse financial developments in the 
EU. Those exposures classified as infrastructure/operating asset 
backed  are  concession  based  where  the  underlying  assets 
independently generate cash flow without operational reliance on 
the  sovereign.  Of  the  below  investment  grade  exposures,  the 
investor-owned utilities (wind farm and mini hydro-electric plant) 
are either undergoing restructuring processes designed to address 
their performance issues (in the case of mini hydro-electric plant) 
or  have  already  been  the  subject  of  restructuring  processes  to 
mitigate  performance  issues  (wind  farm).  The  other  below 
investment  grade  exposure 
transaction,  where 
performance has been poorer than anticipated due to lower than 
forecast  traffic  volumes,  however,  performance  is  improving.  
Below investment grade is defined as those exposures with a credit 
rating below BBB-.

is  a  road 

Brexit:

In  a  non-binding  referendum  on  the  United  Kingdom’s  (“UK”) 
membership  in  the  European  Union  (“EU”)  in  June  2016,  a 
majority of those who voted approved the UK’s withdrawal from 
the  EU. As  a  result  of  the  referendum,  in  March  2017  the  UK 
government gave the EU formal notification of its intent to leave 
with  the  expectation  of  a  formal  withdrawal  two  years  later  on 
March  29,  2019. Also,  in  March  2017  the  UK  began  initial  (or 
phase  one)  negotiations  with  the  EU  regarding  the  terms  of  its 
departure (“Brexit”). On December 8, 2017, the EU and UK jointly 
announced,  as  set  out  in  the  Joint  Report  and  Commission 
Communication of 8 December (“Joint Report”), that “sufficient 
progress” in phase one of the separation negotiations between the 

parties had been made to permit Brexit negotiations to move on to 
a more detailed phase two beginning in January 2018. 

If no transitional arrangements or new agreement are put into place, 
Brexit will mean that the activities in the EEA of UK passporting 
insurers will become unlawful on March 29, 2019. They will lose 
their legal authorization to serve clients who benefit from policies 
issued by a UK incorporated insurer under freedom of services 
passporting  rights  (and  thereby  maybe  unable  to  legally  collect 
premiums or pay claims) and if they have branches in EEA Member 
States  they  may  be  legally  obliged  to  close  them  down  and  no 
longer be legally represented in those jurisdictions.

In addition to the direct impact on insurers cited above, general 
uncertainty and the perceptions as to the ultimate impact of Brexit 
may  adversely  affect  business  activity,  political  stability  and 
economic  conditions  in  the  UK,  the  Eurozone,  the  EU  and 
elsewhere.  The  economic  outlook  could  be  further  adversely 
affected by (i) the risk that one or more other EU countries could 
come under increasing pressure to leave the EU, (ii) the risk of a 
greater demand for independence by Scottish nationalists or for 
unification in Ireland and its impact on the United Kingdom, or 
(iii) the risk that the Euro as the single currency of the Eurozone 
could cease to exist. Any of these developments, or the perception 
that any of these developments are likely to occur, could have a 
material adverse effect on economic growth or business activity 
in the UK, the Eurozone, and/or the EU, and could result in the 
relocation  of  businesses,  cause  business  interruptions,  lead  to 
economic recession or depression, and impact the stability of the 
financial markets, the availability of credit, political systems or 
financial institutions and the financial and monetary system.  

The table below shows our ten largest international finance transactions as a percentage of total financial guarantee net par outstanding at 
December 31, 2017. Except where noted, all international finance transactions included in the table below are insured by Ambac UK: 

($ in millions)

Country-Bond Type

Ambac
Rating(1)

Net Par
Outstanding

% of Total
Net Par
Outstanding

Mitchells & Butlers Finance plc-UK Pub Securitisation

UK-Asset Securitizations

National Grid Electricity Transmission

Aspire Defence Finance plc
Capital Hospitals plc (2)

Posillipo Finance II S.r.l

Anglian Water
Ostregion Investmentgesellschaft NR 1 SA (2)

Telereal Securitisation plc

National Grid Gas

RMPA Services plc

Total

UK-Utility

UK-Infrastructure

UK-Infrastructure

Italy-Sub-Sovereign

UK-Utility

Austria-Infrastructure

UK-Asset Securitizations

UK-Utility

UK-Infrastructure

A+

A-

BBB+

A-

BBB-

A-

BIG

AA

A-

BBB+

$

1,475

1,135

928

922

817

793

770

766

732

621

2.4 %

1.8 %

1.5 %

1.5 %

1.3 %

1.3 %

1.2 %

1.2 %

1.2 %

1.0 %

$

8,959

14.3%

(1) 

Internal credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac Assurance, and 
for Ambac UK related transactions, based on the view of Ambac UK.  In cases where Ambac Assurance or Ambac UK has insured multiple tranches of 

| Ambac Financial Group, Inc.   45   2017 FORM 10-K |

an issue with varying internal ratings, or more than one obligation of an issuer with varying internal ratings, a weighted average rating is used. Ambac 
Assurance and Ambac UK credit ratings are subject to revision at any time and do not constitute investment advice.  BIG denotes credits deemed below 
investment grade. 

(2)  A portion of this transaction is insured by an insurance policy issued by Ambac Assurance. 

Additional Insured Portfolio Information 

Average Life of Insured Portfolio 

Ambac underwrote and priced financial guarantees based on the 
assumption  that  the  guarantees  would  remain  in  force  until  the 
maturity of the underlying bonds. Ambac estimates that the average 
life  of  its  guarantees  on  par  in  force  at  December 31,  2017  is 
approximately 10 years. The average life is determined by applying 
a  weighted  average  calculation,  using  the  remaining  years  to 
expected maturity of each guaranteed bond, and weighting them 
on the basis of the remaining net par guaranteed. Except for RMBS 
policies, no assumptions are made for non-contractual reductions, 
refundings  or  terminations  of  insured  issues.  RMBS  policies 
incorporate assumptions on expected voluntary and involuntary 
prepayments over the remaining life of the insured obligation.   The 
table  below  depicts  amortization  of  existing  guaranteed  net  par 
outstanding:

Net Par Outstanding Amortization (1)
($ in millions)

Estimated Net
Amortization

2018

2019

2020

2021

2022

2018-2022

2023-2027

2028-2032

2033-2037

After 2037

Total

$

$

$

5,352

4,117

4,074

4,001

3,742

21,286

12,952

10,298

11,615

6,565

62,716

(1)  Depicts amortization of existing guaranteed portfolio, assuming no 
advance refundings, as of December 31, 2017.  Expected maturities 
will differ from contractual maturities because borrowers may have 
the right to call or prepay guaranteed obligations.

| Ambac Financial Group, Inc.   46   2017 FORM 10-K |

Geographic Area 

Ratings Distribution 

The  following  table  sets  forth  the  geographic  distribution  of 
Ambac's  existing  guaranteed  net  par  outstanding  as  of 
December 31, 2017: 

Geographic Area
($ in millions)

Domestic:

Net Par
Amount
Outstanding

% of Total
Net Par 
Amount
Outstanding

Mortgage and asset-backed (1)

$

California

New York

New Jersey

Colorado

Florida

Puerto Rico

Texas

Illinois

Massachusetts

Pennsylvania

Other domestic

Total Domestic

International:

United Kingdom

Italy

Austria

Australia

France
Internationally diversified (2)

Other international

Total International Finance

Total

7,710

6,351

3,658

3,237

2,537

1,992

1,968

1,890

1,668

1,412

1,316

12,165

45,904

12.3 %

10.1 %

5.8 %

5.2 %

4.0 %

3.2 %

3.1 %

3.0 %

2.7 %

2.3 %

2.1 %

19.4 %

73.2 %

877

770

608

329

368

306

16,812

62,716

$

1.4 %

1.2 %

1.0 %

0.5 %

0.6 %

0.5 %

26.8 %

100.0%

(1)  Mortgage  and  asset-backed  obligations  includes  guarantees  with 
multiple locations of risk within the United States and is primarily 
comprised  of  residential  mortgage  and  commercial  asset-backed 
securitizations.  

The following tables provide a rating distribution of existing net 
par  outstanding  based  upon  internal  Ambac  credit  ratings  at 
December 31, 2017 and 2016 and a distribution by bond type of 
Ambac's below investment grade net par exposures at December 
31, 2017 and 2016. Below investment grade is defined as those 
exposures with an internal credit rating below BBB-: 

December 31,
Ambac Rating(1)

AAA

AA

A

BBB

BIG

Total

2017

2016

<1%

<1%

10

37

31

22

13

39

27

21

100%

100%

(1) 

Internal credit ratings are provided solely to indicate the underlying 
credit quality of guaranteed obligations based on the view of Ambac 
Assurance, and for Ambac UK related transactions, based on the view 
of Ambac UK. In cases where Ambac Assurance or Ambac UK has 
insured multiple tranches of an issue with varying internal ratings, 
or more than one obligation of an issuer with varying internal ratings, 
a weighted average rating is used. Ambac Assurance and Ambac UK 
credit ratings are subject to revision at any time and do not constitute 
investment advice. 

Bond Type ($ in millions)

Public Finance:

Lease and tax-backed (1)
General obligation (1)

Transportation
Housing (2)

Health care

Other

Net Par Outstanding -
December 31,

2017

2016

$

2,144

$

2,145

491

397

317

24

189

681

415

125

29

775

Total Public Finance

3,562

4,170

13,554

21.6 %

Summary of Below Investment Grade Exposure:

(2)   Internationally  diversified  may  include  components  of  U.S. 

Structured Finance:

exposure. 

Exposure Currency 

The table below shows the distribution by currency of Ambac's 
existing guaranteed net par outstanding as of December 31, 2017: 

Currency
($ in millions)

U.S. Dollars

British Pounds

Euros

Australian Dollars

A$

New Zealand Dollars NZ$

Net Par
Amount
Outstanding
in Base
Currency

Net Par
Amount
Outstanding
in U.S.
Dollars

Percentage
of Net Par
Amount
Outstanding

$

£

€

46,640

$

9,811

1,688

779

252

46,640

13,262

2,027

608

179

74.4 %

21.1 %

3.2 %

1.0 %

0.3 %

Total

$

62,716

100.0%

Residential mortgage-backed and 

home equity—first lien

Residential mortgage-backed and 
home equity—second lien

Student loans

Structured Insurance

Mortgage-backed and home 

equity—other

Other

Total Structured Finance

International Finance:

Other

Total International Finance

3,947

2,803

922

900

166

9

5,163

3,483

991

900

251

304

8,747

11,092

1,200

1,200

1,562

1,562

Total

$

13,509

$

16,824

(1)  Tax-backed  includes  $1,802  and  $1,871  of  Puerto  Rico  net  par  at 
December  31,  2017  and  2016,  respectively.    General  obligation 
includes $166 and $187 of Puerto Rico net par at December 31, 2017 
and  2016,  respectively.    Puerto  Rico  net  par  outstanding  includes 

| Ambac Financial Group, Inc.   47   2017 FORM 10-K |

capital appreciation bonds which are reported at the par amount at 
the time of issuance of the related insurance policy as opposed to the 
current accreted value of the bonds.

(2) 

Includes $317 and $125 of military housing net par at December 31, 
2017 and 2016, respectively.

The decrease in below investment grade exposures is primarily 
due to (i) upgrades of several public finance transactions, primarily 
stadiums,  in addition to runoff including commutations and claims 
paid by Ambac Assurance, partially offset by a military housing 
downgrade,  (ii)  reductions 
to  residential  mortgage-backed 
securities during the year as a result of prepayments by issuers, 
commutations  and  claims  presented  to Ambac Assurance,  (iii) 
cancellation of certain asset backed bonds and (iv) the termination 
of an international CDO transaction.  Despite the decrease in below 
investment  grade  net  par,  such  exposure  increased  in  relative 

proportion to the aggregate insured portfolio to 22% at December 
31, 2017, compared to 21% at December 31, 2016.  Based on our 
experience, below investment grade exposures typically run-off at 
a  slower  pace  than  investment  grade  exposures  and  therefore 
Ambac  is  subject  to  the  risk  that  its  insured  portfolio  will 
increasingly become concentrated in higher risk below investment 
grade exposures.  This risk may result in greater volatility in our 
results from operations and have adverse effects on our financial 
condition.  

U.S. residential mortgage-backed securities exposure 

Ambac  has  exposure  to  the  U.S.  mortgage  market  primarily 
through  direct  financial  guarantees  of  RMBS, 
including 
transactions that contain risks to first and second liens.  

The following tables provide, by vintage and type current net par outstanding of Ambac’s U.S. RMBS book of business: 

December 31, 2017

December 31, 2016

Year of Issue
($ in millions)

1998-2001

2002

2003

2004

2005

2006

2007

Total

Second
Lien

$

2

1

3

223

305

1,124

1,149

$

300

107

151

130

493

325

289

First-
lien
Sub-
prime

First-
lien
Mid-
prime

Other(1)

Total

$ — $

126

$

$

First-
lien
Sub-
prime

344

291

411

245

572

379

311

$

First-
lien
Mid-
prime

1

26

154

271

1,028

523

868

Second 
Lien

$

5

2

6

321

402

1,340

1,415

428

129

273

570

1,702

1,929

2,236

Other(1)

Total

$

169

$

519

322

651

838

2,040

2,297

2,716

3

80

1

38

55

122

468

21

119

217

872

434

694

—

—

—

32

46

104

308

$ 2,807

$ 1,795

$ 2,357

$

$ 7,267

$ 3,491

$ 2,553

$ 2,871

$

$ 9,383

% of Total RMBS Portfolio

38.6%

24.7%

32.4%

4.3%

100.0%

37.2%

27.2%

30.6%

5.0%

100.0%

% of Related Par Outstanding 
rated below investment 
grade (2)

99.9%

92.7%

96.3%

57.7%

95.2%

99.8%

93.4%

96.2%

57.2%

94.8%

(1)  Other primarily includes manufactured housing and lot loan exposures 

(2)  Ambac’s below investment grade internal ratings reflect bonds which are of speculative grade credit quality with the adequacy of future margin levels for 
payment of interest and repayment of principal potentially adversely affected by major ongoing uncertainties or exposure to adverse conditions. Ambac 
Assurance’s below investment grade category includes transactions on which claims have been submitted. 

Auction Rate Securities (“ARS”) and Variable Rate Demand 
Obligations (“VRDO”):

Ambac  insures  variable  rate  obligations  including  ARS  and 
VRDOs, both of which have rate resets and may have experienced 
liquidity  and/or  credit  stress  during  the  financial  crisis.   While 
market conditions have improved and most of Ambac’s exposures 
have stabilized or been refinanced away, there are still some issuers 
paying higher rates, and in the case of some VRDOs, both higher 
rates  and  faster  amortization  than  expected  due  to  failed 
remarketings.   Many  of Ambac’s ARS  exposures  are  paying  at 
failed auction rates that are relatively low in the current market 
and  remain  attractive  to  issuers.  The  following  table  sets  forth 
Ambac  Assurance’s  financial  guarantee  net  par  exposure 
outstanding, by bond type, relating to such variable rate exposures 
at December 31, 2017 and 2016:

($ in millions) December 31,

2017

2016

Investor-owned utilities

$

1,549

$

1,780

Healthcare

Student loans

Lease and tax-backed

Utility

Transportation

General Obligation

Other

Total

423

316

262

251

205

43

251

449

361

305

293

207

46

274

$

3,300

$

3,715

| Ambac Financial Group, Inc.   48   2017 FORM 10-K |

Reinsurance 

Ceded Reinsurance:

Ambac Assurance  has  reinsurance  in  place  pursuant  to  surplus 
share treaties and facultative agreements. As a primary financial 
guarantor, Ambac Assurance is required to honor its obligations to 
its  policyholders  whether  or  not  its  reinsurers  perform  their 
obligations  under  these  reinsurance  agreements.  For  exposures 
reinsured, Ambac Assurance  withholds  a  ceding  commission  to 
defray its underwriting and operating expenses. To minimize its 
exposure to losses from reinsurers, Ambac Assurance (i) monitors 
the financial condition of its reinsurers; (ii) is entitled to receive 
collateral from its reinsurance counterparties in certain reinsurance 
contracts;  and  (iii) has  certain  cancellation  rights  that  can  be 
exercised  by  Ambac  Assurance  in  the  event  of  rating  agency 
downgrades  of  a 
(among  other  events  and 
circumstances).  Ambac  Assurance  held  letters  of  credit  and 
collateral  amounting  to  $115.6  million  from  its  reinsurers  at 
December 31,  2017.  As  of  December 31,  2017,  the  aggregate 
amount of insured par ceded by Ambac Assurance to reinsurers 
under reinsurance agreements was $4,424 million, with the largest 
reinsurer  accounting  for  $3,668  million  or  5.5%  of  gross  par 
outstanding at December 31, 2017. 

reinsurer 

The following table shows the distribution, by bond type, of Ambac 
Assurance’s ceded guaranteed portfolio at December 31, 2017: 

Bond Type ($ in millions)

Public Finance:

Housing revenue

General obligation

Lease and tax-backed revenue

Transportation revenue

Higher education

Utility revenue

Health care revenue

Other

Total Public Finance

Structured Finance:

Student loan

Investor-owned utilities

Mortgage-backed and home 

equity

Asset-backed

Other

Total Structured Finance

Total Domestic

International Finance:

Investor-owned and public 

utilities

Transportation

Asset-backed

Total International Finance

Total

$

Assumed Reinsurance: 

Ceded Par
Amount
Outstanding

% of Gross
Par Ceded

$

968

837

719

221

131

86

46

104

3,112

438

414

87

42

192

1,173

4,285

98

25

16

139

4,424

13 %

12 %

6 %

10 %

7 %

4 %

5 %

12 %

9 %

26 %

11 %

1 %

9 %

12 %

8 %

9 %

2 %

2 %

1 %

1 %

7%

At  December 31,  2017,  assumed  par  outstanding  was  $219.1 
million. 

| Ambac Financial Group, Inc.   49   2017 FORM 10-K |

($ in millions) Year Ended December 31,

2017

2016

2015

RESULTS OF OPERATIONS

Revenues:

Net premiums earned

Net investment income

Net other-than-temporary impairment losses

Net realized investment gains

Change in fair value of credit derivatives

Net gains (losses) on interest rate derivatives

Other income (expense)

Income (loss) on variable interest entities

Expenses:

Losses and loss expenses (benefit)

Insurance intangible amortization

Operating expenses

Interest expense

Goodwill impairment

Provision for income taxes

Less: Net income attributable to the noncontrolling interest

$

175.3

$

197.3

$

361.0

(20.2)

5.4

16.4

59.6

(0.7)

19.7

513.2

150.9

121.5

119.9

—

44.5

—

313.4

(21.8)

39.3

20.1

(50.3)

17.4

(14.1)

(11.5)

174.6

113.7

124.3

—

30.7

(0.5)

Net income (attributable to common shareholders)

$

(328.7) $

74.8

$

312.6

266.3

(25.7)

53.5

41.7

(42.5)

7.2

31.6

(768.7)

169.6

102.7

116.5

514.5

17.4

(0.7)

493.4

The  following  paragraphs  describe  the  consolidated  results  of 
operations of Ambac and subsidiaries for 2017, 2016 and 2015 and 
its financial condition as of December 31, 2017 and 2016.

Net Premiums Earned.  Net premiums earned primarily represent 
the  amortization  into  income  of  insurance  premiums.  Net 
premiums earned for the year ended December 31, 2017, decreased 
by $22.0 million or 11.2% as compared to net premiums earned 
for the year ended December 31, 2016.  Net premiums earned for 
the year ended December 31, 2016, decreased by $115.3 million 
or 36.9% as compared to net premiums earned for the year ended 
December 31, 2015.  

We  present  accelerated  premiums,  which  result  from  calls  and 
other accelerations of insured obligations separate from normal net 
premiums  earned. When  an  insured  bond  has  been  retired,  any 
remaining unearned premium revenue ("UPR") is recognized at 
that time to the extent the financial guarantee contract is legally 
revenue.  For 
extinguished,  causing  accelerated  premium 
installment premium paying transactions, we offset the recognition 
of any remaining UPR by the reduction of the related premium 
receivable  to  zero  (as  it  will  not  be  collected  as  a  result  of  the 
retirement),  which  may  cause  negative  accelerated  premium 
revenue.    Included  within  accelerated  premiums,  were  negative 
accelerations of $0.4 million, $7.6 million, and $5.1 million, for 
the years ended December 31, 2017, 2016 and 2015, respectively.

Normal net premiums earned are impacted by the following:

•  The  runoff  of  the  insured  portfolio  occurring  through 
transaction  terminations,  calls  and  scheduled  maturities, 
which had a negative impact.  

•  Changes  in the  collectability of  certain Structured Finance 
premium receivables resulted in an increase in net premiums 
earned of $0.3 million, $0.8 million and $0.5 million for the 

years ended December 31, 2017, 2016 and 2015, respectively. 
Changes in the collectability of a certain International Finance 
premium receivable resulted in a decrease in net premiums 
earned of $0.4 million for the year ended December 31, 2017.

•  Pre-refundings of insured securities, primarily Public Finance 
transactions.    Since  the  maturity  date  of  pre-refunded 
securities  is  shortened  (to  a  specified  call  date  from  its 
previous legal maturity), normal net premiums earned will 
increase over the remaining period of the related policy.

•  The strengthening or weakening of the U.S. dollar relative to 
the  British  Pound  since  Ambac's  wholly-owned  UK 
subsidiary, Ambac UK, operates in the United Kingdom and 
the British Pound is its functional currency.

Normal  net  premiums  earned  and  accelerated  premiums  are 
reconciled  to  total  net  premiums  earned  in  the  table  below, 
including a breakdown of net premiums earned by market:

($ in millions)
Year Ended December 31,

2017

2016

2015

Public finance

Structured finance

International finance

Total normal premiums

earned

Public Finance

Structured Finance

International Finance

Accelerated earnings

$

$

$

$

62.4

21.7

26.7

110.8

46.7

3.3

14.5

64.5

Total net premiums earned $

175.3

$

$

$

$

$

84.8

27.7

32.4

144.9

52.5

3.6

(3.7)

52.4

197.3

$

$

$

$

$

97.1

34.2

43.9

175.2

97.3

1.1

39.0

137.4

312.6

Net  Investment  Income.    Net  investment  income  primarily 
consists  of  interest  receipts  and  net  discount  accretion  on  fixed 

| Ambac Financial Group, Inc.   50   2017 FORM 10-K |

income securities classified as available-for-sale, including $262.1 
million, $195.4 million and $175.2 million in 2017, 2016 and 2015, 
respectively related to investments in Ambac-insured securities. 
Also, included in net investment income are net mark-to-market 
gains of $18.2 million, $27.7 million and $12.6 million in years 
ended 2017, 2016 and 2015, respectively, arising from pooled fund 
investments  and  certain  other  investments  that  are  classified  as 
trading  securities  with  changes  in  market  value  recognized  in 
earnings.  Most trading securities are in the Ambac UK portfolio 
and consist of pooled fund investments in diversified asset classes 
including equities, hedge funds, loans, insurance-linked securities 
and property.  Ambac Assurance has also invested in loan funds as 
part of its overall portfolio allocation strategy.  In 2017, Ambac 
invested in debt instruments issued by Corolla Trust.  Refer to Note 
3. Special Purpose Entities, Including Variable Interest Entities to 
the Consolidated Financial Statements included in Part II, Item 8 
in this Form 10-K, for more information on the Corolla Trust. 

Net investment income  increased $47.5 million for the year ended 
December 31, 2017 compared to 2016 and $47.2 million for the 
year ended December 31, 2016 compared to 2015.  The increase 
in income in 2017 is primarily due to greater allocation to higher-
yielding Ambac-insured  securities,  partially  offset  by  lower  net 
gains on trading securities,  Investment income on Ambac-insured 
securities  increased  $66.7  million  in  2017  compared  to  2016, 
including  $40.9  million  related  to  RMBS  securities  driven 
primarily  by  reprojected  cash  flows  for  the  restructuring  of 
deferred claims included in the Rehabilitation Exit Transactions 
completed  in  the  first  quarter  of  2018.    Income  from Ambac-
insured securities also reflects additional purchases of Puerto Rico 
bonds over the course of 2017 and additional purchases by Ambac 
UK  of  its  insured  bonds.    Net  income  from  trading  securities 
declined  in  2017  primarily  due  to  catastrophe-driven  losses  on 
insurance-linked securities and lower returns on loans and equities, 
net of foreign exchange effects.  The strengthening British pound 
sterling relative to the U.S. dollar in 2017 partially offset strong 
equity market gains in Ambac UK's pooled fund holdings.  This 
compares to 2016 when the pound declined.      

The  increase  net  investment  income  in  2016  is  attributable  to 
growth in the size of the portfolio and higher average returns.The 
larger portfolio in 2016 primarily resulted from the receipt of $995 
million in January 2016 in connection with a representation and 
warranty  settlement  with  JP  Morgan.    Higher  average  portfolio 
returns in 2016 reflect higher allocations to Ambac insured RMBS, 
other securities guaranteed by Ambac Assurance or Ambac UK 
and pooled funds.  Net investment income from pooled funds in 
2016  increased  $15.1  million  from  2015,  due  primarily  to  new 
investments in high-yield loan funds which performed well during 
the year and stronger returns in equity markets and asset backed 
strategies, partially offset by lower gains from property and hedge 
funds. 

Net  investment  income  will  be  significantly  impacted  in  future 
periods as a result of the Rehabilitation Exit Transactions as further 
described in Note 1. Background and Business Description and 
Note  17.  Subsequent  Events  of  the  Consolidated  Financial 
Statements in Part II, Item 8 of this Form 10-K. See also the Pro 
Forma Balance Sheet section included in Part II, Item 7 of this 
Form 10-K. 

Net Other-Than-Temporary Impairment Losses.  Net other-than-
temporary  impairment  losses  recorded  in  earnings  include  only 

credit  related  impairment  amounts  on  securities  to  the  extent 
management does not intend to sell and it is not more likely than 
not that the Company will be required to sell before recovery of 
the amortized cost basis. Non-credit related impairment amounts 
are recorded in other comprehensive income. Alternatively, non-
credit related impairment is reported through earnings as part of 
net  other-than-temporary  impairment  losses  if  management 
intends  to  sell  securities  or  it  is  more  likely  than  not  that  the 
Company will be required to sell before recovery of amortized cost 
less any current period credit impairment.

Ambac's  other-than-temporary  impairments  for  the  years  ended 
December  31,  2017,  2016  and  2015  related  to  credit  losses  on 
certain Ambac-wrapped securities stemming primarily from cash 
flow  projections  and  to  the  company’s  intent  to  sell  certain 
securities  that  were  in  an  unrealized  loss  position  as  of  the 
impairment  evaluation  dates.  During  the  Segregated  Account 
Rehabilitation  Proceedings,  changes  in  the  estimated  timing  of 
claim payments resulted in adverse changes in projected cash flows 
on certain impaired Ambac-wrapped securities. Ambac estimated 
the timing of such claim payment receipts, but the actual timing 
of such payments were at the sole discretion of the Rehabilitator.  
Refer  to  Note  1.  Background  and  Business  Description  to  the 
Consolidated Financial Statements for more information on the 
Segregated Account  and  the  Segregated Account  Rehabilitation 
Proceedings.   

Ambac’s  assessment  about  whether  a  decline  in  value  is  other-
than-temporary reflects management’s current judgment regarding 
facts and circumstances specific to a security and the factors noted 
above, including Ambac's intention to sell securities and ability to 
hold  temporarily  impaired  securities  until  recovery.  If  that 
judgment  changes, Ambac  may  ultimately  record  a  charge  for 
other-than-temporary impairment in future periods.

Net Realized Investment Gains.  The following table provides a 
breakdown of net realized gains, for the periods presented:

($ in millions)

Year Ended December 31,

2017

2016

2015

Net gains on securities sold

or called

Foreign exchange gains

(losses)

Total net realized gains

$

$

10.1

$

9.1

$

47.7

(4.7)

5.4

$

30.2

39.3

$

5.8

53.5

Net gains during the year ended December 31, 2017 included the 
impact  of  sales  of  securities  to  fund  the  February  12,  2018 
Rehabilitation  Exit Transactions  as  further  described  in Note  1. 
Background  and  Business  Description  of  the  Consolidated 
Financial Statements in Part II, Item 8 of this Form 10-K.  Net 
gains during the year ended December 31, 2016 included foreign 
exchange related gains of $22.7 million on short-term and trading 
securities held by Ambac UK and denominated in non-functional 
currencies (primarily US dollars and euros) and $8.3 million of 
realized currency gains related to available-for-sale securities that 
were sold by Ambac UK during the year.   Net gains during year 
ended December 31, 2015 arose primarily from the sale of Ambac 
insured  student  loan  securities  in  connection  with  a  financial 
guarantee commutation transaction. 

| Ambac Financial Group, Inc.   51   2017 FORM 10-K |

Change  in  Fair  Value  of  Credit  Derivatives.       The  gain  from 
change  in  fair  value  of  credit  derivatives  for  the  year  ended 
December 31, 2017 was $16.4 million, as compared to the gains 
of $20.1 million and $41.7 million for the years ended December 
31, 2017, 2016 and 2015, respectively.  The gain for 2017 was 
mainly  due  to  the  reversal  of  unrealized  losses  from  swap 
terminations, including the remaining adversely classified credit 
in  the  portfolio,  in  addition  to  reference  obligation  price 
improvements. The gain for 2016 reflects increased pricing levels 
and a stronger credit assessment on an adversely classified credit 
in the portfolio, partially offset by the impact of lower Ambac CVA 
discount rates.  The gain for 2015 was primarily due to the reversal 
of  unrealized  losses  on  adversely  classified  student  loan  credit 
default swaps in connection with termination of the contracts in 
addition to the positive impacts of other portfolio runoff, currency 
exchange rates and higher Ambac CVA discount rates. 

Realized gains and other settlements on credit derivative contracts 
represent  premiums  received  and  accrued  on  such  contracts 
including termination fees.  Realized gains and other settlements 
were $1.6 million, $0.9 million and $2.8 million for 2017, 2016 
and  2015,  respectively.    Included  in  realized  gains  and  other 
settlements on credit derivatives were fees received in connection 
with transaction terminations of $1.0 million, $0.0 million and $1.3 
million for the years 2017, 2016 and 2015, respectively.  Excluding 
the impact of termination fees, the declines over time are due to 
continued runoff of the credit derivative portfolio.There were no 
loss or settlement payments in the periods presented.  Unrealized 
gains (losses) on credit derivative contract reflect the impact of all 
other factors on the overall change in fair value of credit derivatives 
noted above. 

See Note 9. Fair Value Measurements to the Consolidated Financial 
Statements included in Part II, Item 8 in this Form 10-K for a further 
description of Ambac’s methodology for determining the fair value 
of  credit  derivatives.  The  table  below  indicates  the  impact  of 
incorporating Ambac’s own credit risk into the fair value of credit 
derivatives as of December 31, 2017 and 2016:

($ in millions) December 31,

2017

2016

Mark-to-market liability of credit

derivatives, excluding CVA

CVA on credit derivatives

Credit derivative liability at fair value

$

$

0.7

(0.1)

0.6

$

$

17.2

(1.9)

15.3

Net Gain (Loss) on Interest Rate Derivatives. The interest rate 
derivatives portfolio is positioned to benefit from rising rates as a 
partial  economic  hedge  against  interest  rate  exposure  in  the 
financial guarantee and investment portfolios.  Results in Net gain 
(loss) on interest rate derivatives generally reflect mark-to-market 
gains (losses)  in the portfolio caused by increases (declines) in 
forward interest rates during the periods, the carrying cost of the 
net liability position of the portfolio, and the impact of the Ambac 
CVA and counterparty credit adjustments as discussed below. 

Net  gains  for  the  year  ended  December 31,  2017  were  $59.6 
million, reflecting an improvement of $109.8 million as compared 
to the net losses of $50.3 million for the year ended December 31, 
2016.  The net gain for 2017 was primarily driven by the June 2017 
commutation  of  interest  rate  swaps  with  a  structured  finance 
vehicle counterparty (the "Augusta swaps").  The net gains (losses) 
on these swaps were $42.2 million for the year ended December 

31, 2017.  Results for 2017 also included gains from rising interest 
rates  and  lower  counterparty  credit  adjustments  on  certain 
uncollateralized derivative assets, 

Net losses reported in interest rate derivatives for the year ended 
December 31,  2016  were  $50.3  million,  a  deterioration  of  $7.7 
million  as  compared  to  net  losses  of  $42.5  million  for  the  year 
ended December 31, 2015.  The interest rate derivatives loss for 
2016 was primarily driven by the impact lower credit spreads that 
reduced the Ambac CVA on derivative liabilities and the carrying 
cost of the portfolio.  Despite substantial interest rate movements 
within 2016, the overall change in rates from the beginning to the 
end of the year did not have a significant impact on full year results.  
Results for 2015 reflect mark-to-market losses caused by declines 
in forward interest rates, net of the impact of the Ambac CVA as 
discussed  below.    Additionally,  counterparty  credit  valuation 
adjustments  on  certain  interest  rate  swap  assets  increased  the 
overall mark-to-market losses for 2015.

The  fair  value  of  derivatives  include  valuation  adjustments  to 
reflect Ambac’s own credit risk and counterparty credit risk. Within 
the interest rate derivatives portfolio, an Ambac CVA is generally 
applicable for uncollateralized derivative liabilities that may not 
be offset by derivative assets under a master netting agreement. 
For the periods presented, an Ambac CVA was applicable only to 
the Augusta swaps that were terminated in June 2017 as discussed 
above. Changes in the Ambac CVA on Augusta swaps is included 
in  the  2017  net  gains  from  Augusta  swaps  described  above. 
Inclusion  of  the  Ambac  CVA  in  the  valuation  of  interest  rate 
derivatives contributed (losses) gains of $(33.8) million and $14.2 
million  in  2016  and  2015,  respectively.  Counterparty  credit 
adjustments  are  generally  applicable 
for  uncollateralized 
derivative  assets  that  may  not  be  offset  by  derivative  liabilities 
under a master netting agreement. Inclusion of counterparty credit 
adjustments in the valuation of interest rate derivatives resulted in 
gains (losses) within Net gain (loss) on interest rate derivatives of 
$4.1 million, $2.5 million  and $(17.6) million for 2017, 2016 and 
2015, respectively. 

The  table  below  indicates  the  impact  of  incorporating Ambac’s 
own  credit  risk  into  the  fair  value  of  the  derivative  portfolio 
(excluding credit derivatives) as of December 31, 2017 and 2016:

($ in millions) December 31,

2017

2016

Interest rate derivatives mark-to-market

liability, excluding CVA

CVA on interest rate derivatives portfolio

Interest rate derivatives portfolio
liability at fair value

$

$

82.2

$

348.8

—

(44.9)

82.2

$

303.9

Net  Realized  Gains  (Losses)  on  Extinguishment  of  Debt.  Net 
realized gains on extinguishment of debt was $4.9 million for the 
year ended December 31, 2017, compared to gains of $4.8 million
and $0.1 million for the years ended December 31, 2016 and 2015, 
respectively.  The gains for the years ended December 31, 2017 
and 2016 included gains from the settlements of purchased surplus 
notes below their carrying values and gains from the settlements 
of certain residual obligations related to previously called surplus 
notes. The gains for the year ended December 31, 2015 included 
gains from the settlement of certain residual obligations related to 
previously  called  surplus  notes,  partially  offset  by  losses  from 
settlement of an investment agreement above its carrying value 

| Ambac Financial Group, Inc.   52   2017 FORM 10-K |

and  the  accelerated  recognition  of  the  unamortized  discount  on 
surplus notes purchased during the year.

Other Income. The table below summarizes other income.

($ in millions)
Year Ended December 31, 

2017

2016

2015

Foreign exchange gain/(loss) $

(2.6) $

Other

1.9

7.8

9.7

Total other income (loss)

$

(0.7) $

17.4

$

$

(2.0)

9.2

7.2

Foreign exchange gains/(losses) are unrelated to investments or 
loss reserves but include gains/(losses) relating to foreign currency 
changes on present value of premium receivables denominated in 
a  subsidiary's  non-functional  currency,  in  addition  to  foreign 
exchange  gains/(losses)  on  cash.    Other  includes  various  fees, 
primarily consent and waiver fees.  In 2017, income from such fees 
is partially offset by charges in connection with the Rehabilitation 
Exit Transactions (as defined in Note 1. Background and Business 
Description to the Consolidated Financial Statements included in 
Part II, Item 8 in this Form 10-K).  In addition to various fees for 
the  year  ended  December 31,  2016  other  includes  insurance 
recoveries on a partially cancelled asset-backed transaction which 
is consolidated as a VIE, interest recoveries related to previously 
paid legal fees related to a disputed premium receivable partially 
offset by a loss mitigation payment on an international investor-
owned utility transaction which is consolidated as a VIE.

Income  (loss)  on  Variable  Interest  Entities.  Included  within 
Income (loss) on variable interest entities are income statement 
amounts  relating  to VIEs  consolidated  under  the  Consolidation 
Topic of the ASC as a result of Ambac's variable interest arising 
from  financial  guarantees  written  by  Ambac's  subsidiaries, 
including  gains  or  losses  attributable  to  consolidating  or 
deconsolidating VIEs during the periods reported.  Generally, the 
Company’s consolidated VIEs are entities for which Ambac has 
provided financial guarantees on all of or a portion of its assets or 
liabilities.  In consolidation, assets and liabilities of the VIEs are 
reported at fair value and the related insurance assets and liabilities 
are eliminated. However, the amount of VIE net assets (liabilities) 
that remain in consolidation generally result from the net positive 
(negative) present value of projected cash flows from (to) the VIEs 
which  are  attributable  to Ambac’s  insurance  subsidiaries  in  the 
form of financial guarantee insurance premiums, fees and losses. 
In the case of VIEs with net negative projected cash flows, the net 
liability  is  generally  to  be  funded  by  Ambac’s  insurance 
subsidiaries  through  insurance  claim  payments.  Differences 
between the net carrying value of the insurance accounts under the 
Financial Services—Insurance Topic of the ASC and the carrying 
value of the consolidated VIE’s net assets or liabilities are recorded 
through income at the time of consolidation or deconsolidation. 

Income  (loss)  on  variable  interest  entities  was  $19.7  million, 
$(14.1) million and $31.6 million for the years ended December 
31, 2017, 2016 and 2015, respectively. Income on variable interest 
entities for year ended December 31, 2017 is due primarily to a 
higher net asset value of a VIE related to an increase in projected 
financial guarantee insurance premiums.  Income (loss) on variable 
interest entities for the years ended December31, 2016 and 2015 
reflected  an  increase  (decrease)  in  the  fair  value  of  net  assets 
primarily  due  to  the  increase  (decrease)  in  the  CVA  applied  to 
certain  VIE  note  liabilities  that  include  significant  projected 

financial  guarantee  claims.      Other  than  those  transactions 
involving significant projected financial guarantee claims,  the fair 
value of VIE net assets increased producing net gains in 2016 and 
2015. Refer to Note 3. Special Purpose Entities, Including Variable 
Interest Entities to the Consolidated Financial Statements included 
in Part II, Item 8 in this Form 10-K for further information on the 
accounting for VIEs.

Losses and Loss Expenses.  Losses and loss expenses are based 
upon  estimates  of  the  aggregate  losses  inherent  in  the  non-
derivative  financial  guarantee  portfolio  for  insurance  policies 
issued  to  beneficiaries,  including  unconsolidated VIEs.    Losses 
and loss expenses include interest on Deferred Amounts pursuant 
to  the  Segregated  Account  Rehabilitation  Plan  that  were 
discharged on February 12, 2018. 

Ambac  records  as  a  component  of  its  loss  reserve  estimate, 
subrogation  recoveries  related  to  securitized  loans  in  RMBS 
transactions with respect to which Ambac Assurance is pursuing 
claims for breaches of representations and warranties described 
herein. Ambac  does  not  include  potential  recoveries  attributed 
solely  to  fraudulent  inducement  claims  in  our  litigations  in  our 
estimate of  subrogation recoveries. Generally, the sponsor of an 
RMBS transaction provided representations and warranties with 
respect  to  the  securitized  loans,  including  representations  with 
respect to the loan characteristics, the absence of borrower fraud 
in the underlying loan pools or other misconduct in the origination 
process and attesting to the compliance of loans with the prevailing 
underwriting  policies.  Ambac  has  recorded  representation  and 
warranty subrogation recoveries, net of reinsurance, of $1.8 billion 
and  $1.9  billion  at  December  31,  2017  and  2016,  respectively. 
Refer to Note 2. Basis of Presentation and Significant Accounting 
Policies to the Consolidated Financial Statements included in Part 
II, Item 8 in this Form 10-K for more information regarding the 
estimation  process  for  representation  and  warranty  subrogation 
recoveries.

Losses and loss expenses (benefit) for the year ended December 
31, 2017, 2016 and 2015 were $513.2 million,  $(11.5) million and 
$(768.7)  million,  respectively.    The  following  table  provides 
details,  by  bond  type,  for  losses  and  loss  expenses  (benefit) 
incurred for the periods presented:

($ in millions)
Year Ended December 31,
RMBS (1)

Domestic Public Finance

Student Loans

Ambac UK

All other credits

Interest on Deferred 
Amounts
Totals (2)

2017

2016

2015

$

(40.8) $

(298.9) $

(721.1)

476.3

25.1

(128.3)

3.0

169.0

(111.9)

56.7

2.8

141.8

(251.1)

(94.5)

(5.7)

177.9

170.8

161.9

$

513.2

$

(11.5) $

(768.7)

(1)  The  loss  and  loss  expense  (benefit)  associated  with  changes  in 
estimated representation and warranties for the year ended December 
31,  2017,  2016  and  2015  was  $72.0,  $(71.4),  and  $(303.6), 
respectively.  

(2)   Includes loss expenses incurred of $81.6 million, $51.9 million and 
$32.8 million for the year ended December 31, 2017, 2016 and 2015, 
respectively.  

| Ambac Financial Group, Inc.   53   2017 FORM 10-K |

Losses and loss expenses for 2017 were driven by the following:

•  Higher  projected  losses  in  domestic  public  finance  largely 
driven  by  adverse  development  on  Puerto  Rico  and  the  
Military Housing sector;

•  Interest on deferred amounts; partially offset by;

•  Lower projected losses in the Ambac UK portfolio primarily 
due  to  the  confidential  settlement  of  litigation  brought  by 
Ambac UK in the name of Ballantyne against JPMIM and 
from activities executed by the Ballantyne trust that indirectly 
reduced future expected claims on the Ambac insured notes; 

•  Foreign exchange gains of $28.9 million.  A portion of Ambac 
UK's loss reserves are denominated in currencies other than 
its functional currency of British Pounds resulting in incurred 
losses 
the  British  Pound  depreciates 
(appreciates);

(gains)  when 

•  A $49.7 million benefit due to reimbursements of claims paid 
with  respect  to  two  transactions  that  benefited  from  a 
mortgage insurance settlement.

Losses and loss expenses (benefit) for 2016 were driven by the 
following:

•  Lower  projected  losses  in  the  RMBS  portfolio  due  to 
improved  deal  performance,  higher  representation  and 
warranty subrogation recoveries and a settlement of a non-
representation and warranty dispute with regards to an Ambac 
insured RMBS transaction;

•  The  positive  impact  of  executed  commutations  and  an 
improved outlook with regards to our risk remediation efforts 
on student loan policies primarily associated with student loan 
bonds acquired during 2016; partially offset by;

•  Higher  projected  losses  in  domestic  public  finance  for  the 
year  ended  December  31,  2016  largely  driven  by  adverse 
development in Puerto Rico;

•  Interest on deferred amounts;

•  Increased projected losses in the Ambac UK portfolio for the 
year  ended  December  31,  2016  primarily  due  to  foreign 
exchange  losses  of  $77.6  million  partially  offset  by  lower 
interest rates. 

Losses and loss expenses (benefit) for 2015 were driven by the 
following:

•  Lower  projected  losses  in  the  RMBS  portfolio  due  to 
improved  deal  performance,  lower  interest  rates  and  
increases in our estimate of RMBS subrogation recoveries as 
a result of continuous efforts and ongoing assessments of the 
value of our claims;

•  The positive impact of executed commutations, an improved 
outlook with regards to our risk remediation efforts and lower 
interest rates on student loan policies;

•  Decrease in projected losses for the year ended December 31, 
2015 due to reduced claim expectations for an Ambac UK 

transaction resulting from proactive remediation efforts and 
lower  interest  rates,  partially  offset  by  foreign  exchange 
losses of $24.8 million; partially offset by;

•  Higher  projected  losses  in  domestic  public  finance  for  the 
year  ended  December  31,  2015  largely  driven  by  adverse 
development in Puerto Rico; 

•  Interest on deferred amounts.

The following table provides details of net claims recorded, net of 
reinsurance for the affected periods:

($ in millions)
Year Ended December 31,
Claims recorded (1)(2)(3)
Subrogation received (4)

Net Claims Recorded

2017

2016

2015

$

$

343.7

(244.0)

99.7

$

$

391.9

$

367.9

(1,355.4)

(308.4)

(963.5) $

59.5

(1)  Claims  recorded  include  (i) claims  paid,  including  commutation 
payments and (ii) changes to claims presented and not yet presented 
through the balance sheet date for policies which were allocated to 
the Segregated Account. Item (ii) includes permitted policy claims 
for policies allocated to the Segregated Account that were presented 
and approved by the Rehabilitator of the Segregated Account but not 
paid  through  to  the  balance  sheet  date  in  accordance  with  the 
Segregated Account  Rehabilitation  Plan  and  associated  rules  and 
guidelines.  Amounts recorded for claims not yet presented and/or 
permitted are based on management’s judgment.  Claims recorded 
exclude interest accrued on Deferred Amounts.

(2)  Claims  recorded  includes  claims  paid  (including  commutation 
payments)  of  $310.8,  $365.5,  and  $345.0  for  the  year  ended 
December 31, 2017, 2016 and 2015, respectively.

(3)  Claims  recorded  includes  claims  paid  on  Puerto  Rico  policies  of 
$142.5, $63.3 and $0 for the year ended December 31, 2017, 2016 
and 2015, respectively.

(4)  Subrogation received for the year ended December 31, 2017 includes 
$49.7  ($49.8  gross  of  reinsurance)  related  to  a  reimbursement  of 
claims due to a mortgage insurance settlement.  Subrogation received 
for the year ended December 31, 2016 includes $992.8 ($995 gross 
of reinsurance) received from the settlement of representation and 
warranty related litigation with JP Morgan and $99.1 ($100.3 gross 
of reinsurance) related to the Countrywide Investor Settlement. 

Operating  Expenses.    Operating  expenses  consist  of  gross 
operating expenses plus reinsurance commissions.  The following 
table  provides  details  of  operating  expenses  for  the  periods 
presented:

($ in millions)
Year Ended December 31,

Gross operating expenses

Reinsurance commissions, 

net

Total operating expenses

$

$

2017

2016

2015

121.1

$

112.1

$

102.3

0.4

1.6

0.4

121.5

$

113.7

$

102.7

Gross operating expenses for the year ended December 31, 2017
are $121.1 million, an increase of $9.0 million from gross operating 
expenses for the year ended December 31, 2016.  The increase was 
primarily due to the following:

•  Higher  non-compensation  costs  primarily  due  to  (i)  $21.7 
million  incremental  legal,  consulting  and  advisory  costs 
related  to  the  Rehabilitation  Exit  Transactions,  (ii)  $5.3 
million incremental OCI legal and consulting costs primarily 

| Ambac Financial Group, Inc.   54   2017 FORM 10-K |

in connection with the Rehabilitation Exit Transactions, and 
(iii) $4.1 million increase in state taxes primarily due to a $2.3 
million reduction of accrued state income taxes in 2016 due 
to  the  final  resolution  of  state  insurance  tax  assessments.  
These increased costs were partially offset by (i) a reduction 
in litigation contingencies of $8.5 million and (ii) a reduction 
in costs associated with stockholder activism of $5.9 million 
in 2016.

•  Lower  compensation  costs  related 

to  salaries,  post 
employment  costs,  including  severance,  partially  offset  by 
increased long term incentive compensation costs due to an 
improvement 
in  performance  factors.  Although  post-
employment costs have decreased from 2016, the Company 
reduced headcount in 2017 resulting in severance charges.  
These charges are lower than prior year due to 2016 including 
severance costs related to the former CEO.

Gross operating expenses for the year ended December 31, 2016 
are $112.1 million, an increase of $9.8 million from gross operating 
expenses for the year ended December 31, 2015.  The increase was 
primarily due to the following:

•  Higher  compensation  costs  related  to  severance  and  post 
employment costs, due to changes in CEO and reductions in 
staff partially offset by reduced salary and  bonus expense.

•  Higher  non-compensation  costs  related  to  stockholder 
activism,  the  establishment  of  $10.0  million  of  litigation 
contingencies, higher audit fees, increased outside services 
in  non-
and  higher  regulatory  costs.  The 
compensation  costs  were  partially  offset  by  reductions  in 
premises  costs  and  premium  taxes.    Costs  associated  with 
stockholder activism amounted to $5.9 million and include 
legal, consulting and outside services fees. 

increase 

As  a  consequence  of  the  Segregated  Account  Rehabilitation 
Proceedings,  the  Rehabilitator  retained  operational  control  and 
decision-making authority with respect to all matters related to the 
Segregated Account, including the hiring of advisers. Legal and 
consulting services provided for the benefit of OCI amounted to 
$11.7 million, $6.4 million and $5.6 million for the years ended 
December 31, 2017, 2016 and 2015, respectively.  The increase in 
2017 compared to 2016 is driven by higher advisor fees primarily 
related to the Rehabilitation Exit Transactions.  The increase in 
2016  compared  to  2015  is  driven  by  an  increase  in  monthly 
consulting adviser fees and higher legal fees as a result of a change 
in legal advisers. 

Subsequent  to  the  Segregated  Account's  effective  exit  from 
rehabilitation, advisory services provided for the benefit of OCI 
will be reduced, although certain advisors will receive transaction 
or event based payments at the time of exit.

Interest Expense.  Interest expense includes accrued interest on  
surplus  notes  issued  by Ambac Assurance  and  the  Segregated 
Account,  secured  borrowing  notes  outstanding,  investment 
agreements  and  fees  on  unfunded 
lending  commitments. 
Additionally,  interest  expense  includes  discount  accretion  on 
surplus notes as their carrying value is at a discount to par. 

The following table provides details by type of obligation for the 
periods presented:

($ in millions)
Year Ended December 31,

2017

2016

2015

Surplus notes

$

113.4

$

118.5

$

113.1

Investment agreements

Secured borrowing

Unfunded commitment fees 

0.2

3.9

2.4

0.6

5.2

—

0.9

2.5

—

Total interest expense

$

119.9

$

124.3

$

116.5

The decrease in interest expense for the year ended December 31, 
2017,  compared  to  2016  primarily  results  from  the  impact  of 
purchases of surplus notes during the first half of 2017 and reduced 
debt balances resulting from amortization of the secured borrowing 
notes outstanding.  The decrease in interest expense was partially 
offset  by  the  impact  of  applying  the  level  yield  method  as  the 
discount to the face value of the surplus note accretes over time. 
The year ended December 31, 2017 also includes commitment fees 
incurred for the Tier 2 Financing as part of the Rehabilitation Exit 
Transactions.  Refer  to  Note  1.  Background  and  Business 
Description  to  the  Consolidated  Financial  Statements  for 
information relating to the Rehabilitation Exit Transactions and 
Tier 2 Financing.

The increase in interest expense on surplus notes for the year ended 
December 31, 2016, compared to 2015 primarily results from the 
impact of applying the level yield method as the discount to the 
face value of surplus notes accretes over time. The  year ended 
December  31,  2016  also  includes  a  full  year  of  interest  on  the 
secured borrowing transaction of Ambac Assurance (issued in July 
2015). 

Surplus note principal and interest payments require the approval 
of  OCI.  Annually  from  2011  through  2017,  OCI  issued  its 
disapproval  of  the  requests  of  Ambac  Assurance  and  the 
Rehabilitator of the Segregated Account, acting for and on behalf 
of the Segregated Account, to pay interest on outstanding surplus 
notes issued by Ambac and the Segregated Account on the annual 
scheduled  interest  payment  date  of  June 7th.  Neither  Ambac 
Assurance nor the Rehabilitator of the Segregated Account, acting 
for and on behalf of the Segregated Account, have requested to pay 
interest  on  any  junior  surplus  notes  since  their  issuance.  The 
interest of the outstanding surplus notes and junior surplus notes 
were accrued for and Ambac is accruing interest on the interest 
amounts  following  each  scheduled  interest  payment  date.    In 
connection  with  the  consummation  of  the  Rehabilitation  Exit 
Transactions, Ambac Assurance received the approval of the OCI 
to make a one-time current interest payment of $13.5 million on 
surplus notes outstanding after the Rehabilitation Exit Transactions 
(other  than  junior  surplus  notes)  in  2018.    Refer  to  Note  1. 
Background  and  Business  Description  to  the  Consolidated 
Financial Statements for information relating to the Rehabilitation 
Exit Transactions

Total  accrued  and  unpaid  interest  for  surplus  notes  and  junior 
surplus notes outstanding to third parties were $345.3 million and 
$99.5 million, respectively, at December 31, 2017.  Principal and 
interest  payments  on  junior  surplus  notes,  which  became 
obligations of AAC on February 12, 2018, cannot be made until 
all Ambac Assurance surplus notes (other than other junior surplus 
notes)  are  paid  in  full  and  after  all  future  and  existing  senior 

| Ambac Financial Group, Inc.   55   2017 FORM 10-K |

indebtedness of AAC, policy and other priority claims against AAC 
have been paid in full. 

Provision for Income Taxes. The provision for income taxes for 
the  year  ended  December  31,  2017,  2016  and  2015  was  $44.5 
million, $30.7 million, and $17.4 million, respectively.  The income 
tax for all periods include a provision (benefit) for federal AMT 
taxes.  The  income  tax  for  the  year  ended  December 31,  2017 
reflects an estimated net discrete cost of $1.9 million resulting from 
the TCJA, further described in  Note 14. Income Taxes. The income 
tax for the year ended December 31, 2017 and 2016, includes a 
current  income  tax  provision  for  income  tax  due  in  respect  of 
Ambac  UK  of  $40.6  million,  and  $26.2  million,  respectively.  
Ambac UK fully utilized  operating losses brought forward from 
prior periods in the first quarter of 2016, resulting in income tax 
being payable.  

At  December 31,  2017  the  Company  had  $3.7  billion  of  U.S. 
Federal net ordinary operating loss carryforwards, including $1.4 
billion  at  Ambac  Financial  Group  and  $2.3  billion  at  Ambac 
Assurance.

LIQUIDITY AND CAPITAL RESOURCES

Ambac  Financial  Group,  Inc.  Liquidity. Ambac’s  liquidity  is 
dependent on its cash and liquid investments of $96.3 million as 
of December 31, 2017 and expense sharing and other arrangements 
with Ambac Assurance.  Ambac has an aggregated investment of 
$207.2 million in Ambac Assurance insured RMBS and surplus 
notes  issued  by Ambac Assurance  and  the  Segregated Account.  
These securities issued or insured by Ambac Assurance and the 
Segregated Account are generally less liquid than investment grade 
and other traded investments. Ambac's investments also include  
$64.7  million  of  combined  debt  and  equity  interests  in  Corolla 
Trust  (as  defined  in  the  Executive  Summary  section  of  this 
Management Discussion and Analysis).  

Pursuant to the amended and restated tax sharing agreement among 
Ambac, Ambac Assurance and certain affiliates (the “Amended 
required,  under  certain 
TSA"), 

  Ambac  Assurance 

is 

circumstances, to make payments ("tolling payments") to Ambac 
with respect to the utilization of net operating loss carry-forwards 
(“NOLs”). Ambac  received  $100.8  million  of  tolling  payments 
based on NOLs used by Ambac Assurance through December 31, 
2016,  and Ambac has accrued an additional tolling payment of 
$30.5 million that is expected to be paid to Ambac no later than 
forty-five days after April 15, 2018.  Additionally, under an inter-
company  cost  allocation  agreement,  Ambac  is  reimbursed  for 
certain operating costs and expenses. 

It is highly unlikely that Ambac Assurance will be able to make 
dividend  payments  to  Ambac  for  the  foreseeable  future  and 
therefore cash and investments, payments under the intercompany 
cost allocation agreement and future tolling payments, if any,  will 
be Ambac’s principal source of liquidity in the near term. Refer to 
Part  I,  Item 1,  “Insurance  Regulatory  Matters  -  Dividend 
Restrictions,  Including  Contractual  Restrictions”  and  Note  8. 
Insurance Regulatory Restrictions to the Consolidated Financial 
Statements included in Part II, Item 8, in this Form 10-K for more 
information on dividend payment restrictions. The principal use 
of liquidity is the payment of operating expenses, including costs 
to  explore  opportunities  to  grow  and  diversify Ambac,  and  the 
making of investments including securities issued or insured by 
Ambac Assurance.

Contingencies could cause material liquidity strains.

The  following  table  includes  aggregated  information  about 
contractual obligations for Ambac and its subsidiaries, excluding 
variable  interest  entities  consolidated  as  a  result  of  Ambac 
Assurance’s  financial  guarantee  contracts.  These  obligations 
include  payments  due  under  specified  contractual  obligations, 
aggregated  by  type  of  contractual  obligation,  including  claim 
payments,  principal  and 
interest  payments  under  Ambac 
Assurance’s  surplus  notes,  and  payments  due  under  operating 
leases.  The  table  and  commentary  below  reflect  scheduled 
payments  and  maturities  based  on  the  original  payment  terms 
specified in the underlying agreements and contracts, or expected 
required payment dates if earlier. 

($ in millions)
Surplus note obligations(1)
Operating lease obligations(2)
Purchase obligations(3)
Postretirement benefits(4)
Loss and loss expenses(5)

Income taxes

Total

Payments Due by Period

Total

Less Than 1 Year

1 - 3 Years

3 - 5 Years

More Than 5
Years

$

4,054.2

$

368.9

$

831.8

$

— $

2,853.5

29.3

23.8

4.2

8,025.6

—

6.8

21.4

0.3

4,196.2

—

7.5

2.4

0.6

386.7

—

3.2

—

0.8

207.8

—

$

12,137.1

$

4,593.6

$

1,229.0

$

211.8

$

11.8

—

2.5

3,234.9

—

6,102.7

(1) 

Includes principal of and interest on surplus notes (excluding junior surplus notes) on their scheduled maturity date. Also includes all principal and interest 
on junior surplus notes on the date all future and existing senior indebtedness of Ambac Assurance, policy and other priority claims against Ambac 
Assurance have been paid in full (included in the more than 5 years column). All payments of principal and interest on surplus notes are subject to the 
prior approval of the OCI. If the OCI does not approve the payment of interest on the surplus notes, such interest will accrue and compound annually until 
paid. Annually from 2011 through 2017, OCI disapproved scheduled interest payments. Amounts in the table assume future approval by OCI for surplus 
notes (excluding junior surplus notes) for all principal and interest payments, including payment of previously deferred interest totaling $314.4 on the 
next scheduled payment date of June 7, 2018. 

(2)  Amount represents future lease payments on lease agreements existing as of December 31, 2017. Ambac Assurance's lease with One State Street Plaza 
has a provision where Ambac Assurance can extend the lease of certain floors past the termination date of September 2019 to December 2029.  The above 
table does not reflect payments on those certain floors after the related lease expiry date of September 2019. 

| Ambac Financial Group, Inc.   56   2017 FORM 10-K |

(3)  Purchase obligations represent future expenditures for contractually scheduled fixed terms and amounts due for various technology-related maintenance 
agreements and other outside services. Includes $18.3 million of success fees to various advisors in connection with the Rehabilitation Exit Transactions.

(4)  Amount represents future payments relating to Ambac Assurance's postretirement medical reimbursement benefits for current retirees over the next 10 

years. 

(5)  The timing of expected claim payments is based on deal specific cash flows, excluding expected recoveries. These deal specific cash flows are based on 
the expected cash flows of the underlying transactions (e.g. for RMBS credits we model estimated future claim payments). The timing of expected claim 
payments for credits with reserves that were established using our statistical loss reserve method is determined based on the weighted average expected 
life of the exposure. Refer to the Loss Reserves section in Note 2. Basis of Presentation and Significant Accounting Policies to the Consolidated Financial 
Statements included in Part II, Item 8 in this Form 10-K for further discussion of our statistical loss reserve method. The timing of these payments may 
vary significantly from the amounts shown above, especially for credits that are based on our statistical loss reserve method.  Included in as an obligation 
due in less than 1 year, are obligations related to the Segregated Account's unpaid claims of $3,027.0 and interest accrued on Deferred Amounts of $839.7
as of December 31, 2017.  These obligations of the Segregated Account were subject to the Rehabilitation Exit Transactions, which were executed on 
February 12, 2018.  Refer to the Rehabilitation Exit Transactions section in Note 1. Background and Business Description to the Consolidated Financial 
Statements included in Part II, Item 8 in this Form 10-K for further discussion.

Ambac  Assurance  Liquidity.  Ambac  Assurance’s  liquidity  is 
dependent on the balance of liquid investments and, over time, the 
net impact of sources and uses of funds. The principal sources of 
Ambac Assurance’s liquidity are gross installment premiums on 
insurance and credit default swap contracts, principal and interest 
payments from investments, sales of investments, proceeds from 
repayment  of  affiliate  loans,  recoveries  on  claim  payments  and 
reinsurance  recoveries.  Termination  of  installment  premium 
policies  on  an  accelerated  basis  may  adversely  impact Ambac 
Assurance’s liquidity. The principal uses of Ambac Assurance’s 
liquidity  are 
the  payment  of  operating  expenses,  claim, 
commutation  and  related  expenses  payments  on  both  insurance 
and  credit  derivative  contracts,  ceded  reinsurance  premiums, 
surplus note principal and interest payments, if approved by OCI, 
additional loans to affiliates and tax payments to Ambac, including 
tolling  payments  due  under  the  Amended  TSA.  Interest  and 
principal payments on surplus notes are subject to the approval of 
OCI,  which  has  full  discretion  over  payments  regardless  of  the 
liquidity position of Ambac Assurance. 

Ambac  Assurance  manages  its  liquidity  risk  by  maintaining 
comprehensive analyses of projected cash flows and maintaining 
specified levels of cash and short-term investments at all times. 

Pursuant  to  the  injunctions  issued  by  the  Rehabilitation  Court, 
claims on policies allocated to the Segregated Account were not 
permitted to be paid during the Segregated Account Rehabilitation 
Proceedings until approved by the Rehabilitator. The Segregated 
Account was obliged to make Interim Payments of 45% of each 
permitted  policy  claim  to  be  paid  on  or  after  July  21,  2014  in 
accordance with the Segregated Account Rehabilitation Plan and 
associated rules and guidelines.

In addition, the Rehabilitator sought and received approval from 
the  Rehabilitation  Court  to  make  Supplemental  Payments  (i.e., 
cash  payments  in  excess  of  45%  of  the  permitted  policy  claim 
amount with respect to certain policies so that cash flow in the 
related  securitization  trusts  that  would  have  been  available  to 
reimburse Ambac Assurance had it paid claims in full under such 
policies is not diverted to uninsured holders who would not have 
received such cash flow if claims had been paid in full) and Special 
Policy  Payments  (i.e.,  claims  payments  in  excess  of  the  then 
applicable claims cash payment percentage, and/or payments of 
all or portions of unpaid permitted policy claims with settlement 
proceeds from RMBS remediation claims) with respect to certain 
insured securities. During the years ended December 31, 2017 and 
2016, the Segregated Account made, in aggregate, Supplemental 

Payments  and  Special  Policy  Payments  in  respect  of  permitted 
policy claims of $47.6 million and $84.3 million, respectively.

from 

On  February  12,  2018,  Ambac  and  Ambac  Assurance 
consummated  the  Rehabilitation  Exit  Transactions.    The  cash 
the  Rehabilitation  Exit  Transactions  was 
outflow 
approximately $1.4 billion.  See Note 1. Background and Business 
Description to the Consolidated Financial Statements included in 
Part  II,  Item 8  in  this  Form  10-K  for  details  regarding  the 
Rehabilitation Exit Transactions. 

Ambac Assurance is limited in its ability to pay dividends to Ambac 
pursuant to the terms of the Settlement Agreement, the Stipulation 
and Order and its Auction Market Preferred Shares (“AMPS”).

•  Pursuant  to  the  Settlement  Agreement,  Ambac  Assurance 
may  not  make  any  “Restricted  Payment”  (which  includes 
dividends from Ambac Assurance to Ambac) in excess of $5 
million  in  the  aggregate  per  annum,  other  than  Restricted 
Payments from Ambac Assurance to Ambac in an amount up 
to $7.5 million per annum solely to pay operating expenses 
of  Ambac.  Concurrent  with  making  any  such  Restricted 
Payment, a pro rata amount of surplus notes (other than junior 
surplus notes) would also need to be redeemed at par. 

•  The  Stipulation  and  Order  requires  OCI  approval  for  the 
payment of any dividend or distribution on the common stock 
of Ambac Assurance.

The terms of the AMPS state that dividends may not be paid on 
the  common  stock  of Ambac Assurance  unless  all  accrued  and 
unpaid dividends on the AMPS for the then current dividend period 
have been paid, provided that dividends on the common stock may 
be made at all times for the purpose of, and only in such amounts 
as are necessary for enabling Ambac (i) to service its indebtedness 
for borrowed money as such payments become due or (ii) to pay 
its operating expenses. If dividends are paid on the common stock 
for  such  purposes,  dividends  on  the AMPS  become  cumulative 
until the date that all accumulated and unpaid dividends have been 
paid on the AMPS. Ambac Assurance has not paid dividends on 
the  AMPS  since  2010.    Refer  to  Part  I,  Item 1,  “Insurance 
Regulatory Matters - Dividend Restrictions, Including Contractual 
Restrictions” and Note 8. Insurance Regulatory Restrictions to the 
Consolidated Financial Statements included in Part II, Item 8 in 
this10-K for more information on dividend payment restrictions. 

| Ambac Financial Group, Inc.   57   2017 FORM 10-K |

During  the  year  ended  December  31,  2017  and  2016, Ambac 
Assurance  received  total  subrogation  of  $244.0  million  and 
$1,355.4 million, respectively, net of reinsurance, primarily related 
to RMBS.  

•  The year ended December 31, 2017 includes $49.7 million 
($49.8 million gross of reinsurance) of subrogation recoveries 
related  to  a  reimbursement  of  claims  due  to  a  mortgage 
insurance settlement. 

Cash  Flow  Statement  Discussion. 
summarizes the net cash flows for the periods presented.

  The  following  table 

($ in million)
Year Ended December 31,

Cash provided by (used in):

2017

2016

2015

Operating activities

Investing activities

Financing activities

$

(212.8) $

843.5

$

91.8

928.8

(182.1)

(714.6)

(69.7)

(175.7)

46.9

•  The  year  ended  December  31,  2016 

the 
representation and warranty receipt from JP Morgan of $992.8 
million  ($995.0  million  gross  of  reinsurance)  and  $99.1 
million ($100.3 million gross of reinsurance) of subrogation 
recoveries related to the Countrywide Investor Settlement.

includes 

Our  ability  to  realize  representation  and  warranty  subrogation 
recoveries  is  subject  to  significant  uncertainty,  including  risks 
inherent  in  litigation,  collectability  of  such  amounts  from 
counterparties  (and/or  their  respective  parents  and  affiliates), 
timing of receipt of any such recoveries, intervention by the OCI 
which could impede our ability to take actions required to realize 
such recoveries and uncertainty inherent in the assumptions used 
in estimating such recoveries. The amount of these subrogation 
recoveries  is  significant  and  if  we  are  unable  to  recover  any 
amounts,  our  future  available  liquidity  to  pay  claims  would  be 
reduced materially.

Ambac  Financial  Services  ("AFS")  Liquidity.  AFS  provided 
interest rate swaps to states, municipalities and their authorities, 
asset-backed  issuers  and  other  entities  in  connection  with  their 
financings.  Additionally, AFS uses interest rate derivatives as an 
economic  hedge  against  the  effects  of  rising  interest  rates 
elsewhere in the Company, including on the financial guarantee 
and investment portfolios. The principal uses of liquidity by AFS 
are payments on intercompany loans, payments under derivative 
contracts (primarily interest rate swaps and US Treasury futures), 
collateral posting and operating expenses.  Liquidity risk exists in 
the derivative  portfolios due to contract provisions which may 
require collateral posting, daily settlements or early termination of 
contracts. AFS borrows cash and securities from Ambac Assurance 
to meet liquidity needs when such borrowing is determined to be 
most economically beneficial to Ambac Assurance. Intercompany 
loans are made under established lending agreements with defined 
borrowing limits that have received non-disapproval from OCI.

In June 2017, AFS received a $94.4 million capital contribution 
from Ambac Assurance that was used to commute the majority of 
its remaining interest rate swaps with financial guarantee customer 
counterparties effective June 27, 2017. This swap commutation 
reduced, but does not eliminate, AFS's liquidity risk from potential 
early terminations of uncollateralized derivatives.  Management 
believes  that AFS’  short  and  long-term  liquidity  needs  can  be 
funded  from  intercompany  loans  from  Ambac  Assurance  and 
receipts from derivative contracts.  

Effect of foreign exchange

on cash and cash
equivalents

Net cash flow

Operating activities

$

$

(1.2) $

(3.9) $

(1.1)

532.7

$

55.3

$

(38.2)

The following represents the significant cash activities during the 
years ended December 31, 2017, 2016 and 2015 :

•  During  the  year  ended  December 31,  2017, Ambac  made 
payments  of  $94.4  million  to  commute  interest  rate  swaps 
with a special purpose entity, Augusta Funding Limited IV;

•  During  the  year  ended  December 31,  2017, Ambac  made 
payments of $104.7 million to extinguish (on a consolidated 
basis)  principal  and  interest  of  surplus  notes  of  Ambac 
Assurance and the Segregated Account of Ambac Assurance 
and settled certain residual obligations related to previously 
called surplus notes ($69.5 million principal and $35.2 million 
interest).  The interest amount reduces operating cash flows 
and the principal reduced financing cash flows; and 

•  During the years ended December 31, 2017, 2016 and 2015, 
Ambac had net loss and loss expenses paid (recovered) of 
$134.3  million,  $(939.6)  million  and  $1.1  million, 
respectively.  Included in the recoveries for the year ended 
December 31, 2017 were the subrogation recoveries related 
to a mortgage insurance settlement of  $49.7 million ($49.8 
million gross of reinsurance). Included in the recoveries for 
the year ended December 31, 2016 were the representation 
and warranty receipt from JP Morgan of $992.8 million and 
$99.1  million  of  subrogation  recoveries  related  to  the 
Countrywide  Investor  Settlement.    Excluding  subrogation 
receipts, loss and loss expenses paid, including commutation 
payments, were $378.3 million, $415.8 million, and $398.3 
million  for  the  years  ended  December  31,  2017,  2016  and 
2015, respectively.  Losses paid on Puerto Rico polices were 
$142.5 million, $63.3 million and $0.0 million for the years 
ended December 31, 2017, 2016 and 2015, respectively. 

•  During  the  year  ended  December  31,  2017  and  2016  tax 
payments  amounted  to  $40.3  million  and  $21  million, 
respectively.

Future operating cash flows will primarily be impacted by the level 
of premium collections, investment coupon receipts and claim or 
commutation payments. 

| Ambac Financial Group, Inc.   58   2017 FORM 10-K |

Financing Activities

Financing  activities  for  the  year  ended  December  31,  2017 
included  paydowns  on  a  secured  borrowing  of  $29.0  million, 
payments for investment agreements of $82.4 million, payments 
for extinguishment of surplus notes of $69.5 million; compared to 
repayments of secured borrowing of $29.5 million, payment for 
investment  agreements  of  $18.0  million,  payments  for  the 
extinguishment  of  surplus  notes  of  $19.6  million  and  the 
acquisition of Ambac warrants of $2.7 million  for the year ended 
December 31, 2016.

Financing  activities  for  the  year  ended  December  31,  2015 
included proceeds of $129.9 million (net of repayments during the 
year  ended  December  31,  2015)  received  from  a  secured 
borrowing, partially offset by payments for investment agreements 
of $63.9 million, payments for extinguishment of surplus notes of 
$13.8  million  and  the  acquisition  of  Ambac  warrants  of  $5.0 
million.

Principal and interest due on the debt issued in connection with 
the Rehabilitation Exit Transactions as well as future payments on 
the remaining surplus notes will impact Ambac's future cash flows.

Collateral

AFS provides interest rate swaps for states, municipalities, asset-
backed  issuers  and  other  entities  in  connection  with  their 
financings. AFS hedges interest rate risk of these instruments, as 
well as a portion of the interest rate risk in the financial guarantee 
portfolio,  with  standardized  derivative  contracts,  including 
financial  futures  contracts,  which  contain  collateral  or  margin 
requirements. Under these hedge agreements, AFS is required to 
post  collateral  or  margin  to  its  counterparties  and  futures 
commission merchants to cover unrealized losses. In addition, AFS 
is required to post collateral or margin in excess of the amounts 
needed to cover unrealized losses. All AFS derivative contracts 
containing ratings-based downgrade triggers that could result in 
collateral or margin posting or a termination have been triggered. 
If  terminations  were  to  occur, AFS  would  be  required  to  make 
termination payments but would also receive a return of collateral 
or margin in the form of cash, U.S. Treasury or U.S. government 
agency  obligations  with  market  values  equal  to  or  in  excess  of 
market values of the swaps and futures contracts. In most cases, 
AFS will look to re-establish hedge positions that are terminated 
early. This may result in additional collateral or margin obligations. 
The amount of additional collateral or margin posted on derivatives 
contracts will depend on several variables including the degree to 
which  counterparties  exercise  their  termination  rights  (or 
agreements  terminate  automatically)  and  the  terms  on  which 
hedges can be replaced. All collateral and margin obligations are 
currently met. Collateral and margin posted by AFS totaled a net 
amount of $120.6 million (cash and securities collateral of $20.9 
million  and  $99.7  million,  respectively),  including  independent 
amounts, under these contracts at December 31, 2017. 

Ambac Credit Products (“ACP”) is not required to post collateral 
under any of its outstanding derivative contracts.

BALANCE SHEET

Total  assets  increased  by  approximately  $557  million  from 
December 31,  2016  to  $23.2  billion  at  December 31,  2017, 
primarily due to higher variable interest entity assets as a result of 

lower  credit  spreads  and  strengthening  of  the  British  Pound 
Sterling  receivable  for  securities,  partially  offset  by  (i) 
consideration paid for Ambac's extinguishment of all Segregated 
Account surplus notes and a portion of Ambac Assurance surplus 
notes (cash and investments); (ii)  amortization of the insurance 
intangible asset during the period, (iii) payment of $94 million in 
connection  with  interest  rate  swap  commutations,    (iv)  lower 
premium  receivables,  and  (v)  application  of  $71  million  of 
collateral receivable included in other assets as of December 31, 
2016 as a reduction to derivative liabilities under new rules by our 
central  clearing  party  effective  January  3,  2017  governing  the 
character  of  variation  margin.    Under  the  new  rules,  variation 
margin  payments  are  considered  settlements  of  the  associated 
derivative balance and accordingly were removed from other assets 
and recoded as a reduction to derivative liabilities.  Refer to Note 
11. Derivative Instruments in this Form 10-K located in Part II. 
Item 8 for further information on the rule change.

Total  liabilities  increased  by  approximately  $889  million  from 
December 31,  2016  to  $21.5  billion  as  of  December 31,  2017, 
primarily as a result of (i) higher variable interest entity liabilities 
as a result of lower credit spreads and strengthening of the British 
Pound Sterling, (ii) higher loss and loss expense reserves and (iii) 
higher  deferred  tax  liabilities  relating  to  Ambac's  foreign 
subsidiaries as a result of the Tax Cuts and Jobs Act enacted in 
December  2017,  partially  offset  by  (i)  the  maturity  of  the  last 
remaining  investment  agreement,  (ii)  reductions  to  derivative 
liabilities of $145 million related to terminated interest rate swaps 
and $71 million associated with the characterization of variation 
margin as noted above, (iv) reductions to long-term debt as a result 
of  the  extinguishment  of  surplus  notes  and  (v)  lower  unearned 
premium revenue.

As of December 31, 2017 total stockholders’ equity was $1,645 
million, compared with total stockholders’ equity of $1,978 million
at December 31, 2016. This decrease was primarily driven by Total 
Comprehensive Loss during the period.  Total Comprehensive Loss 
during  2017  was  driven  by  a  net  loss  during  the  period  and 
unrealized  losses  on  investment  securities,  partially  offset  by 
translation gains related to Ambac's foreign subsidiaries. 

As  further  discussed  in    Note  1.  Background  and  Business 
Description and Note 17. Subsequent Events of the Consolidated 
Financial  Statements  in  Part  II,  Item 8  of  this  Form  10-K,  on 
February 12, 2018, the Second Amended Plan of Rehabilitation 
became  effective  and  the  Rehabilitation  Exit Transactions  were 
consummated.  The  Rehabilitation  Exit  Transactions  involved  a 
series of transactions which provided holders of beneficial interests 
in  Deferred Amounts  (other  than Ambac,  but  including Ambac 
Assurance)  a  total  effective  consideration  package,  in  full 
satisfaction  and  discharge  of  each  $1.00  of  Deferred Amounts 
(including accretion), of (i) $0.40  in cash, (ii) $0.41 in principal 
amount  of  new  Secured  Notes  and  (iii) from  certain  holders  of 
surplus notes,  $0.125  currently outstanding surplus notes.  Such 
consideration package thereby provided a discount of $0.065 (set 
first  against  accretion  of  Deferred  Amounts).  Ambac  received  
$0.91  in  principal  amount  of  Secured  Notes  for  each  $1.00  of 
Deferred Amounts (including accretion) that it held, and provided 
a $0.09 discount in full satisfaction and discharge of its Deferred 
Amount claims.  Additionally, the Rehabilitation Exit Transactions 
also  involved  a  series  of  interrelated  transactions  involving  the 
exchange  of  certain  surplus  notes  (collectively,  the  “Exchange 

| Ambac Financial Group, Inc.   59   2017 FORM 10-K |

Offers”), pursuant to which, for each  $1.00 of principal amount 
outstanding  and  accrued  and  unpaid  interest  thereon,  holders 
effectively  (i)  received  $0.40    in  cash,  (ii)  received  $0.41  in 
principal  amount  of  Secured  Notes,  (iii) retained  $0.125  in 
principal  amount  and  accrued  and  unpaid  interest  thereon  of 
surplus notes and (iv) provided a discount of  $0.065 in principal 
amount and accrued and unpaid interest thereon. Ambac did not 
participate in the Exchange Offers. See below "Pro Forma Balance 
Sheet and Pro Forma Adjusted Book Value" in this Management 
Discussion and Analysis for a depiction of the transactions on the 
Consolidated  Balance  Sheet  as  if  the  Rehabilitation  Exit 
Transactions  were  consummated  on  December  31,  2017.  This 
transaction will have a significant impact on the comparability of 
Ambac's financial results between 2018 and prior years.

Investment  Portfolio. Ambac Assurance’s  and  Everspan's  non-
VIE investment objective is to achieve the highest risk-adjusted 
after-tax return on a diversified portfolio of primarily fixed income 
investments while employing asset/liability management practices 
to  satisfy  operating  and  strategic  liquidity  needs.  Ambac 
Assurance’s investment portfolio is subject to internal investment 
guidelines  and  is  subject  to  limits  on  types  and  quality  of 
investments imposed by the insurance laws and regulations of the 
jurisdictions  in  which  it  is  licensed,  primarily  the  States  of 
Wisconsin  and  New York.  Such  guidelines  set  forth  minimum 
credit  rating  requirements  and  credit  risk  concentration  limits. 
Within  these  guidelines,  which  in  certain  instances  may  be 
exceeded with the approval of the applicable regulatory authority, 
Ambac Assurance opportunistically purchases Ambac Assurance 
insured securities given their relative risk/reward characteristics. 
Ambac Assurance’s investment policies are subject to oversight 
by OCI pursuant to the Settlement Agreement and the Stipulation 
and Order. The Board of Directors of Ambac Assurance approves 
any changes to Ambac Assurance's investment policy.

Ambac  UK’s  non-VIE  investment  policy  is  designed  with  the 
primary objective of ensuring that Ambac UK is able to meet its 
financial obligations as they fall due, in particular with respect to 
policyholder  claims.  Ambac  UK’s  investment  portfolio  is 
primarily  fixed  income  investments  and  diversified  holdings  of 
pooled  investment  funds.  The  portfolio  is  subject  to  internal 
investment guidelines and may be subject to limits on types and 
quality of investments imposed by the PRA as regulator of Ambac 
UK. Ambac  UK’s  investment  policy  sets  forth  minimum  credit 
rating  requirements  and  concentration  limits,  among  other 
restrictions. The Board of Directors of Ambac UK approves any 
changes or exceptions to Ambac UK’s investment policy.

Ambac  Financial  Group,  Inc.'s  non-VIE  investment  portfolio's 
primary  objective  is  to  preserve  capital  for  strategic  uses  while 
maximizing income, including investments in securities issued by 
or guaranteed by Ambac Assurance.

Refer to Note 10. Investments in this Form 10-K in this Form 10-
K  located  in  Part  II.  Item  8  for  information  about  Ambac's 
consolidated non-VIE investment portfolio.  

The  following  table  summarizes  the  composition  of  Ambac’s 
investment portfolio, excluding VIE investments, at carrying value 
at December 31, 2017 and 2016:

($ in millions)
December 31,

Fixed income securities

Short-term

Other investments

Fixed income securities pledged

as collateral
Total investments (1)

2017

2016

4,652.2

$

5,554.2

557.3

431.6

99.7

5,740.8

$

$

430.8

450.3

64.9

6,500.2

$

$

$

(1) 

Includes investments denominated in non-US dollar currencies with 
a fair value of £209.8 ($283.6) and €40.9 ($49.1) as of December 31, 
2017 and £167.8 ($206.7) and €23.5 ($24.7) as of December 31, 2016.

Ambac invests in various asset classes in its fixed income securities 
portfolio,  including  securities  covered  by  guarantees  issued  by 
Ambac  Assurance  and  other  financial  guarantors  ("insured 
securities").  Refer to Note 10. Investments in this 10-K located in 
Part II. Item 8 for information about insured securities by guarantor 
and asset class.  The following table represents the fair value of 
mortgage and asset-backed securities at December 31, 2017 and 
2016 by classification:

($ in millions)
December 31,

Residential mortgage-backed

securities:

2017

2016

RMBS—First-lien—Alt-A

$

1,029.4

$

1,044.3

RMBS—Second Lien

RMBS—First Lien—Sub Prime

Total residential mortgage-backed

securities

Other asset-backed securities

839.9

382.0

910.4

396.9

2,251.3

2,351.6

Military Housing

Student Loans

Structured Insurance

Credit Cards

Auto

Other

Total other asset-backed securities

243.4

152.1

137.6

33.0

31.6

0.2

597.9

236.6

151.4

118.8

164.1

137.8

20.1

828.8

Total (1)

$

2,849.2

$

3,180.4

(1) 

Includes investments guaranteed by Ambac Assurance and Ambac 
UK for both years presented.  Refer to Note 10. Investments in this 
10-K located in Part II. Item 8 for further details of Ambac-insured 
securities held in the investment portfolio.

The  weighted  average  rating,  which  is  based  on  the  lower  of 
Standard & Poor’s or Moody’s ratings, of the mortgage and asset-
backed securities is C and CCC as of December 31, 2017, and CC 
and BB- as of December 31, 2016, respectively.

The following tables provide the ratings(1) distribution of the fixed 
income investment portfolio based on fair value at December 31, 
2017 and 2016.

| Ambac Financial Group, Inc.   60   2017 FORM 10-K |

_______________________________________
(1)  Ratings are based on the lower of Moody’s or S&P ratings. If ratings are unavailable from Moody's or S&P, Fitch ratings are used.  If guaranteed, rating 

represents the higher of the underlying or guarantor’s financial strength rating.  

(2)  Below investment grade and not rated bonds insured by Ambac represent 64% and 45% of the 2017 and 2016 combined portfolio, respectively. The 
increase in the percentage of not rated and below investment grade holdings since December 31, 2016 is driven by additional purchases of Ambac insured 
bonds.

Premium Receivables. Ambac either received premium upfront at 
time of issuance of the insurance policy or in installments over the 
policy  term.    For  installment  premium  transactions,  a  premium 
receivable asset is established equal to the (i) present value of future 
contractual  premiums  due  or  (ii)  if  the  underlying  insured 
obligation is a homogenous pool of assets which are contractually 
prepayable, the present value of premiums to be collected over the 
expected  life  of  the  transaction.   Ambac's  premium  receivables 
decreased to $586 million at December 31, 2017 from $661 million 
at  December 31, 2016.  As further discussed in Note 7. Financial 
Guarantee Insurance Contracts, the decrease is due to premium 
receipts,  including  the  termination  premium  of  £12.6  million 
received  in  2017,  and  adjustments  for  changes  in  expected  and 
contractual cash flows, partially offset by the impact of currency 
exchange  rates  on  non-US  denominated  future  premiums  and 
accretion of premium receivable discount. 

Premium receivables by payment currency were as follows:

Currency
(Amounts in millions)

U.S. Dollars

British Pounds

Euros

Australian Dollars

Total

Premium
Receivable in
Payment
Currency

Premium
Receivable in
U.S. dollars

$

£

€

A$

397.6

$

112.3

30.0

1.0

$

397.6

151.9

36.0

0.8

586.3

Insurance Intangible Asset.  At the Fresh Start Reporting Date, 
an insurance intangible asset was recorded which represented the 
difference between the fair value and aggregate carrying value of 
the  financial  guarantee  insurance  and  reinsurance  assets  and 
liabilities. For the year ended December 31, 2017 and 2016, the 

insurance intangible amortization expense was $151 million and 
$175 million, respectively.  As of December 31, 2017 and 2016, 
the  gross  carrying  value  of  the  insurance  intangible  asset  was 
$1,581 million and $1,534 million, respectively.  The increase in 
gross  carrying  value  at  December 31,  2017  from  December 31, 
2016  is  solely  impacted  by  translation  gains  (losses)  from  the 
consolidation  of  Ambac's  foreign  subsidiary  (Ambac  UK).  
Accumulated amortization of the insurance intangible asset was 
$734 million and $572 million, as of December 31, 2017 and 2016, 
respectively, resulting in a net insurance intangible asset of $847 
million and $962 million, respectively. 

Derivative  Liabilities.  The  interest  rate  derivative  portfolio  is 
positioned to benefit from rising rates as an economic hedge against 
interest rate exposure in the financial guarantee and investment 
portfolio.    Derivative  liabilities  decreased  from  $319  million  at 
December 31, 2016 to $83 million as of December 31, 2017. The 
decrease results primarily from the commutation of certain interest 
rate swaps with a liability fair value of $145 million at December 
31, 2016, continued runoff of the credit derivative portfolio and 
the  characterization  of  variation  payments  on  centrally  cleared 
derivatives  as  settlements  of  the  associated  derivative  balances 
resulting  from  central  clearing  party  rule  changes  that  were 
effective  January  3,  2017.    The  amount  of  variation  margin 
included within "Other assets" on the Consolidated Balance Sheet 
as of December 31, 2016 that was reclassified as a reduction to 
derivative liabilities under the new CCP rules effective January 3, 
2017 was $71 million.  The valuation of derivative liabilities (credit 
derivatives and interest rate swaps) is impacted by the market’s 
view  of Ambac Assurance’s  credit  quality.  We  reflect Ambac’s 
credit quality in the fair value of such liabilities by including a 
CVA in the determination of fair value, whereas a lower (higher) 
CVA, in isolation, would result in an increase (decrease) in the 
liability. Ambac reduced its derivative liabilities by $0.1 million

| Ambac Financial Group, Inc.   61   2017 FORM 10-K |

 
at December 31, 2017 and $46.9 million at December 31, 2016 to 
incorporate the market’s view of Ambac’s credit quality. The lower 
CVA as of December 31, 2017 is a function of the lower gross value 
of  the  associated  derivative  liabilities  relative  to  December  31, 
2016, primarily driven by the above referenced interest rate swaps 
commutation.

Loss and Loss Expense Reserves and Subrogation Recoverable. 
Loss and loss expense reserves are based upon estimates of the 
ultimate aggregate losses inherent in the non-derivative portfolio 

issued 

to  beneficiaries, 

insurance  policies 

for 
including 
unconsolidated VIEs.  Loss and loss expense reserves include the 
unpaid  portion  of  interest  accrued  on  Deferred  Amounts 
established  pursuant  to  the  Segregated  Account  Rehabilitation 
Plan, which were discharged on February 12, 2018. The loss and 
loss expense reserves net of subrogation recoverables and before 
reinsurance as of December 31, 2017 and 2016 were $4,114 million 
and $3,696 million, respectively.  Loss and loss expense reserves 
are included in the Consolidated Balance Sheets as follows:

($ in millions)
Balance Sheet Line Item

December 31, 2017:

Loss and loss expense reserves

Subrogation recoverable

Totals

December 31, 2016:

Loss and loss expense reserves

Subrogation recoverable

Totals

Unpaid Claims

Claims

Accrued
Interest

Present Value of Expected
Net Cash Flows

Claims and
Loss
Expenses

Recoveries (1)

Unearned
Premium
Revenue

Gross Loss
and Loss
Expense
Reserves (2)

$

$

$

$

2,412

615

3,027

2,411

583

2,994

$

$

$

$

668

172

840

530

132

662

$

$

$

$

2,855

102

2,957

2,681

68

2,749

$

$

$

$

(1,054) $

(136) $

(1,520)

—

(2,574) $

(136) $

(1,098) $

(143) $

(1,468)

—

(2,566) $

(143) $

4,745

(631)

4,114

4,381

(685)

3,696

(1) 

(2) 

Includes the present value of future recoveries include R&W subrogation recoveries of $1,834 and $1,907 at December 31, 2017 and 2016, respectively. 

Includes Euro denominated gross loss and loss expense reserves.  US dollar equivalents of such reserves were $21 (€18) and $21 (€20) at December 31, 
2017 and 2016, respectively.

The  evaluation  process  for  determining  the  level  of  reserves  is 
subject  to  certain  estimates  and  judgments.  Please  refer  to  the 
"Critical  Accounting  Policies  and  Estimates"  and  “Results  of 
Operations”  sections  of  this  Management’s  Discussion  and 
Analysis  of  Financial  Condition  and  Results  of  Operations  in 
addition  to  Basis  of  Presentation  and  Significant  Accounting 
Policies and Loss Reserves sections included in Note 2. Basis of 
Presentation  and  Significant  Accounting  Policies  and  Note  7. 
Financial  Guarantee  Insurance  Contracts,  respectively  of  the 
Consolidated Financial Statements included in Part II, Item 8 in 
this Form 10-K for further information on loss and loss expenses. 

Ambac has exposure to various bond types issued in the debt capital 
markets. Our experience has shown that, for the majority of bond 

types, we have not experienced significant claims. The bond types 
that  have  experienced  significant  claims,  including  through 
commutations,  are 
residential  mortgage-backed  securities 
(“RMBS”)  and  student  loan  securities.  These  two  bond  types 
represent 87% of our ever-to-date insurance claims recorded with 
RMBS comprising 82%.  Although historically RMBS and student 
loan securities have been the largest source of claim activity there 
are reserves on Public Finance and Ambac UK credits that may 
result in significant claim payments in the future. 

The  table  below  indicates  gross  par  outstanding  and  the 
components  of  gross  loss  and  loss  expense  reserves  related  to 
policies  in  Ambac’s  gross  loss  and  loss  expense  reserves  at 
December 31, 2017 and 2016: 

| Ambac Financial Group, Inc.   62   2017 FORM 10-K |

Unpaid Claims

Gross Par
Outstanding (1)(2)

Claims

Accrued
Interest

Present Value of Expected
Net Cash Flows

Claims and
Loss
Expenses

Recoveries

Unearned
Premium
Revenue

Gross Loss
and Loss
Expense 
Reserves (1)(3)

$

$

$

5,243

$

3,014

$

837

$

888

$

(2,120) $

(21) $

2,598

4,265

701

941

537

—

13

—

—

—

—

3

—

—

—

—

1,278

361

315

26

89

(403)

(40)

(11)

—

—

(75)

(13)

(18)

(9)

—

816

308

286

17

89

11,687

$

3,027

$

840

$

2,957

$

(2,574) $

(136) $

4,114

6,756

$

2,982

$

660

$

1,073

$

(2,295) $

(26) $

2,394

4,410

728

939

567

—

12

—

—

—

—

2

—

—

—

—

822

337

416

26

75

(216)

(45)

(10)

—

—

(73)

(13)

(18)

(13)

—

547

279

388

13

75

$

13,400

$

2,994

$

662

$

2,749

$

(2,566) $

(143) $

3,696

($ in millions)

December 31, 2017:

RMBS

Domestic Public Finance

Student Loans

Ambac UK

All other credits

Loss expenses

Totals

December 31, 2016:

RMBS

Domestic Public Finance

Student Loans
Ambac UK (4)

All other credits

Loss expenses

Totals

(1)  Ceded par outstanding on policies with loss reserves and ceded loss and loss expense reserves are $590 and $41, respectively, at December 31, 2017 and 
$607 and $31, respectively at December 31, 2016. Ceded loss and loss expense reserves are included in Reinsurance recoverable on paid and unpaid 
losses. 

(2)  Gross Par Outstanding includes capital appreciation bonds, which are reported at the par amount at the time of issuance of the insurance policy as opposed 

to the current accreted value of the bond.

(3)  Loss reserves are included in the balance sheet as Loss and loss expense reserves or Subrogation recoverable dependent on if a policy is in a net liability 

or net recoverable position. 

(4)   Present value of Expected Net Cash Flows is reduced by estimated recoveries from the Ambac UK v. J.P. Morgan Investment Management litigation, 
which was settled in 2017.  Please refer to Note 7. Financial Guarantee Insurance Contracts of the Consolidated Financial Statements in 
Part II, Item 8 of this Form 10-K for additional information relating to this settlement.

RMBS

Ambac  has  exposure  to  the  U.S.  mortgage  market  primarily 
including 
through  direct  financial  guarantees  of  RMBS, 
transactions collateralized by first and second liens. 

We established a representation and warranty subrogation recovery 
as  further  discussed  in  "Critical  Accounting  Policies  and 
Estimates" section of this Management’s Discussion and Analysis 
of Financial Condition and Results of Operations in addition to the 
Basis of Presentation and Significant Accounting Policies and Loss 
Reserves sections included in Note 2. Basis of Presentation and 
Significant Accounting Policies and Note 7. Financial Guarantee 
Insurance Contracts, respectively, of the Consolidated Financial 
Statements  included  in  Part  II,  Item 8  in  this  Form 10-K.    Our 
ability to realize RMBS representation and warranty recoveries is 
subject  to  significant  uncertainty,  including  risks  inherent  in 

litigation, collectability of such amounts from counterparties (and/
or their respective parents and affiliates), timing of receipt of any 
such recoveries, intervention by the OCI which could impede our 
ability  to  take  actions  required  to  realize  such  recoveries,  and 
uncertainty inherent in the assumptions used in estimating such 
recoveries.

The table below distinguishes between RMBS credits for which 
we have not established a representation and warranty subrogation 
recovery and those for which we have, providing in both cases the 
gross  par  outstanding,  gross  loss  reserves  before  representation 
and warranty subrogation recoveries, and gross loss reserves net 
of  representation  and  warranty  subrogation  recoveries  for  all 
RMBS  exposures  for  which  Ambac  established  reserves  at 
December 31, 2017 and 2016:

| Ambac Financial Group, Inc.   63   2017 FORM 10-K |

($ in millions)

December 31, 2017:

Second-lien

First-lien Mid-prime

First-lien Sub-prime

Other

Total Credits Without Subrogation

Second-lien

First-lien Mid-prime

First-lien Sub-prime

Total Credits With Subrogation

Total

December 31, 2016:

Second-lien

First-lien-Mid-prime

First-lien-Sub-prime

Other

Total Credits Without Subrogation

Second-lien

First-lien Mid-prime

First-lien Sub-prime

Total Credits With Subrogation

Total

Public Finance

Gross Loss
Reserves Before
Representation
and Warranty
Subrogation
Recoveries

Representation
and Warranty
Subrogation
Recoveries

Gross Loss
Reserves Net of
Representation
and Warranty
Subrogation
Recoveries

Gross Par
Outstanding

$

1,065

$

735

$

— $

1,849

667

137

3,718

735

59

731

1,997

190

144

3,066

719

104

543

1,525

5,243

$

1,366

4,432

$

—

—

—

—

(1,272)

(79)

(483)

(1,834)

(1,834) $

1,169

$

679

$

— $

$

$

2,226

1,194

201

4,790

1,045

72

849

1,966

$

6,756

$

1,901

231

138

2,949

705

97

550

1,352

4,301

$

—

—

—

—

(1,333)

(79)

(495)

(1,907)

(1,907) $

735

1,997

190

144

3,066

(553)

25

60

(468)

2,598

679

1,901

231

138

2,949

(628)

18

55

(555)

2,394

Ambac’s U.S. public finance portfolio consists predominantly of 
municipal bonds such as general and revenue obligations and lease 
and tax-backed obligations of state and local government entities; 
however,  the  portfolio  also  comprises  a  wide  array  of  non-
municipal types of bonds, including financings for not-for-profit 
entities and transactions with public and private elements, which 

generally finance infrastructure, housing and other public purpose 
facilities and interests.  The increase in public finance gross loss 
reserves at December 31, 2017 as compared to December 31, 2016
was primarily related to adverse developments in Puerto Rico and 
military  housing.    Total  public  finance  gross  loss  reserves  and 
related  gross  par  outstanding  on Ambac  insured  obligations  by 
bond type were as follows:

($ in millions)
Issuer Type
December 31,

Lease and tax-backed

General obligation

Transportation revenue

Housing

Other

Total

2017

2016

Gross Par
Outstanding (1)

Gross Loss
Reserves

Gross Par
Outstanding (1)

Gross Loss
Reserves

$

$

2,201

$

1,053

495

449

67

650

$

60

64

31

11

2,114

$

1,422

516

179

179

4,265

$

816

$

4,410

$

395

78

62

9

3

547

(1) Gross Par Outstanding includes capital appreciation bonds, which are reported at the par amount at the time of issuance of the insurance policy as opposed 

to the current accreted value of the bond.

SPECIAL PURPOSE AND VARIABLE INTEREST 
ENTITIES

information  regarding  special  purpose  and  variable  interest 
entities. 

Please  refer  to  Note  2.  Basis  of  Presentation  and  Significant 
Accounting  Policies  and  Note  3.  Special  Purpose  Entities, 
Including Variable Interest Entities to the Consolidated Financial 
Statements,  included  in  Part  II,  Item 8  in  this  Form  10-K,  for 

ACCOUNTING STANDARDS

Please  refer  to  Note  2.  Basis  of  Presentation  and  Significant 
Accounting  Policies  to  the  Consolidated  Financial  Statements, 

| Ambac Financial Group, Inc.   64   2017 FORM 10-K |

included in Part II, Item 8 in this Form 10-K, for a discussion of 
the  impact  of  recent  accounting  pronouncements  on  Ambac’s 
financial condition and results of operations.

AMBAC ASSURANCE STATUTORY BASIS FINANCIAL 
RESULTS

Ambac  Assurance,  Everspan  and  the  Segregated  Account’s 
statutory  financial  statements  are  prepared  on  the  basis  of 
accounting  practices  prescribed  or  permitted  by  the  OCI.  OCI 
recognizes  only  statutory  accounting  practices  prescribed  or 
permitted by the State of Wisconsin (“SAP”) for determining and 
reporting the financial condition and results of operations of an 
insurance company for determining its solvency under Wisconsin 
Insurance  Law.  The  National  Association  of 
Insurance 
Commissioners (“NAIC”) Accounting Practices and Procedures 
manual  (“NAIC  SAP”)  has  been  adopted  as  a  component  of 
prescribed practices by the State of Wisconsin.  OCI has prescribed 
or permitted additional accounting practices for Ambac Assurance, 
Everspan and the Segregated Account which are described in Note 
8. Insurance Regulatory Restrictions to the Consolidated Financial 
Statements included in Part II, Item 8 in this Form 10-K.  As a 
result  of  these  prescribed  and  permitted  practices,  Ambac 
Assurance’s policyholder surplus at December 31, 2017 and 2016 
was  less  than  $104.1  million  and  higher  by  $17.3  million, 
respectively, than if Ambac Assurance and the Segregated Account 
had reported such amounts in accordance with NAIC SAP. 

Under Wisconsin  insurance  law,  the  Segregated Account  was  a 
separate  insurer  from  Ambac  Assurance  and  accordingly  was 
subject to all of the filing and statutory reporting requirements of 
Wisconsin domiciled insurers.  The total assets, total liabilities, 
and total surplus of the Segregated Account are reported as discrete 
components of Ambac Assurance’s assets, liabilities, and surplus 
in  Ambac  Assurance’s  statutory  basis  financial  statements. 
Accordingly, Ambac Assurance’s  statutory  financial  statements 
include the results of Ambac Assurance’s general account and, to 
the  extent  allowable  under  a  prescribed  accounting  practice  by 
OCI, the Segregated Account. Pursuant to this prescribed practice, 
the  results  of  the  Segregated Account  are  not  fully  included  in 
Ambac  Assurance’s  statutory  financial  statements  if  Ambac 
Assurance’s  surplus  is  (or  would  be)  less  than  $100.0  million 
(“Minimum  Surplus  Amount”).  Ambac  Assurance’s  surplus  as 
regards to policyholders exceeded the Minimum Surplus Amount.

Ambac Assurance’s statutory policyholder surplus and qualified 
statutory capital (defined as the sum of policyholders surplus and 
mandatory  contingency  reserves)  were  $699.6  million  and 
$1,155.8 million at December 31, 2017, respectively, as compared 
to  $976.5  million  and  $1,368.3  million  at  December 31,  2016, 
respectively. The  Segregated  Account’s  statutory  policyholder 
surplus  amount  was  $376.2  million  and  $381.3  million  as  of 
December 31, 2017 and 2016, respectively. 

Following  the  effectiveness  of  the  Second  Amended  Plan  of 
Rehabilitation and in accordance with the Stipulation and Order, 
Ambac Assurance is exempt from all filing requirements of the 
OCI  and  National  Association  of  Insurance  Commissioners 
regarding the Segregated Account that become due in or after the 
calendar quarter immediately following the effective date of the 
Second Amended Plan of Rehabilitation (second quarter of 2018). 

Ambac  Assurance’s  decrease  in  policyholder  surplus  was 
primarily due to decline in fair value of below investment grade 
bond  investments  and  contributions  to  contingency  reserves, 
partially offset by statutory net income.  Statutory net income was 
primarily  due  to  premium  earnings  and  investment  income, 
partially offset by loss and loss expenses incurred on Puerto Rico 
insured exposures. 

The Segregated Account’s decrease in policyholder surplus was 
primarily due to a reduction in junior surplus notes as a result of 
rent payments made by Ambac Assurance during the year ended 
December 31, 2017. 

Ambac Assurance’s statutory policyholder surplus includes $370.2 
million of junior surplus notes issued by the Segregated Account, 
including  $350.0  million  that Ambac  deposited  into  a  statutory 
trust (as further discussed within Liquidity and Capital Resources 
in  this  Management's  Discussion  and  Analysis).  These  junior 
surplus  notes,  as  well  as  preferred  stock  issued  by  Ambac 
Assurance  with  a  liquidation  preference  of  $660.3  million,  are 
obligations that have claims on the resources of Ambac Assurance 
which  impact Ambac's  ability  to  realize  residual  value  from  its 
equity in Ambac Assurance.

increase 

Ambac  Assurance’s  statutory  surplus  is  sensitive  to  multiple 
factors, including: (i) loss reserve development, (ii) approval by 
OCI of interest payments on existing surplus notes, (iii) approval 
by OCI of principal or interest payments on existing junior surplus 
notes,  (iv)  deterioration  in  the  financial  position  of  Ambac 
Assurance subsidiaries that have their obligations guaranteed by 
Ambac  Assurance,  (v) first  time  payment  defaults  of  insured 
obligations,  which 
reserves, 
(vi) commutations  of  insurance  policies  or  credit  derivative 
contracts  at  amounts  that  differ  from  the  amount  of  liabilities 
recorded, (vii) reinsurance contract terminations at amounts that 
differ from net assets recorded, (viii) changes to the fair value of 
investments carried at fair value, (ix) settlements or resolutions of 
representation and warranty breach claims at amounts that differ 
from amounts recorded, including failures to collect such amounts, 
(x) realized gains and losses, including losses arising from other 
than  temporary  impairments  of  investment  securities,  and 
(xi) future changes to prescribed SAP practices by the OCI. 

statutory 

loss 

As of December 31, 2017, total unpaid interest, which will require 
OCI approval for payment, for surplus notes outstanding to third 
parties  and  junior  surplus  notes  was  $314.4  million  and  $86.3 
million, respectively at the scheduled interest payment date of June 
7, 2017.  Under SAP, these amounts will be recorded as a liability 
once approval for payment has been granted by OCI.   

The significant differences between GAAP and SAP are that under 
SAP: 

•  Loss reserves are only established for losses on guaranteed 
obligations that have defaulted  in an amount that is sufficient 
to cover the present value of the anticipated defaulted debt 
service  payments  over  the  expected  period  of  default,  less 
estimated  recoveries  under  subrogation  rights  (5.1%  as 
prescribed by OCI). Loss reserves are established for non-
defaulted policies on the date when a binding commutation 
contract  is  signed  by  the  counterparty.    Under  GAAP,  in 
addition to the establishment of loss reserves for defaulted 
obligations, loss reserves are established (net of GAAP basis 

| Ambac Financial Group, Inc.   65   2017 FORM 10-K |

unearned  premium  revenue)  for  obligations  that  have 
experienced credit deterioration, but have not yet defaulted 
using a weighted-average risk-free discount rate, currently at 
2.5%. 

•  Mandatory contingency reserves are required based upon the 
type of obligation insured, whereas GAAP does not require 
such  a  reserve.  Releases  of  the  contingency  reserves  are 
generally  subject 
to  a 
determination that the held reserves are deemed excessive. 

to  OCI  approval  and  relate 

•  Investment  grade  fixed  income  investments  are  stated  at 
amortized  cost  and  certain  below  investment  grade  fixed 
income investments are reported at the lower of amortized 
cost or fair value. Under GAAP, all fixed income investments 
are reported at fair value. 

•  Wholly owned subsidiaries are not consolidated; rather, the 
equity basis of accounting is utilized and the carrying values 
of these investments are subject to admissibility tests. When 
Ambac Assurance’s share of the subsidiaries’ losses exceeds 
the related carrying amounts of the wholly owned subsidiary, 
Ambac Assurance discontinues applying the equity method 
and the investment is reduced to zero. For those subsidiaries 
that  have  insufficient  claims  paying  resources  and  whose 
obligations  are  guaranteed  by  Ambac  Assurance,  Ambac 
Assurance  records  an  estimated  impairment  for  probable 
losses which are in excess of the subsidiaries’ claims paying 
resources. 

•  Variable interest entities are not required to be assessed for 
consolidation. Under GAAP, a reporting entity that has both 
the  following  characteristics  is  required  to  consolidate  the 
VIE: a) the power to direct the activities of the VIE that most 
significantly impact the VIE’s economic performance; and b) 
the obligation to absorb losses of the VIE or the right to receive 
benefits from the VIE that could potentially be significant to 
the VIE. Ambac generally has the obligation to absorb losses 
of VIEs that could potentially be significant to the VIE as the 
result of its guarantee of insured obligations issued by VIEs. 
For certain VIEs Ambac Assurance has the power to direct 
the  most  significant  activities  of  the  VIE  and  accordingly 
consolidates the related VIEs under GAAP. 

•  All payments of principal and interest on the surplus notes 
are subject to the approval of the OCI.  Unpaid interest due 
on  the  surplus  notes  is  expensed  when  the  approval  for 
payment  of  interest  has  been  granted  by  the  OCI.    Under 
GAAP, interest on surplus notes is accrued regardless of OCI 
approval. 

•  Upfront premiums written are earned on a basis proportionate 
to the remaining scheduled debt service to the original total 
principal  and  interest  insured.  Installment  premiums  are 
reflected in income pro-rata over the period covered by the 
premium payment. When an insurance policy has been legally 
defeased, the related portion of unearned premium revenue 
is accelerated and recognized as premiums earned.  Under 
GAAP, premium revenues for both upfront and installment 
premiums are earned over the life of the financial guarantee 
contract  in  proportion  to  the  insured  principal  amount 
outstanding at each reporting date. When an insured bond has 
been retired, any remaining UPR is recognized at that time to 

the  extent  the  financial  guarantee  contract  is  legally 
extinguished,  causing  accelerated  premium  revenue.  For 
installment  premium  paying  transactions,  we  offset  the 
recognition of any remaining UPR by the reduction of the 
related premium receivable to zero, which may cause negative 
accelerated  premium  revenue.    For  bonds  that  are  legally 
defeased, generally through a refunding or a pre-refunding, 
the remaining unearned premium revenue is not accelerated 
but is recognized over the remaining life of the defeasance 
period.

•  Fresh  start  financial  statement  reporting  is  not  a  concept 
within SAP.  Under GAAP, Ambac determined that fresh start 
financial  statement  reporting  was  to  be  applied  upon  our 
emergence from Chapter 11. Fresh start financial reporting 
required Ambac to adjust the historical carrying of its assets 
and liabilities to fair value, including an insurance intangible 
asset which represented the difference between the fair value 
and  aggregate  carrying  value  of  the  financial  guarantee 
insurance  and  reinsurance  assets  and  liabilities.  This 
insurance intangible asset is amortized as an expense on a 
level yield basis over the life of the related insurance risks. 

AMBAC UK FINANCIAL RESULTS UNDER UK 
ACCOUNTING PRINCIPLES

Ambac UK is required to prepare financial statements under FRS 
102 "The Financial Reporting Standard applicable in the UK and 
Republic  of  Ireland."  Ambac  UK’s  shareholder  funds  under 
UK GAAP  were  £266.3  million  at  December 31,  2017  as 
compared to £157.9 million at December 31, 2016. Ambac UK’s 
improvement  in  shareholders’  funds  was  primarily  due  to  net 
income arising from the receipt of premiums, investment return in 
the  period  and  reduction  in  loss  provisions,  including  amounts 
associated with Ballantyne's litigation settlement in April 2017.  At 
December 31, 2017, the carrying value of cash and investments 
was  £459.8  million,  a  decrease  from  £460.4  million  at 
December 31, 2016. The decrease in cash and investments is due 
to loss expenses, tax payments and unrealized foreign exchange 
losses on investments denominated in currencies other then Ambac 
UK's functional currency (British Pounds) in the period, partially 
offset by the continued receipt of premiums, investment coupons 
from Ambac UK's investment portfolio and increases in the value 
of investments in pooled funds.

The significant differences between U.S. GAAP and UK GAAP 
are that under UK GAAP: 

•  Loss reserves are only established for losses on guaranteed 
obligations  when,  in  the  judgment  of  management,  a 
monetary  default  in  the  timely  payment  of  debt  service  is 
likely to occur, which would result in Ambac UK incurring a 
loss. A  loss  provision  is  established  in  an  amount  that  is 
sufficient  to  cover  the  present  value  (currently  using  a 
discount  rate  of  4.42%)  of  the  anticipated  defaulted  debt 
service  payments  over  the  expected  period  of  default,  less 
estimated recoveries under subrogation rights. The discount 
rate is equal to the lower of the rate of return on invested assets 
for either the current year or the period covering the current 
year  plus  the  four  previous  years.  Under  U.S.  GAAP,  loss 
reserves are established (net of U.S. GAAP basis unearned 
premium  revenue)  for  obligations  that  have  experienced 
credit  deterioration,  but  have  not  yet  defaulted  using  a 

| Ambac Financial Group, Inc.   66   2017 FORM 10-K |

weighted-average risk-free discount rate, currently at 1.6% 
for Ambac UK related transactions. 

•  Investments in fixed income securities are stated at amortized 
cost,  subject 
impairment 
to  an  other-than-temporary 
evaluation. Under U.S. GAAP, all bonds are reported at fair 
value. 

•  Purchases of Ambac UK insured securities are bifurcated into 
an  intrinsic  and  an  Ambac  UK  claim  based  value.    The 
intrinsic  value  is  recorded  as  an  investment  whereas  the 
Ambac UK claim based value is recorded as a claim payment 
with an accompanying reduction in Ambac UK loss reserves.  
Under U.S. GAAP, purchases of Ambac UK insured securities 
are reported as investments and do not reduce loss reserves.

•  Variable  interest  entities  (“VIE”)  are  not  required  to  be 
assessed  for  consolidation.  Under  U.S.  GAAP,  a  reporting 
entity that has both the following characteristics is required 
to consolidate the VIE: a) the power to direct the activities of 
the VIE that most significantly impact the VIE’s economic 
performance; and b) the obligation to absorb losses of the VIE 
or  the  right  to  receive  benefits  from  the  VIE  that  could 
potentially be significant to the VIE. Ambac generally has the 
obligation to absorb losses of VIEs that could potentially be 
significant to the VIE as the result of its guarantee of insured 
obligations issued by VIEs. For certain VIEs Ambac UK has 
the power to direct the most significant activities of the VIE 
and  accordingly  consolidates  the  related  VIEs  under  U.S. 
GAAP. 

•  Upfront premiums written are earned on a basis proportionate 
to the remaining scheduled debt service to the total principal 
and interest insured. Installment premiums are reflected in 
income  pro-rata  over  the  period  covered  by  the  premium 
payment.  Under  U.S.  GAAP,  premium  revenues  for  both 
upfront and installment premiums are earned over the life of 
the financial guarantee contract in proportion to the insured 
principal amount outstanding at each reporting date. 

Ambac  UK  is  also  required  to  prepare  financial  information  in 
accordance  with  the  Solvency  II  Directive.   The  basis  of 
preparation of this information is significantly different from both 
US GAAP and UK GAAP.  The calculation of capital resources, 
regulatory  capital  requirements  and  regulatory  capital  deficits 
under Solvency II at December 31, 2017 will be be published on 
Ambac's website.

Capital resources under Solvency II were a surplus of £55.1 million 
at  December 31,  2017  an  improvement  from  a  deficit  of  £67.1 
million at January 1, 2017.  The capital resources at December 31, 
2017 and January 1, 2017 are in comparison to regulatory capital 
requirements of £343.6 million and £334.9 million, respectively. 
Ambac  UK  is  therefore  deficient  in  terms  of  compliance  with 
applicable regulatory capital requirements by £288.5 million and 
£402.0  million  at  December 31,  2017  and  January 1,  2017, 
respectively.  The regulators are aware of the deficiency in capital 
resources  as  compared  to  capital  requirements  and  dialogue 
between  Ambac  UK  management  and  its  regulators  remains 
ongoing with respect to options for addressing the shortcoming, 
although such options remain few.

NON-GAAP FINANCIAL MEASURES

In addition to reporting the Company’s quarterly financial results 
in accordance with GAAP, the Company reports two non-GAAP 
financial measures: Adjusted Earnings and Adjusted Book Value. 
The  most  directly  comparable  GAAP  measures  are  net  income 
attributable  to  common  stockholders  for Adjusted  earnings  and 
Total  Ambac  Financial  Group,  Inc.  stockholders’  equity  for 
Adjusted  Book  value.    A  non-GAAP  financial  measure  is  a 
numerical measure of financial performance or financial position 
that  excludes  (or  includes)  amounts  that  are  included  in  (or 
excluded from) the most directly comparable measure calculated 
and presented in accordance with GAAP. We are presenting these 
non-GAAP  financial  measures  because  they  provide  greater 
transparency and enhanced visibility into the underlying drivers 
of our business. Adjusted Earnings and Adjusted Book Value are 
not substitutes for the Company’s GAAP reporting, should not be 
viewed in isolation and may differ from similar reporting provided 
by  other  companies,  which  may  define  non-GAAP  measures 
differently. 

Ambac has a significant U.S. tax net operating loss (“NOL”) that 
is offset by a full valuation allowance in the GAAP consolidated 
financial statements. As a result of this and other considerations, 
we utilized a 0% effective tax rate for non-GAAP adjustments; 
which is subject to change.  

The  following  paragraphs  define  each  non-GAAP  financial 
measure and describe why it is useful. A reconciliation of the non-
GAAP financial measure and the most directly comparable GAAP 
financial measure is also presented below. 

Adjusted Earnings (Loss). Adjusted Earnings (Loss) is defined as 
net income (loss) attributable to common stockholders, as reported 
under GAAP, adjusted on an after-tax basis for the following: 

•  Non-credit  impairment  fair  value  (gain)  loss  on  credit 
derivatives:  Elimination  of  the  non-credit  impairment  fair 
value gains (losses) on credit derivatives, which is the amount 
in excess of the present value of the expected estimated credit 
losses. Such fair value adjustments are affected by, and in part 
fluctuate with, changes in market factors such as interest rates 
and  credit  spreads,  including  the  market’s  perception  of 
Ambac’s credit risk (“Ambac CVA”), and are not expected to 
result in an economic gain or loss. These adjustments allow 
for  all  financial  guarantee  contracts  to  be  accounted  for 
consistent with the Financial Services – Insurance Topic of 
ASC, whether or not they are subject to derivative accounting 
rules. 

•  Insurance  intangible  amortization  and  impairment  of 
goodwill:  Elimination  of  the  amortization  of  the  financial 
guarantee  insurance  intangible  asset  and  impairment  of 
goodwill that arose as a result of the implementation of Fresh 
Start reporting. These adjustments ensure that all financial 
guarantee  contracts  are  accounted  for  consistent  with  the 
provisions of the Financial Services – Insurance Topic of the 
ASC. 

•  Foreign exchange (gains) losses: Elimination of the foreign 
exchange  gains  (losses)  on  the  re-measurement  of  assets, 
liabilities and transactions in non-functional currencies.  This 
adjustment eliminates the foreign exchange gains (losses) on 

| Ambac Financial Group, Inc.   67   2017 FORM 10-K |

all  assets,  liabilities  and  transactions  in  non-functional 
currencies, which enables users of our financial statements to 
better  view  the  business  results  without  the  impact  of 
fluctuations in foreign currency exchange rates, particularly 
as assets held in non-functional currencies have grown, and 
facilitates  period-to-period  comparisons  of  Ambac's 
operating performance. 

•  Fair value (gain) loss on interest rate derivative from Ambac 
CVA: Elimination of the gains (losses) relating to Ambac’s 
CVA on interest rate derivative contracts.  Similar to credit 
derivatives,  fair  values  include  the  market’s  perception  of 
Ambac’s credit risk and this adjustment only allows for such 
gain or loss when realized. 

The following table reconciles net income attributable to common stockholders to the non-GAAP measure, Adjusted Earnings on a total dollar 
amount and per diluted share basis, for all periods presented:

($ in millions, except per share data)
Year Ended December 31,

Net income (loss) attributable to common

shareholders

Adjustments:

Non-credit impairment fair value (gain) loss on credit

derivatives

Insurance intangible amortization

Impairment of goodwill
Foreign exchange (gains) losses (1)

Fair value (gain) loss on interest rate derivatives from

Ambac CVA

2017

2016

2015

$ Amount

Per Diluted
Share

$ Amount

Per Diluted
Share

$ Amount

Per Diluted
Share

$

(328.7) $

(7.25) $

74.8

$

1.64

$

493.4

$

10.72

(10.9)

150.9

—

(21.3)

44.9

(0.24)

3.33

—

(0.47)

0.99

(7.5)

174.6

—

39.1

33.8

(0.16)

3.82

—

0.86

0.73

6.89

(36.7)

169.6

514.5

27.4

(14.2)

$

1,154.0

$

(0.80)

3.69

11.18

0.60

(0.31)

25.08

Adjusted Earnings (Loss)

$

(165.1) $

(3.64) $

314.8

$

Net income (loss) effects of financial guarantee VIE consolidation: 
VIEs  that  were  consolidated  as  a  result  of  financial  guarantees 
provided by Ambac are accounted for on a fair value basis. Included 
within Net income (loss) attributable to common stockholders of 
these consolidated VIEs was $19.7 million, $(14.1) million, and 
$31.6 million for the years ended December 31, 2017, 2016 and 
2015,  respectively.  Had  these  financial  guarantee  VIEs  been 
accounted  for  under  the  provisions  of  the  Financial  Services  - 
Insurance Topic of the ASC, the impact would have been $50.3 
million,  $147.6  million  and  $42.7  million  for  the  years  ended 
December 31, 2017, 2016 and 2015, respectively. The net impact 
of these different accounting bases on Net income attributable to 
common stockholders (including per share amounts) was $30.7 
million ($0.68 per share), $161.7 million ($3.54 per diluted share), 
$11.1 million and ($0.24 per diluted share), for the years ended 
December  31,  2017,  2016  and  2015,  respectively.  This  is 
supplemental information only and is not a component of Adjusted 
Earnings.

Adjusted Book Value. Adjusted Book Value is defined as Total 
Ambac  Financial  Group,  Inc.  stockholders’  equity  as  reported 
under GAAP, adjusted for after-tax impact of the following: 

•  Non-credit impairment fair value losses on credit derivatives: 
Elimination of the non-credit impairment fair value loss on 
credit derivatives, which is the amount in excess of the present 
value of the expected estimated economic credit loss. GAAP 
fair values are affected by, and in part fluctuate with, changes 
in  market  factors  such  as  interest  rates,  credit  spreads, 
including Ambac’s CVA that are not expected to result in an 
economic  gain  or  loss.  These  adjustments  allow  for  all 
financial  guarantee  contracts  to  be  accounted  for  within 
Adjusted Book Value consistent with the provisions of the 

Financial Services—Insurance Topic of the ASC, whether or 
not they are subject to derivative accounting rules. 

emergence 

•  Insurance  intangible  asset:  Elimination  of  the  financial 
guarantee insurance intangible asset that arose as a result of 
Ambac’s 
the 
from 
implementation  of  Fresh  Start  reporting.  This  adjustment 
ensures that all financial guarantee contracts are accounted 
for within Adjusted Book Value consistent with the provisions 
of the Financial Services—Insurance Topic of the ASC. 

bankruptcy 

and 

•  Ambac CVA on interest rate derivative liabilities: Elimination 
of the gain relating to Ambac’s CVA on interest rate derivative 
contracts. Similar to credit derivatives, fair values include the 
market’s  perception  of  Ambac’s  credit  risk  and  this 
adjustment only allows for such gain when realized. 

•  Net unearned premiums and fees in excess of expected losses: 
Addition  of  the  value  of  the  unearned  premium  revenue 
("UPR")  on  financial  guarantee  contracts,  in  excess  of 
expected  losses,  net  of  reinsurance.    This  non-GAAP 
adjustment  presents  the  economics  of  UPR  and  expected 
losses for financial guarantee contracts on a consistent basis. 
In  accordance  with  GAAP,  stockholders’  equity  reflects  a 
reduction for expected losses only to the extent they exceed 
UPR.  However, when expected losses are less than UPR for 
a  financial  guarantee  contract,  neither  expected  losses  nor 
UPR have an impact on stockholders’ equity. This non-GAAP 
adjustment  adds  UPR  in  excess  of  expected  losses,  net  of 
reinsurance, to stockholders’ equity for financial guarantee 
contracts where expected losses are less than UPR. 

| Ambac Financial Group, Inc.   68   2017 FORM 10-K |

•  Net  unrealized  investment  (gains)  losses  in  Accumulated 
Other Comprehensive Income: Elimination of the unrealized 
gains  and  losses  on  the  Company’s  investments  that  are 
recorded 
accumulated  other 
comprehensive income (“AOCI”). The AOCI component of 
the  fair  value  adjustment  on  the  investment  portfolio  may 

component  of 

as 

a 

differ from realized gains and losses ultimately recognized 
by the Company based on the Company’s investment strategy. 
This  adjustment  only  allows  for  such  gains  and  losses  in 
Adjusted Book Value when realized. 

The following table reconciles Total Ambac Financial Group, Inc. stockholders’ equity to the non-GAAP measure Adjusted Book Value on a 
total dollar amount and per share basis, for all periods presented:

($ in millions, except per share data) December 31,

$ Amount

Per Share

$ Amount

Per Share

Total Ambac Financial Group, Inc. stockholders’ equity

$

1,381.1

$

30.52

$

1,713.9

$

37.94

2017

2016

Adjustments:

Non-credit impairment fair value losses on credit derivatives

Insurance intangible asset

Ambac CVA on interest rate derivative liabilities

Net unearned premiums and fees in excess of expected losses

Net unrealized investment (gains) losses in Accumulated Other

Comprehensive Income

Adjusted Book Value

0.6

(847.0)

—

597.3

(30.8)

0.01

(18.71)

—

13.20

(0.68)

11.4

(962.1)

(44.9)

732.2

(118.9)

$

1,101.3

$

24.34

$

1,331.7

$

0.25

(21.30)

(0.99)

16.21

(2.63)

29.48

Stockholders'  equity  effects  of 
financial  guarantee  VIE 
consolidation: VIEs that were consolidated as a result of financial 
guarantees provided by Ambac are accounted for on a fair value 
basis.  The  impact  on  Total  Ambac  Financial  Group,  Inc. 
stockholders' equity of these consolidated VIEs was $134.1 million 
and $132.4 million at December 31, 2017 and 2016, respectively. 
Had these financial guarantee VIEs been accounted for under the 
provisions of the Financial Services Insurance Topic of the ASC, 
the impact on AFG stockholders' equity would have been $178.7 
million  and  $139.2  million  at  December  31,  2017  and  2016, 
respectively. The net change of these different accounting bases 
(including per share amounts) was $44.6 million ($0.99 per share) 
and $6.7 million ($0.15 per share), at December 31, 2017 and 2016, 
respectively.  This is supplemental information only and is not a 
component of Adjusted Book Value.

Factors that impact changes to Adjusted Book Value include many 
of the same factors that impact Adjusted Earnings, including the 
majority  of  revenues  and  expenses,  but  generally  exclude 
components of premium earnings since they are embedded in prior 
period's Adjusted Book Value through the net unearned premiums 
and fees in excess of expected losses adjustment.  Net unearned 
premiums and fees in excess of expected losses will affect Adjusted 
Book Value for (i) changes to future premium assumptions (e.g. 
expected term, interest rates, foreign currency rates, time passage) 
and (ii) changes to expected losses for policies which do not exceed 
their  related  unearned  premiums.  The  Adjusted  Book  Value 
decrease  from  December 31,  2016  to  December 31,  2017  was 
primarily driven by Adjusted earnings.

| Ambac Financial Group, Inc.   69   2017 FORM 10-K |

PRO FORMA BALANCE SHEET AND PRO FORMA ADJUSTED BOOK VALUE

The following unaudited pro forma consolidated balance sheet of Ambac as of December 31, 2017, is based on the historical consolidated 
financial statements of Ambac giving effect to the Rehabilitation Exit Transactions as further described in Note 1. Background and Business 
Description and Note 17. Subsequent Events of the Consolidated Financial Statements in Part II, Item 8 of this Form 10-K.  The unaudited 
pro  forma  consolidated  balance  sheet  of Ambac  includes  unaudited  pro  forma  adjustments  that  are  driven  by  assumptions  and  factually 
supportable information directly attributable to the Rehabilitation Exit Transactions and the Tier 2 Notes Issuance as if they occurred on 
December 31, 2017 rather than February 12, 2018. 

AMBAC FINANCIAL GROUP, INC.
PRO FORMA CONDENSED CONSOLIDATED GAAP BALANCE SHEET
(Unaudited)

December 31,
2017

Adjustments

Pro forma
December 31,
2017

(dollars in millions)

Assets:

Total non-variable interest entity investments, cash and cash equivalents

$

6,364

$

Subrogation recoverable

Other assets

Total VIE assets

Total assets

Liabilities and Stockholders' Equity:

Liabilities:

Loss and loss expense reserve

Long-term debt

Accrued interest payable

Other liabilities

Total VIE liabilities

Total liabilities

Stockholders' equity

$

$

631

1,696

14,501

23,192

$

4,745

$

992

437

1,007

14,366

21,547

1,645

(1)

(2)

(3)

(1,786)

1,312

(9)

—

(483)

(2,555)

1,952

(224)

(2)

(4)

(4)

—

—

(827)

344

(2)(5)(6)

Total liabilities and stockholders' equity

$

23,192

$

(483)

(1)  The net cash and investment outflows reflects the distributions under the Rehabilitation Exit Transactions as follows:  

(dollars in millions)

Cash payment to third parties for settlement of Deferred Amounts and Surplus Notes

Cash payment for unpaid claims presented after record date

Cash payment for one-time current interest payment on remaining surplus notes

Cash payment for remaining debt issuance costs

Receipt of Tier 2 proceeds

Receipt of Secured Notes issued by Ambac LSNI

Reduction in value of Ambac-insured RMBS securities held in the investment portfolio

$

$

$

$

$

$

4,578

1,943

1,687

14,501

22,710

2,190

2,944

213

1,007

14,366

20,720

1,989

22,710

(1,347)

(30)

(11)

(8)

240

764

(1,394)

(1,786)

(2)  The transactions pursuant to the Second Amended Plan of Rehabilitation where Ambac is settling its unpaid claims at a discount is being accounted for 
as an extinguishment, where the discount of approximately $287 is reflected in the pro forma consolidated balance sheet as an increase to Retained 
Earnings. As a result of the settlement, future net cash flows on certain policies will become an asset and are reclassified to Subrogation recoverable.  

(3)  Reflects the reclass of previously capitalized costs directly associated with the issuance of the Ambac Notes or Tier 2 Notes to Long-term debt that will 

be amortized as part of the effective yield calculation.  

(4)  The discount received in the other Rehabilitation Exit Transactions are being accounted for as a debt modification since the creditors before and after the 
discount remain the same and the change in the terms is not considered substantial. A substantial change is considered to be a change in cash flows of 
equal to or greater than 10% as a result of the modification of terms. As the change in cash flows is less than 10%, debt modification accounting is 
appropriate.  Under debt modification accounting, no gain or loss is recorded, and a new effective interest rate is established based on the Ambac Note 
cash flows.  Additionally, any consideration paid that is directly related to the issuance of the Ambac Note is capitalized and amortized as part of the 
effective yield calculation. The net long-term debt increase reflects the impact of the Rehabilitation Exit Transactions as follows: 

| Ambac Financial Group, Inc.   70   2017 FORM 10-K |

(dollars in millions)

Tier 2 Notes issuance

Ambac Note issuance

Cash payment for on-time current interest payment on remaining surplus notes

Deferred loss on Rehabilitation Exit Transactions and debt issuance costs

Reduction in carrying value of Surplus Notes

Long-term Debt

Accrued Interest
Payable

$

$

240

$

2,145

—

(20)

(413)

1,952

$

—

—

(11)

—

(213)

(224)

(5)  As a result of the Rehabilitation Exit Transactions, Ambac will receive settlement of its ownership in Deferred Amounts and would realize a gain of $57 

over the carrying value of the associated Ambac-insured RMBS as of December 31, 2017.  

(6)  This pro forma information does not incorporate any assumptions regarding taxes. 

The following table reconciles total Ambac Financial Group, Inc. stockholders' equity to the non-GAAP measure Adjusted Book Value.

PROFORMA ADJUSTED BOOK VALUE

Reported

Pro Forma
Post Restructuring (1)

December 31, 2017

December 31, 2017

Change

($ in millions, except per share data)

$ Amount

Per Share

$ Amount

Per Share

$ Amount

Per Share

Total AFGI Shareholders' Equity

$

1,381.1

$

30.52

$

1,725.2

38.08

$

344.0

$

7.56

Adjustments:

Non-credit impairment unrealized fair value 

losses on credit derivatives

Insurance intangible asset

Net unearned premiums and fees in excess of 

expected losses

Net unrealized investment (gains) losses in 

AOCI

Adjusted book value

Shares Outstanding (in millions)

0.6

(847.0)

0.01

(18.71)

0.6

(847.0)

0.01

(18.71)

597.3

13.20

597.3

13.20

(30.8)

(0.68)

(30.8)

(0.68)

—

—

—

—

—

—

—

—

$

1,101.3

$

24.34

$

1,445.3

$

31.90

$

344.0

$

7.56

45.3

45.3

(1)  Pro forma amounts are estimates, subject to revisions and are not reflective of actual or future operating results. 

Item 7A.   Quantitative  and  Qualitative  Disclosures 
about Market Risk

Market risk represents the potential for losses that may result from 
changes in the value of a financial instrument as a result of changes 
in market conditions. The primary market risks that would impact 
the value of Ambac’s financial instruments are interest rate risk, 
credit spread risk and foreign currency risk. Below we discuss each 
of  these  risks  and  the  specific  types  of  financial  instruments 
impacted.  Senior  managers  are  responsible  for  developing  and 
applying methods to measure risk. Ambac utilizes various systems, 
models and sensitivity scenarios to monitor and manage market 
risk. These models include estimates, made by management, which 
utilize  current  and  historical  market  information. The  valuation 
results from these models could differ materially from amounts 
that would actually be realized in the market.  Financial instruments 
of  VIEs  that  are  consolidated  as  a  result  of Ambac's  financial 
guarantees are excluded from the market risk measures below. 

Interest Rate Risk:

Financial  instruments  for  which  fair  value  may  be  affected  by 
changes  in  interest  rates  consist  primarily  of  fixed  income 
investment securities, long-term debt and interest rate derivatives. 
Fixed income investment securities that are guaranteed by Ambac 
have interest rate risk characteristics that behave inversely to those 

associated  with  future  financial  guarantee  claim  payments.   
Accordingly, such securities are excluded from the interest rate 
sensitivity table below.

Changes in fair value resulting from changes in interest rates are 
driven  primarily  by  the  impact  of  interest  rate  shifts  on  the 
investment portfolio (which produce net fair value losses as rates 
increase)  and  long-term  debt  and  the  interest  rate  derivatives 
portfolio (which produce net fair value gains as rates increase). 
Interest rate increases would also have a negative economic impact 
on expected future claim payments within the financial guarantee 
portfolio.  Ambac  performs  scenario  testing  to  measure  the 
potential for losses in volatile markets. These scenario tests include 
parallel and non-parallel shifts in the benchmark interest rate curve.

The interest rate derivatives portfolio is managed as an economic 
hedge against the effects of rising interest rates elsewhere in the 
Company,  including  on Ambac's  financial  guarantee  exposures 
(the "macro-hedge").  As a result of the commutation of certain 
financial guarantee customer swaps in June 2017, the macro-hedge 
encompasses  the  entire  interest  rate  derivatives  portfolio  as  of 
December 31, 2017.  The interest rate sensitivity of the interest 
rate derivatives portfolio attributable to the macro-hedge position 
would produce mark-to-market gains or losses of approximately 

| Ambac Financial Group, Inc.   71   2017 FORM 10-K |

$0.8 million for a 1 basis point parallel shift in USD benchmark 
interest rates up or down at December 31, 2017.

The following table summarizes the estimated change in fair value 
(based primarily on the valuation methodology discussed in Note 

9.  Fair  Value  Measurements  to  the  Consolidated  Financial 
Statements included in Part II, Item 8 in this Form 10-K) on these 
financial  instruments,  assuming  immediate  changes  in  interest 
rates at specified levels at December 31, 2017:

($ in millions)

Estimated change in net fair value

Estimated net fair value

(1) 

Incorporates an interest rate floor of 0%

Change in Interest Rates

300 basis point
rise

200 basis point
rise

100 basis point
rise

Base scenario

100 basis point 
decline(1)

200 basis point 
decline(1)

$

$

181

871

121

811

60

750

—

690

(61)

629

(123)

567

Due to the low interest rate environment as of December 31, 2017, 
stress scenarios involving interest rate declines greater than 200 
basis points are not meaningful to Ambac's portfolios.

Credit Spread Risk:

Financial instruments that may be adversely affected by changes 
in spreads include Ambac’s outstanding credit derivative contracts, 
certain interest rate derivatives and investment assets. Changes in 
spreads are generally caused by changes in the market’s perception 
of the credit quality of the underlying obligor. Market liquidity and 

($ in millions)

Estimated change in fair value

Estimated fair value

Also included in the fair value of credit derivative liabilities is the 
effect  of  Ambac’s  creditworthiness,  which  reflects  market 
perception of Ambac’s ability to meet its obligations. Incorporating 
estimates  of  Ambac’s  credit  valuation  adjustment  into  the 
determination of fair value has resulted in less than $0.1 million 
reduction  to  the  credit  derivatives  liability  as  of  December 31, 
2017.    At  December 31,  2017  the  credit  valuation  adjustment 
resulted in a 9.6% reduction of the credit derivative liability as 
measured before considering Ambac credit risk. Refer to Note 9. 
Fair  Value  Measurements 
the  Consolidated  Financial 
to 
Statements included in Part II, Item 8 in this Form 10-K for further 
information on measurement of the credit valuation adjustment.

The fair value of interest rate derivatives may also be affected by 
changes to the credit valuation adjustment attributable to the risk 
of Ambac  non-performance.  Generally,  the  need  for  an Ambac 
credit  valuation  adjustment  is  mitigated  by  the  existence  of 
collateral posting agreements under which adequate collateral has 
been posted. Derivative contracts entered into with credit exposure 
to  financial  guarantee  customers  are  not  typically  subject  to 
collateral posting agreements. As a result of the commutation of 
certain  derivatives  in  June  2017,  there  are  no  significant 
liabilities  as  of 
uncollateralized 

rate  derivative 

interest 

prevailing risk premiums demanded by market participants are also 
reflected in spreads and impact valuations.

The following table summarizes the estimated change in fair values 
on Ambac’s net derivative liabilities  assuming immediate parallel 
shifts in reference obligation credit spreads related to written credit 
derivatives  and  counterparty  credit 
to 
uncollateralized interest rate derivatives at December 31, 2017.  It 
is more likely that actual changes in credit spreads will vary by 
obligor:

spreads 

related 

Change in Obligor Spreads

250 basis point
widening

50 basis point
widening

Base scenario

50 basis point
narrowing

250 basis point
narrowing

$

$

(23)

(33)

(5)

(15)

—

(10)

4

(6)

7

(3)

December 31,  2017. 
  Therefore,  Ambac’s  credit  valuation 
adjustment included in the fair value of interest rate derivatives 
was $0.0 million as of December 31, 2017.

As a result of declines in uncollateralized interest rate and credit 
default  swap  liabilities  during  2017,  changes  in Ambac  credit 
spreads as much as 250 basis points would result in less than a $1 
million  impact  to  the  fair  value  of  derivatives  at  December 31, 
2017.

Ambac’s  fixed  income  investment  portfolio  contains  securities 
with  different  sensitivities  to  and  volatility  of  spreads.  Fixed 
income  securities  that  are  guaranteed  by  Ambac  and  were 
purchased in Ambac's investment portfolio have credit spread risk 
characteristics that behave inversely to those associated with future 
financial guarantee claim payments.  Accordingly such securities 
are excluded from the company's spread sensitivity measures.  The 
following table summarizes the estimated change in fair values of 
Ambac’s fixed income investment portfolio assuming immediate 
shifts  in  credit  spreads  across  all  holdings  other  than  Ambac 
guaranteed securities at December 31, 2017.  It is more likely that 
actual changes in credit spreads will vary by security: 

($ in millions)

Estimated change in fair value

Estimated fair value

Change in Spreads

250 basis point
widening

50 basis point
widening

Base scenario

50 basis point
narrowing

250 basis point
narrowing

$

$

(149)

2,596

(30)

2,715

—

2,745

31

2,776

84

2,829

| Ambac Financial Group, Inc.   72   2017 FORM 10-K |

Foreign Currency Risk:

Ambac has financial instruments denominated in currencies other 
than the U.S. dollar, primarily pounds sterling and euros. These 
financial instruments are primarily invested assets of Ambac UK 

and credit derivative contracts. The following table summarizes 
the estimated net change in fair value of these financial instruments 
assuming immediate shifts in spot foreign exchange rates to U.S. 
dollars as of December 31, 2017.

($ in millions)

Estimated change in fair value

Change in Foreign Exchange Rates Against U.S. Dollar

20% Decrease

10% Decrease

10% Increase

20% Increase

$

(67) $

(34) $

34

$

67

| Ambac Financial Group, Inc.   73   2017 FORM 10-K |

Item 8.  

Financial Statements and Supplementary Data

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Reports of Independent Registered Public Accounting Firm ..............................................................................................................
Consolidated Balance Sheets...............................................................................................................................................................
Consolidated Statements of Total Comprehensive Income (Loss)......................................................................................................
Consolidated Statements of Stockholders’ Equity...............................................................................................................................
Consolidated Statements of Cash Flows..............................................................................................................................................
Notes to Consolidated Financial Statements

Note 1. Background and Business Description.................................................................................................................................
Note 2. Basis of Presentation and Significant Accounting Policies..................................................................................................
Note 3. Special Purpose Entities, Including Variable Interest Entities .............................................................................................
Note 4. Comprehensive Income........................................................................................................................................................
Note 5. Net Income Per Share...........................................................................................................................................................
Note 6. Financial Guarantees in Force..............................................................................................................................................
Note 7. Financial Guarantee Insurance Contracts.............................................................................................................................
Note 8. Insurance Regulatory Restrictions .......................................................................................................................................
Note 9. Fair Value Measurements.....................................................................................................................................................
Note 10. Investments.........................................................................................................................................................................
Note 11. Derivative Instruments .......................................................................................................................................................
Note 12. Loans ..................................................................................................................................................................................
Note 13. Long-term Debt ..................................................................................................................................................................
Note 14. Income Taxes......................................................................................................................................................................
Note 15. Employment Benefit Plans.................................................................................................................................................
Note 16. Commitments and Contingencies.......................................................................................................................................
Note 17. Subsequent Events..............................................................................................................................................................
Note 18. Quarterly Information (Unaudited) ....................................................................................................................................

Page
75
77
78
79
80

81
85
98
103
104
104
106
113
116
128
134
136
136
138
141
145
155
156

| Ambac Financial Group, Inc.   74   2017 FORM 10-K |

Report of Independent Registered Public Accounting Firm

The the Stockholders and Board of Directors
Ambac Financial Group, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Ambac Financial Group, Inc. and subsidiaries' (the Company) internal control over financial reporting as of December 31, 
2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations 
of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial 
reporting as of December 31, 2017, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee 
of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 
consolidated balance sheets of the Company as of December 31, 2017 and 2016, the related consolidated statements of total comprehensive 
income (loss), stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2017, and the related 
notes and financial statement schedules (collectively, the consolidated financial statements), and our report dated February 28, 2018 expressed 
an unqualified opinion on those consolidated financial statements.

Basis for Opinion 

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the 
effectiveness  of  internal  control  over  financial  reporting,  included  in  the  accompanying  Management’s  Report  on  Internal  Control  over 
Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. 
We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance 
with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain 
reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit of 
internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk 
that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed 
risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit 
provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting 

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial 
reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A 
company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, 
in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance 
that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting 
principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and 
directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or 
disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any 
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or 
that the degree of compliance with the policies or procedures may deteriorate.

/s/ KPMG LLP

New York, New York
February 28, 2018

| Ambac Financial Group, Inc.   75   2017 FORM 10-K |

Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors
Ambac Financial Group, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Ambac Financial Group, Inc. and subsidiaries (the Company) as of December 
31, 2017 and 2016, the related consolidated statements of total comprehensive income (loss), stockholders’ equity, and cash flows for each of 
the  years  in  the  three-year  period  ended  December 31,  2017,  and  the  related  notes  and  financial  statement  schedules  (collectively,  the 
consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial 
position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the years in the 
three-year period ended December 31, 2017, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 
Company’s internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control - Integrated 
Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 28, 
2018 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on 
these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to 
be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of 
the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain 
reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our 
audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to 
error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding 
the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and 
significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe 
that our audits provide a reasonable basis for our opinion.

/s/ KPMG LLP

We have served as the Company’s auditor since 1985.

New York, New York
February 28, 2018

| Ambac Financial Group, Inc.   76   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Consolidated Balance Sheets

(Dollars in thousands, except share data) December 31,

2017

2016

Assets:
Investments:

Fixed income securities, at fair value (amortized cost of $4,614,623 and $5,435,385)
Fixed income securities pledged as collateral, at fair value (amortized cost of $99,719 and $64,833)
Short-term investments, at fair value (amortized cost of $557,476 and $430,827)
Other investments (includes $396,689 and $420,304 at fair value)

Total investments
Cash and cash equivalents
Receivable for securities
Investment income due and accrued
Premium receivables
Reinsurance recoverable on paid and unpaid losses
Deferred ceded premium
Subrogation recoverable
Loans
Derivative assets
Current taxes
Insurance intangible asset
Other assets
Variable interest entity assets:

Fixed income securities, at fair value
Restricted cash
Loans, at fair value
Derivative assets
Other assets

Total assets
Liabilities and Stockholders’ Equity:
Liabilities:

Unearned premiums
Loss and loss expense reserves
Ceded premiums payable
Obligations under investment agreements
Deferred taxes
Current taxes
Long-term debt
Accrued interest payable
Derivative liabilities
Other liabilities
Payable for securities purchased
Variable interest entity liabilities:

Accrued interest payable
Long-term debt, at fair value
Derivative liabilities
Other liabilities

Total liabilities
Commitments and contingencies (See Note 16)
Stockholders’ equity:

Preferred stock, par value $0.01 per share; 20,000,000 shares authorized shares; issued and outstanding 

shares—none

Common stock, par value $0.01 per share; 130,000,000 shares authorized; issued and outstanding 

shares: 45,275,982 and 45,194,954

Additional paid-in capital
Accumulated other comprehensive income (loss)
Retained earnings
Treasury stock, shares at cost: 24,816 and 22,458

Total Ambac Financial Group, Inc. stockholders’ equity

Noncontrolling interest
Total stockholders’ equity
Total liabilities and stockholders’ equity

See accompanying Notes to Consolidated Financial Statements

$

$

$

$

$

$

$

4,652,172
99,719
557,270
431,630
5,740,791
623,703
11,177
16,532
586,312
40,997
52,195
631,213
10,358
73,199
11,803
846,973
46,614

2,914,145
978
11,529,384
54,877
1,123
23,192,374

783,155
4,745,015
37,876
—
33,659
—
991,696
436,984
82,782
67,583
1,932

589
12,160,544
2,205,264
37
21,547,116

—

453

199,560
(52,239)
1,233,845
(471)
1,381,148
264,110
1,645,258
23,192,374

$

5,554,215
64,905
430,788
450,307
6,500,215
91,025
2,090
26,023
661,337
30,418
69,624
684,731
4,160
77,742
—
962,080
158,423

2,622,566
4,873
10,658,963
80,407
1,025
22,635,702

967,258
4,380,769
42,529
82,358
1,720
14,280
1,114,405
421,975
319,286
76,589
1,084

859
11,155,936
2,078,601
29
20,657,678

—

452

195,267
(38,990)
1,557,681
(496)
1,713,914
264,110
1,978,024
22,635,702

| Ambac Financial Group, Inc.   77   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Consolidated Statements of Total Comprehensive Income (Loss)

(Dollars in thousands, except share data) Year Ended December 31,

2017

2016

2015

$

175,277

$

197,287

$

312,595

Revenues:

Net premiums earned

Net investment income:

Securities available-for-sale and short-term

Other investments

Total net investment income

Other-than-temporary impairment losses:

Total other-than-temporary impairment losses

Portion of other-than-temporary impairment recognized in other comprehensive 

income

Net other-than-temporary impairment losses recognized in earnings
Net realized investment gains (losses)
Change in fair value of credit derivatives:
Realized gains and other settlements
Unrealized gains (losses)

Net change in fair value of credit derivatives
Net gains (losses) on interest rate derivatives
Net realized gains (losses) on extinguishment of debt
Other income (expense)
Income (loss) on variable interest entities

Total revenues
Expenses:

Losses and loss expenses (benefit)
Insurance intangible amortization
Operating expenses
Interest expense
Goodwill impairment
Total expenses

Pre-tax income (loss)
Provision for income taxes
Net income (loss)
Less: net gain (loss) attributable to noncontrolling interest
Net income (loss) attributable to common shareholders
Other comprehensive income (loss), after tax:
Net income (loss)
Unrealized gains (losses) on securities, net of deferred income taxes of $0
Gains (losses) on foreign currency translation, net of deferred income taxes of $0
Changes to postretirement benefit, net of tax of $0
Total other comprehensive income (loss), net of tax
Total comprehensive income (loss)
Less: comprehensive (loss) gain attributable to the noncontrolling interest:

Net gain (loss)
Currency translation adjustments

Total comprehensive income (loss) attributable to Ambac Financial Group, Inc.
Net income (loss) attributable to Ambac Financial Group, Inc.  common 

shareholders
Basic
Diluted

See accompanying Notes to Consolidated Financial Statements

$

$

$

$
$

337,774

23,179

360,953

(54,625)

34,454

(20,171)
5,366

1,589
14,783
16,372
59,565
4,920
(706)
19,670
621,246

513,186
150,854
121,516
119,941
—
905,497
(284,251)
44,464
(328,715)
—
(328,715) $

(328,715) $
(81,520)
73,586
1,273
(6,661)
(335,376)

—
—
(335,376) $

281,049

32,318

313,367

(89,700)

67,881

(21,819)
39,284

912
19,194
20,106
(50,273)
4,845
17,445
(14,093)
506,149

(11,489)
174,608
113,660
124,344
—
401,123
105,026
30,709
74,317
(526)
74,843

74,317
67,900
(122,128)
23
(54,205)
20,112

(526)
—
20,638

(7.25) $
(7.25) $

1.66
1.64

$

$

$

$
$

249,337

16,952

266,289

(66,692)

41,033

(25,659)
53,476

2,785
38,916
41,701
(42,544)
81
7,150
31,569
644,658

(768,707)
169,557
102,702
116,537
514,511
134,600
510,058
17,364
492,694
(709)
493,403

492,694
(159,730)
(45,025)
(687)
(205,442)
287,252

(709)
(374)
288,335

10.92
10.72

| Ambac Financial Group, Inc.   78   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Consolidated Statements of Stockholders’ Equity

(Dollars in thousands)

Total

Ambac Financial Group, Inc.

Retained
Earnings

Accumulated
Other
Comprehensive
Income (Loss)

Preferred
Stock

Common
Stock

Additional
Paid-in
Capital

Common
Stock Held
in Treasury,
at Cost

Noncontrolling
Interest

Balance at January 1, 2017

$ 1,978,024

$ 1,557,681

$

(38,990) $

— $

452

$

195,267

$

(496) $

264,110

—

—

—

—

25

—

—

—

—

—

—

—

—
(471) $

—
264,110

(118) $

273,547

—

—

—

(378)

—

—

—

—
(496) $

(526)

(6,442)

—

—

—

—

(2,469)

—
264,110

(56) $

274,630

—

—

(62)

—

(1,083)

—

—

—

—
(118) $

—
273,547

$

$

$

$

$

Total comprehensive income

(335,376)

(328,715)

Adjustment to initially apply

ASU 2018-02

Adjustment to initially apply

ASU 2016-09

Stock-based compensation

Cost of shares (acquired) issued

under equity plan

Cost of warrants acquired

—

6,588

(137)

4,293

(137)

—

(1,547)

(1,572)

—

—

Issuance of common stock
1
Balance at December 31, 2017 $ 1,645,258

—
$ 1,233,845

Balance at January 1, 2016

$ 1,958,346

$ 1,478,439

(6,661)

(6,588)

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

4,293

—

—

—
(52,239) $

—
— $

1
453

—
199,560

$

15,215

$

— $

450

$

190,813

$

$

Total comprehensive income

20,112

74,843

(54,205)

—

—

—

—

—

2

—

—
452

$

$

—

—

5,253

—

(801)

—

—

2
195,267

189,138

—

3,105

—

(1,433)

3
190,813

Adjustment to initially apply 

ASU 2014-13

Stock-based compensation

Cost of shares (acquired) issued 

under equity plan

Cost of warrants acquired

Issuance of common stock

Deconsolidation of a variable 

interest entity

—

5,253

(505)

(2,717)

2

(2,469)

6,442

—

(127)

(1,916)

—

—

Warrants exercised
2
Balance at December 31, 2016 $ 1,978,024

—
$ 1,557,681

Balance at January 1, 2015

$ 1,673,735

$

989,290

$

$

—

—

—

—

—

—

—

—

—

—

—

—

—

—
(38,990) $

—
— $

220,283

$

— $

450

Total comprehensive income

Stock-based compensation

Cost of shares (acquired) issued 

under equity plan

Cost of warrants acquired

287,252

3,105

(374)

(5,375)

493,403

(205,068)

—

(312)

(3,942)

—

—

—

—

—

—

—

—

—

—

—

Warrants exercised
3
Balance at December 31, 2015 $ 1,958,346

—
$ 1,478,439

$

—
15,215

$

—
— $

—
450

$

See accompanying Notes to Consolidated Financial Statements

| Ambac Financial Group, Inc.   79   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Consolidated Statements of Cash Flows

2017

2016

2015

$

(328,715) $

74,843

$

(Dollars in thousands) Year Ended December 31,

Cash flows from operating activities:

Net income (loss) attributable to common shareholders

Noncontrolling interest in subsidiaries’ earnings

Net income (loss)

Adjustments to reconcile net income to net cash used in operating activities:

Depreciation and amortization

Impairment of goodwill

Amortization of bond premium and discount

Share-based compensation

Deferred income taxes

Current income taxes

Unearned premiums, net

Losses and loss expenses, net

Ceded premiums payable

Investment income due and accrued

Premium receivables

Accrued interest payable

Amortization of insurance intangible assets

Net mark-to-market (gains) losses

Net realized investment gains

Other-than-temporary impairment charges

(Gain) loss on extinguishment of debt

Variable interest entity activities

Derivative assets and liabilities

Other, net

Net cash provided by (used in) operating activities

Cash flows from investing activities:

Proceeds from sales of bonds

Proceeds from matured bonds

Purchases of bonds

Proceeds from sales of other invested assets

Purchases of other invested assets

Change in short-term investments

Loans, net

Change in cash collateral receivable

Other, net

Net cash provided by (used in) investing activities

Cash flows from financing activities:

Net proceeds received from a secured borrowing
Paydowns of a secured borrowing
Payments for investment agreement draws
Payments for extinguishment of long-term debt
Tax payments related to shares withheld for share-based compensation plans
Proceeds from warrant exercises
Cost of warrants acquired

Net cash used in financing activities

Effect of foreign exchange on cash and cash equivalents
Net cash flow

Cash and cash equivalents at beginning of period
Cash and cash equivalents end of period

See accompanying Notes to Consolidated Financial Statements

$

| Ambac Financial Group, Inc.   80   2017 FORM 10-K |

—

(328,715)

992

—

(182,997)

4,293

31,939

(26,272)

(168,208)

399,982

(4,653)

9,425

76,900

49,969

150,854

(14,783)

(5,366)

20,171

(4,920)

(19,670)

(223,247)

21,538
(212,768)

2,138,936

813,990

(2,053,693)

349,799

(299,424)

(126,891)

(6,198)

122,844

(10,594)
928,769

—
(28,992)
(82,358)
(69,499)
(1,268)
—
—
(182,117)

(1,206)
532,678

91,025
623,703

(526)

74,317

1,220

—

(150,061)

5,253

(485)

9,727

(289,140)

853,978

(10,965)

(750)

172,331

66,439

174,608

(19,194)

(39,284)

21,819

(4,845)

14,093

(7,625)

(27,896)
843,540

867,882

1,317,215

(2,574,285)

131,703

(281,570)

(206,002)

1,046

27,372

1,996
(714,643)

—
(29,482)
(17,964)
(19,550)
—
2
(2,717)
(69,711)

(3,905)
55,281

35,744
91,025

$

$

493,403

(709)

492,694

3,215

514,511

(129,584)

3,104

126

134

(372,907)

(799,399)

(6,942)

(280)

174,918

51,397

169,557

(38,916)

(53,476)

25,659

(81)

(31,569)

9,352

80,296
91,809

996,427

1,029,026

(2,374,441)

178,474

(128,186)

134,423

508

(6,833)

(5,143)
(175,745)

143,430
(13,533)
(63,872)
(13,752)
—
3
(5,375)
46,901

(1,124)
(38,159)

73,903
35,744

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

1. 

BACKGROUND AND BUSINESS DESCRIPTION

Background:

Ambac Financial Group, Inc. (“Ambac” or the “Company”), headquartered in New York City, is a financial services holding company that 
was incorporated in the state of Delaware on April 29, 1991. On May 1, 2013 (the “Reorganization Effective Date”), Ambac emerged from 
Chapter 11 bankruptcy protection when the Second Modified Fifth Amended Plan of Reorganization of Ambac Financial Group, Inc. (the 
“Reorganization Plan”) became effective. On December 26, 2013, the United States Bankruptcy Court for the Southern District of New York 
(the “Bankruptcy Court”) entered an order of final decree closing Ambac’s Chapter 11 case. Ambac filed a voluntary petition for relief under 
Chapter 11 of the United States Bankruptcy Code (the “Bankruptcy Code”) in the Bankruptcy Court on November 8, 2010 as a result of losses 
incurred since the beginning of the financial crisis in 2007.

As provided for in the Reorganization Plan, Ambac’s Amended and Restated Certificate of Incorporation and revised Bylaws became effective 
on the Reorganization Effective Date. Pursuant to the Amended and Restated Certificate of Incorporation of Ambac, Ambac is authorized to 
issue 150,000,000 shares of capital stock, consisting of 130,000,000 shares of common stock, par value $0.01 per share and 20,000,000 shares 
of preferred stock, par value $0.01 per share. Pursuant to the Reorganization Plan, Ambac distributed 45,000,000 shares of new common stock 
on May 1, 2013 and distributed warrants to holders of allowed general unsecured claims and subordinated debt securities, which as of the 
Reorganization Effective Date entitled such holders to acquire an additional 5,047,138 shares of new common stock of the Company at an 
exercise price of $16.67 per share at any time on or prior to April 30, 2023. The new common stock and warrants are listed on NASDAQ and 
trade under the symbols “AMBC” and “AMBCW,” respectively. All such common stock and warrants were issued without registration under 
the Securities Act of 1933, as amended or state securities laws, in reliance on Section 1145 of the United States Bankruptcy Code. The common 
stock of the Company in existence prior to the Reorganization Effective Date was cancelled on the Reorganization Effective Date. 

Ambac’s Amended and Restated Certificate of Incorporation limits voting and transfer rights of stockholders in significant ways. Article IV 
contains voting restrictions applicable to any person owning at least 10% of Ambac’s common stock so that such person (including any group 
consisting of such person and any other person with whom such person or any affiliate or associate of such person has any agreement, contract, 
arrangement or understanding with respect to acquiring, voting, holding or disposing of Ambac’s common stock) shall not be entitled to cast 
votes in excess of one vote less than 10% of the votes entitled to be cast by all common stock holders, except as otherwise approved by the 
Office of the Commissioner of Insurance for the State of Wisconsin (“OCI” (which term shall be understood to refer to such office as regulator 
of Ambac Assurance and to refer to the Commissioner of Insurance for the State of Wisconsin as rehabilitator of the Segregated Account (the 
“Rehabilitator”), as the context requires)).

There are substantial restrictions on the ability to transfer Ambac’s common stock set forth in Article XII of Ambac’s Amended and Restated 
Certificate of Incorporation. In order to preserve certain tax benefits, subject to limited exceptions, any attempted transfer of common stock 
shall be prohibited and void to the extent that, as a result of such transfer (or any series of transfers of which such transfer is a part), either 
(i) any person or group of persons shall become a holder of 5% or more of the Company’s common stock or (ii) the percentage stock ownership 
interest in Ambac of any holder of 5% or more of the Company’s common stock shall be increased (a “Prohibited Transfer”). These restrictions 
shall not apply to an attempted transfer if the transferor or the transferee obtains the written approval of Ambac’s Board of Directors to such 
transfer. A purported transferee of a Prohibited Transfer shall not be recognized as a stockholder of Ambac for any purpose whatsoever in 
respect of the securities which are the subject of the Prohibited Transfer (the “Excess Securities”). Until the Excess Securities are acquired by 
another person in a transfer that is not a Prohibited Transfer, the purported transferee of a Prohibited Transfer shall not be entitled with respect 
to such Excess Securities to any rights of stockholders of Ambac, including, without limitation, the right to vote such Excess Securities and 
to receive dividends or distributions, whether liquidating or otherwise, in respect thereof, if any. Once the Excess Securities have been acquired 
in a transfer that is not a Prohibited Transfer, the securities shall cease to be Excess Securities. If the Board determines that a transfer of 
securities constitutes a Prohibited Transfer then, upon written demand by Ambac, the purported transferee shall transfer or cause to be transferred 
any certificate or other evidence of ownership of the Excess Securities within the purported transferee’s possession or control, together with 
any distributions paid by Ambac with respect to such Excess Securities, to an agent designated by Ambac. Such agent shall thereafter sell such 
Excess Securities and the proceeds of such sale shall be distributed as set forth in the Amended and Restated Certificate of Incorporation. If 
the purported transferee of a Prohibited Transfer has resold the Excess Securities before receiving such demand, such person shall be deemed 
to have sold the Excess Securities for Ambac’s agent and shall be required to transfer to such agent the proceeds of such sale, which shall be 
distributed as set forth in the Amended and Restated Certificate of Incorporation. 

As of the Reorganization Effective Date, the Company was generally discharged and released from all pre-Reorganization Effective Date 
debts, liabilities, claims, causes of action and interests in accordance with the provisions of the Reorganization Plan. Holders of claims and 
equity interests are also generally barred from commencing or continuing any action or proceeding relating to such claims, causes of action 
or interests. The Reorganization Plan also provides for broad exculpation and releases of the Company, Ambac Assurance, the Segregated 
Account (as defined below), OCI, the Rehabilitator, the board of directors and board committees of the Company and Ambac Assurance, all 
individual directors, officers and employees of the Company and Ambac Assurance, the Creditors’ Committee and the individual members 
thereof, and each of the respective representatives of such parties, for actions or omissions that occurred on or prior to the Reorganization 
Effective Date. 

| Ambac Financial Group, Inc.   81   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Business Description:

Ambac’s provides financial guarantee insurance policies through its principal operating subsidiary, Ambac Assurance Corporation (“Ambac 
Assurance” or "AAC") and its wholly owned subsidiary, Ambac Assurance UK Limited (“Ambac UK”), both of which have been in runoff 
since 2008. Insurance policies issued by Ambac Assurance and Ambac UK generally guarantee payment when due of the principal and interest 
on the obligations guaranteed. Ambac Assurance also has another wholly-owned subsidiary, Everspan Financial Guarantee Corp. (“Everspan”), 
which has been in runoff since its acquisition in 1997.  Ambac Assurance’s ability to pay dividends and, as a result, Ambac’s liquidity, have 
been significantly restricted by the deterioration of Ambac Assurance's financial condition, by the rehabilitation of the Segregated Account 
(as defined below) and by the terms of the Settlement Agreement, dated as of June 7, 2010 (the "Settlement Agreement"), by and among 
Ambac Assurance, Ambac  Credit  Products  LLC  (“ACP”), Ambac  and  certain  counterparties  to  credit  default  swaps  with ACP  that  were 
guaranteed by Ambac Assurance. Ambac Assurance is also restricted in its ability to pay dividends pursuant to regulatory restrictions, the 
terms of its Auction Market Preferred Shares, and the terms of the Stipulation and Order (described below). It is highly unlikely that Ambac 
Assurance will be able to make dividend payments to Ambac for the foreseeable future. 

Ambac also provides other financial products through subsidiaries of Ambac Assurance. These products consist of  interest rate swaps, funding 
conduits and investment agreements (until the first quarter of 2017) that were provided principally to clients that were also provided  financial 
guarantee  policies. These financial products have been in active runoff since 2007.

Prior to the second quarter of 2017, Ambac had two reportable business segments: i) the financial guarantee segment, which consisted of 
financial guarantee insurance policies and credit derivative contracts and ii) the financial services segment which consisted of the other financial 
products discussed above. With respect to the financial services segment, there were significant swap commutations in June 2017. The remaining 
interest rate swaps, along with other interest rate derivatives, are managed to economically hedge interest rate risk in the financial guarantee 
and investment portfolios.  The last remaining investment agreement matured in March 2017 and the remaining conduit transactions are not 
material. The significant wind-down of these financial products, along with the appointment of a new Chief Executive Officer effective January 
1, 2017, has resulted in a change in how the Company manages its business. Management now reviews financial information, allocates resources 
and measures financial performance on a consolidated basis. As a result, beginning with the second quarter of 2017, the Company has a single 
reportable segment.  All prior period amounts and disclosures have been adjusted to reflect the reportable segment change.

In  February  2018, Ambac  achieved  one  of  its  key  strategic  priorities,  the  exit  from  rehabilitation  of  the  Segregated Account.   Having 
accomplished this milestone, Ambac will continue to pursue and prioritize its remaining key strategic priorities, namely:

•  Active  runoff  of  Ambac  Assurance  and  its  subsidiaries  through  transaction  terminations,  policy  commutations,  settlements  and 
restructurings, with a focus on our watch list credits and known and potential future adversely classified credits, that we believe will 
improve our risk profile, and maximizing the risk-adjusted return on invested assets; 

•  Ongoing rationalization of Ambac's and its subsidiaries' capital and liability structures; 

•  Loss recovery through active litigation management and exercise of contractual and legal rights; 

•  Ongoing review of organizational effectiveness and efficiency of the operating platform; and 

•  Evaluation of opportunities in certain business sectors that meet acceptable criteria that will generate long-term stockholder value with 

attractive risk-adjusted returns. 

With respect to our new business strategy, we have identified certain business sectors adjacent to Ambac's core business in which future 
opportunities will be evaluated.  The evaluation will be conducted through  a measured and disciplined approach to identify opportunities that 
are synergistic to Ambac, match Ambac's core competencies, are rapidly scalable or available through mergers and acquisitions and that may 
allow for the utilization of Ambac's net operating loss carry-forwards.  Although we are exploring new business opportunities, no assurance 
can be given that we will be able to execute, or obtain the financial and other resources that may be required to finance, the acquisition or 
development of any new businesses or assets. Furthermore, the execution of Ambac’s strategy to increase the value of its investment in Ambac 
Assurance is subject to the rights of OCI under the Stipulation and Order, which requires OCI to approve certain actions taken by or in respect 
of Ambac Assurance.  Opportunities for remediating losses on poorly performing insured transactions also depend on market conditions, 
including the perception of Ambac Assurance’s creditworthiness, the structure of the underlying risk and associated policy as well as other 
counterparty specific factors.  Decisions by  OCI could impair Ambac’s ability to execute certain of its strategies. Ambac Assurance's ability 
to commute policies or purchase certain investments may also be limited by available liquidity. Due to these factors, as well as uncertainties 
relating to the ability of Ambac Assurance to deliver value to Ambac, the value of our securities remains speculative.

The Segregated Account

In March 2010, Ambac Assurance established a Segregated Account pursuant to Wisc. Stat. §611.24 (2) (the “Segregated Account”) to segregate 
certain segments of Ambac Assurance’s liabilities, and OCI commenced rehabilitation proceedings in the Dane County, Wisconsin Circuit 
Court (the “Rehabilitation Court”) with respect to the Segregated Account (the “Segregated Account Rehabilitation Proceedings”) in order to 
permit OCI to facilitate an orderly run-off and/or settlement of the liabilities allocated to the Segregated Account pursuant to the provisions 

| Ambac Financial Group, Inc.   82   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

of the Wisconsin Insurers Rehabilitation and Liquidation Act.  On October 8, 2010, OCI filed a plan of rehabilitation for the Segregated 
Account (the “Segregated Account Rehabilitation Plan”) in the Rehabilitation Court. The Rehabilitation Court confirmed the Segregated 
Account Rehabilitation Plan on January 24, 2011. On June 11, 2014, the Rehabilitation Court approved amendments to the Segregated Account 
Rehabilitation Plan and the Segregated Account Rehabilitation Plan, as amended, became effective on June 12, 2014.  Net par exposure as of 
December 31, 2017 for policies allocated to the Segregated Account was $9,246,357.  Policy obligations not allocated to the Segregated 
Account remained in the General Account of Ambac Assurance, and such policies in the General Account were not subject to and, therefore, 
were not directly impacted by the Segregated Account Rehabilitation Plan.

Rehabilitation Exit Transactions

On July 19, 2017, Ambac Assurance and Ambac entered into an agreement (as amended as of September 21, 2017, the “Rehabilitation Exit 
Support Agreement”) with holders or beneficial owners (the “Supporting Holders”) of surplus notes issued by Ambac Assurance and beneficial 
interests in Deferred Amounts (as defined in the Segregated Account Rehabilitation Plan) of the Segregated Account with respect to a transaction 
which, subject to the conditions precedent set forth in the Rehabilitation Exit Support Agreement, and if consummated, would generally involve 
(i) the exchange of certain surplus notes held by holders of surplus notes that elect to participate in a voluntary exchange transaction and (ii) 
the satisfaction and discharge of all Deferred Amounts, in each case for an effective consideration package comprised of cash and new Secured 
Notes (as defined below) and certain existing surplus notes and (iii) the exit from rehabilitation of the Segregated Account and the merger of 
the Segregated Account with and into Ambac Assurance (the “Rehabilitation Exit Transactions”).

On September 25, 2017 the Rehabilitator filed a motion in the Rehabilitation Court seeking entry of an order approving an amendment to the 
Segregated Account Rehabilitation Plan (the "Second Amended Plan of Rehabilitation").  Following the conclusion of a Confirmation Hearing 
on January 22, 2018, the Rehabilitation Court entered an order granting the Rehabilitator's motion and confirming the Second Amended Plan 
of  Rehabilitation.  On  February  12,  2018  (the  "Effective  Date"),  the  Second Amended  Plan  of  Rehabilitation  became  effective  and  the 
Rehabilitation Exit Transactions were consummated.

The Rehabilitation Exit Transactions involved a series of transactions which provided holders of beneficial interests in Deferred Amounts 
(other than Ambac, but including Ambac Assurance) a total effective consideration package, in full satisfaction and discharge of each $1.00 
of Deferred Amounts (including accretion), of (i) $0.40  in cash, (ii) $0.41 in principal amount of new Secured Notes (as defined below) and 
(iii) from certain holders of surplus notes,  $0.125  currently outstanding surplus notes.  Such consideration package thereby provided a discount 
of $0.065 (applied first against accretion of Deferred Amounts). Ambac received  $0.91 in principal amount of Secured Notes for each $1.00
of Deferred Amounts (including accretion) that it held, and provided a $0.09 discount in full satisfaction and discharge of its Deferred Amount 
claims. 

In accordance with the Rehabilitation Exit Support Agreement, the Rehabilitation Exit Transactions also involved a series of interrelated 
transactions involving the exchange of certain surplus notes (collectively, the “Exchange Offers”), pursuant to which, for each  $1.00 of 
principal amount outstanding and accrued and unpaid interest thereon, holders effectively (i) received $0.40  in cash, (ii) received $0.41 in 
principal amount of Secured Notes, (iii) retained $0.125 in principal amount and accrued and unpaid interest thereon of surplus notes and (iv) 
provided a discount of  $0.065 in principal amount and accrued and unpaid interest thereon. Ambac did not participate in the Exchange Offers.  
An aggregate of 99.6% of the surplus notes held by the Supporting Holders and parties other than Ambac and Ambac Assurance participated 
both in the Rehabilitation Exit Transactions and in the Exchange Offers.

As part of the Rehabilitation Exit Transactions, Ambac and Ambac Assurance received consents from holders of surplus notes to a waiver and 
amendment (the “BSA Waiver and Amendment”) of certain provisions of the Settlement Agreement.  The BSA Waiver and Amendment 
included a waiver of compliance with any and all restrictions, limitations and other provisions set forth in Section 3.04 of the Settlement 
Agreement that could have directly or indirectly prohibited, restricted or limited in any manner the consummation or effectiveness of the 
Rehabilitation Exit Transactions regardless of whether such a waiver was actually required in order to consummate or effect such transactions. 
Among  other  provisions,  the  BSA  Waiver  and Amendment  also  includes  amendments  to  the  Settlement Agreement  that  eliminate  the 
requirement for Ambac Assurance to have Unaffiliated Qualified Directors on its Board of Directors; eliminate the prohibition on new business; 
modify the restrictions on the incurrence of indebtedness and other material obligations; modify the restrictions on liens securing permitted 
indebtedness; modify restrictions applicable to junior surplus notes; and modify restrictions on mergers or similar transactions.  After giving 
effect  to  the  BSA  Waiver  and Amendment,  the  Settlement Agreement  continues  to  limit  certain  activities  of Ambac Assurance  and  its 
subsidiaries, such as issuing indebtedness; engaging in mergers and similar transactions; disposing of assets; making restricted payments; 
creating or permitting liens; engaging in transactions with affiliates; modifying or creating tax sharing agreements; and taking certain actions 
with respect to surplus notes (among other restrictions and limitations).  The Settlement Agreement includes certain allowances with respect 
to these activities and generally requires the approval of OCI and, in some cases, holders of surplus notes issued pursuant to the Settlement 
Agreement, for consents, waivers or amendments.

As contemplated by the Rehabilitation Exit Support Agreement and as a portion of the consideration received by holders of beneficial interests 
in Deferred Amounts (including Ambac Assurance) in satisfaction and discharge of their claims pursuant to the Second Amended Plan of 
Rehabilitation and by holders of surplus notes pursuant to the Exchange Offers (as specified above), a newly formed special purpose entity 
(Ambac LSNI, LLC) issued new secured notes (the “Secured Notes”), secured by all assets of the special purpose entity, which include a note 
issued by Ambac Assurance to the special purpose entity (the "Ambac Note"), which note is secured by a pledge of Ambac Assurance’s right, 

| Ambac Financial Group, Inc.   83   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

title and interest in up to the first $1,400,000 of proceeds (net of reinsurance) from certain litigations in which Ambac Assurance seeks redress 
for breaches of representations and warranties and/or fraud related to residential mortgage-backed securitizations (the “RMBS Litigations”). 
In addition, the Ambac Note is secured by securities having a market value of approximately $350,000.  Ambac Assurance also pledged for 
the benefit of the holders of Secured Notes (other than Ambac Assurance) the proceeds of the Secured Notes held by Ambac Assurance from 
time to time, and issued a financial guaranty insurance policy to a trustee for the benefit of holders of Secured Notes irrevocably guarantying 
all principal and interest payments in respect of the Secured Notes as and when such payments become due and owing. 

Until the earlier of (i) June 8, 2020 and (ii) the date on which at least 25% of the principal amount of surplus notes (other than junior surplus 
notes) are no longer outstanding, Ambac has agreed to hold and not sell surplus notes (other than junior surplus notes) which, as of June 30, 
2017, have an aggregate of $60,000 of principal amount and accrued and unpaid interest outstanding.

In connection with the Rehabilitation Exit Transactions, certain documents and instruments relating to the operation of the Segregated Account 
or the rights of the Segregated Account and the Rehabilitator were terminated, including the Plan of Operation for the Segregated Account; 
the Secured Note issued by Ambac Assurance to the Segregated Account; the Aggregate Excess of Loss Reinsurance Agreement between 
Ambac Assurance,  as  reinsurer,  and  the  Segregated Account;  the  Management  Services Agreement  between Ambac Assurance  and  the 
Segregated Account; the Cooperation Agreement among Ambac Assurance, Ambac, the Segregated Account and the Rehabilitator; and the 
Mediation Agreement dated September 21, 2011 among Ambac, Ambac Assurance, the Segregated Account, the Rehabilitator, OCI and the 
official committee of unsecured creditors of Ambac.

Surplus Note Interest Payment

In connection with the consummation of the Rehabilitation Exit Transactions, Ambac Assurance received the approval of the OCI to make a 
one-time current interest payment of $13,501 on the surplus notes (other than junior surplus notes) outstanding immediately following the 
Effective Date.  On February 12, Ambac Assurance notified the fiscal agent for the surplus notes that the record date for such interest payment 
would be February 28, 2018 and the payment date would be March 1, 2018.

Tier 2 Financing

On the Effective Date, Ambac Assurance issued $240,000 of senior notes (the “Tier 2 Notes”) secured by Ambac Assurance’s rights, title and 
interest in the cash and non-cash proceeds (net of reinsurance) above $1,600,000 received in connection with the RMBS Litigations. 

Following the consummation of the Rehabilitation Exit Transactions, Ambac Assurance will seek to further improve its financial condition 
by continuing to pursue asset monetizations; loss recoveries; restructurings, purchases, modifications or exchanges of certain outstanding 
obligations; extinguishment or modification of certain contractual restrictions; and/or commuting or reducing insured exposures.  Separately 
from or in connection with the actions described above, we may seek to further optimize our capital and corporate structure to unlock shareholder 
value.

Stipulation and Order

A Stipulation and Order, the terms of which were agreed between OCI, Ambac and Ambac Assurance, became effective upon the Effective 
Date (the "Stipulation and Order") and provides as follows:

•  Ambac Assurance shall maintain a level of surplus and contingency reserves as regards policyholders which provides reasonable security 
against  contingencies  affecting  its  financial  position  that  are  not  otherwise  fully  covered  by  reserves  or  reinsurance,  such  that  the 
Commissioner may continue to determine that Ambac Assurance’s surplus and contingency reserves are reasonably in excess of a level 
that would constitute a financially hazardous condition.  

•  Statutory surplus may not reflect the benefit of any reserve discounting, except to the extent approved by the Commissioner.

•  Ambac Assurance may not enter any transactions with affiliates, including the payment of a dividend or other distribution, without the 

approval of the Commissioner, subject to limited exceptions.

•  Ambac Assurance may not change its business plan or that of Everspan, including but not limited to the writing of new business, unless 

approved by the Commissioner. 

•  Ambac Assurance must obtain OCI approval with respect to the exercise of certain control rights in connection with policies that had 

been allocated to the Segregated Account. 

•  Ambac Assurance must obtain OCI approval with respect to any transaction Ambac Assurance proposes to enter into other than in ordinary 
course of business with non-affiliated counterparties where the aggregate consideration to be paid by Ambac Assurance is equal to or 
greater than $100,000.

•  Ambac Assurance must obtain OCI approval for any change to its Investment Policy or Derivative Use Plan.

•  Ambac Assurance must provide OCI with a monthly report of financial information, the scope of which is to be determined.  

| Ambac Financial Group, Inc.   84   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

•  Ambac Assurance  shall  provide,  and Ambac  shall  also  provide,  notice  to  the  Commissioner  within  ten  (10)  days  of  receipt  of  any 
communication  from  any  governmental  authority,  government-sponsored  enterprise,  or  lender  to Ambac Assurance, Ambac,  or  any 
affiliates which pertains to a circumstance, event or issue which would be reasonably likely to have a material adverse effect on the 
financial condition or operations of Ambac Assurance and its subsidiaries taken as whole.

•  Ambac Assurance shall provide notice as soon as practicable of any development in any litigation, including any delay in RMBS litigation, 
involving Ambac Assurance or any affiliate of Ambac Assurance which would or would be reasonably likely to have a material adverse 
effect on Ambac Assurance.

•  Ambac Assurance shall provide notice to the Commissioner of the occurrence, or failure to occur, of any event which would or would 
be reasonably likely to cause a material adverse effect to the business, assets, properties, operations, or condition, financial or otherwise, 
or, insofar as can reasonably be foreseen, prospects, financial or otherwise, of Ambac Assurance, an affiliate of Ambac Assurance, or 
Ambac Assurance and all affiliates taken as a whole.  A material adverse effect shall be conclusively presumed if the effect results, or 
reasonably could result, in a reduction of more than 10% in Ambac Assurance’s surplus as regards policyholders.

•  Ambac Assurance shall disclose, and Ambac shall disclose, to the Commissioner any instance of fraud or any significant change to the 

internal control environment incurred by Ambac Assurance, any of its subsidiaries, or Ambac.

•  If Ambac Assurance proposes to make any changes in the assumptions or vendors utilized in determining statutory loss reserves from 
the prior year’s statutory loss reserves which would cause the difference (whether positive or negative) between (a) Ambac Assurance’s 
statutory reserves determined with such proposed changes and (b) Ambac Assurance’s statutory reserves determined without such proposed 
changes to exceed the lesser of (i) $200,000 or (ii) 10% of Ambac Assurance’s statutory loss reserves without such proposed changes, 
Ambac Assurance shall notify the Commissioner.

•  Ambac shall use its best efforts to preserve use of net operating loss carry-forwards for the benefit of Ambac Assurance and its subsidiaries, 
including but not limited to, refraining from taking any action that would result in, and taking such affirmative steps as are appropriate 
to avoid, any deconsolidation event. 

•  Ambac shall provide the Commissioner and Ambac Assurance its full cooperation in relation to any issues that Ambac Assurance or its 
subsidiaries may have relative to the United States Internal Revenue Service, including efforts to obtain a private letter ruling, pre-filing 
agreement, or other form of guidance or clarification.

The Commissioner reserves the right to modify or terminate the Stipulation and Order in a manner consistent with the interests of policyholders, 
creditors and the public generally, and recognizes that Ambac Assurance may request the Commissioner to do so periodically as conditions 
warrant.

2. 

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES 

Ambac’s consolidated financial statements have been prepared on the basis of U.S. generally accepted accounting principles (“GAAP”). The 
preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported 
amounts  of  assets,  liabilities,  revenues,  expenses  and  disclosures  of  contingent  assets  and  liabilities.  Such  estimates  that  are  particularly 
susceptible to change are used in connection with certain fair value measurements, the evaluation of other than temporary impairments on 
investments, loss reserves for non-derivative insurance policies or valuation allowance on the deferred tax asset, any of which individually 
could be material. 

Consolidation: 

The consolidated financial statements include the accounts of Ambac and all other entities in which Ambac (directly or through its subsidiaries) 
has a controlling financial interest, including variable interest entities (“VIEs”) for which Ambac or an Ambac subsidiary is deemed the primary 
beneficiary in accordance with the Consolidation Topic of the Accounting Standards Codification ("ASC"). All significant intercompany 
balances have been eliminated. The usual condition for a controlling financial interest is ownership of a majority of the voting interests of an 
entity. However, a controlling financial interest may also exist in entities, such as VIEs, through arrangements that do not involve controlling 
voting interests.  A VIE is an entity: a) that lacks enough equity investment at risk to permit the entity to finance its activities without additional 
subordinated financial support from other parties; or b) where the group of equity holders does not have: (1) the power, through voting rights 
or similar rights, to direct the activities of an entity that most significantly impact the entity’s economic performance; (2) the obligation to 
absorb the entity’s expected losses; or (3) the right to receive the entity’s expected residual returns. The determination of whether a variable 
interest holder is the primary beneficiary involves performing a qualitative analysis of the VIE that includes, among other factors, its capital 
structure, contractual terms including the rights of each variable interest holder, the activities of the VIE, whether the variable interest holder 
has the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance, whether the variable interest 
holder has the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the 
VIE that could potentially be significant to the VIE, related party relationships and the design of the VIE. An entity that is deemed the primary 
beneficiary of a VIE is required to consolidate the VIE.  Refer to Note 3. Special Purpose Entities, Including Variable Interest Entities, for a 

| Ambac Financial Group, Inc.   85   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

detailed discussion of Ambac’s involvement in VIEs, Ambac’s methodology for determining whether Ambac is required to consolidate a VIE 
and the effects of VIEs being consolidated. 

Ambac Unconsolidated Financial Information: 

Financial information of Ambac is presented in Schedule II to this Form 10-K as of December 31, 2017 and 2016 and for the years ended 
December 31, 2017, 2016 and 2015. Investments in subsidiaries are accounted for using the equity method of accounting. 

Investments: 

The Investments - Debt and Equity Securities Topic of the ASC requires that all debt instruments and certain equity instruments be classified 
in Ambac’s Consolidated Balance Sheets according to their purpose and, depending on that classification, be carried at either cost or fair 
market value. Ambac’s non-VIE investment portfolio is accounted for on a trade-date basis and consists primarily of investments in fixed 
income securities that are considered available-for-sale as defined by the Investments - Debt and Equity Securities Topic of the ASC. Available-
for-sale securities are reported in the financial statements at fair value with unrealized gains and losses, net of deferred taxes, reflected in 
Accumulated Other Comprehensive Income in Stockholders’ Equity and computed using amortized cost as the basis. For purposes of computing 
amortized cost, premiums and discounts are accounted for using the effective interest method over the remaining term of the securities. For 
structured securities with a large underlying pool of homogenous loans, such as mortgage-backed and asset-backed securities, premiums and 
discounts  are adjusted for the effects of actual and anticipated prepayments on a retrospective basis. For other fixed income securities, such 
as corporate and municipal bonds, premiums and discounts are amortized or accreted over the remaining term of the securities even if they 
are callable. 

Ambac’s non-VIE investment portfolio also includes equity interests in pooled investment funds. Such equity interests in the form of common 
stock or in-substance common stock are classified as trading securities. Equity interests in pooled funds organized as limited liability companies 
are recorded under the fair value option in accordance with the Financial Instruments Topic of the ASC.  Investments classified either as trading 
or fair value option securities are reported as Other investments on the Consolidated Balance Sheet at fair value with changes in fair value 
reported through Net investment income on the Statement of Comprehensive Income. Investments in pooled funds have been classified as 
trading or fair value option securities so that any undistributed earnings of the funds may be reflected in Net investment income as they occur. 

Fair value is based primarily on quotes obtained from independent market sources. When quotes are not available or cannot be reasonably 
corroborated, valuation models are used to estimate fair value. These models include estimates, made by management, which utilize current 
market information. The quotes received or modeled valuations could differ materially from amounts that would actually be realized in the 
market. Realized gains and losses on the sale of investments are determined on the basis of specific identification. 

VIE investments in fixed income securities are carried at fair value under the fair value option. For additional information about VIE investments, 
including fair value by asset-type, see Note 3. Special Purpose Entities, Including Variable Interest Entities. 

Ambac has a formal impairment review process for fixed income available for sale securities in its investment portfolio. Ambac conducts a 
review each quarter to identify and evaluate investments that have indications of impairment that may be other than temporary in accordance 
with the Investments - Debt and Equity Securities Topic of the ASC. Factors considered to identify and assess securities for other than temporary 
impairment include: (i) fair values that have declined by 20% or more below amortized cost; (ii) market values that have declined by 5% or 
more but less than 20% below amortized cost for a continuous period of at least six months; (iii) recent downgrades by rating agencies; (iv) the 
financial condition of the issuer and financial guarantor, as applicable, and an analysis of projected defaults on the underlying collateral; 
(v) scheduled interest payments are past due; (vi) whether Ambac has the intent to sell the security; and (vii) whether it is more likely than 
not that Ambac will be required to sell a security  before the anticipated recovery of its amortized cost basis. If we believe a decline in the fair 
value of a particular investment is temporary, we record the decline as an unrealized loss net of tax in Accumulated Other Comprehensive 
Income in Stockholders’ Equity on our Consolidated Balance Sheets. If management either: (i) has the intent to sell its investment in a debt 
security or (ii) determines that the Company more likely than not will be required to sell the debt security before its anticipated recovery of 
the amortized cost basis less any current period credit impairment, then an other-than-temporary impairment charge is recognized in earnings, 
with the amortized cost of the security being written-down to fair value. If these conditions are not met, but it is determined that a credit loss 
exists, the credit impairment loss is recognized in earnings, and the other-than-temporary amount related to all other factors is recognized in 
other comprehensive income. For fixed income securities that have other-than-temporary impairments in a period, the previous amortized cost 
of the security less the amount of the other-than-temporary impairment recorded through earnings becomes the investment’s new cost basis. 
Ambac accretes the new cost basis to par or to the estimated future cash flows to be recovered over the expected remaining life of the security. 

The evaluation of securities for impairment is a quantitative and qualitative process, which is subject to risks and uncertainties and is intended 
to determine whether, and to what extent, declines in the fair value of investments should be recognized in current period earnings. The risks 
and uncertainties include changes in general economic conditions, the issuer’s or guarantor’s financial condition and/or future prospects, the 
impact of regulatory actions on the investment portfolio, the performance of the underlying collateral, the effects of changes in interest rates 
or credit spreads and the expected recovery period.  With respect to Ambac insured securities owned, future cash flows used to measure credit 
impairment represents the sum of (i) the bond’s intrinsic cash flows and (ii) the estimated Ambac Assurance claim payments. For Ambac-
insured securities owned and guaranteed under policies that were allocated to the Segregated Account, the estimate of Ambac Assurance claim 
payments included interest on Deferred Amounts, which were discharged on February 12, 2018. Ambac estimated the timing of claim payment 

| Ambac Financial Group, Inc.   86   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

receipts on all Ambac-insured securities owned, but the actual timing of such amounts for Segregated Account securities was at the sole 
discretion of the Rehabilitator. Refer to Note 1. Background and Business Description for more information on the Segregated Account and 
the Segregated Account Rehabilitation Proceedings. Ambac’s assessment about whether a decline in value is other-than-temporary reflects 
management’s current judgment regarding facts and circumstances specific to a security and the factors noted above, including Ambac's 
intention to sell securities and ability to hold temporarily impaired securities until recovery. If that judgment changes, Ambac may ultimately 
record a charge for other-than-temporary impairment in future periods.

Net Premiums: 

Gross premiums are received either upfront or in installments. For premiums received upfront, an unearned premium revenue (“UPR”) liability 
is established, which is initially recorded as the cash amount received. For installment premium transactions, a premium receivable asset and 
offsetting UPR liability is initially established in an amount equal to: (i) the present value of future contractual premiums due (the “contractual” 
method) or (ii) if the underlying insured obligation is a homogenous pool of assets which are contractually prepayable, the present value of 
premiums to be collected over the expected life of the transaction (the “expected” method). An appropriate risk-free rate corresponding to the 
weighted average life of each policy and currency is used to discount the future premiums contractually due or expected to be collected. For 
example, U.S. dollar exposures are discounted using U.S. Treasury rates while exposures denominated in a foreign currency are discounted 
using the appropriate risk-free rate for the respective currency. The weighted average risk-free rate at December 31, 2017 and 2016, was 2.5%. 
and 2.6%, respectively, and the weighted average period of future premiums used to estimate the premium receivable at December 31, 2017 
and 2016, was 9.8 years and 9.0 years, respectively.

Insured obligations consisting of homogeneous pools for which Ambac uses expected future premiums to estimate the premium receivable 
and UPR include residential mortgage-backed securities. As prepayment assumptions change for homogenous pool transactions, or if there is 
an actual prepayment for a “contractual” method installment transaction, the related premium receivable and UPR are adjusted in equal and 
offsetting amounts with no immediate effect on earnings using new premium cash flows and the then current risk-free rate corresponding to 
the initial weighted average life of the related policy.

For both upfront and installment premium policies, premium revenues are earned over the life of the financial guarantee contract in proportion 
to the insured principal amount outstanding at each reporting date (referred to as the level-yield method). For installment paying policies, the 
premium receivable discount, equating to the difference between the undiscounted future installment premiums and the present value of future 
installment premiums, is accreted as premiums earned in proportion to the premium receivable balance at each reporting date. 

Similar to gross premiums, premiums ceded to reinsurers are paid either upfront or in installments. For premiums paid upfront, a deferred 
ceded premium asset is established which is initially recorded as the cash amount paid. For installment premiums, a ceded installment premiums 
payable liability and offsetting deferred ceded premium asset are initially established in an amount equal to: i) the present value of future 
contractual premiums due or ii) if the underlying insured obligation is a homogenous pool of assets which are contractually pre-payable, the 
present value of expected premiums to be paid over the life of the transaction. An appropriate risk-free rate corresponding to the weighted 
average life of each policy and exposure currency is used to discount the future premiums contractually due or expected to be collected. 
Premiums ceded to reinsurers reduce the amount of premiums earned by Ambac from its financial guarantee insurance policies. For both 
upfront and installment premiums, ceded premiums written are primarily recognized in earnings in proportion to and at the same time as the 
related gross premium revenue is recognized. For premiums paid to reinsurers on an installment basis, Ambac records the present value of 
future ceding commissions as an offset to ceded premiums payable, using the same assumptions noted above for installment premiums. 

When a bond issue insured by Ambac has been retired early, typically due to an issuer call, any remaining UPR is recognized at that time to 
the extent the financial guarantee contract is legally extinguished, causing accelerated premium revenue. For installment premium paying 
transactions, we offset the recognition of any remaining UPR by the reduction of the related premium receivable to zero (as it will not be 
collected as a result of the retirement), which may cause negative accelerated premium revenue. Certain obligations insured by Ambac have 
been legally defeased whereby government securities are purchased by the issuer with the proceeds of a new bond issuance, or less frequently 
with other funds of the issuer, and held in escrow. The principal and interest received from the escrowed securities are then used to retire the 
Ambac-insured obligations at a future date either to their maturity date (a refunding) or a specified call date (a pre-refunding). Ambac has 
evaluated the provisions in policies issued on these obligations and determined those insurance policies have not been legally extinguished.  
For policies with refunding securities, premium revenue recognition is not impacted as the escrowed maturity date is the same as the previous 
legal maturity date.  For policies with pre-refunding securities, the maturity date of the pre-refunded security has been shortened from its 
previous legal maturity.  Although premium revenue recognition has not been accelerated in the period of the pre-refunding, it results in an 
increase in the rate at which the policy's remaining UPR is to be recognized.

Loans: 

Loans are reported at either their outstanding principal balance less unamortized discount or at fair value. For loans reported at their outstanding 
principal balance less unamortized discount (non-VIE loans), interest income is earned using the effective interest method based upon interest 
accrued on the unpaid principal balance adjusted for accretion of discounts.  A loan is considered impaired when, based on the financial 
condition of the borrower, it is probable that Ambac will be unable to collect all principal and interest due according to the contractual terms 
of the loan agreement. Loans held by VIEs consolidated as required under the Consolidation Topic of the ASC are carried at fair value, with 
changes in fair value recorded in Income (loss) on variable interest entities on the Consolidated Statements of Total Comprehensive Income. 

| Ambac Financial Group, Inc.   87   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Derivative Contracts: 

The Company has entered into derivative contracts both for trading purposes and to hedge certain economic risks inherent in its financial asset 
and liability portfolios.  None of Ambac’s derivative contracts are designated as hedges under the Derivatives and Hedging Topic of the ASC.  
Ambac's derivatives consist primarily of credit derivatives, interest rate swaps and futures contracts.  Ambac’s credit derivative contracts are 
accounted for at fair value since they do not qualify for the financial guarantee scope exception under the Derivatives and Hedging Topic of 
the ASC. Changes in fair value of credit derivatives are recorded in Net change in fair value of credit derivatives on the Consolidated Statements 
of Total Comprehensive Income.  Ambac maintains a derivatives portfolio consisting primarily of interest rate swaps and futures contracts to 
economically hedge interest rate risk in the financial guarantee and investment portfolios.  This portfolio also includes legacy interest rate 
swaps with asset-backed securitization issuers, states, municipalities and their authorities which were written in connection with their financings.  
Changes in fair value of all interest rate derivatives are recorded in net gains (losses) on interest rate derivatives on the Consolidated Statements 
of Total Comprehensive Income. VIEs consolidated under the Consolidation Topic of the ASC entered into derivative contracts to meet specified 
purposes within their securitization structure. Changes in fair value of consolidated VIE derivatives are included within Income (loss) on 
variable interest entities on the Consolidated Statements of Total Comprehensive Income. 

All derivatives are recorded on the Consolidated Balance Sheets at fair value on a gross basis; assets and liabilities are netted by counterparty 
only when a legal right of offset exists. Ambac has determined that the amounts recognized for the right to reclaim cash collateral or the 
obligation to return cash collateral may not be used to offset amounts due under the derivative instruments in the normal course of settlement. 
Therefore, such amounts are not offset against fair value amounts recognized for derivative instruments executed with the same counterparty 
under the same master netting arrangement. Effective January 3, 2017,  as a result of rule changes by the central clearing party ("CCP"), 
variation payments are considered settlements of the associated derivative balance and are reflected as a reduction to derivative liabilities on 
the Consolidated Balance Sheet at December 31, 2017.  For periods presented prior to this rule change, variation payments were included in 
"Other assets" on the Consolidated Balance Sheet.  Refer to Note 11. Derivative Instruments for further discussion of the Company’s use of 
derivative instruments and their impact of the consolidated financial statements, including details of the CCP rule change. Refer to Note 9. 
Fair Value Measurements for further description of the methodologies used to determine the fair value of derivative contracts, including model 
inputs and assumptions where applicable. 

Goodwill: 

Under the Reorganization Topic of the ASC, the Company determined that fresh start financial statement reporting was to be applied upon 
our emergence from Chapter 11 because (i) the reorganization value of the emerging entity was less than total post-petition liabilities and 
allowed claims, and (ii) the holders of existing voting shares immediately before the confirmation of the Reorganization Plan received less 
than 50% of the voting shares of the emerging entity. Specifically, fresh start reporting was applied upon confirmation of the Reorganization 
Plan by the Bankruptcy Court and the satisfaction of the remaining material contingencies necessary to complete implementation of the 
Reorganization Plan. All conditions required for the adoption of fresh start reporting were satisfied by the Company on April 30, 2013 (“Fresh 
Start Reporting Date”) when Ambac executed a closing agreement with the United States Internal Revenue Service (the "IRS") to conclude 
the settlement of a dispute.  As such, fresh start financial statement reporting ("Fresh Start") was adopted by the Company on April 30, 2013, 
incorporating, among other things, the discharge of debt obligations, issuance of new common stock and fair value adjustments. At the Fresh 
Start Reporting Date, we revalued our assets and liabilities to current estimated fair value. The excess reorganization value which could not 
be attributed to the fair value of specific identified tangible and intangible assets ("fair value of net assets") was recorded as goodwill. Pursuant 
to the Intangibles - Goodwill and Other Topic of the ASC, goodwill is not amortized but is subject to annual impairment testing. 

We tested goodwill for impairment as of October 1st of each year. Goodwill is also tested more frequently if indicators of impairment exist 
for each reporting unit. During the third quarter of 2015, Ambac determined sufficient indicators of potential impairment existed to perform 
an interim goodwill impairment evaluation for the reporting unit to which goodwill was assigned. Those indicators included the trading values 
of Ambac stock and changes in Ambac credit spreads.  In conducting the goodwill impairment analysis, we performed step one of the goodwill 
impairment test where we estimated the fair value of the reporting unit using a market approach, which was derived using: i) Ambac’s common 
stock and warrant market capitalization,  ii) fair value estimates of Ambac Assurance preferred shares (reported as noncontrolling interests on 
Ambac's balance sheet) and iii) an estimated control premium. Step one of the impairment test indicated the reporting unit's carrying value 
exceeded its fair value.

Accordingly, the Company performed step two of the impairment test, which indicated the implied fair value of goodwill was zero.  This was 
the result of  substantial decreases in the reporting unit's fair value and substantial increases in the fair value of its net assets.  The fair value 
of the reporting unit decreased significantly due to a material decrease in Ambac's market capitalization components (described above).  The 
reporting unit's fair value of net assets increased significantly primarily as a result of a decrease in the estimated fair value of financial guarantee 
liabilities and, to a lesser extent, a decrease in the fair value of long-term debt.  The fair value decrease in financial guarantee liabilities, which 
is a Level 3 estimate, was primarily driven by wider Ambac credit spreads and positive loss and loss expense reserves development.  Please 
refer to Note 9. Fair Value Measurements for further discussion on the fair value model for financial guarantee liabilities. The fair value 
decrease in long-term debt was driven by lower market pricing on surplus notes and junior surplus notes.

As a result, the Company recorded a full non-cash, non-tax deductible goodwill impairment charge of $514,511 in 2015. 

| Ambac Financial Group, Inc.   88   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Insurance Intangible Asset: 

At the Fresh Start Reporting Date, an insurance intangible asset was recorded which represented the difference between the fair value and 
aggregate  carrying  value  of  the  financial  guarantee  insurance  and  reinsurance  assets  and  liabilities. The  carrying  values  of  our  financial 
guarantee insurance and reinsurance contracts continue to be reported and measured in accordance with existing accounting policies. Pursuant 
to the Financial Services-Insurance Topic of the ASC, the insurance intangible is to be measured on a basis consistent with the related financial 
guarantee insurance and reinsurance contracts. The insurance intangible asset is amortized using a level yield method based on par exposure 
of the related financial guarantee insurance or reinsurance contracts and is applied to groups of contracts with similar characteristics. 

Restricted Cash: 

Cash that we do not have the right to use for general purposes is recorded as restricted cash in our consolidated balance sheets. Restricted cash 
includes consolidated variable interest entity cash restricted to fund the obligations of the consolidated VIEs. 

Loss and Loss Expenses: 

The loss and loss expense reserve (“loss reserve”) policy relates only to Ambac’s non-derivative insurance business for insurance policies 
issued to beneficiaries, including VIEs, for which we do not consolidate the VIE. Losses and loss expenses are based upon estimates of the 
ultimate aggregate losses inherent in the non-derivative financial guarantee portfolio as of the reporting date. The policy for derivative contracts 
is discussed in the “Derivative Contracts” section above. A loss reserve is recorded on the balance sheet on a policy-by-policy basis. Loss 
reserve components of an insurance policy include unpaid claims and the present value ("PV") of expected net cash flows required to be paid 
under an insurance contract, further described below:  

•  Unpaid claims represent the sum of (i) claims not yet paid for policies allocated to the Segregated Account, including Deferred Amounts 
(as defined in Note 1. Background and Business Description) and (ii) accrued interest on Deferred Amounts (generally at an effective 
rate of 5.1%.) as required by the Segregated Account Rehabilitation Plan.  Refer to Note 1. Background and Business Description for 
further discussion of the Segregated Account Rehabilitation Plan.  Unpaid claims are measured based on the cost of settling the claims, 
which is principal plus accrued interest.  

•  The PV of expected net cash flows represents the PV of expected cash outflows less the PV of expected cash inflows. The PV of expected 
net cash flows are impacted by: (i) expected future claims to be paid under an insurance contract, including the impact of potential 
settlement outcomes upon future installment premiums, (ii) expected recoveries from contractual breaches of RMBS representations and 
warranties by transaction sponsors, which is discussed further in the “RMBS Representation and Warranty Subrogation Recoveries” 
section below, (iii) excess spread within the underlying transaction's cash flow structure, and (iv) other subrogation recoveries, including 
expected receipts from third parties within the underlying transaction's cash flow structure.  Ambac’s approach to resolving disputes 
involving contractual breaches by transaction sponsors or other third parties has included negotiations and/or pursuing litigation. Ambac 
does not include potential recoveries attributed solely to fraudulent inducement claims in our estimate of subrogation recoveries, since 
any remedies under such claims would be non-contractual.  

Net cash outflow policies represent contracts where the sum of unpaid claims plus the PV of expected cash outflows are greater than the PV 
of expected cash inflows. For such policies, a “Loss and loss expense reserves” liability is recorded for the sum of: (i) unpaid claims plus (ii) 
the excess of the PV of expected net cash outflows over the unearned premium revenue. Net cash inflow policies represent contracts where 
losses have been paid, but not yet recovered, such that the PV of expected cash inflows are greater than the sum of unpaid claims plus the PV 
of expected cash outflows. For such policies, a “Subrogation recoverable” asset is recorded for the difference between (i) the PV of expected 
net cash inflows and (ii) unpaid claims.  

The approaches used to estimate expected future losses and recoveries considers the likelihood of all possible outcomes. The evaluation process 
for determining expected losses is subject to certain judgments based on our assumptions regarding the probability of default by the issuer of 
the insured security, probability of settlement outcomes (which may include commutation settlements, refinancing and/or other settlement 
outcomes) and expected severity of credits for each insurance contract. Ambac’s loss reserves are based on management’s ongoing review of 
the financial guarantee credit portfolio. Active surveillance of the insured portfolio enables Ambac’s Risk Management Group ("RMG") to 
track credit migration of insured obligations from period to period and update internal classifications and credit ratings for each transaction. 
Non-adversely classified credits are assigned a Class I rating while adversely classified credits are assigned a rating of Class IA through Class 
V. The criteria for an exposure to be assigned an adversely classified credit rating includes the deterioration of an issuer’s financial condition, 
underperformance of the underlying collateral (for collateral dependent transactions such as mortgage-backed or student loan securitizations), 
poor performance by the servicer of the underlying collateral and other adverse economic events or trends. The servicer of the underlying 
collateral of an insured securitization transaction is a consideration in assessing credit quality because the servicer’s performance can directly 
impact the performance of the related issue. For example, a servicer of a mortgage-backed securitization that does not remain current in its 
collection loss mitigation efforts could cause an increase in the delinquency and potential default of the underlying obligation. Similarly, loss 
severities increase when a servicer does not effectively handle loss mitigation activities such as (i) the advancing of delinquent principal and 
interest and of default related expenses which are deemed to be recoverable by the servicer, (ii) pursuit of loan charge-offs which maximize 
cash flows from the mortgage loan pool, and (iii) foreclosure and real estate owned disposition strategies and timelines. All credits are assigned 
risk classifications by RMG using the following guidelines: 

| Ambac Financial Group, Inc.   89   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

CLASS I - “Fully Performing - Meets Ambac Criteria with Remote Probability of Claim” - Credits that demonstrate adequate security and 
structural protection with a strong capacity to pay interest, repay principal and perform as underwritten. Factors supporting debt  service 
payment and performance are considered unlikely to change and any such change would not have a negative impact upon the fundamental 
credit quality.  Through ongoing surveillance, Ambac may also designate Class I credits into one or more of the following categories:

• 

Survey list - credits that may lack information or demonstrate a weakness but further deterioration is not expected.

•  Watch list - credits that demonstrate the potential for future material adverse development due to such factors as long-term uncertainty 
about a particular sector, a certain structural element related to the issuer or transaction or overall financial and economic sustainability.

CLASS IA - “Potential Problem with Risks to be Dimensioned” - Credits that are fully current and monetary default or claims-payment are 
not anticipated. The payor’s or issuer’s financial condition may be deteriorating or the credits may lack adequate collateral. A structured 
financing may also evidence weakness in its fundamental credit quality as evidenced by its under-performance relative to its modeled projections 
at underwriting, issues related to the servicer’s ability to perform or questions about the structural integrity of the transaction. While certain 
of these credits may still retain an investment grade rating, they usually have experienced or are vulnerable to a ratings downgrade. Further 
investigation is required to dimension and correct any deficiencies. A complete legal review of documents may be required. An action plan 
should be developed with triggers for future classification changes upward or downward. 

CLASS II - “Substandard Requiring Intervention” - Credits whose fundamental credit quality has deteriorated to the point that timely payment 
of debt service may be jeopardized by adversely developing trends of a financial, economic, structural, managerial or political nature. No 
claim payment is currently foreseen but the probability of loss or claim payment over the life of the transaction is now existent (generally 10% 
or greater probability). Class II credits may be border-line or below investment grade (BBB- to B). Prompt and sustained action must be taken 
to execute a comprehensive loss mitigation plan and correct deficiencies. 

CLASS III - “Doubtful with Clear Potential for Loss” - Credits whose fundamental credit quality has deteriorated to the point that timely 
payment of debt service has been or will be jeopardized by adverse trends of a financial, economic, structural, managerial or political nature 
which, in the absence of positive change or corrective action, are likely to result in a loss. The probability of monetary default or claims paying 
over the life of the transaction is generally 50% or greater. Full exercise of all available remedial actions is required to avert or minimize 
losses. Class III credits will generally be rated below investment grade (B to CCC). 

CLASS IV - “Imminent Default or Defaulted” - Monetary default or claim payments have occurred or are expected imminently. Class IV 
credits are generally rated D. 

CLASS V - “Fully Reserved” - The credit has defaulted and payments have occurred. The claim payments are scheduled and known, reserves 
have been established to fully cover such claims, and no claim volatility is expected. 

The population of credits evaluated in Ambac’s loss reserve process are: (i) all adversely classified credits (Class IA through V) and ii) non-
adversely classified credits which had an internal Ambac rating downgrade since the transaction’s inception. One of two approaches is then 
utilized to estimate losses to ultimately determine if a loss reserve should be established. The first approach is a statistical expected loss 
approach, which considers the likelihood of all possible outcomes. The “base case” statistical expected loss is the product of: (i) the par 
outstanding on the credit; (ii) internally developed historical default information (taking into consideration internal ratings and average life 
of an obligation); (iii) internally developed loss severities; and (iv) a discount factor. The loss severities and default information are based on 
rating agency information, are specific to each bond type and are established and approved by senior RMG officers.  For certain credit exposures, 
Ambac’s additional monitoring, loss remediation efforts and probabilities of potential settlement outcomes may provide information relevant 
to adjust this estimate of “base case” statistical expected losses.  Analysts may accept the “base case” statistical expected loss as the best 
estimate of expected loss or assign multiple probability weighted scenarios to determine an adjusted statistical expected loss that better reflects 
management’s view of a given transaction’s expected losses, as well as the potential for additional remediation activities (i.e., commutations). 

The second approach entails the use of cash-flow based models to estimate expected losses (future claims, net of potential recoveries, expected 
to be paid to the holder of the insured financial obligation). Ambac’s RMG group will consider the likelihood of all possible outcomes and 
develop appropriate cash flow scenarios. This approach can include the utilization of internal or third party models to project future losses 
and resultant claim payment estimates. We utilize cash flow models for residential mortgage-backed (RMBS), student loan, and other exposures. 
RMBS and student loan models use historical performance of the collateral pools in order to then derive future performance characteristics, 
such as default and voluntary prepayment rates, which in turn determine projected future claim payments.  In other cases, such as many public 
finance exposures, including our Puerto Rico exposures, we do not specifically forecast resources available to pay debt service in the cash 
flow model itself.  Rather, we consider the issuers’ overall ability and willingness to pay, including the fiscal, economic, legal and political 
framework. In this approach a probability-weighted expected loss estimate is developed based on assigning probabilities to multiple claim 
payment scenarios and applying an appropriate discount factor. Additionally, we assign a probability to the issuer’s ability to refinance an 
insured issue and/or Ambac’s ability to execute a potential settlement (i.e., commutation) of the insurance policy, including the impact on 
future installment premiums. The commutation scenarios and the related probabilities of occurrence vary by transaction, depending on our 
view of the likelihood of negotiating such a transaction with issuers and/or investors. 

| Ambac Financial Group, Inc.   90   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The discount factor applied to the statistical expected loss approach is based on a risk-free discount rate corresponding to the remaining 
expected weighted-average life of the exposure and the exposure currency. For the cash flow scenario approach, discount factors are applied 
based on a risk-free discount rate term structure and correspond to the date of each respective cash flow payment or recovery and the exposure 
currency. Discount factors are updated for the current risk-free rate each reporting period. 

Ambac establishes loss expense reserves based on our estimate of expected net cash outflows for loss expenses, such as legal and consulting 
costs. 

RMBS Representation and Warranty Subrogation Recoveries: 

Ambac records as a component of its loss reserve estimate, subrogation recoveries related to securitized loans in RMBS transactions that 
breached certain representations and warranties described herein.  Generally, the sponsor of a RMBS transaction provided representations and 
warranties with respect to the securitized loans, including  representations and warranties with respect to loan characteristics, the absence of 
borrower fraud in the underlying loan pools and other misconduct in the origination process and attesting to the compliance of loans with the 
prevailing underwriting policies.  In such cases, the sponsor of the transaction is contractually obligated to repurchase, cure or substitute 
collateral for any loan that breaches the representations or warranties.  Ambac or its counsel have engaged consultants with significant mortgage 
underwriting experience to review the underwriting documentation for mortgage loans underlying certain insured RMBS transactions which 
exhibited exceptionally poor performance. Factors which Ambac believes to be indicative of poor performance include (i) increased levels of 
early payment defaults, (ii) significant numbers of loan liquidations or charge-offs and resulting high levels of losses, and (iii) rapid elimination 
of credit protections inherent in the transactions’ structures. With respect to item (ii), “loan liquidations” refers to loans for which the servicer 
has liquidated the related collateral and the securitization has realized losses on the loan; “charge-offs” refers to loans which have been written 
off as uncollectible by the servicer, generating no recoveries to the securitization, and may also refer to the unrecovered balance of liquidated 
loans. In either case, the servicer has taken actions to recover against the collateral, and the securitization has incurred losses to the extent 
such actions did not result in full repayment of the borrower’s obligations. 

Generally, subsequent to the forensic exercise of examining loan files to ascertain whether the loans conformed to the representations and 
warranties, we submit nonconforming loans for repurchase to the contractual counterparty bearing the repurchase obligation, which is typically 
the transaction sponsor. To effect a repurchase, depending on the transaction, the sponsor is obligated to repurchase the loan at (a) for loans 
which have not been liquidated or charged off, either (i) the current unpaid principal balance of the loan, (ii) the current unpaid principal 
balance plus accrued unpaid interest, or (iii) the current unpaid principal balance plus accrued interest plus unreimbursed servicer advances/
expenses and/or trustee expenses resulting from the breach of representations and warranties that trigger the repurchase, and (b) for a loan 
that has already been liquidated or charged-off, the amount of the realized loss (which in certain cases may exclude accrued unpaid interest). 
In  cases  where  loans  are  repurchased  by  a  sponsor,  the  effect  is  typically  to  offset  current  period  losses  and  then  to  increase  the  over-
collateralization of the securitization, depending on the extent of loan repurchases and the structure of the securitization. Specifically, the 
repurchase price is paid by the sponsor to the securitization trust which holds the loan. The cash becomes an asset of the trust, replacing the 
loan that was repurchased by the sponsor. On a monthly basis the cash received related to loan repurchases by the sponsor is aggregated with 
cash collections from the underlying mortgages and applied in accordance with the trust indenture payment waterfall. This payment waterfall 
typically includes principal and interest payments to the note holders, various expenses of the trust and reimbursements to Ambac, as financial 
guarantor, for previously paid claims. Notwithstanding the reimbursement of previous claim payments, to the extent there continues to be 
insufficient cash in the waterfall in the current month to make scheduled principal and interest payments to the note holders, Ambac is required 
to make additional claim payments to cover this shortfall. Ambac may also receive payments directly from transaction sponsors in settlement 
of their repurchase obligations pursuant to negotiated settlement agreements or otherwise as a result of related litigation. 

While the obligation by sponsors to repurchase loans with material breaches is clear, generally the sponsors have not yet honored those 
obligations without actual or threatened litigation. Ambac has utilized the results of the above described loan file examinations to make demands 
for loan repurchases from sponsors or their successors and, in certain instances, as a part of the basis for litigation. Ambac’s approach to 
resolving these disputes has included negotiating with individual sponsors at the transaction level and in some cases at the individual loan 
level and has resulted in the repurchase of some loans. Ambac has initiated and will continue to pursue lawsuits seeking compliance with the 
repurchase obligations in the securitization documents. 

Ambac has performed the above-mentioned, detailed examinations on a variety of second-lien and first-lien transactions that have experienced 
exceptionally poor performance. However, the loan file examinations and related estimated recoveries we have reviewed and recorded to date 
have been limited to only those transactions whose sponsors (or their successors) are subsidiaries of large financial institutions, all of which 
carry an investment grade rating from at least one nationally recognized rating agency, or are otherwise deemed to have the financial wherewithal 
to live up to their repurchase obligations. While our contractual recourse is generally to the sponsor/subsidiary, rather than to the parent, each 
of these large institutions has significant financial resources and may have an ongoing interest in mortgage finance, and we therefore believe 
that the financial institution/parent would ultimately assume financial responsibility for these obligations if the sponsor/subsidiary is unable 
to honor its contractual obligations or pay a judgment that we may obtain in litigation. Additionally, in the case of successor institutions, we 
are not aware of any provisions that explicitly preclude or limit the successors’ ability to honor the obligations of the original sponsor. Certain 
successor  financial  institutions  have  made  significant  payments  to  certain  claimants  to  settle  breaches  of  representations  and  warranties 
perpetrated by sponsors that have been acquired by such financial institutions.  In addition, Ambac received a significant payment in 2016 

| Ambac Financial Group, Inc.   91   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

from JP Morgan to settle RMBS-related litigation. As a result of these factors, we did not make significant adjustments to our estimated 
subrogation recoveries with respect to the credit risk of these sponsors or their successors. 

Our ability to recover the RMBS subrogation recoveries is subject to significant uncertainty, including risks inherent in litigation, collectability 
of such amounts from counterparties and/or their respective parents and affiliates, timing of receipt of any such recoveries, intervention by 
OCI which could impede our ability to take actions required to realize such recoveries and uncertainties inherent in the assumptions used in 
estimating such recoveries. 

The approach used to estimate subrogation recoveries is based on obtaining a random sample of the original loans in the pool, using a protocol 
developed by a statistical expert. The ratio of: (a) loans identified in the sample as having materially breached representations and warranties 
to (b) the total loan sample size, is applied (extrapolated) to the sum of realized and estimated future collateral pool losses to determine an 
estimated repurchase obligation. We limit the estimated repurchase obligation by ever-to-date incurred losses, with respect to the remaining 
steps in this approach. 

Multiple probability-weighted scenarios are developed by applying various realization factors to the estimated repurchase obligation. The 
realization factors in these scenarios were developed using Ambac’s own assumptions about the likelihood of outcomes based on all the 
information available to it including, but not limited to, (i) discussions with external legal counsel and their views on ultimate settlement and/
or litigation outcomes, (ii) experience with loan put back negotiations where the existence of a material breach was debated and negotiated at 
the loan level, (iii) the pervasiveness of the breach rates and (iv) experience in settling similar claims. The probability weightings are developed 
based on the unique facts and circumstances for each transaction. The sum of these probability-weighted scenarios represents the undiscounted 
subrogation recovery, which is then discounted using a factor derived from a risk-free discount rate term structure that corresponds to the date 
of each respective recovery.  Discount factors are updated for the current risk-free rate each reporting period. 

Obligations under Investment Agreements: 

Ambac's investment agreements were written principally to asset-backed and structured finance issuers, states, municipalities and municipal 
authorities, and required Ambac to pay an agreed-upon rate of interest based on funds deposited. Proceeds from these investment agreement 
obligations were used to invest in fixed income investments. Interest income from these investments was included in Net investment income 
on the Consolidated Statements of Total Comprehensive Income. The principal amount outstanding under investment agreements of $82,358, 
with a variable interest rate of 0.94%, at December 31, 2016 was repaid during the first quarter of 2017.

Obligations under investment agreements are reported as liabilities on the Consolidated Balance Sheets at their principal value less unamortized 
discount. The carrying value of these obligations is adjusted for principal paid and interest credited to the account. Interest expense is computed 
based upon daily outstanding liability balances at rates and periods specified in the agreements adjusted for accretion of discount, and is 
included in Interest expense on the Consolidated Statements of Total Comprehensive Income. 

Long-Term Debt:

Long-term debt issued by Ambac is carried at par value less unamortized discount. Accrued interest and discount accretion on long-term debt 
is reported as Interest expense on the Consolidated Statements of Total Comprehensive Income.   To the extent Ambac repurchases or redeems 
its long-term debt, such repurchases or redemptions may be settled for an amount different than the carrying value of the obligation. Any 
difference between the settlement payment and carrying value of the obligation is reported in Net realized gains (losses) on extinguishment 
of debt on the Consolidated Statements of Total Comprehensive Income.  

Long-term debt issued by VIEs consolidated as a result of Ambac's variable interest arising from financial guarantees written by Ambac's 
subsidiaries, is carried at fair value with changes in fair value recorded as Income (loss) on variable interest entities on the Consolidated 
Statements of Total Comprehensive Income. 

Noncontrolling Interest:

At December 31, 2016 and 2017, Ambac Assurance had 26,411 shares of issued and outstanding auction rate preferred shares with a liquidation 
preference of $660,300 (reported as noncontrolling interest of $264,110 on Ambac's balance sheet).  The auction occurs every 28 days. Due 
to the dislocation in the auction rate markets and the Company’s financial condition, the dividend rate on the auction market preferred has 
continuously been reset at the maximum rate of one-month LIBOR plus 200 basis points. 

Under the terms of the preferred stock, dividends may not be paid on the common stock of Ambac Assurance unless all accrued and unpaid 
dividends on the preferred stock for the then current dividend period have been paid, provided, that dividends on the common stock may be 
made at all times for the purpose of, and only in such amounts as are necessary for, enabling Ambac (i) to service its indebtedness for borrowed 
money as such payments become due or (ii) to pay its operating expenses.  If dividends are paid on the common stock as provided in the prior 
sentence, dividends on the preferred stock become cumulative until the date that all accumulated and unpaid dividends have been paid on the 
preferred stock.  Ambac Assurance has not paid dividends on its preferred stock since 2010.

| Ambac Financial Group, Inc.   92   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Employee Benefits:

Postretirement and Postemployment Benefits: 

Ambac provides postretirement and postemployment benefits, including health and life benefits covering employees who meet certain age 
and service requirements. Ambac accounts for these benefits under the accrual method of accounting. Amounts related to the postretirement 
health benefits liability are established and charged to expense based on actuarial determinations.  

Incentive Compensation: 

Incentive compensation is a key component of our compensation strategy. Our incentive compensation awards generally have two components: 
short term incentive compensation (consisting of an annual cash bonus and deferred stock units for certain officers) and long term incentive 
plan awards (consisting of cash awards and performance stock units).  Annual decisions with regard to incentive compensation are generally 
made in the first quarter of each year and are based on Company performance and individual and business unit performance of the prior year.  

The Ambac 2013 Incentive Compensation Plan (the “Equity Plan”) provides for the granting of stock options, restricted stock, stock appreciation 
rights, restricted and performance units and other awards that are valued or determined by reference to Ambac's common stock to employees 
and directors.  In March 2014, Ambac developed a long term incentive compensation plan (“LTIP”) as a sub-plan of the 2013 Plan. This LTIP 
allows for both cash and equity performance awards to US employees.  In 2015, Ambac UK 's Board of Directors adopted a long term incentive 
plan which provides cash based performance awards to Ambac UK employees.

Prior to the adoption of ASU 2016-09 (as noted below), Ambac recognized compensation costs for all equity classified awards granted at 
fair value with an estimation of forfeitures for all unvested shares. As a result of the adoption of ASU 2016-09 in 2017, Ambac recognizes 
compensation costs for all equity classified awards granted at fair value and records forfeitures for unvested shares only when they occur.

•  Deferred stock units granted vest upon grant and will settle and convert to Ambac common stock annually over a two-year period (50%
on the first anniversary of the grant date and 50% on the second anniversary of the grant date).  The fair value of these grants is recognized 
as compensation expense on the date of grant since no future service is required.

•  Restricted stock units granted only require future service and accordingly the respective fair value is amortized into compensation expense 

over the relevant service period.  

•  Performance stock units granted and performance cash awards require both future service and achieving specified performance targets 
to vest and accordingly compensation costs are only recognized when the achievement of the performance conditions are considered 
probable. Once deemed probable, such compensation costs are amortized over the relevant service period.  Compensation costs are 
initially based on the probable outcome of the performance conditions and adjusted for subsequent changes in the estimated or actual 
outcome each reporting period as necessary.  Changes in the estimated or actual outcome of a performance condition are recognized by 
reflecting a retrospective adjustment to compensation cost in the current period.

Depreciation and Amortization: 

Depreciation of furniture and fixtures and electronic data processing equipment is charged over the estimated useful lives of the respective 
assets, ranging from three to five years, using the straight-line method. Amortization of leasehold improvements is charged over the remaining 
term of the respective operating lease using the straight-line method. 

Foreign Currency:

Financial statement accounts expressed in foreign currencies are translated into U.S. dollars in accordance with the Foreign Currency Matters 
Topic of the ASC. The functional currencies of Ambac's subsidiaries are the local currencies of the country where the respective subsidiaries 
are based, which are also the primary operating environments in which the subsidiaries operate. 

Foreign currency translation: Functional currency assets and liabilities of Ambac’s foreign subsidiaries are translated into U.S. dollars using 
exchange rates in effect at the balance sheet dates and the related translation adjustments, net of deferred taxes, are included as a component 
of Accumulated Other Comprehensive Income in Stockholders' Equity.  Consolidated Statements of Total Comprehensive Income (Loss)
accounts expressed in functional currencies are translated using average exchange rates. 

Foreign currency transactions: The impact of non-functional currency transactions and the remeasurement of non-functional currency assets 
and liabilities into the respective subsidiaries' functional currency (collectively "foreign currency transactions gains/(losses)") are $21,116, 
$(39,128) and $(17,010) for the years ended December 31, 2017, 2016 and 2015, respectively.  Foreign currency transactions gains/(losses) 
are primarily the result of remeasuring Ambac UK's assets and liabilities denominated in currencies other than its functional currency, primarily 
the U.S. dollar and the Euro.  The significant components of foreign currency transaction gains/(losses), including the respective classifications 
in the Consolidated Statement of Total Comprehensive Income, are as follows:  

•  Remeasurement of loss reserves, classified in Loss and loss expenses, in the amount of $28,939, $(77,578) and $(24,838) for the years 

ended December 31, 2017, 2016 and 2015, respectively; 

| Ambac Financial Group, Inc.   93   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

•  Realized gain (loss) from the sale of  investment securities and the unrealized gains (losses) of trading and short-term investment securities, 
classified in Net realized investment gains, in the amount of $(4,769), $30,179 and $5,816 for the years ended December 31, 2017, 2016 
and 2015, respectively; 

•  Remeasurement of premium receivables, classified in Other income, in the amount of $(1,904), $8,003 and $(2,555) for the years ended 

December 31, 2017, 2016 and 2015, respectively; and

•  Remeasurement of credit derivative liabilities, classified in Net change in fair value of credit derivative, in the amount of $(1,150), $32

and $3,981 for the years ended December 31, 2017, 2016 and 2015, respectively.

Income Taxes: 

Ambac files a consolidated U.S. Federal income tax return with its subsidiaries. Ambac UK files tax returns in both the United Kingdom and 
Italy (for its Milan branch). Current tax assets and liabilities are recognized for taxes refundable or payable for the current year. Deferred tax 
assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts 
of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected 
to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on current and 
deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. In December 2017, the 
Tax Cut and Jobs Act ("TCJA") was enacted that introduces significant changes that impact U.S. corporate tax rates, business-related exclusions, 
and deductions and credits effective January 1, 2018. As such, we incorporated the effects of the TCJA in our current and deferred tax evaluation 
for the year ended December 31, 2017.  

Ambac evaluates our deferred income taxes quarterly to determine if valuation allowances are required. The Income Taxes Topic of the ASC 
requires that companies assess whether valuation allowances should be established against their deferred tax assets based on the consideration 
of all available evidence using a ‘more likely than not” standard. In making such judgments, significant weight is given to evidence that can 
be objectively verified. 

The level of deferred tax asset recognition is influenced by management’s assessment of future profitability, which depends on the existence 
of sufficient taxable income of the appropriate character (ordinary vs. capital) within the carry forward periods available under the tax law. 
We determined that we would not be able to realize all of our deferred tax assets in the future, and therefore we reduced such amounts through 
a charge to the Statement of Total Comprehensive Income in the period in which that determination was made. Refer to  Note 14. Income 
Taxes for further discussion of the Company's tax positions, including the impact of the TCJA.

The Income Taxes Topic of the ASC provides a framework to determine the appropriate level of tax reserves for uncertain tax positions. This 
framework prescribes a more-likely-than-not threshold for financial statement recognition and measurement of a tax position taken or expected 
to be taken in a tax return. Ambac also accrues interest and penalties related to these unrecognized tax benefits in the provision for income 
taxes. 

Net Income Per Share: 

Basic net income per share is computed by dividing net income attributable to common stockholders by the weighted-average number of 
common shares outstanding and vested restricted stock units. Diluted net income per share is computed by dividing net income attributable 
to common stockholders by the weighted-average number of common shares used for basic earnings per share plus all potential dilutive 
common shares outstanding during the period.  All potential dilutive common shares outstanding consider common stock deliverable pursuant 
to warrants issued under the Reorganization Plan, vested and unvested options, unvested restricted stock units and unvested performance stock 
units granted under employee and director compensation plans. 

Supplemental Disclosure of Cash Flow Information:

(Dollars in thousands) Year Ended December 31,

2017

2016

2015

Cash paid during the period for:

Income taxes

Interest on long-term debt and investment agreements

Non-cash financing activities:

$

40,334

$

39,112

21,437

$

4,537

16,969

1,847

Decrease in long-term debt as a result of an exchange for investment securities

55,426

—

—

Reclassifications:

Reclassifications may have been made to prior years' amounts to conform to the current year's presentation.

| Ambac Financial Group, Inc.   94   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Recently Adopted Accounting Standards:

Effective December 31, 2017, Ambac early adopted the following accounting standard:

Reclassification of Shareholders' Equity items related to the TCJA

In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220) - Reclassification of 
Certain Tax Effects from Accumulated Other Comprehensive Income.  Current GAAP requires the effect of a change in tax laws or rates which 
impact deferred tax assets and liabilities to be recorded as income tax expense within net income.  This guidance is applicable even in situations 
where the related income tax effects of items in accumulated other comprehensive income ("AOCI") were originally charged or credited 
directly to AOCI as required by GAAP.  As a result, when tax laws or rates change, the tax effects of certain items (referred to as "stranded 
tax effects") in AOCI may not reflect the appropriate tax rate.  This ASU eliminates the stranded tax effects by allowing a reclassification of 
those  items  from AOCI  to  retained  earnings  that  resulted  from  the  recently  enacted TCJA.   Ambac  early  adopted  this  standard  effective 
December 31, 2017.  Adoption of this ASU resulted in a decrease to AOCI of $6,588 and offsetting increase to retained earnings of $6,588
with no change to total shareholders' equity.

Effective January 1, 2017, Ambac adopted the following accounting standards:

Consolidation of Variable Interest Entities - Decision Makers

In October 2016, the FASB issued ASU 2016-17, Consolidation (Topic 810) - Interests Held through Related Parties That Are under Common 
Control.  The new guidance changes how a reporting entity that is a single decision maker for a VIE will consider its indirect interests in that 
VIE when determining whether the reporting entity is the primary beneficiary and should consolidate the VIE.  Under previous GAAP, a single 
decision maker in a VIE is required to consider an indirect interest held by a related party under common control in its entirety. Under the new 
ASU, the single decision maker will consider the indirect interest on a proportionate basis. Adoption of this ASU did not have an impact on 
Ambac's financial statements.

Improvements to Employee Share-Based Payment Accounting

In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation (Topic 718) - Improvements to Employee Share-Based 
Payment Accounting.  The objective of this ASU is to improve and simplify the accounting for employee share-based payment accounting. 
The amendments are as follows: (i) recognizing excess tax benefits and tax deficiencies as income tax expense, (ii) recognizing excess tax 
benefits regardless of whether it reduces taxes payable in the current period, (iii) classifying excess tax benefits related to share-based payments 
along with other income tax cash flows as an operating activity on the statement of cash flows, (iv) for purposes of accruing compensation 
costs, allowing companies to make an accounting policy election to either: a) estimate forfeitures or b) account for forfeitures as they occur, 
which Ambac elected to do upon adoption, (v) to qualify for equity classification treatment, permitting tax withholding by employees up to 
the maximum statutory tax rate and (vi) classifying cash paid by an employer to a taxing authority when directly withholding shares as a 
financing activity on the statement of cash flows. Adoption of this ASU did not have a material impact on Ambac's financial statements.

Equity Method of Accounting

In March 2016, the FASB issued ASU 2016-07, Investments-Equity Method and Joint Ventures (Topic 323) - Simplifying the Transition to the 
Equity Method of Accounting.  This ASU eliminates the requirement that when an investment qualifies for use of the equity method as a result 
of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and 
retained earnings retroactively as if the equity method had been in effect during all previous periods that the investment had been owned. The 
ASU will now require that at the date an available-for-sale equity security becomes qualified for the equity method of accounting, the reporting 
entity will recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income. Adoption of this ASU 
did not have an impact on Ambac's financial statements.

Contingent Put and Call Options in Debt Instruments

In March 2016, the FASB issued ASU 2016-06, Derivatives and Hedging (Topic 815) - Contingent Put and Call Options in Debt Instruments.  
Previous accounting rules required that embedded derivatives be separated from the host contract in a financial instrument and accounted for 
separately  as  derivatives  if  certain  criteria  are  met.    One  of  these  criteria  is  that  the  economic  characteristics  and  risks  of  the  embedded 
derivatives are not "clearly and closely related" to the host contract. The objective of the ASU is to resolve diversity in practice in assessing 
embedded contingent put and call options. The ASU clarifies what steps are required when assessing whether the economic characteristics 
and risk of put and call options are clearly and closely related to their debt host contracts. Adoption of this ASU did not have an impact on 
Ambac's financial statements.

Future Application of Accounting Standards:

Equity-linked instruments with down round features

In July 2017, the FASB issued ASU 2017-11, Earnings Per Share (Topic 260) and Derivatives and Hedging (Topic 815) - Accounting for 
Certain Financial Instruments with Down Round Features.  Equity-linked instruments, such as warrants and convertible instruments may 
contain down round features that result in the strike price being reduced on the basis of the pricing of future equity offerings. Under the ASU, 

| Ambac Financial Group, Inc.   95   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

a down round feature will no longer require a freestanding equity-linked instrument (or embedded conversion option) to be classified as a 
liability that is remeasured at fair value through the income statement (i.e. marked-to-market).  However, other features of the equity-linked 
instrument (or embedded conversion option) must still be evaluated to determine whether liability or equity classification is appropriate.  Equity 
classified instruments are not marked-to-market.  For earnings per share ("EPS") reporting, the ASU requires companies to recognize the effect 
of the down round feature only when it is triggered by treating it as a dividend and as a reduction of income available to common shareholders 
in basic EPS. The amendments in this ASU are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning 
after December 15, 2018. Early adoption is permitted, including adoption in any interim period.  Ambac will adopt this ASU on January 1, 
2019. The adoption of this ASU is not expected to have a consequential impact on Ambac's financial statements.

Stock Compensation--Scope of Modification Accounting

In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718) - Scope of Modification Accounting.  The ASU 
provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification 
accounting.  Entities will apply the modification accounting guidance if the value, vesting conditions or classification of the award changes.  
The current disclosure requirements in Topic 718 apply regardless of whether an entity is required to apply modification accounting under the 
amendments in this ASU.  The amendments in this ASU are effective for all entities for annual periods, and interim periods within those annual 
periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period for which financial statements 
have not yet been issued.  Ambac will adopt this ASU on January 1, 2018. The adoption of this ASU is not expected to have a consequential 
impact on Ambac's financial statements.

Premium Amortization on Callable Debt Securities

In March 2017, the FASB issued ASU 2017-08, Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization 
on Purchased Callable Debt Securities.  The ASU shortens the amortization period for the premium on callable debt securities to the earliest 
call date.  Under current GAAP, a reporting entity generally amortizes the premium as yield adjustment over the contractual life (i.e. maturity) 
of the debt security and if that debt security is called, the entity would record a loss equal to the unamortized premium.  The ASU does not 
change the accounting for callable debt securities held at a discount, which will continue to be amortized to maturity.  ASU 2017-08 is effective 
for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, with early adoption permitted.  The ASU 
must be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of 
the period of adoption. Ambac will adopt this ASU on January 1, 2019 and we are evaluating its impact on Ambac's financial statements.

Net Periodic Pension and Postretirement Costs

In  March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715) - Improving the Presentation of Net Periodic 
Pension Cost and Net Periodic Postretirement Benefit Cost.  The objective of the ASU is to increase transparency in the reporting of net 
pension cost and net postretirement cost (collectively "net benefit cost"). The ASU requires that the service cost component of net benefit cost 
be reported on the same line item as other compensation costs arising from services rendered by employees.  It further requires that the other 
components of net benefit costs (i.e. interest costs, amortization of prior service cost, etc.) be presented separately from the service cost 
component and outside the subtotal of income from operations, if one is presented.  ASU 2017-09 is effective for fiscal years beginning after 
December 15, 2017 and interim periods within those fiscal years, with early adoption permitted.  Ambac will adopt this ASU on January 1, 
2018.  The adoption of this ASU is not expected to have a consequential impact on Ambac's financial statements.

Restricted Cash

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230) - Restricted Cash. Current GAAP does not include 
specific guidance on the cash flow classification and presentation of changes in restricted cash and restricted cash flow equivalents other than 
limited guidance for non-for-profit entities. This ASU is intended to resolve diversity in practice in the classification of changes in restricted 
cash and restricted cash flow equivalents on the statement of cash flows.  The new guidance requires that restricted cash and restricted cash 
equivalents be included with cash and cash equivalents when reconciling the beginning and ending period amounts on the statement of cash 
flows, along with certain disclosures.  ASU 2016-18 is effective for fiscal years beginning after December 15, 2017 and interim periods within 
those  fiscal  years.  Early  adoption  is  permitted,  including  adoption  in  an  interim  period.   Amendments  in  the ASU  should  be  applied 
retrospectively to all periods presented. Ambac will adopt this ASU on January 1, 2018. The adoption of this ASU is not expected to have a 
consequential impact on Ambac's financial statements.

| Ambac Financial Group, Inc.   96   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Income Taxes

In October 2016,  the FASB issued ASU 2016-16, Income Taxes (Topic 740) - Intra-Entity Transfers of Assets Other Than Inventory.  
Current GAAP prohibits the recognition of current and deferred income taxes for intercompany transfers of assets until the asset has been 
sold to an outside party. The ASU will require companies to recognize the income tax effects of intercompany sales and transfers of assets 
other than inventory, as income tax expense (or benefit) in the period in which the transfer occurs. ASU 2016-16 is effective for fiscal years 
beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted as of the beginning of an 
annual reporting period for which financial statements (interim or annual) have not been issued.  Ambac will adopt this ASU on January 1, 
2018 and we are evaluating its impact on Ambac's financial statements.

Classification of Certain Cash Receipts and Cash Payments

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) - Classification of Certain Cash Receipts and Cash 
Payments. The ASU resolves diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement 
of cash flows. Transactions addressed in the ASU that may impact Ambac are as follows:

•  Debt prepayment or debt extinguishment costs - Such payments will be classified as a financing cash outflow.

• 

Settlement of zero-coupon debt or other debt with coupon rates that are insignificant in relation to the effective interest rate of the 
borrowing - The portion of the cash payment attributable to accreted interest will be classified as an operating cash outflow and the 
portion attributable to the principal will be classified as a financing cash outflow.

•  Distributions from equity-method investees - An entity will elect one of the two following approaches. Under the "cumulative earnings 
approach": i) distributions received up to the amount of cumulative earnings recognized will be treated as returns on investments and 
classified as cash inflows from operating activities and ii) distributions received in excess of earnings recognized will be treated as 
returns  of  investments  and  classified  as  cash  inflows  from  investing  activities.    Under  the  "nature  of  the  distribution"  approach, 
distributions received will be classified based on the nature of the activity that generated the distribution (i.e. classified as a return on 
investment or return of investment), when such information is available to the investor.

• 

Beneficial interests in securitization transactions - Any beneficial interests obtained in financial assets transferred to an unconsolidated 
securitization  entity  will  be  disclosed  as  a  non-cash  investing  activity.    Subsequent  cash  receipts  from  the  beneficial  interests  in 
previously transferred trade receivables will be classified as cash inflows from investing activities.

ASU 2016-15 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is 
permitted, including adoptions within an interim period.  Ambac will adopt this ASU on January 1, 2018. Adoption of this ASU is not expected 
to have a consequential impact on Ambac's financial statements.

Measurement of Credit Losses on Financial Instruments

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326) - Measurement of Credit Losses on Financial 
Instruments.  This ASU significantly affects how reporting entities will measure credit losses for financial assets that are not accounted for at 
fair value through net income, which include loans, debt securities, trade receivables, net investments in leases, and certain off-balance sheet 
credit exposures.  For financial assets measured at amortized cost, the ASU replaces the "incurred loss" model, which generally delayed 
recognition of the full amount of credit losses until the loss was probable of occurring, with an "expected loss" model, which reflects an entity's 
current estimate of all expected credit losses. Expected credit losses for amortized cost assets will be recorded as a valuation allowance, with 
subsequent increases or decreases in the allowance reflected in the income statement each period.  For available-for-sale debt securities, credit 
losses under the ASU will be measured similarly to current GAAP. However, under the ASU, credit losses for available-for-sale securities will 
be recorded as a valuation allowance (similar to the amortized cost assets approach described above), rather than as a direct write-down of 
the security as is required under current GAAP. As a result, improvements to estimated credit losses for available-for-sale debt securities will 
be recognized immediately in the income statement rather than as interest income over time. The ASU is effective for annual periods beginning 
after December 15, 2019, including interim periods within those fiscal years.  Early adoption is permitted as of the fiscal year beginning after 
December 15, 2018. Ambac has not determined whether it will early adopt this ASU and we are currently evaluating its impact on Ambac's 
financial statements.   The significant implementation matters to be addressed include identifying the inventory of financial assets that will 
be affected by this standard, identifying new data requirements and data sources for implementing the expected loss model for those instruments 
not already using this model and identifying and documenting accounting process changes, including related controls.

Leases

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The main difference between current U.S. GAAP and this ASU is the 
recognition of lease assets and lease liabilities for those leases classified as operating leases.  For operating leases, a lessee is required to: 1) 
recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, in the balance sheet, 2) recognize 
a single lease cost, calculated so that the cost is allocated over the lease term generally on a straight-line basis and 3) classify all cash payment 
within operating activities in the statement of cash flows. The ASU is effective for fiscal years beginning after December 15, 2018, including 
interim periods within those fiscal years. The transition guidance requires lessees to recognize and measure leases at the beginning of the 

| Ambac Financial Group, Inc.   97   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

earliest period presented using a modified retrospective approach which include a number of optional practical expedients.  We will adopt 
ASU 2015-02 on January 1, 2019. We are evaluating the impact of this ASU, including the transitional practical expedients, on Ambac's 
financial statements. We believe Ambac's office leases will be the most significantly impacted by this ASU. The significant implementation 
matters to be addressed include identifying the remaining inventory of leases (i.e. equipment and other) that will be affected by this standard 
and identifying and documenting accounting process changes, including related controls.

Recognition and Measurement of Financial Assets and Liabilities

In  January  2016,  the  FASB  issued ASC  2016-01,  Financial  Instruments  -  Overall  (Subtopic  825-10)  -  Recognition  and  Measurement  of 
Financial Assets and Financial Liabilities.   The ASU makes the following targeted changes for financial assets and liabilities: i) requiring 
equity investments with readily determinable fair values to be measured at fair value with changes recognized in net income; ii) simplifying 
the impairment assessment of equity securities without readily determinable fair values using a qualitative approach; iii) eliminating disclosure 
of the method and significant assumptions used to fair value instruments measured at amortized cost on the balance sheet; iv) requiring use 
of the exit price notion when measuring the fair value of instruments for disclosure purposes; v) for financial liabilities where the fair value 
option has been elected, requiring the portion of the fair value change related to instrument-specific credit risk (which includes a Company's 
own credit risk) to be separately reported in other comprehensive income; vi) requiring the separate presentation of financial assets and liabilities 
by measurement category and form of financial asset (liability) on the balance sheet or accompanying notes; and vii) clarifying that the 
evaluation of a valuation allowance on a deferred tax asset related to available-for-sale securities should be performed in combination with 
the entity's other deferred tax assets. The ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within 
those years  Early adoption of item (v) above is permitted for financial statements (both annual and interim periods) that have not yet been 
issued.  Ambac will adopt all provisions of this ASU on January 1, 2018.  

Ambac has elected the fair value option for all VIE financial assets and financial liabilities with net fair value changes reported in Income 
(loss) on variable interest entities in the Consolidated Statements of Total Comprehensive Income.   Upon implementation of ASU 2016-01, 
the  credit  component  of  fair  value  changes  in VIE  liabilities  will  be  reported  in Accumulated  other  comprehensive  income. We  are  still 
evaluating the transition adjustment impact of the ASU, which will be a reclassification between Retained earnings and Accumulated other 
comprehensive income, with no net change to Total stockholders' equity.  Subsequent to adoption, because the credit component of fair value 
changes in VIE liabilities will be reported in other comprehensive income, we will likely have greater volatility in net income (specifically 
the Income (loss) on variable interest entities line item).

Revenue recognition

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) that amends the accounting guidance for 
recognizing revenue for contracts with customers to transfer goods and contracts for the transfer of non-financial assets unless those contracts 
are within the scope of other accounting standards.  ASU 2015-14 deferred the effective date of ASU 2014-09 to annual periods beginning 
after December 15, 2017, including interim periods within that reporting period. Ambac will adopt this ASU on January 1, 2018. This ASU 
does not apply to insurance contracts and most financial instruments and therefore did not have an impact on Ambac's financial statements.

3. 

SPECIAL PURPOSE ENTITIES, INCLUDING VARIABLE INTEREST ENTITIES

Ambac, with its subsidiaries, has engaged in transactions with special purpose entities, including VIEs, in various capacities. 

•  Ambac most commonly provides financial guarantees, including credit derivative contracts, for various debt obligations issued by special 

purpose entities, including VIEs ("FG VIEs"). 

•  Ambac sponsors special purpose entities that issued notes to fund the purchase of certain financial assets. 

•  Ambac monetized its ownership of the junior surplus note issued to it by the Segregated Account by depositing the junior surplus note 
into a newly formed VIE trust in exchange for cash and an owner trust certificate, which represents Ambac's right to residual cash flows 
from the junior surplus note.

•  Ambac is an investor in collateralized debt obligations, mortgage-backed and other asset-backed securities issued by VIEs and its ownership 
interest is generally insignificant to the VIE and/or Ambac does not have rights that direct the activities that are most significant to such 
VIE. 

FG VIEs:

Ambac’s subsidiaries provide financial guarantees in respect of assets held or debt obligations of special purpose entities, including VIEs. 
Ambac’s primary variable interest exists through this financial guarantee insurance or credit derivative contract. The transaction structures 
provide  certain  financial  protection  to Ambac.  This  financial  protection  can  take  several  forms;  however,  the  most  common  are  over-
collateralization, first loss and excess spread. In the case of over-collateralization (i.e., the principal amount of the securitized assets exceeds 
the principal amount of the debt obligations guaranteed), the structure allows the transaction to experience defaults among the securitized 
assets before a default is experienced on the debt obligations that have been guaranteed by Ambac’s subsidiaries. In the case of first loss, the 
financial guarantee insurance policy or credit derivative contract only covers a senior layer of losses on assets held or debt issued by special 

| Ambac Financial Group, Inc.   98   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

purpose entities, including VIEs. The first loss with respect to the assets is either retained by the asset seller or sold off in the form of equity 
or mezzanine debt to other investors. In the case of excess spread, the securitized assets contributed to special purpose entities, including VIEs, 
generate interest cash flows that are in excess of the interest payments on the related debt; such excess cash flow is applied to redeem debt, 
thus creating over-collateralization. Generally, upon deterioration in the performance of a transaction or upon an event of default as specified 
in the transaction legal documents, Ambac will obtain certain loss remediation rights. These rights may enable Ambac to direct the activities 
of the entity that most significantly impact the entity’s economic performance. 

We determined that Ambac’s subsidiaries generally have the obligation to absorb a FG VIE's expected losses given that they have issued 
financial guarantees supporting the liabilities (and in certain cases assets). As further described below, we consolidated certain FG VIEs 
because: (i) we determined for certain transactions that experienced the aforementioned performance deterioration, that Ambac’s subsidiaries 
had the power, through voting rights or similar rights, to direct the activities that most significantly impact the VIE’s economic performance 
because certain triggers had been breached in these transactions resulting in Ambac's subsidiaries' ability to exercise certain loss remediation 
activities, or (ii) due to the passive nature of the VIEs’ activities, Ambac’s subsidiaries’ contingent loss remediation rights upon a breach of 
certain triggers in the future is considered to be the power to direct the activities that most significantly impact the VIEs’ economic performance. 
With respect to existing VIEs involving Ambac financial guarantees, Ambac is generally required to consolidate a VIE in the period that 
applicable  triggers  result  in Ambac  having  control  over  the  VIE’s  most  significant  economic  activities. As  further  discussed  in  Note  1. 
Background and Business Description, the OCI requires Ambac Assurance to obtain its approval with respect to the exercise of certain control 
rights in connection with policies that had been allocated to the Segregated Account.  Accordingly management expects the number of additional 
VIEs that may be consolidated as a result of the Segregated Account's exit from rehabilitation will be reduced and possibly eliminated.  A VIE 
is deconsolidated in the period that Ambac no longer has such control, which could occur in connection with the execution of remediation 
activities on the transaction or amortization of insured exposure, any of which may reduce the degree of Ambac’s control over a VIE.  Assets 
and liabilities of FG VIEs that are consolidated are reported  within Variable interest entity assets or Variable interest entity liabilities on the 
Consolidated  Balance  Sheets.   The  net  results  from  such  FG VIEs  are  reported  within  Income  (loss)  on  variable  interest  entities  in  the 
Consolidated Statements of Total Comprehensive Income (Loss).

Upon initial consolidation of a FG VIE, we recognize a gain or loss in earnings for the difference between: (i) the fair value of the consideration 
paid, the fair value of any non-controlling interests and the reported amount of any previously held interests and (ii) the net amount, as measured 
on a fair value basis, of the assets and liabilities consolidated. Upon deconsolidation of a FG VIE, we recognize a gain or loss for the difference 
between: (i) the fair value of any consideration received, the fair value of any retained non-controlling investment in the VIE and the carrying 
amount  of  any  non-controlling  interest  in  the VIE  and  (ii) the  carrying  amount  of  the VIE’s  assets  and  liabilities.  Gains  or  losses  from 
consolidation and deconsolidation that are reported in earnings are reported within Income (loss) on variable interest entities on the Consolidated 
Statements of Total Comprehensive Income (Loss).

The impact of consolidating such FG VIEs on Ambac’s balance sheet is the elimination of transactions between the consolidated FG VIEs 
and Ambac’s operating subsidiaries and the inclusion of the FG VIE’s third party assets and liabilities. For a financial guarantee insurance 
policy issued to a consolidated VIE, Ambac does not reflect the financial guarantee insurance policy in accordance with the related insurance 
accounting rules under the Financial Services – Insurance Topic of the ASC. Consequently, upon consolidation, Ambac eliminates the insurance 
assets  and  liabilities  associated  with  the  policy  from  the  Consolidated  Balance  Sheets.  Such  insurance  assets  and  liabilities  may  include 
premium receivables, reinsurance recoverable, deferred ceded premium, subrogation recoverable, unearned premiums, loss and loss expense 
reserves, ceded premiums payable and insurance intangible assets. For investment securities owned by Ambac that are debt instruments issued 
by the VIE, the investment securities balance is eliminated upon consolidation.

As of December 31, 2017 consolidated FG VIE assets and liabilities relating to 11 consolidated entities were $14,500,507 and $14,366,434, 
respectively.  As of December 31, 2016, consolidated FG VIE assets and liabilities relating to 12 consolidated entities were $13,367,834 and 
$13,235,425, respectively. As of December 31, 2017, eight and three consolidated FG VIEs related to transaction insured by Ambac UK and 
Ambac Assurance and eight and four as of December 31, 2016.  As of December 31, 2017 FG VIE assets and liabilities of $14,160,152 and 
$14,026,704 and as of December 31, 2016, FG VIE assets and liabilities of $12,950,009 and $12,833,466 related to transactions guaranteed 
by Ambac UK.  The remaining balance of consolidated FG VIE assets and liabilities are related to transactions guaranteed by Ambac Assurance.   
Ambac is not primarily liable for, and generally does not guarantee all of the debt obligations issued by the VIEs. Ambac would only be 
required to make payments on the VIE debt obligations in the event that the issuer of such debt obligations defaults on any principal or interest 
due and such obligation is guaranteed by Ambac. Additionally, Ambac’s general creditors, other than those specific policy holders which own 
the VIE debt obligations, do not have rights with regard to the assets of the VIEs. Ambac evaluates the net income effects and earnings per 
share effects to determine attributions between Ambac and non-controlling interests as a result of consolidating a VIE. Ambac has determined 
that the net income and earnings per share effect of these consolidated FG VIEs are attributable to Ambac’s interests through financial guarantee 
premium and loss payments with the VIE.

Below is a schedule detailing the change in fair value of the various financial instruments within the consolidated FG VIEs, along with gains 
(losses) from consolidating and deconsolidating FG VIEs, that together comprise Income (loss) on variable interest entities for for the affected 
periods:

| Ambac Financial Group, Inc.   99   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Year Ended December 31,

Income (loss) on changes related to:

Net fair value of VIE assets and liabilities

Deconsolidation

Income (loss) on Variable Interest Entities

2017

2016

2015

$

$

19,670

—

19,670

$

$

(14,093) $

—

(14,093) $

30,997

572

31,569

Ambac  deconsolidated  one,  one  and  two VIEs  for  the  years  ended  December  31,  2017,  2016  and  2015,  respectively.   These VIEs  were 
deconsolidated as a result of guaranteed bond retirements or financial guarantee policy terminations that eliminated Ambac's controlling interest 
in the entities.  The deconsolidations occurring in 2017 and 2016 were related to guaranteed bond retirements which resulted in no gain or 
loss. The gain on deconsolidation in 2015 reflected the excess of fees receivable from a financial guarantee policy termination for one VIE, 
representing Ambac's remaining non-controlling financial interest, over the fair value of net assets of the VIE at deconsolidation.  

The table below provides the fair value of fixed income securities, by asset-type, held by consolidated VIEs as of December 31, 2017 and 
2016: 

December 31,

Investments:

Corporate obligations

Total variable interest entity assets: fixed income securities

2017

2016

$

$

2,914,145

2,914,145

$

$

2,622,566

2,622,566

The following table provides supplemental information about the loans held as assets and long-term debt associated with the VIEs for which 
the fair value option has been elected as of December 31, 2017 and 2016:

December 31, 2017:

Loans

Long-term debt

December 31, 2016:

Loans

Long-term debt

Ambac Sponsored VIEs:

Estimated fair
value

Unpaid principal
balance

$

11,529,384

$

12,160,544

10,658,963

$

11,155,936

$

8,168,651

9,387,884

7,641,756

8,854,530

A subsidiary of Ambac transferred financial assets to a special purpose entity. The business purpose of this entity was to provide certain 
financial  guarantee  clients  with  funding  for  their  debt  obligations. This  special  purpose  entity  was  established  as  a  separate legal  entity, 
demonstrably distinct from Ambac and that Ambac, its affiliates or its agents could not unilaterally dissolve. The permitted activities of this 
entity are contractually limited to purchasing assets from Ambac, issuing medium-term notes ("MTNs") to fund such purchases, executing 
derivative hedges and obtaining financial guarantee policies with respect to indebtedness incurred.  Ambac does not consolidate this entity 
because Ambac Assurance’s policies issued to it were allocated to the Segregated Account, thereby limiting Ambac’s control over the entity's 
most significant economic activities. Pursuant to the Stipulation and Order (described in Note 1. Background and Business Description), 
Ambac's exercise of certain control rights with respect to former Segregated Account policies will continue to be subject to approval by OCI. 
Ambac has elected to account for its equity interest in this entity at fair value under the fair value option in accordance with the Financial 
Instruments Topic of the ASC. We believe that the fair value of the investments in this entity provides for greater transparency for recording 
profit or loss as compared to the equity method under the Investments – Equity Method and Joint Ventures Topic of the ASC. Refer to Note 
9. Fair Value Measurements for further information on the valuation technique and inputs used to measure the fair value of Ambac’s equity 
interest in this entity. At December 31, 2017 and 2016 the fair value of this entity was $5,979 and $7,382, respectively, and is reported within 
Other assets on the Consolidated Balance Sheets.

•  Total principal amount of debt outstanding was $420,600 and $388,950 at December 31, 2017 and 2016, respectively. In each case, 
Ambac sold assets to this entity. The assets are composed of utility obligations with a weighted average rating of BBB+ at December 31, 
2017 and weighted average life of 3.1 years.  The purchase by this entity of financial assets was financed through the issuance of MTNs, 
which are cross-collateralized by the purchased assets. The MTNs have the same expected weighted average life as the purchased assets. 
Derivative contracts (interest rate swaps) are used within the entity for economic hedging purposes only. Derivative positions were 
established at the time MTNs were issued to purchase financial assets. As of December 31, 2017, all fixed-income securities owned, 
MTNs outstanding and payments due under derivative contracts were guaranteed under financial guarantee insurance policies issued by 
Ambac Assurance or Ambac UK.

| Ambac Financial Group, Inc.   100   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

•  Insurance premiums paid to Ambac Assurance and Ambac UK by this entity are earned in a manner consistent with other insurance 
policies, over the risk period. Additionally, any losses incurred on such insurance policies are included in Ambac’s Consolidated Statements 
of Total Comprehensive Income (Loss). Under the terms of an Administrative Agency Agreement, Ambac provides certain administrative 
duties, primarily collecting amounts due on the obligations and making interest payments on the MTNs.

In July 2015, Ambac Assurance entered into a secured borrowing transaction whereby it sold 17 Ambac insured residential mortgage-backed 
securities (the "Securities") and all rights associated therewith as of May 31, 2015, to a Delaware statutory trust (the "Trust") in exchange for 
an equity certificate in the Trust, all financial guarantee claim payments associated with the Securities and cash of $146,000 (prior to expenses 
associated with the transaction).  Although the Securities were legally sold to the Trust, the Securities will remain in fixed income securities  
on the Consolidated Balance Sheets.  The Securities had par and fair value of $293,409 and $346,212 as of December 31, 2017, respectively.  
Refer to Note 10. Investments for further discussion of the restrictions on the invested assets.  At the same time, a second Delaware statutory 
trust (the "Issuer"), issued $146,000 of debt securities and used the proceeds, together with an equity certificate of the Issuer, to purchase from 
the Trust a certificate secured by and entitling the Issuer to all principal and interest payments (other than financial guarantee claim payments) 
on the Securities. Interest on the debt securities is payable monthly at an annual rate of one month LIBOR + 2.8%.  Both the Trust and the 
Issuer are consolidated VIEs because Ambac Assurance was involved in their design and holds a significant amount of the beneficial interests 
issued by the VIEs or guaranteed the assets held by the VIEs. VIE debt outstanding to third parties under this secured borrowing transaction 
had a carrying value of $73,993 and $102,403 as of December 31, 2017 and 2016, respectively, and is reported in Long-Term Debt on the 
Consolidated Balance Sheets.

Variable Interests in Non-Consolidated VIEs

On August 28, 2014, Ambac monetized its ownership of the junior surplus note issued to it by the Segregated Account by depositing the junior 
surplus note into a newly formed VIE trust in exchange for cash and an owner trust certificate, which represents Ambac's right to residual cash 
flows from the junior surplus notes.  Ambac does not consolidate the VIE.  Ambac reports its interest in the VIE as an equity investment within 
Other investments on the Consolidated Balance Sheets with associated results from operations included within Net investment income: Other 
investments on the Consolidated Statements of Total Comprehensive Income (Loss).  The equity investment had a carrying value of $34,941
and $30,003 as of December 31, 2017 and 2016, respectively.  Additionally, at December 31, 2017 Ambac held $35,000 of the debt issued by 
this VIE.

| Ambac Financial Group, Inc.   101   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The following table displays the carrying amount of the assets, liabilities and maximum exposure to loss of Ambac’s variable interests in non-
consolidated VIEs resulting from financial guarantee and derivative contracts by major underlying asset classes, as of December 31, 2017 and 
2016:

Carrying Value of Assets and Liabilities

Maximum
Exposure
To Loss (1)

Insurance
Assets (2)

Insurance
Liabilities (3)

Net Derivative
Assets 
(Liabilities) (4)

December 31, 2017:

Global structured finance:

Collateralized debt obligations

Mortgage-backed—residential

Other consumer asset-backed

Other commercial asset-backed

Other

Total global structured finance

Global public finance

Total

December 31, 2016:

Global structured finance:

Collateralized debt obligations

Mortgage-backed—residential

Other consumer asset-backed

Other commercial asset-backed

Other

Total global structured finance

Global public finance

Total

$

35,555

$

169

$

1

$

12,766,685

2,266,610

987,797

2,513,304

18,569,951

25,629,816

619,848

23,405

30,413

60,086

733,921

335,347

3,218,356

328,732

35,976

306,457

3,889,522

371,056

44,199,767

$

1,069,268

$

4,260,578

$

(15)

—

—

—

10,311

10,296

(551)

9,745

761,451

$

218

$

3,319

$

(145,402)

14,859,909

2,391,604

1,686,256

2,963,521

22,662,741

25,608,471

725,106

26,758

66,277

66,091

884,450

338,587

3,118,892

302,335

64,961

412,929

3,902,436

359,142

$

48,271,212

$

1,223,037

$

4,261,578

$

—

—

—

13,347

(132,055)

(8,827)

(140,882)

$

$

(1)  Maximum exposure to loss represents the maximum future payments of principal and interest on insured obligations and derivative contracts plus Deferred 
Amounts and accrued and unpaid interest thereon. Ambac’s maximum exposure to loss does not include the benefit of any financial instruments (such as 
reinsurance or hedge contracts) that Ambac may utilize to mitigate the risks associated with these variable interests.

(2) 

(3) 

Insurance assets represent the amount recorded in “Premium receivables” and “Subrogation recoverable” for financial guarantee contracts on Ambac’s 
Consolidated Balance Sheets.

Insurance liabilities represent the amount recorded in “Loss and loss expense reserves” and “Unearned premiums” for financial guarantee contracts on 
Ambac’s Consolidated Balance Sheets.

(4)  Net derivative assets (liabilities) represent the fair value recognized on credit derivative contracts and interest rate swaps on Ambac’s Consolidated Balance 

Sheets.

| Ambac Financial Group, Inc.   102   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

4. 

COMPREHENSIVE INCOME 

The following tables detail the changes in the balances of each component of accumulated other comprehensive income for the affected periods:

Unrealized Gains
(Losses) on
Available- for
Sale Securities (1)

Amortization of
Postretirement
Benefit (1)

Gain (Loss) on
Foreign Currency
Translation (1)

Total

Year Ended December 31, 2017:

Beginning Balance

Other comprehensive income before reclassifications

Amounts reclassified from accumulated other

comprehensive income

Adjustment to initially adopt ASU 2018-02

Net current period other comprehensive income

Balance at December 31, 2017

Year ended December 31, 2016:

Beginning Balance

Other comprehensive income before reclassifications

Amounts reclassified from accumulated other

comprehensive income

Net current period other comprehensive income (loss)

Balance at December 31, 2016

$

$

$

$

9,367

$

2,625

(167,220) $

73,586

118,863

$

(96,325)

14,805

(6,588)

(88,108)

(1,352)

—

1,273

30,755

$

10,640

$

50,963

$

85,378

(17,478)

67,900

9,344

$

1,041

(1,018)

23

—

—

73,586

(93,634) $

(45,092) $

(122,128)

—

(122,128)

(38,990)

(20,114)

13,453

(6,588)

(13,249)

(52,239)

15,215

(35,709)

(18,496)

(54,205)

(38,990)

118,863

$

9,367

$

(167,220) $

(1)  All amounts are net of tax and noncontrolling interest. Amounts in parentheses indicate debits. 

The following table details the significant amounts reclassified from each component of accumulated other comprehensive income for the 
affected periods:

Details about Accumulated Other
Comprehensive Income Components

Unrealized Gains (Losses) on Available-for-Sale

Securities

Amortization of Postretirement Benefit

Prior service cost

Actuarial gains (losses)

Total reclassifications for the period

Amount Reclassified from Accumulated
Other Comprehensive Income (1)

Year Ended December 31,

2017

2016

Affected Line Item in the
Consolidated Statement of
Total Comprehensive Income

$

$

$

$

14,805

—

14,805

$

$

(963) $

(389)

(1,352)

—

(1,352)

13,453

$

(17,478) Net realized investment gains

— Tax (expense) benefit

(17,478) Net of tax and noncontrolling interest (3)

(666) Underwriting and operating expenses (2)
(352) Underwriting and operating expenses (2)

(1,018) Total before tax

— Tax (expense) benefit

(1,018) Net of tax and noncontrolling interest (3)
(18,496) Net of tax and noncontrolling interest (3)

(1)  Amounts in parentheses indicate debits to the Consolidated Statement of Comprehensive Income.

(2)  These accumulated other comprehensive income components are included in the computation of net periodic benefit cost.

(3)  Amount agrees with amount reported as reclassifications from AOCI in the disclosure about changes in AOCI balances.

| Ambac Financial Group, Inc.   103   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

5. 

NET INCOME PER SHARE 

On May 1, 2013, pursuant to the Second Modified Fifth Amended Plan of Reorganization of Ambac (the "Reorganization Plan"), 45,000,000
shares of new common stock at par value of $0.01 per share and 5,047,138 warrants were issued. Warrants entitled such holders to acquire up 
to 5,047,138 shares of new common stock at an exercise price of $16.67 per share at any time on or prior to April 30, 2023. For the years 
ended December 31, 2017, 2016 and 2015, 0, 136, and 740, warrants, respectively, were exercised, resulting in an issuance of 0, 136 and 236
shares of common stock. 

On June 30, 2015, the Board of Directors of Ambac authorized the establishment of a warrant repurchase program that permits the repurchase 
of up to $10,000 of warrants.  On November 3, 2016, the Board of Directors of Ambac authorized a $10,000 increase to the warrant repurchase 
program.  For the year ended December 31, 2017, Ambac repurchased 0 warrants at a cost of $0. As of December 31, 2017, Ambac had 
repurchased 985,331 warrants at a cost of  $8,092, (average cost of $8.21 per warrant), leaving 4,053,670 warrants outstanding. The remaining 
aggregate authorization at December 31, 2017 is $11,939. 

The following table provides a reconciliation of the common shares used for basic net income per share to the diluted shares used for diluted 
net income per share:

Year Ended December 31,

Basic weighted average shares outstanding
Effect of potential dilutive shares(1):

Warrants

Stock options

Restricted stock units

Performance stock units

2017

2016

2015

45,367,932

45,212,414

45,173,542

—

—

—

—

312,619

447

116,105

81,939

809,834

5,313

14,221

3,117

Diluted weighted average shares outstanding

45,367,932

45,723,524

46,006,027

Anti-dilutive shares excluded from the above reconciliation

Stock options

Warrants

Restricted stock units
Performance stock units (2)

126,667

4,053,670

68,654

322,943

110,000

110,000

—

—

—

—

—

—

(1)  For the year ended December 31, 2017, Ambac has a net loss and accordingly excluded all potentially dilutive securities from the determination of diluted 

loss per share as their impact was anti-dilutive.

(2)  Performance stock units are reflected herein at their target issuance amounts.  Vesting of these units is contingent upon meeting certain performance 
metrics.  Although a portion of these performance metrics have been achieved as of the respective period end, it is possible that awards may no longer 
meet the metric at the end of the performance period.

6. 

FINANCIAL GUARANTEES IN FORCE 

Financial guarantees outstanding includes the exposures of policies that insure variable interest entities (“VIEs”) consolidated in accordance 
with ASC Topic 810, Consolidation. Financial guarantees outstanding includes the exposure of policies that insure capital appreciation bonds 
which are reported at the par amount at the time of issuance of the insurance policy as opposed to the current accreted value of the bonds.  
Financial guarantees outstanding exclude the exposures of policies that insure bonds which have been called, pre-refunded or refunded. The 
gross par amount of financial guarantees outstanding was $67,140,000 and $86,373,000 at December 31, 2017 and 2016, respectively. The 
par  amount  of  financial  guarantees  outstanding,  net  of  reinsurance,  was  $62,716,000  and  $79,346,000  at  December  31,  2017  and  2016, 
respectively. 

| Ambac Financial Group, Inc.   104   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

As of December 31, 2017 and 2016, the guarantee portfolio was diversified by type of guaranteed bond as shown in the following table: 

Net Par Outstanding December 31,

Public Finance:

Lease and tax-backed revenue

Housing revenue

General obligation

Utility revenue

Transportation revenue

Higher education

Health care revenue

Other

Total Public Finance

Structured Finance:

Mortgage-backed and home equity

Investor-owned utilities

Student loan
Asset-backed (1)

CDOs

Other

Total Structured Finance

International Finance:

Investor-owned and public utilities

Sovereign/sub-sovereign
Asset-backed (1)

Transportation

Mortgage-backed and home equity

CDOs

Other

Total International Finance

Total

2017

2016

$

11,893,000

$

15,688,000

6,312,000

6,257,000

2,212,000

2,002,000

1,642,000

807,000

963,000

6,508,000

9,867,000

4,298,000

3,860,000

2,339,000

1,484,000

1,018,000

32,088,000

45,062,000

7,267,000

3,274,000

1,238,000

443,000

33,000

1,561,000

13,816,000

5,696,000

5,664,000

2,609,000

1,777,000

246,000

—

820,000

16,812,000

$

62,716,000

$

9,383,000

3,833,000

1,388,000

565,000

132,000

1,650,000

16,951,000

6,168,000

5,211,000

2,951,000

1,700,000

254,000

186,000

863,000

17,333,000

79,346,000

(1)  At December 31, 2017 and 2016, all asset-backed net par amounts outstanding relate to commercial asset-based transactions. 

As of December 31, 2017 and 2016, the International Finance guaranteed portfolio by location of risk was as outlined in the table below: 

Net Par Outstanding December 31,

United Kingdom

Italy

Austria

Australia

France
Internationally diversified (1)

Other international

Total International Finance

2017

2016

$

13,554,000

$

12,798,000

877,000

770,000

608,000

329,000

368,000

306,000

898,000

696,000

1,393,000

286,000

648,000

614,000

$

16,812,000

$

17,333,000

(1) 

Internationally diversified obligations represent pools of geographically diversified exposures which may include components of U.S. exposure. 

Gross financial guarantees in force (principal and interest) were $108,550,000 and $137,745,000 at December 31, 2017 and 2016, respectively. 
Net financial guarantees in force (after giving effect to reinsurance) were $101,223,000 and $126,306,000 as of December 31, 2017 and 2016, 
respectively. 

In the United States, California, New York and New Jersey were the states with the highest aggregate net par amounts in force, accounting 
for 10.1%, 5.8% and 5.2% of the total at December 31, 2017, respectively. No other state accounted for more than 5.0%. The highest single 
insured risk represented 2.6% of the aggregate net par amount guaranteed.

| Ambac Financial Group, Inc.   105   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

7. 

FINANCIAL GUARANTEE INSURANCE CONTRACTS 

Amounts presented in this Note relate only to Ambac’s non-derivative insurance business for insurance policies issued to beneficiaries, including 
VIEs, for which we do not consolidate the VIE.

Net Premiums Earned:

Below is the gross premium receivable roll-forward (direct and assumed contracts) for the affected periods:

Year Ended December 31,

Beginning premium receivable

Premium receipts

Adjustments for changes in expected and contractual cash flows

Accretion of premium receivable discount

Changes to uncollectable premiums

Other adjustments (including foreign exchange)

Ending premium receivable (1)

2017

2016

2015

$

661,337

$

831,575

$

1,000,607

(81,597)

(30,334)

16,162

(141)

20,885

(77,038)

(78,528)

18,637

6,054

(39,363)

$

586,312

$

661,337

$

(108,029)

(64,740)

24,628

2,540

(23,431)

831,575

(1)  Gross premium receivable includes premiums to be received in foreign denominated currencies most notably in British Pounds and Euros.  At  December 
31, 2017, 2016 and 2015 premium receivables include British Pounds of $151,852 (£112,342), $177,878 (£144,393) and $226,994 (£154,135), respectively, 
and Euros of $36,001 (£29,976),  $34,866 (€33,108) and $43,451 (€40,014), respectively. 

In structured finance transactions, the priority for the payment of financial guarantee premiums to Ambac, as required by bond indentures of 
insured structured finance obligations, is generally senior in the waterfall. Additionally, trustees and other parties are required under the Second 
Amended Plan of Rehabilitation and related court orders to continue to pay installment premiums, notwithstanding the Segregated Account 
Rehabilitation  Proceedings.  In  evaluating  the  credit  quality  of  the  premium  receivables,  management  evaluates  the  transaction  waterfall 
structures and the internal ratings of the transactions underlying the premium receivables. Uncollectable premiums are determined on a policy 
basis and utilize a combination of historical premium collection data in addition to cash flow analysis to determine if an impairment in the 
related policy's premium receivables exist.  At December 31, 2017 and 2016, $9,331 and $9,186 respectively, of premium receivables were 
deemed uncollectable.  As of December 31, 2017 and 2016, approximately 22% and 25%, respectively, of the premium receivables relate to 
transactions with non-investment grade internal ratings, comprised mainly of structured finance transactions, which comprised 16% and  16%
of total premium receivables at December 31, 2017 and 2016, respectively.  Past due premiums on policies insuring non-investment grade 
obligations amounted to less than $500 at December 31, 2017.

The effect of reinsurance on premiums written and earned was as follows:

2017

2016

2015

Year Ended December 31,

Written

Earned

Written

Earned

Written

Earned

Direct

Assumed

Ceded

Net premiums

$

$

(14,313) $

190,496

$

(53,837) $

215,564

$

(37,572) $

336,025

—

(2,104)

106

15,325

—

(8,772)

85

18,362

—

(3,001)

(12,209) $

175,277

$

(45,065) $

197,287

$

(34,571) $

87

23,517

312,595

Ambac’s accelerated premium revenue for retired obligations for the years ended December 31, 2017, 2016 and 2015, was $64,494, $52,416
and $137,400, respectively.

The following table summarizes net premiums earned by location of risk:

Year Ended December 31,

United States

United Kingdom

Other international

Total

2017

2016

2015

$

$

134,099

$

168,646

$

32,928

8,250

24,470

4,171

175,277

$

197,287

$

229,658

68,799

14,138

312,595

| Ambac Financial Group, Inc.   106   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The  table  below  summarizes  the  future  gross  undiscounted  premiums  to  be  collected  and  future  premiums  earned,  net  of  reinsurance  at 
December 31, 2017:

Three months ended:

March 31, 2018

June 30, 2018

September 30, 2018

December 31, 2018

Twelve months ended:

December 31, 2019

December 31, 2020

December 31, 2021

December 31, 2022

Five years ended:

December 31, 2027

December 31, 2032

December 31, 2037

December 31, 2042

December 31, 2047

December 31, 2052

December 31, 2057

Total

Future 
Premiums
to be
Collected (1)

Future
Premiums 
to be
Earned Net of
Reinsurance (1)

$

16,923

$

13,801

14,779

13,282

55,203

52,282

45,848

43,678

193,190

150,385

82,597

29,169

13,599

3,586

92

17,561

17,294

16,604

16,150

61,368

57,263

52,149

48,447

197,446

131,682

72,520

24,833

12,694

4,651

298

$

728,414

$

730,960

(1)  Future premiums to be collected are undiscounted and are used to derive the discounted premium receivable asset recorded on Ambac's balance sheet.  
Future premiums to be earned, net of reinsurance relate to the unearned premiums liability and deferred ceded premium asset recorded on Ambac’s balance 
sheet. The use of contractual lives for many bond types which do not have homogeneous pools of underlying collateral is required in the calculation of 
the premium receivable as further described in Note 2. Basis of Presentation and Significant Accounting Policies.  This results in a different premium 
receivable balance than if expected lives were considered. If installment paying policies are retired or prepay early, premiums reflected in the premium 
receivable asset and amounts reported in the above table for such policies may not be collected.  Future premiums to be earned also considers the use of 
contractual lives for many bond types which do not have homogeneous pools of underlying collateral, which may result in different unearned premium 
than if expected lives were considered.  If those bonds types are retired early, premium earnings may be negative in the period of call or refinancing.

Loss and Loss Expense Reserves:

A loss reserve is recorded on the balance sheet on a policy-by-policy basis as further described in Note 2. Basis of Presentation and Significant 
Accounting Policies.  Below are the components of the Loss and loss expense reserves liability and the Subrogation recoverable asset at 
December 31, 2017 and 2016:

Balance Sheet Line Item

Claims

Accrued
Interest

Claims and
Loss Expenses

Recoveries

Unearned
Premium
Revenue

Gross Loss and
Loss Expense
Reserves

Unpaid Claims

Present Value of Expected
Net Cash Flows

December 31, 2017:

Loss and loss expense reserves

Subrogation recoverable

Totals

December 31, 2016:

Loss and loss expense reserves

Subrogation recoverable

Totals

$

$

$

$

2,411,632

615,391

3,027,023

2,411,105

583,042

2,994,147

$

$

$

$

667,988

171,755

839,743

529,703

132,139

661,842

$

$

$

$

2,855,010

102,171

2,957,181

2,681,198

68,419

2,749,617

$

$

$

$

(1,054,113) $

(135,502) $

4,745,015

(1,520,530)

—

(631,213)

(2,574,643) $

(135,502) $

4,113,802

(1,098,096) $

(143,141) $

4,380,769

(1,468,331)

—

(684,731)

(2,566,427) $

(143,141) $

3,696,038

| Ambac Financial Group, Inc.   107   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Below is the loss and loss expense reserve roll-forward, net of subrogation recoverable and reinsurance, for the affected periods.

Year Ended December 31,

Beginning gross loss and loss expense reserves

Reinsurance recoverable

Beginning balance of net loss and loss expense reserves

Losses and loss expenses (benefit) incurred:

Current year

Prior years

Total (1)(2)

Loss and loss expenses (recovered) paid:

Current year

Prior years

Total

Foreign exchange effect

Ending net loss and loss expense reserves
Reinsurance recoverable (3)
Ending gross loss and loss expense reserves (4)

2017

2016

2015

3,696,038

30,767

3,665,271

$

$

2,858,813

44,059

2,814,754

$

$

3,798,733

100,355

3,698,378

5,691

507,495

513,186

825

133,427

134,252

28,939

6,675

(18,164)

(11,489)

5,371

(944,955)

(939,584)

(77,578)

4,073,144

40,658

4,113,802

$

$

3,665,271

30,767

3,696,038

$

$

1,183

(769,890)

(768,707)

—

90,086

90,086

(24,831)

2,814,754

44,059

2,858,813

$

$

$

$

(1)  Total losses and loss expenses (benefit) includes $(20,348), $5,421 and $47,085 for the years ended December 31, 2017, 2016 and 2015, respectively, 

related to ceded reinsurance.

(2)  Ambac records the impact of estimated recoveries related to securitized loans in RMBS transactions that breached certain R&Ws within losses and loss 
expenses (benefit).  The losses and loss expense (benefit) incurred associated with changes in estimated representation and warranties for the year ended 
December 31, 2017, 2016 and 2015 was $72,003, $(71,369) and $(303,633), respectively.

(3)  Represents reinsurance recoverable on future loss and loss expenses.  Additionally, the Balance Sheet line "Reinsurance recoverable on paid and unpaid 
losses" includes reinsurance recoverables (payables) of $339, $(349) and $(60) as of December 31, 2017, 2016 and 2015, respectively, related to previously 
presented loss and loss expenses and subrogation.

(4) 

Includes Euro denominated gross loss and loss expense reserves of $21,116 (€17,582), $21,375 (€20,297) and $19,019 (€17,515) at December 31, 2017, 
2016 and 2015, respectively.

For 2017, the net adverse development in prior years was primarily the result of negative development in certain public finance transactions, 
including Puerto Rico, and interest accrued on Deferred Amounts partially offset by positive developments in certain Ambac UK transactions, 
including a benefit related to a confidential settlement of litigation brought by Ambac UK in the name of Ballantyne Re plc ("Ballantyne").  

• 

Puerto Rico

Ambac has exposure to the Commonwealth of Puerto Rico (the  "Commonwealth") and its instrumentalities across several different 
issuing entities.  Each has its own credit risk profile attributable to discrete revenue sources, direct general obligation pledges and 
general obligation guarantees.  The Commonwealth of Puerto Rico and certain of its instrumentalities have and will continue to 
default on debt service payments, including payments owed on bonds insured by Ambac Assurance. Ambac Assurance may be 
required to make significant amounts of policy payments over the next several years, the recoverability of which is subject to great 
uncertainty, which may lead to material permanent losses. Our exposure to Puerto Rico is impacted by the amount of monies available 
for debt service, which is in turn affected by variability in economic growth, tax revenues, essential services expense as well as 
federal funding of Commonwealth needs. In addition, our exposure to Puerto Rico is impacted by the significant damage to the 
Commonwealth that was inflicted by Hurricane Maria, which made landfall on September 20, 2017, as well as Hurricane Irma, 
which passed just north of the island on September 6, 2017. The longer term recovery of the economy of the Commonwealth and 
its essential infrastructure will likely be highly dependent on the amount, timing and effectiveness of Federal aid. 

Substantial uncertainty also exists with respect to the ultimate outcome for creditors in Puerto Rico due to legislation enacted by 
the Commonwealth and the United States, including PROMESA, as well as actions taken in reliance on such laws, including Title 
III filings.  Ambac Assurance is involved in multiple litigations relating to such actions and other issues and may not be successful 
in pursuing claims or protecting its interests.  Ambac Assurance is also participating in a mediation process with respect to potential 
debt restructurings.  Mediation may not be productive or may not resolve Ambac Assurance's claims in a manner that avoids significant 
losses. It is possible that certain restructuring process solutions, together with associated legislation, budgetary, and/or public policy 
proposals could be adopted and could significantly or further impair our exposures. 

While  our  reserving  scenarios  reflect  a  wide  range  of  possible  outcomes  reflecting  the  significant  uncertainty  regarding  future 
developments and outcomes, given our exposure to Puerto Rico and the economic, fiscal, legal and political uncertainties associated 

| Ambac Financial Group, Inc.   108   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

therewith as well as the uncertainties emanating from the damage caused by hurricanes Maria and Irma, our loss reserves may 
ultimately prove to be insufficient to cover our losses, potentially by a material amount, and may be subject to material volatility.

Ambac has considered these developments and other factors in evaluating its Puerto Rico loss reserves.  During the year ended 
December 31, 2017, Ambac had incurred losses associated with its Domestic Public Finance insured portfolio of $476,303, which 
was significantly impacted by the continued uncertainty and volatility of the situation in Puerto Rico.  While management believes 
its reserves are adequate to cover losses in its Public Finance insured portfolio, there can be no assurance that Ambac may not incur 
additional losses in the future, particularly given the developing economic, political, and legal circumstances in Puerto Rico.  Such 
additional losses may have a material adverse effect on Ambac’s results of operations and financial condition.   For public finance 
credits, including Puerto Rico, as well as other issuers, for which Ambac has an estimate of expected loss at December 31, 2017, 
the possible increase in loss reserves under stress or other adverse conditions and circumstances was estimated to be approximately 
$1,500,000.  However, there can be no assurance that losses may not exceed such amount. 

• 

Ballantyne Litigation

On March 25, 2017, Ambac UK agreed in principle to a confidential settlement of litigation brought by Ambac UK in the name of 
Ballantyne against J.P. Morgan Investment Management Inc. ("JPMIM") relating to the management of Ballantyne’s investment 
accounts, which were funded with the proceeds of notes issued in 2006 in connection with a structured reinsurance transaction and 
guaranteed in part by Ambac UK.  On April 11, 2017, Ambac UK, Ballantyne and JPMIM signed a settlement agreement. Pursuant 
to the settlement, Ballantyne received a payment of $325,600 from JPMIM in return for releases of all claims by Ballantyne and 
Ambac UK. As a result of the settlement, Ambac recognized an incremental benefit through a reduction in losses and loss expenses 
of approximately $91,600 in the first quarter of 2017. Ambac had previously included an estimated benefit through a reduction of 
loss and loss expense reserves of approximately $53,000 related to our probability weighted estimate of the value of the litigation. 
The total $144,600 benefit recognized from the settlement of the litigation will reduce the ultimate Ballantyne claims Ambac UK 
is expecting to pay and not result in a direct cash payment to Ambac UK.

For 2016, the net positive development in prior years was primarily the result of lower projected losses in the RMBS portfolio due to improved 
deal performance and higher representation and warranty subrogation recoveries, and the impact of executed commutations in the student loan 
portfolio.  This is partially offset by negative development in Puerto Rico, the adverse impact of foreign currency rate movements on the 
Ambac UK portfolio and interest accrued on Deferred Amounts.

For 2015, the net positive development in prior years was primarily due to increases in our estimate of RMBS R&W recoveries as a result of 
continuous efforts and ongoing assessments of the value of our claims, as well as declines in interest rates on RMBS, student loans and Ambac 
UK credits, reduced claims expectations for an Ambac UK transaction resulting from proactive remediation efforts and the impact of executed 
commutations in the student loan portfolio.  This was partially offset by negative development in Puerto Rico, the adverse impact of foreign 
currency rate movements on the Ambac UK portfolio and interest accrued on Deferred Amounts.

| Ambac Financial Group, Inc.   109   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The tables below summarize information related to policies currently included in Ambac’s loss and loss expense reserves or subrogation 
recoverable at December 31, 2017 and 2016. Gross par exposures include capital appreciation bonds which are reported at the par amount at 
the time of issuance of the insurance policy as opposed to the current accreted value of the bond.  The weighted average risk-free rate used to 
discount loss reserves at December 31, 2017 and 2016 was 2.5% and 2.7%, respectively.

Number of policies

Remaining weighted-average contract 
period (in years) (1)

Gross insured contractual payments

outstanding:

Principal

Interest

Total
Gross undiscounted claim liability (2)
Discount, gross claim liability

Gross claim liability before all subrogation

and before reinsurance

Less:

Gross RMBS subrogation (3)
Discount, RMBS subrogation

Discounted RMBS subrogation, before

reinsurance

Less:

Gross other subrogation (4)
Discount, other subrogation

Discounted other subrogation, before

reinsurance

Gross claim liability, net of all subrogation

and discounts, before reinsurance

Less: Unearned premium revenue

Plus: Loss expense reserves
Gross loss and loss expense reserves

Reinsurance recoverable reported on 
Balance Sheet (5)

$

$

$

I

IA

Surveillance Categories as of December 31, 2017
V

III

IV

II

26

10

20

23

26

10

22

24

179

13

Total

277

17

4

4

$ 1,046,267

$

531,190

$ 1,199,909

$ 1,998,861

$ 6,862,281

531,657

584,098

413,045

7,182,715

2,469,765

$ 1,577,924
4,434
$

$ 1,115,288
56,659
$

$ 1,612,954
77,289
$

$ 9,181,576
$ 1,412,976

$ 9,332,046
$ 6,409,340

$

$
$

48,562

$11,687,070

16,332

64,894
64,863

11,197,612

$22,884,682
$ 8,025,561

(465)

(13,095)

(12,250)

(643,897)

(616,559)

(4,739)

(1,291,005)

$

3,969

$

43,564

$

65,039

$

769,079

$ 5,792,781

$

60,124

$ 6,734,556

—

—

—

—

—

—

—

—

—

—

—

—

— (1,857,502)

—

23,115

— (1,857,502)

—

23,115

— (1,834,387)

— (1,834,387)

(7,990)

5,169

(9,371)

2,550

(53,070)

(743,456)

(13,191)

(827,078)

8,349

67,045

3,709

86,822

(2,821)

(6,821)

(44,721)

(676,411)

(9,482)

(740,256)

3,969

$

40,743

$

58,218

$

724,358

$ 3,281,983

$

50,642

$ 4,159,913

(2,126)

16,116
17,959

202

$

$

(9,990)

3,242
33,995

4,894

$

$

(12,238)

665
46,645

9,424

$

$

(46,086)

13,331
691,603

(64,786)

(276)

(135,502)

56,037
$ 3,273,234

$

—
50,366

89,391
$ 4,113,802

38,465

$

(11,988) $

— $

40,997

(1)  Remaining weighted-average contract period is weighted based on projected gross claims over the lives of the respective policies.

(2)  Gross undiscounted claim liability includes unpaid claims, including accrued interest on Deferred Amounts, on policies allocated to the Segregated Account 

and Ambac's estimate of expected future claims.

(3)  RMBS subrogation represents Ambac’s estimate of subrogation recoveries from RMBS transaction sponsors for representation and warranty ("R&W") 

breaches.

(4)  Other subrogation represents subrogation related to excess spread and other contractual cash flows on public finance and structured finance transactions 

including RMBS.

(5)  Reinsurance recoverable reported on Balance Sheet includes reinsurance recoverables of $40,658 related to future loss and loss expenses and $339 related 

to presented loss and loss expenses and subrogation.

| Ambac Financial Group, Inc.   110   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Number of policies

Remaining weighted-average contract 
period (in years) (1)

Gross insured contractual payments

outstanding:

Principal

Interest

Total
Gross undiscounted claim liability (2)

Discount, gross claim liability

Gross claim liability before all subrogation
and before reinsurance

Less:

Gross RMBS subrogation (3)

Discount, RMBS subrogation

Discounted RMBS subrogation, before

reinsurance

Less:

Gross other subrogation (4)

Discount, other subrogation

Discounted other subrogation, before

reinsurance

Gross claim liability, net of all subrogation

and discounts, before reinsurance

Less: Unearned premium revenue

Plus: Loss expense reserves

Gross loss and loss expense reserves

Reinsurance recoverable reported on 
Balance Sheet (5)

$

$

$

$

$

Surveillance Categories as of December 31, 2016

I

IA

II

III

IV

V

Total

19

9

22

8

26

30

43

17

169

14

3

5

282

16

$

918,456

345,802

$ 1,264,258

3,439

(314)

$

$

$

733,036

$ 1,992,543

$ 1,779,889

$ 7,926,991

199,631

7,080,969

1,110,051

2,275,421

932,667

$ 9,073,512

$ 2,889,940

$10,202,412

21,175

$

547,550

$

861,455

$ 6,139,060

$

$

$

49,247

$13,400,162

14,185

11,026,059

63,432

$24,426,221

63,431

$ 7,636,110

(1,243)

(331,234)

(256,108)

(710,608)

(5,859)

(1,305,366)

3,125

$

19,932

$

216,316

$

605,347

$ 5,428,452

$

57,572

$ 6,330,744

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

— (1,926,165)

— (1,926,165)

—

19,130

—

19,130

— (1,907,035)

— (1,907,035)

(14,529)

(118,272)

(593,919)

(12,751)

(739,471)

6,526

13,426

56,273

3,854

80,079

(8,003)

(104,846)

(537,646)

(8,897)

(659,392)

3,125

$

19,932

$

208,313

$

500,501

$ 2,983,771

$

48,675

$ 3,764,317

(2,394)

(1,807)

(49,578)

6,621

7,352

120

$

$

339

18,464

6,063

$

$

777

159,512

2,737

$

$

(31,785)

11,036

(57,194)

56,089

(383)

(143,141)

—

74,862

479,752

$ 2,982,666

$

48,292

$ 3,696,038

39,352

$

(17,854) $

— $

30,418

(1)  Remaining weighted-average contract period is weighted based on projected gross claims over the lives of the respective policies.

(2)  Gross undiscounted claim liability includes unpaid claims, including accrued interest on Deferred Amounts, on policies allocated to the Segregated Account 

and Ambac's estimate of expected future claims.

(3)  RMBS subrogation represents Ambac’s estimate of subrogation recoveries from RMBS transaction sponsors for R&W breaches.

(4)  Other subrogation represents subrogation related to excess spread and other contractual cash flows on public finance and structured finance transactions, 

including RMBS.

(5)  Reinsurance recoverable reported on Balance Sheet includes reinsurance recoverables of $30,767 related to future loss and loss expenses and $(349)

related to presented loss and loss expenses and subrogation.

Representation and Warranty Recoveries:

Ambac records estimated subrogation recoveries for breaches of R&Ws by sponsors of certain RMBS transactions.  For a discussion of the   
approach utilized to estimate R&W subrogation recoveries, see Note 2. Basis of Presentation and Significant Accounting Policies.  R&W 
subrogation may include estimates of potential sponsor settlements, but have not been subject to a sampling approach.  However, such estimates 
are not material to Ambac’s financial results and therefore are included in the below table.

Ambac  has  recorded  R&W  subrogation  recoveries  of  $1,834,387,  ($1,806,736  net  of  reinsurance)  and  $1,907,035,  ($1,878,740  net  of 
reinsurance)  at  December  31,  2017  and  2016,  respectively. The  balance  of  R&W  subrogation  recoveries  and  the  related  loss  reserves  at 
December 31, 2017 and 2016, are as follows:

| Ambac Financial Group, Inc.   111   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

At December 31, 2017

At December 31, 2016

Gross loss
reserves before
subrogation
recoveries (1)

$

$

1,366,483

1,351,640

$

$

Subrogation 
recoveries (2)(3)

Gross loss
reserves after
subrogation
recoveries

(1,834,387) $

(467,904)

(1,907,035) $

(555,395)

(1)  Amount represents gross loss reserves for policies that have established a representation and warranty subrogation recovery.  Includes unpaid RMBS 

claims, including accrued interest on Deferred Amounts, on policies allocated to the Segregated Account.

(2)  The amount of recorded subrogation recoveries related to each securitization is limited to ever-to-date paid and unpaid losses plus the present value of 
expected future cash flows for each policy. To the extent losses have been paid but not yet fully recovered, the recorded amount of R&W subrogation 
recoveries may exceed the sum of the unpaid claims and the present value of expected cash flows for a given policy. The net cash inflow for these policies 
is recorded as a “Subrogation recoverable” asset. For those transactions where the subrogation recovery is less than the sum of unpaid claims and the 
present value of expected cash flows, the net cash outflow for these policies is recorded as a “Loss and loss expense reserves” liability.

(3)  The sponsor’s repurchase obligation may differ depending on the terms of the particular transaction and the status of the specific loan, such as whether it 

is performing or has been liquidated or charged off.

Below is the rollforward of R&W subrogation for the affected periods:

Year ended December 31,

Discounted RMBS subrogation (gross of reinsurance) at beginning of year

Impact of sponsor actions (1)
All other changes (2)

Discounted RMBS subrogation (gross of reinsurance) at end of year

2017

2016

2015

$

$

1,907,035

$

2,829,575

$

2,523,540

—

(72,648)

(995,000)

72,460

1,834,387

$

1,907,035

$

—

306,035

2,829,575

(1)  Sponsor actions include loan repurchases, direct payments to Ambac and other contributions from sponsors.  In January 2016, Ambac Assurance settled 
its RMBS-related disputes and litigation against JP Morgan Chase & Co. and certain of its affiliates (collectively "JP Morgan"). Pursuant to the settlement, 
JP Morgan paid Ambac Assurance $995,000 in cash in return for releases of all of Ambac Assurance's claims against JP Morgan arising from certain 
RMBS transactions insured by Ambac Assurance. Ambac Assurance also agreed to withdraw its objections to JP Morgan's global RMBS settlement with 
RMBS trustees. 

(2)  All  other  changes  which  may  impact  R&W  subrogation  recoveries  include  changes  in  actual  or  projected  collateral  performance,  changes  in  the 
creditworthiness of a sponsor and/or the projected timing of recoveries. All other changes may also include estimates of potential sponsor settlements that 
may not have been subject to a sampling approach or have been executed but the settlement amounts have not yet been received.  Those that have not 
been subject to a sampling approach are not material to Ambac’s financial results and therefore are included in this table. 

Assumed Reinsurance: 

Assumed par outstanding was $219,100 and $243,700 at December 31, 2017 and 2016, respectively. 

Ceded Reinsurance: 

Ambac Assurance has reinsurance in place pursuant to surplus share treaty and facultative reinsurance agreements. The reinsurance of risk 
does not relieve Ambac Assurance of its original liability to its policyholders. In the event that any of Ambac Assurance’s reinsurers are unable 
to meet their obligations under reinsurance contracts, Ambac Assurance would, nonetheless, be liable to its policyholders for the full amount 
of its policy. 

Ambac Assurance’s reinsurance assets, including deferred ceded premiums and reinsurance recoverables on losses amounted to $93,192 at 
December 31, 2017. Credit exposure existed at December 31, 2017 with respect to reinsurance recoverables to the extent that any reinsurer 
may not be able to reimburse Ambac Assurance under the terms of these reinsurance arrangements. At December 31, 2017, there were ceded 
reinsurance balances payable of $37,876 offsetting this credit exposure. 

| Ambac Financial Group, Inc.   112   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

To minimize its credit exposure to losses from reinsurer insolvencies, Ambac Assurance (i) is entitled to receive collateral from its reinsurance 
counterparties in certain reinsurance contracts; and (ii) has certain cancellation rights that can be exercised by Ambac Assurance in the event 
of rating agency downgrades of a reinsurer (among other events and circumstances).  Ambac Assurance held letters of credit and collateral 
amounting to $115,561 from its reinsurers at December 31, 2017.  As of December 31, 2017, the aggregate amount of insured par ceded by 
Ambac Assurance to reinsurers under reinsurance agreements was $4,424,000 with the largest reinsurer accounting for $3,668,000 or 5.5%
of gross par outstanding at December 31, 2017. The following table represents the percentage ceded to reinsurers and reinsurance recoverable 
at December 31, 2017 and its rating levels obtained from each reinsurers website as of February 27, 2018: 

Reinsurers

Assured Guaranty Re Ltd

Assured Guaranty Corporation

Sompo Japan Nipponkoa Insurance, Inc.

Total

Moody’s
Rating

Percentage
Ceded Par

Net Unsecured
Reinsurance
Recoverable(1)

NR

A3

A1

82.9%

9.2

7.9

100%

$

$

—

—

—

—

(1)  Represents reinsurance recoverables on paid and unpaid losses and deferred ceded premiums, net of ceded premium payables due to reinsurers, letters of 

credit, and collateral posted for the benefit of Ambac Assurance. 

Insurance intangible asset:

The  insurance  intangible  amortization  expense  is  included  in  insurance  intangible  amortization  on  the  Consolidated  Statements  of Total 
Comprehensive Income (Loss).  For the years ended December 31, 2017, 2016 and 2015, the insurance intangible amortization expense was 
$150,854, $174,608 and $169,557, respectively.  As of December 31, 2017 and 2016, the gross carrying value of the insurance intangible asset 
was $1,581,156 and $1,534,419, respectively.  Accumulated amortization of the insurance intangible asset was $734,183 and $572,339, as of 
December 31, 2017 and 2016, respectively, resulting in a net insurance intangible asset of $846,973 and $962,080, respectively. 

The estimated future amortization expense for the net insurance intangible asset is as follows:

Future Insurance Intangible Amortization (1)

2018

2019

2020

2021

2022

Thereafter

$

76,638

$

69,082

$

63,892

$

58,207

$

53,908

$

525,246

(1)   The insurance intangible asset will be amortized using a level yield method based on par exposure of the related financial guarantee insurance or reinsurance 
contracts as described in Note 2. Basis of Presentation and Significant Accounting Policies.  As exposures are called or prepay, amortization of the insurance 
intangible asset will be recognized earlier and the timing will differ from the amounts provided in the table above.

8. 

INSURANCE REGULATORY RESTRICTIONS 

United States

Ambac Assurance and Everspan are domiciled in the State of Wisconsin and, as such, are subject to the insurance laws and regulations of the 
State of Wisconsin (the “Wisconsin Insurance Laws”) and are regulated by the OCI. In addition, Ambac Assurance and Everspan are subject to 
the insurance laws and regulations of the other jurisdictions in which they are licensed. 

Insurance laws and regulations applicable to financial guarantee insurers vary by jurisdiction. The laws and regulations generally require financial 
guarantors to maintain minimum standards of business conduct and solvency; to meet certain financial tests; and to file policy forms, premium 
rate schedules and certain reports with regulatory authorities, including information concerning capital structure, ownership, financial condition 
and enterprise risk. Regulated insurance companies are also required to file quarterly and annual statutory financial statements with the National 
Association of Insurance Commissioners (“NAIC”), and in each jurisdiction in which they are licensed. The level of supervisory authority that 
may be exercised by non-domiciliary insurance regulators varies by jurisdiction. Generally, however, non-domiciliary regulators are authorized 
to suspend or revoke the insurance license they issued and to impose restrictions on that license in the event that laws or regulations are breached 
by a regulated insurance company or in the event that continued or unrestricted licensing of the regulated insurance company constitutes a 
“hazardous condition” in the opinion of the regulator. 

As the principal, or domiciliary, regulator of Ambac Assurance and Everspan, OCI has primary regulatory authority, including with respect to 
the initiation and administration of rehabilitation or liquidation proceedings. Additionally, the accounts and operations of Ambac Assurance and 
Everspan are subject to periodic comprehensive examinations by the OCI. Wisconsin Insurance Laws require regulated insurance companies to 
maintain minimum standards of business conduct, maintain minimum surplus to policyholders, meet certain financial tests, and file certain 
reports,  including  information  concerning  their  capital  structure,  ownership,  financial  condition  and  enterprise  risk. Ambac Assurance  and 
Everspan are not subject to risk-based capital requirements, since they are financial guarantee insurers. Ambac Assurance and Everspan are in 
compliance with minimum surplus levels. Wisconsin Insurance Laws also require prior approval by OCI of certain transactions between Ambac 
Assurance or Everspan and their respective affiliates. 

| Ambac Financial Group, Inc.   113   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

In addition, pursuant to the terms of the Settlement Agreement and the Stipulation and Order, Ambac Assurance must seek prior approval by 
OCI of certain corporate actions. The Settlement Agreement and Stipulation and Order include covenants which restrict the operations of Ambac 
Assurance. The Settlement Agreement will remain in force until the surplus notes that were issued  pursuant to the Settlement Agreement have 
been redeemed, repurchased or repaid in full. The Stipulation and Order will remain in force for so long as OCI determines it to be necessary. 
Certain of the restrictions in the Settlement Agreement may be waived with the approval of the OCI and/or the requisite percentage of holders 
of surplus notes issued in connection with the Settlement Agreement. 

New York’s comprehensive financial guarantee insurance law defines the scope of permitted financial guarantee insurance and governs the 
conduct of business of all financial guarantors licensed to do business in New York, including Ambac Assurance and Everspan. The New York 
financial guarantee insurance law also establishes single risk and aggregate limits with respect to insured obligations insured by financial guarantee 
insurers. Such single risk limits are specific to the type of insured obligation (for example, municipal or asset-backed). Under the aggregate 
limits, policyholders’ surplus and contingency reserves must at least equal a percentage of aggregate net liability that is equal to the sum of 
various percentages of aggregate net liability for various categories of specified obligations. At December 31, 2017, Ambac Assurance is in 
compliance with applicable aggregate risk limits but not in compliance with applicable single risk limits. Through run-off of the portfolio, Ambac 
Assurance will continue to seek the reduction in its exposure for compliance with applicable single and aggregate risk limits, but may not be 
able to do so. Everspan is in compliance with all of such limits. 

Ambac Assurance’s statutory financial statements are prepared on the basis of accounting practices prescribed or permitted by Wisconsin Insurance 
law and OCI actions thereunder. A Wisconsin insurance company uses such statutory accounting practices prescribed or permitted by the State 
of Wisconsin for determining and reporting its financial condition and results of operations, including for determining its solvency under Wisconsin 
Insurance Law. The State of Wisconsin has adopted the applicable National Association of Insurance Commissioners (“NAIC”) accounting 
practices and procedures manual (“NAIC SAP”) as a component of prescribed practices by the State of Wisconsin.  Ambac Assurance’s statutory 
policyholder surplus was $699,614 at December 31, 2017, as compared to $976,477 as of December 31, 2016. Statutory policyholder surplus 
differs from stockholders’ equity determined under GAAP principally due to statutory accounting rules that treat loss reserves, investments, 
consolidation of subsidiaries and variable interest entities, premiums earned and surplus notes differently. 

The OCI has prescribed or permitted accounting practices for Ambac Assurance. As a result of the prescribed and permitted practices discussed 
below, Ambac Assurance’s statutory surplus at December 31, 2017 and 2016 was lower by $104,097 and higher by $17,290, respectively, than 
if Ambac Assurance had reported such amounts in accordance with NAIC SAP. 

Prescribed Accounting Practices:

•  OCI has prescribed an accounting practice that differs from NAIC SAP. Paragraph 8 of Statement of Statutory Accounting Principles No. 60 
“Financial Guaranty Insurance” (“SSAP 60”) allows for a deduction from loss reserves for the time value of money by application of a 
discount rate equal to the average rate of return on the admitted assets of the financial guaranty insurer as of the date of the computation of 
the reserve. The discount rate shall be adjusted at the end of each calendar year. Additionally, in accordance with paragraph 13.e of Statutory 
Accounting Principles No. 97 "Investments in Subsidiary, Controlled and Affiliated Entities" and paragraph 8 of Statutory Accounting 
Principles  No.  5R  “Liabilities,  Contingencies  and  Impairments  of Assets  -  Revised”, Ambac Assurance  records  probable  losses  on  its 
subsidiaries for which it guarantees their obligations. Ambac also discounts probable losses on guarantees of subsidiary obligations using 
a discount rate equal to the average rate of return on its admitted assets.  Ambac Assurance’s average rates of return on its admitted assets 
at December 31, 2017 and 2016 were 9.52% and 7.63%, respectively. OCI has directed Ambac Assurance to utilize a prescribed discount 
rate of 5.10% for the purpose of discounting both its loss reserves and its estimated impairment losses on subsidiary guarantees. 

•  OCI  has  prescribed  an  additional  accounting  practice  that  differs  from  NAIC  SAP.  Paragraph  4  of  Statement  of  Statutory Accounting 
Principles No. 41 “Surplus Notes” (“SSAP 41”) states that proceeds received by the issuer of surplus notes must be in the form of cash or 
other admitted assets having readily determinable values and liquidity satisfactory to the commissioner of the state of domicile. Under the 
statutory accounting principles as generally applied, surplus notes issued in conjunction with commutations or the settlement of claims 
would be valued at zero upon issuance pursuant to paragraph 4, SSAP 41. OCI has directed Ambac Assurance to record surplus notes issued 
in connection with commutations or the settlement of claims at full par value upon issuance as in these instances the surplus notes did not 
represent a contribution of capital, but rather a distribution of value from the common and preferred shareholders of Ambac Assurance. The 
surplus notes issued in connection with commutations or settlement of claims has a claim against surplus senior to the preferred and common 
shareholders. 

•  OCI had extended the preceding prescribed practice related to surplus notes to the evaluation of other-than-temporary impairments for 
Ambac Assurance guaranteed securities held in the investment portfolio.  Paragraph 35 of Statement of Statutory Accounting Principles 
No. 43R ”Loan-backed and Structured Securities” states that when an other-than-temporary impairment has occurred, the amount of the 
other-than-temporary impairment recognized as a realized loss shall equal the difference between the investment’s amortized cost basis and 
the present value of cash flows expected to be collected, discounted at the loan-backed or structured security’s effective interest rate. Under 
NAIC SAP, the present value of cash flows expected to be collected should include the fair value of surplus notes received from the Segregated 
Account, as required under the originally confirmed Segregated Account Rehabilitation Plan.  OCI had prescribed an accounting practice 
that differed from NAIC SAP and has directed Ambac Assurance to utilize par value rather than fair value of these surplus notes in this 
computation.  As a result of the amended Segregated Account Rehabilitation Plan becoming effective on June 12, 2014, this prescribed 

| Ambac Financial Group, Inc.   114   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

practice is no longer applicable.  Ambac Assurance received a new prescribed practice from OCI with regard to the carrying value of 
investments in Ambac Assurance insured securities with policies that were allocated to the Segregated Account.  The new prescribed practice, 
effective beginning June 11, 2014, exempts Ambac Assurance from evaluating such investments for other than temporary impairments and 
requires  all such investments be reported at amortized cost regardless of its NAIC risk designation. This accounting determination is intended 
to recognize  that Ambac Assurance continues to maintain statutory loss reserves without adjustment for the economic effects of its ownership 
of the insured investment securities, improve transparency to the users of the statutory financial statements and to minimize operational 
risks.   As a result of the exit of the Segregated Account from rehabilitation on February 12, 2018, this prescribed practice will no longer 
be applicable.  

•  OCI has prescribed an accounting practice related to the total liabilities and total surplus of the Segregated Account that are reported as 
discrete  components  of Ambac Assurance’s  liabilities  and  surplus  reported  in Ambac Assurance’s  statutory  basis  financial  statements. 
Pursuant to this prescribed practice, the results of the Segregated Account are not included in Ambac Assurance’s financial statements if 
Ambac Assurance’s surplus is (or would be) less than the Minimum Surplus Amount (i.e., $100,000. As long as the surplus as regards to 
policyholders is not less than the Minimum Surplus Amount, payments by Ambac Assurance to the Segregated Account under the Aggregate 
Excess of Loss Reinsurance Agreement between Ambac Assurance (as reinsurer) and the Segregated Account were not capped.  As a result 
of the exit of the Segregated Account from rehabilitation on February 12, 2018, this prescribed practice will no longer be applicable.

Permitted Accounting Practices:

•  Wisconsin accounting practices for changes to contingency reserves differ from NAIC SAP. Under NAIC SAP, contributions to and releases 
from the contingency reserve are recorded via a direct charge or credit to surplus. Under the Wisconsin Administrative Code, contributions 
to and releases from the contingency reserve are to be recorded through underwriting income. Ambac Assurance received permission from 
OCI to record contributions to and releases from the contingency reserve and the related tax and loss bond impact, in accordance with NAIC 
SAP. 

•  Ambac Assurance received permission from OCI to report investment holdings of Ambac Assurance insured securities as a separate invested 
asset  on  the  balance  sheet  rather  than  combined  with  other  bond  investments. This  permitted  practice  only  impacts  the  balance  sheet 
classification and has no impact on the valuation of the securities to which it applies or to statutory surplus. 

•  Effective upon the exit of the Segregated Account from Rehabilitation and the merger of the Segregated Account with Ambac Assurance, 
Ambac Assurance received permission from OCI to restate its unassigned funds (surplus) balance to $100,000 with an offsetting reduction 
to gross paid-in and contributed surplus such that total surplus remains unchanged. 

United Kingdom 

The Prudential Regulatory Authority (“PRA”) and Financial Conduct Authority (“FCA”) (and their predecessor regulator the Financial Services 
Authority (“FSA”)) are the dual statutory regulator responsible for regulating the financial services industry in the United Kingdom, with the 
purpose of maintaining confidence in the U.K. financial system, providing public understanding of the system, securing the proper degree of 
protection for consumers and helping to reduce financial crime. In addition, the regulatory regime in the United Kingdom must comply with 
certain EU legislation binding on all EU member states. 

These  regulators  have  exercised  significant  oversight  of Ambac  UK  since  2008,  after Ambac, Ambac Assurance  and Ambac  UK  began 
experiencing financial stress.  In 2009, Ambac UK’s license to write new business was curtailed by the FSA and the insurance license was limited 
to undertaking only run-off related activity. As such, Ambac UK is authorized to run-off its credit, suretyship and financial guarantee insurance 
portfolio in the United Kingdom, and to do the same through a branch in Milan, Italy, and a number of other European Union (“EU”) countries. 
EU legislation has allowed Ambac UK to conduct business in EU states other than the United Kingdom through a “passporting” arrangement, 
which eliminates the necessity of additional licensing or authorization in those other EU jurisdictions. 

The PRA requires that non-life insurance companies such as Ambac UK maintain a margin of solvency at all times in respect of the liabilities 
of the insurance company, the calculation of which depends on the type and amount of insurance business a company writes. These solvency 
requirements were amended on January 1, 2016 in order to implement the European Union's "Solvency II" directive on risk-based capital. 
Notwithstanding the foregoing, Ambac UK is deficient in terms of compliance with currently applicable regulatory capital requirements under 
Solvency II directive. The PRA and FCA are aware of the same, and dialogue between Ambac UK management and its regulators remains ongoing 
with respect to options for addressing the shortcoming, although such options remain few.

Dividend Restrictions, Including Contractual Restrictions 

Due to losses experienced by Ambac Assurance, Ambac Assurance has been unable to pay common dividends to Ambac since 2008 and will be 
unable to pay common dividends in 2018 without the prior consent of the OCI, which is unlikely.  Ambac Assurance’s ability to pay dividends 
is further restricted by the Settlement Agreement (as described below), by the terms of its AMPS (as described below) and by the Stipulation 
and Order. See Note 1. Background and Business Description for further information. 

Subject to the foregoing, pursuant to the Wisconsin Insurance Laws, Ambac Assurance and Everspan may declare dividends, subject to restrictions 
in their respective articles of incorporation, provided that, after giving effect to the distribution, such dividends would not violate certain statutory 

| Ambac Financial Group, Inc.   115   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

equity, solvency, income and asset tests. Board action authorizing a shareholder distribution by Ambac Assurance or Everspan (other than stock 
dividends)  must  be  reported  to  the  OCI  at  least  30  days  prior  to  payment,  unless  the  distribution  is  no  more  than  15%  larger  than  for  the 
corresponding period in the previous year.  In addition, Wisconsin Insurance Laws restrict the payment of extraordinary dividends, which is any 
distribution which, together with distributions in the prior 12 months, is greater than the lesser of (a) 10% of policyholders’ surplus as of the 
preceding December 31, and (b) the greater of (i) statutory net income (loss) for the calendar year preceding the date of the dividend, minus 
realized capital gains for that calendar year or (ii) the aggregate of statutory net income (loss) for three calendar years preceding the date of the 
dividend, minus realized capital gains for those calendar years and minus dividends paid or credited within the first two of the three preceding 
calendar years.  Extraordinary dividends must be reported to OCI at least 30 days prior to payment and are subject to disapproval by the OCI. 

UK law prohibits Ambac UK from declaring a dividend to its shareholders unless it has “profits available for distribution.” The determination 
of whether a company has profits available for distribution is based on its accumulated realized profits less its accumulated realized losses. While 
the UK insurance regulatory laws impose no statutory restrictions on a general insurer’s ability to declare a dividend, the PRA’s and FCA’s capital 
requirements in practice act as a restriction on the payment of dividends. Further, the FSA amended Ambac UK’s license in 2010 such that the 
PRA must specifically approve (“non-objection”) any transfer of value and/or assets from Ambac UK to Ambac Assurance or any other Ambac 
group company, other than in respect of certain disclosed contracts between the two parties (such as in respect of a management services agreement 
between Ambac Assurance and Ambac UK). Ambac UK is not expected to pay any dividends to Ambac Assurance for the foreseeable future.

Pursuant  to  the  Settlement Agreement Ambac Assurance  may  not  make  any  “Restricted  Payment”  (which  includes  dividends  from Ambac 
Assurance to Ambac) in excess of $5,000 in the aggregate per annum, other than Restricted Payments from Ambac Assurance to Ambac in an 
amount up to $7,500 per annum solely to pay operating expenses of Ambac. Concurrent with making any such Restricted Payment, a pro rata 
amount of Ambac Assurance's surplus notes would also need to be redeemed at par. 

Under the terms of Ambac Assurance’s Auction Market Preferred Shares (“AMPS”), dividends may not be paid on the common stock of Ambac 
Assurance unless all accrued and unpaid dividends on the AMPS for the then current dividend period have been paid, provided, that dividends 
on the common stock may be made at all times for the purpose of, and only in such amounts as are necessary for, enabling Ambac (i) to service 
its indebtedness for borrowed money as such payments become due or (ii) to pay its operating expenses. If dividends are paid on the common 
stock as provided in the prior sentence, dividends on the AMPS become cumulative until the date that all accumulated and unpaid dividends 
have been paid on the AMPS.

The Stipulation and Order requires OCI approval for the payment of any dividend or distribution on the common stock of Ambac Assurance.

9. 

FAIR VALUE MEASUREMENTS 

The Fair Value Measurement Topic of the ASC establishes a framework for measuring fair value and disclosures about fair value measurements.

Fair Value Hierarchy:

The Fair Value Measurement Topic of the ASC specifies a fair value hierarchy based on whether the inputs to valuation techniques used to 
measure  fair  value  are  observable  or  unobservable.  Observable  inputs  reflect  market  data  obtained  from  independent  sources,  while 
unobservable inputs reflect Company-based assumptions. The fair value hierarchy prioritizes model inputs into three broad levels as follows:

Level 1

Level 2

Quoted prices for identical instruments in active markets. Assets and liabilities classified as Level 1 include US Treasury and 
other foreign government obligations traded in highly liquid and transparent markets, exchange traded futures contracts, variable 
rate demand obligations and money market funds.

Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are 
not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active 
markets. Assets and  liabilities  classified  as  Level  2  generally  include  investments  in  fixed  income  securities  representing 
municipal, asset-backed and corporate obligations, certain interest rate swap contracts, and most long-term debt of variable 
interest entities consolidated under the Consolidation Topic of the ASC. 

Level 3 Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. This hierarchy 
requires the use of observable market data when available. Assets and liabilities classified as Level 3 include credit derivative 
contracts, certain uncollateralized interest rate swap contracts, equity interests in Ambac sponsored special purpose entities 
and certain investments in fixed income securities. Additionally, Level 3 assets and liabilities generally include fixed income 
securities, loan receivables, and certain long-term debt of variable interest entities consolidated under the Consolidation Topic 
of the ASC.

| Ambac Financial Group, Inc.   116   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The following table sets forth the carrying amount and fair value of Ambac’s financial assets and liabilities as of December 31, 2017 and 2016, 
including the level within the fair value hierarchy at which fair value measurements are categorized. As required by the Fair Value Measurement 
Topic of the ASC financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair 
value measurement.

Carrying
Amount

Total Fair
Value

Fair Value Measurements Categorized as:

Level 1

Level 2

Level 3

December 31, 2017:

Financial assets:

Fixed income securities:

Municipal obligations
Corporate obligations

Foreign obligations

U.S. government obligations

Residential mortgage-backed securities
Collateralized debt obligations

Other asset-backed securities

Fixed income securities, pledged as collateral:

U.S. government obligations

Short term investments
Other investments (1)
Cash and cash equivalents

Loans

Derivative assets:

Interest rate swaps—asset position

Other assets

Variable interest entity assets:

Fixed income securities:

Corporate obligations

Restricted cash

Loans

Derivative assets:

Currency swaps-asset position

Total financial assets

Financial liabilities:

$

$

779,834
860,075

26,543

85,408

2,251,333
51,037

597,942

99,719

557,270
431,630

623,703

10,358

73,199

5,979

779,834
860,075

26,543

85,408

2,251,333
51,037

597,942

99,719

557,270
413,977

623,703

10,284

73,199

5,979

2,914,145

2,914,145

978

978

11,529,384

11,529,384

$

— $
450

$

779,834
859,625

—
—

—

—

736,017
—

72,540

—

—
17,288

—

10,284

61,374

5,979

928

—

1,515,316
51,037

525,402

—

167,971
29,750

8,630

—

11,825

—

—

—

—

2,914,145

—

11,529,384

25,615

85,408

—
—

—

99,719

389,299
56,498

615,073

—

—

—

—

978

—

54,877
20,853,695

$

54,877
20,835,968

$

$

—
1,173,321

$

54,877
4,005,195

$

—
15,347,011

Long term debt, including accrued interest

1,428,680

1,369,499

Derivative liabilities:

Credit derivatives

Interest rate swaps—asset position
Interest rate swaps—liability position
Futures contracts

Liabilities for net financial guarantees written (2)
Variable interest entity liabilities:

Long-term debt

Derivative liabilities:

566

(627)
81,495
1,348

566

(627)
81,495
1,348

3,435,438

4,842,402

12,160,544

12,160,544

—

—

—
—
1,348

—

—

1,046,511

322,988

—

(627)
81,495
—

—

566

—
—
—

4,842,402

9,402,856

2,757,688

Interest rate swaps—liability position

Total financial liabilities

2,205,264
19,312,708

$

2,205,264
20,660,491

$

$

—
1,348

$

2,205,264
12,735,499

$

—
7,923,644

| Ambac Financial Group, Inc.   117   2017 FORM 10-K |

 
AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Carrying
Amount

Total Fair
Value

Fair Value Measurements Categorized as:

Level 1

Level 2

Level 3

December 31, 2016:

Financial assets:

Fixed income securities:

Municipal obligations

Corporate obligations

Foreign obligations

U.S. government obligations

U.S. agency obligations

$

374,368

$

374,368

$

— $

374,368

$

1,802,165

1,802,165

43,135

36,186

4,060

43,135

36,186

4,060

Residential mortgage-backed securities

2,351,595

2,351,595

Collateralized debt obligations

Other asset-backed securities

Fixed income securities, pledged as collateral:

U.S. government obligations

Short term investments
Other investments (1)

Cash and cash equivalents

Loans

Derivative assets:

Interest rate swaps—asset position

Interest rate swaps—liability position

Futures contracts

Other assets

Variable interest entity assets:

Fixed income securities:

Corporate obligations

Restricted cash

Derivative assets: 

Currency swaps-asset position

Loans

Total financial assets

Financial liabilities:

Obligations under investment agreements

Long term debt, including accrued interest

Derivative liabilities:

Credit derivatives

Interest rate swaps—asset position

Interest rate swaps—liability position

113,923

828,783

64,905

430,788

450,307

91,025

4,160

77,206

—

536

7,382

113,923

828,783

64,905

430,788

435,237

91,025

4,066

77,206

—

536

7,382

2,622,566

2,622,566

4,873

4,873

80,407

10,658,963

20,047,333

82,358

1,536,352

$

$

80,407

10,658,963

20,032,169

82,333

1,494,340

$

$

$

$

15,349

(61,839)

365,776

15,349

(61,839)

365,776

Liabilities for net financial guarantees written (2)

3,009,943

4,490,070

Variable interest entity liabilities:

Long-term debt

Derivative liabilities:

11,155,936

11,155,936

Interest rate swaps—liability position

2,078,601

2,078,601

Currency swaps—liability position

—

—

—

42,212

36,186

—

—

—

—

64,905

371,367

83,791

46,587

—

—

—

536

—

—

4,873

—

—

—

—

—

—

—

—

—

—

1,802,165

923

—

4,060

1,654,882

113,923

762,793

—

59,421

—

44,438

—

16,950

—

—

—

—

—

80,407

1,147,728

—

(61,839)

220,587

—

—

—

—

—

—

696,713

—

65,990

—

—

14,934

—

4,066

60,256

—

—

7,382

2,622,566

—

—

82,333

346,612

15,349

—

145,189

4,490,070

8,573,716

2,582,220

2,078,601

—

—

—

650,457

$

4,914,330

$

14,130,870

—

10,658,963

— $

— $

Total financial liabilities

$

18,182,476

$

19,620,566

$

— $

11,958,793

$

7,661,773

(1)  Excluded from the fair value measurement categories in the table above are investment funds of $310,441 and $336,513 as of December 31, 2017 and 

2016, respectively, which are measured using NAV per share as a practical expedient.

| Ambac Financial Group, Inc.   118   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

(2)  The carrying value of net financial guarantees written includes the following balance sheet items: Premium receivables; Reinsurance recoverable on paid 
and unpaid losses; Deferred ceded premium; Subrogation recoverable; Insurance intangible asset; Unearned premiums; Loss and loss expense reserves; 
Ceded premiums payable, premiums taxes payable and other deferred fees recorded in Other liabilities.

Determination of Fair Value:

When available, Ambac uses quoted active market prices specific to the financial instrument to determine fair value, and classifies such items 
within Level 1.  The determination of fair value for financial instruments categorized in Level 2 or 3 involves significant judgment due to the 
complexity of factors contributing to the valuation.   Third-party sources from which we obtain independent market quotes also use assumptions, 
judgments and estimates in determining financial instrument values and different third parties may use different methodologies or provide 
different values for financial instruments.  In addition, the use of internal valuation models may require assumptions about hypothetical or 
inactive markets. As a result of these factors, the actual trade value of a financial instrument in the market, or exit value of a financial instrument 
position by Ambac, may be significantly different from its recorded fair value. 

Ambac’s financial instruments carried at fair value are mainly comprised of investments in fixed income securities, equity interests in pooled 
investment funds, derivative instruments, variable interest entity assets and liabilities and equity interests in Ambac sponsored special purpose 
entities. Valuation of financial instruments is performed by Ambac’s finance group using methods approved by senior financial management 
with consultation from risk management and portfolio managers as appropriate. Preliminary valuation results are discussed with portfolio 
managers quarterly to assess consistency with market transactions and trends as applicable. Market transactions such as trades or negotiated 
settlements of similar positions, if any, are reviewed to validate fair value model results. However many of the financial instruments valued 
using significant unobservable inputs have very little or no observable market activity. Methods and significant inputs and assumptions used 
to determine fair values across portfolios are reviewed quarterly by senior financial management. Other valuation control procedures specific 
to particular portfolios are described further below. 

We reflect Ambac’s own creditworthiness in the fair value of financial liabilities by including a credit valuation adjustment (“CVA”) in the 
determination of fair value. A decline (increase) in Ambac’s creditworthiness as perceived by market participants will generally result in a 
higher (lower) CVA, thereby lowering (increasing) the fair value of Ambac’s financial liabilities as reported. 

Fixed Income Securities:

The fair values of fixed income investment securities are based primarily on market prices received from dealer quotes or alternative pricing 
sources with reasonable levels of price transparency. Because many fixed income securities do not trade on a daily basis, pricing sources apply 
available market information through processes such as matrix pricing to calculate fair value.  Such prices generally consider a variety of 
factors, including recent trades of the same and similar securities.  In those cases, the items are classified within Level 2. For those fixed 
income investments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. 
Key  inputs  to  the  internal  valuation  models  generally  include  maturity  date,  coupon  and  yield  curves  for  asset-type  and  credit  rating 
characteristics that closely match those characteristics of the specific investment securities being valued.  Items valued using valuation models 
are classified according to the lowest level input or value driver that is significant to the valuation. Thus, an item may be classified in Level 
3 even though there may be significant inputs that are readily observable.  Longer (shorter) expected maturities or higher (lower) yields used 
in the valuation model will, in isolation, result in decreases (increases) in fair value. Generally, lower credit ratings or longer expected maturities 
will be accompanied by higher yields used to value a security.  At December 31, 2017, approximately 6%, 79%, and 15% of the investment 
portfolio (excluding variable interest entity investments) was valued using dealer quotes, alternative pricing sources with reasonable levels of 
price transparency and internal valuation models, respectively. At December 31, 2016, approximately 5%, 82%, and 13% of the fixed income 
investment portfolio (excluding variable interest entity investments) was valued using dealer quotes, alternative pricing sources with reasonable 
levels of price transparency and internal valuation models, respectively.  Among the investments valued using internal valuation models are 
Ambac insured securities for which projected cash flows consist solely of Deferred Amounts and interest thereon.  These securities are internally 
valued based upon the valuation of Ambac Assurance's surplus notes and comprise 13% and 12% of the portfolio at December 31, 2017 and 
2016, respectively.

Ambac performs various review and validation procedures to quoted and modeled prices for fixed income securities, including price variance 
analyses, missing and static price reviews, overall valuation analyses by senior traders and finance managers and reviews associated with our 
ongoing impairment analysis. Unusual prices identified through these procedures will be evaluated further against additional market data (if 
available) and/or internally modeled prices, and the pricing source values will be challenged as necessary. Price challenges generally result 
in the use of the pricing source’s quote as originally provided or as revised by the source following their internal diligence process. A price 
challenge may result in a determination by either the pricing source or Ambac management that the pricing source cannot provide a reasonable 
value for a security or cannot adequately support a quote, in which case Ambac would resort to using either other quotes or internal models. 
Results of price challenges are reviewed by senior traders and finance managers. 

Information about the valuation inputs for fixed income securities classified as Level 3 is included below:

Residential mortgage-backed securities:  A portion of these securities are guaranteed under policies that were subject to the Segregated Account 
Rehabilitation Plan and had projected future cash flows consisting solely of Deferred Amounts under such policies including interest thereon.  
The fair value of such securities classified as Level 3 was $709,950 and $696,713 at December 31, 2017 and 2016, respectively.  Fair value 

| Ambac Financial Group, Inc.   119   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

was calculated based on the valuation of Ambac Assurance surplus notes which, under the terms of the Segregated Account Rehabilitation 
Plan effective in 2017, were to be redeemed in proportion with the payment of Deferred Amounts on or about the dates when such payments 
are made.   Following the consummation of the Rehabilitation Exit Transactions on February 12, 2018, under which surplus notes tendered 
did receive consideration equal that paid to settle Deferred Amounts, remaining surplus notes outstanding will no longer be treated pari passu 
with payments on insurance obligations.   Refer to Note 1. Background and Business Description for further details of the Rehabilitation Exit 
Transactions.   

The remaining portion of Level 3 residential mortgage-backed securities are an Ambac-insured re-REMIC containing distressed mortgage-
backed securities as collateral, the fair value of which was $26,067 at December 31, 2017.  There were $0 such securities classified as Level 
3 as of December 31, 2016.  Fair value was calculated using a discounted cash flow approach with expected future cash flows discounted 
using a yield consistent with the security type and rating.  Significant inputs for the valuation at December 31, 2017 were as follows:

December 31, 2017:
a.  Coupon rate:

2.05%

b.  Average Life:

0.65 years

c.  Yield:

10.00%

Other asset-backed securities:  These securities are a subordinated tranche of a resecuritization collateralized by Ambac-insured military 
housing bonds.  The fair value of such securities classified as Level 3 was $72,540 and $65,990 at December 31, 2017 and 2016, respectively.  
Fair value was calculated using a discounted cash flow approach with expected future cash flows discounted using a yield consistent with the 
security type and rating.  Significant inputs for the valuation at December 31, 2017 and 2016 include the following weighted averages:

December 31, 2017:

a.  Coupon rate:

5.97%

b.  Average Life:

17.02 years

c.  Yield:

12.00%

Other Investments:

December 31, 2016:

a.  Coupon rate:

5.93%

b.  Average Life:

17.74 years

c.  Yield:

13.50%

Other investments primarily relate to investments in pooled investment funds.  The fair value of pooled investment funds is determined using 
dealer quotes or alternative pricing sources when such investments have readily determinable fair values.  When fair value is not readily 
determinable, pooled investment funds are valued using the net asset value (“NAV”) per share as a practical expedient as permitted under the 
Fair Value Measurement Topic of the ASC.  Refer to Note 10. Investments for  additional information about such investments in pooled funds 
that are reported at fair value  using NAV as a practical expedient.

Other investments also includes Ambac's equity interest in a non-consolidated VIE, which is carried under the equity method.  Valuation of 
this equity interest is internally calculated using a discounted cash flow approach and is classified as Level 3.

Derivative Instruments:

Ambac’s derivative instruments primarily comprise interest rate and credit default swaps, and exchange traded futures contracts. Fair value 
is determined based upon market quotes from independent sources, when available. When independent quotes are not available, fair value is 
determined using valuation models. These valuation models require market-driven inputs, including contractual terms, credit spreads and 
ratings on underlying referenced obligations, yield curves and tax-exempt interest ratios. The valuation of certain interest rate as well as all 
credit derivative contracts also require the use of data inputs and assumptions that are determined by management and are not readily observable 
in the market. Under the Fair Value Measurement Topic of the ASC, Ambac is required to consider its own credit risk when measuring the 
fair value of derivatives and other liabilities. The fair value of credit derivative liabilities was reduced by $60 and $1,924 at December 31, 
2017 and 2016, respectively, as a result of incorporating an Ambac CVA into the valuation model for these contracts. Interest rate swaps may 
also require an adjustment to fair value to reflect Ambac’s credit risk.  During the three months ended June 30, 2017, interest rate swaps that 
had incorporated an Ambac CVA into the valuation were terminated.  As a result, derivative liabilities are no longer reduced as a result of 
Ambac CVA at December 31, 2017 compared to $44,973 at December 31, 2016.  Additional factors considered in estimating the amount of 
any Ambac CVA on such contracts include collateral posting provisions, right of set-off with the counterparty, the period of time remaining 
on the derivative and the pricing of recent terminations.

As described further below, certain valuation models require other inputs that are not readily observable in the market. The selection of a 
model to value a derivative depends on the contractual terms of, and specific risks inherent in the instrument as well as the availability of 
pricing information in the market. 

Derivatives that are less complex may be valued primarily by reference to interest rates and yield curves that are observable and regularly 
quoted, such as interest rate swaps, for which we generally utilize vendor-developed models.  These models provide the net present value of 

| Ambac Financial Group, Inc.   120   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

the derivatives based on contractual terms and observable market data. Downgrades of Ambac Assurance, as guarantor of the derivatives, have 
increased collateral requirements and triggered termination provisions in certain interest rate swaps. Termination activity since the initial rating 
downgrades of Ambac Assurance provided additional information about the replacement and/or exit value of certain derivatives, which has 
been incorporated into the fair value of these derivatives as appropriate. Generally, the need for counterparty (or Ambac) CVAs is mitigated 
by the existence of collateral posting agreements under which adequate collateral has been posted. Derivative contracts entered into with 
financial guarantee customers are not subject to collateral posting agreements. Counterparty credit risk related to such customer derivative 
assets is included in our fair value adjustments.  The valuation of such derivatives is generally classified as Level 3.

For derivatives that do not trade, or trade in less liquid markets such as credit derivatives, an internal model is generally used because such 
instruments tend to be unique, contain complex or heavily modified and negotiated terms, and pricing information is not readily available in 
the  market.  Derivative  fair  value  models  and  the  related  assumptions  are  continuously  re-evaluated  by  management  and  enhanced,  as 
appropriate, based on improvements in modeling techniques. Ambac has not made any significant changes to its modeling techniques or related 
model inputs for the periods presented.

Credit Derivatives (“CDS”):

Fair value of Ambac’s CDS is determined using internal valuation models and represents the hypothetical transfer cost of the contract calculated 
as the difference between the net present value of the projected fees receivable under the CDS and our estimate of the fees a financial guarantor 
of comparable credit quality would charge to provide the same protection at the balance sheet date. Financial guarantee contracts, including 
CDS, are typically priced to capture some portion of the spread that would be observed in the capital markets for the underlying (insured) 
obligation. Because of this relationship and in the absence of severe credit deterioration, changes in the fair value of our credit default swaps 
will generally be less than changes in the fair value of the underlying reference obligations.

Key variables used in the valuation of our credit derivatives include the balance of unpaid notional, expected term, fair values of the underlying 
reference obligations, reference obligation credit ratings and the CVA applied against Ambac Assurance liabilities by market participants. 
Notional balances, expected remaining term and reference obligation credit ratings are monitored and determined by Ambac’s Risk Management 
group. Fair values of the underlying reference obligations are obtained from broker quotes when available or are estimated internally using 
the same methodologies used to value Ambac’s fixed income securities in its investment portfolio.

Ambac reflects changes in reference obligation credit ratings within the fair value of its CDS contracts by changing the percentage of the 
obligation's market spread (over LIBOR) that would be captured as a CDS fee at the valuation date.  We adjust this percentage (“relative 
change ratio”) in our valuations based on internal rating changes such that the resulting fair value liability of the CDS contract, excluding the 
effect of Ambac's own credit risk, will increase up to the full amount of the unrealized loss on the reference obligation as the credit rating 
declines.  Ambac incorporates its own credit risk into the valuation of its CDS liabilities by applying a CVA to the calculations described 
above. The Ambac CVA represents the difference between the present value of the hypothetical fees discounted at LIBOR compared to discount 
rates that incorporate Ambac credit risk.

Information about the above described model inputs used to determine the fair value of credit derivatives, including the CVA as a percentage 
of the gross mark-to-market liability before considering Ambac credit risk (“CVA percentage”), as of December 31, 2017 and 2016 is summarized 
below:

December 31,

Number of CDS transactions

Notional outstanding

Weighted average reference obligation price

Weighted average life (WAL) in years

Weighted average credit rating

Weighted average relative change ratio

CVA percentage

Fair value of derivative liabilities

2017

2016

2

$

325,890

$

99.3

6.5

A

23.6%

9.64%

8

737,380

93.5

5.2

A-

31.6%

11.14%

$

566

$

15,349

The maximum potential amount of future payments under Ambac’s credit derivative contracts is generally the notional outstanding amount 
included in the above table plus future interest payments by the derivative reference obligations. Since Ambac’s credit derivatives typically 
reference obligations of or assets held by special purpose entities that meet the definition of a VIE, the amount of maximum potential future 
payments for credit derivatives is included in the table in Note 3. Special Purpose Entities, Including Variable Interest Entities.

Changes in fair value are recorded in “Net change in fair value of credit derivatives” on the Consolidated Statements of Total Comprehensive 
Income  (Loss). Although  CDS  contracts  are  accounted  for  at  fair  value,  they  are  surveilled  similar  to  non-derivative  financial guarantee 
contracts. As with financial guarantee insurance policies, Ambac’s Risk Management group tracks credit migration of CDS contracts’ reference 
obligations from period to period.  Credits are assigned risk classifications by the Risk Management group. As of December 31, 2017, there 

| Ambac Financial Group, Inc.   121   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

are no CDS contracts on Ambac’s adversely classified credit listing.  As of December 31, 2016, there were two CDS contracts on Ambac’s 
adversely classified credit listing, with a net derivative liability fair value of $6,123 and total notional outstanding of $67,783.

Significant unobservable inputs for credit derivatives include WAL, internal credit rating, relative change ratio and CVA percentage. A longer 
(shorter) WAL, lower (higher) reference obligation credit rating, higher (lower) relative change ratio or lower (higher) CVA, in isolation, 
would result in an increase (decrease) in the fair value liability measurement. A change in an internal credit rating of a reference obligation in 
our model will generally result in a directionally opposite change in the relative change ratio. Also, a shorter (longer) WAL will generally 
correspond with a lower (higher) CVA percentage.

Financial Guarantees:

Fair value of net financial guarantees written represents our estimate of the cost to Ambac to completely transfer its insurance obligation to 
another market participant of comparable credit worthiness. In theory, this amount should be the same amount that another market participant 
of comparable credit worthiness would hypothetically charge in the market place, on a present value basis, to provide the same protection as 
of the balance sheet date. This fair value estimate of financial guarantees is presented on a net basis and includes direct and assumed contracts 
written, net of ceded reinsurance contracts.

The fair value estimate of financial guarantees is computed by utilizing cash flows calculated at the policy level. For direct and assumed 
contracts, net cash flows for each policy includes future: (i) installment premium receipts, (ii) gross claim payments, (iii) subrogation receipts, 
and (iv) unpaid claims on claims presented and not yet paid for policies allocated to the Segregated Account, including Deferred Amounts 
and interest thereon.  The timing of future claim payments of the Segregated Account was at the sole discretion of the Rehabilitator until the 
Segregated Account rehabilitation was concluded on February 12, 2018.  For ceded reinsurance contracts, net cash flows for each policy 
includes future: (i) installment ceded premium payments, (ii) ceding commission receipts, (iii) ceded claim receipts, and (iv) ceded subrogation 
payments. For each assumed,or ceded reinsurance contract, the respective undiscounted cash flow components are aggregated to determine 
if we are in a net asset or net liability position. U.S. GAAP requires that the nonperformance risk of a financial liability be included in the 
estimation of fair value, which includes considering Ambac Assurance’s own credit risk. Accordingly, for each contract in a net liability 
position, we estimate the fair value using internally developed discount rates and market pricing that incorporate Ambac’s own credit risk and 
subsequently apply a profit margin. This profit margin represents what another market participant would require to assume the financial 
guarantee contracts.  A profit margin was developed based on discussions with the third-party institutions with valuation expertise, discussions 
with industry participants and yields on Ambac Assurance surplus notes.  The discount rates used for contracts in a net liability position are 
derived from the rates implicit in the fair value of surplus notes and guaranteed securities with future cash flows that are highly dependent 
upon Ambac financial guarantee payments.  For each contract in a net asset position, we estimate the fair value using a discount rate that is 
commensurate with a hypothetical buyer’s cost of capital.

This methodology is based on management’s expectations of how a market participant would estimate net cash flows. We are aware of a 
number of factors that may cause such fair or exit value to differ, perhaps materially. For example, (i) since no financial guarantor with Ambac 
Assurance’s credit quality is writing or otherwise obtaining financial guarantee business (e.g. reinsurance or novation of policies from other 
insurers) we do not have access to observable pricing data points and (ii) certain segments of Ambac's financial guarantees were allocated to 
the Segregated Account and timing of the payments of such liabilities were at the sole discretion of the Rehabilitator.

Long-term Debt:

Long-term debt includes surplus notes issued by Ambac Assurance, surplus notes issued by the Segregated Account of Ambac Assurance, 
which became obligations of Ambac Assurance when the Rehabilitation Exit Transactions were effectuated on February 12, 2018, and notes 
outstanding to third parties arising from Ambac Assurance's secured borrowing transaction.  The fair values of Ambac Assurance surplus notes 
and the secured borrowing notes are based on market prices received from dealer quotes or alternative pricing sources with reasonable levels 
of price transparency.  The fair value of Segregated Account surplus notes were classified as Level 3 and are internally estimated considering 
market transactions when available and internally developed discounted cash flow models.  Internal valuation estimates of Segregated Account 
surplus notes considered differences in contractual accrued interest and seniority of payment relative to Ambac Assurance surplus notes.

Other Financial Assets and Liabilities:

The fair values of Ambac’s equity interest in Ambac sponsored special purpose entities (included in Other assets), Loans, and Obligations 
under investment agreements are estimated based upon internal valuation models that discount expected cash flows using discount rates 
consistent with the credit quality of the obligor after considering collateralization.

Variable Interest Entity Assets and Liabilities:

The financial assets and liabilities of VIEs consolidated under the Consolidation Topic of the ASC consist primarily of fixed income securities, 
loans, derivative and debt instruments and are generally carried at fair value. These consolidated VIEs are securitization entities which have 
liabilities and/or assets guaranteed by Ambac Assurance. The fair values of VIE debt instruments are determined using the same methodologies 
used to value Ambac’s fixed income securities in its investment portfolio as described above. VIE debt fair value is based on market prices 
received from dealer quotes or alternative pricing sources with reasonable levels of price transparency. Such quotes are considered Level 2 
and generally consider a variety of factors, including recent trades of the same and similar securities. For those VIE debt instruments where 

| Ambac Financial Group, Inc.   122   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

quotes were not available, the debt instrument fair values are considered Level 3 and are based on internal discounted cash flow models. 
Comparable to the sensitivities of investments in fixed income securities described above, longer (shorter) expected maturities or higher (lower) 
yields used in the valuation model will, in isolation, result in decreases (increases) in fair value liability measurement for VIE debt. VIE debt 
instruments considered Level 3 include fixed rate, floating rate and zero coupon notes secured by various asset types, primarily European 
ABS. Information about the valuation inputs for the various VIE debt categories classified as Level 3 is as follows:

European ABS transactions: The fair value of such obligations classified as Level 3 was $2,757,688 and $2,551,278 at December 31, 2017 
and 2016, respectively. Fair values were calculated by using a discounted cash flow approach. The discount rates used were based on the rates 
implied from the third party quoted values for comparable notes from the same securitization entity. Significant inputs for the valuation at 
December 31, 2017 and 2016 include the following weighted averages:

December 31, 2017

a.  Coupon rate: 0.40%

b.  Maturity:

15.28 years

c.  Yield:

4.82%

December 31, 2016

a.  Coupon rate: 0.46%

b.  Maturity:

16.16 years

c.  Yield:

4.95%

US Commercial ABS transaction: The fair value of such obligations classified as Level 3 was $0 and $30,942 at December 31, 2017 and 2016, 
respectively. Fair values were calculated as the sum of the present value of expected future cash flows from the underlying VIE assets plus 
the present value of the related Ambac financial guarantee cash flows.  The discount rates applied to cash flows sourced from VIE assets were 
based on interest rates for similar obligations. The fair value of financial guarantee cash flows include internal estimates of future loss payments 
by Ambac, when applicable, discounted at a rate that incorporates Ambac’s own credit risk. As a result of a negotiated settlement to refinance 
this Ambac-insured debt, the final paydown of the bond occurred in October 2017.

Significant inputs for the valuation at December 31, 2016, include the following weighted averages:

December 31, 2016

a.  Coupon rate: 5.88%

b.  Maturity:

20.85 years

c.  Yield:

5.86%

VIE derivative asset and liability fair values are determined using valuation models. When specific derivative contractual terms are available 
and may be valued primarily by reference to interest rates, foreign exchange rates and yield curves that are observable and regularly quoted, 
the derivatives are valued using vendor-developed models. Other derivatives within the VIEs that include significant unobservable valuation 
inputs are valued using internally developed models. VIE derivative fair value balances at December 31, 2017 and 2016 were developed using 
vendor-developed models and do not use significant unobservable inputs.

The fair value of VIE assets are obtained from market quotes when available. Typically VIE asset fair values are not readily available from 
market quotes and are estimated internally. The consolidated VIEs are securitization entities in which net cash flows from assets and derivatives 
(after adjusting for financial guarantor cash flows and other expenses) will be paid out to note holders or equity interests. Our valuation of 
VIE assets (fixed income securities or loans), therefore, are derived from the fair value of notes and derivatives, as described above, adjusted 
for the fair value of cash flows from Ambac’s financial guarantee. The fair value of financial guarantee cash flows include: (i) estimated future 
premiums discounted at a rate consistent with that implicit in the fair value of the VIE’s liabilities and (ii) internal estimates of future loss 
payments by Ambac discounted at a rate that includes Ambac’s own credit risk. Estimated future premium payments to be paid by the VIEs 
were discounted at a weighted average rate of 3.1% and 3.6% at December 31, 2017 and 2016, respectively. The value of future loss payments 
to be paid by Ambac to the VIEs was adjusted to include an Ambac CVA appropriate for the term of expected Ambac claim payments.

Additional Fair Value Information for Financial Assets and Liabilities Accounted for at Fair Value:

The following tables present the changes in the Level 3 fair value category for the periods presented in 2017, 2016 and 2015. Ambac classifies 
financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation 
model. In addition to these unobservable inputs, the valuation models for Level 3 financial instruments typically also rely on a number of 
inputs that are readily observable either directly or indirectly. Thus, the gains and losses presented below include changes in the fair value 
related to both observable and unobservable inputs.

| Ambac Financial Group, Inc.   123   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Level-3 Financial Assets and Liabilities Accounted for at Fair Value

Year Ended December 31, 2017

Investments

Other
Assets

Derivatives

Investments

Loans

Long-term
Debt

Total

Balance, beginning of period

$

762,703

$

7,382

$

(100,282) $ 2,622,566

$ 10,658,963

$ (2,582,220) $ 11,369,112

VIE Assets and Liabilities

Total gains/(losses) realized and 

unrealized:

Included in earnings

65,195

(1,403)

62,847

70,928

550,021

35,009

782,597

Included in other comprehensive 

income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Deconsolidation of VIEs

Balance, end of period

The amount of total gains/(losses) included 
in earnings attributable to the change in 
unrealized  gains  or  losses  relating  to 
assets  and  liabilities  still  held  at  the 
reporting date

6,392

35,781

(79,319)

(29,963)

47,768

—

—

—

—

—

—

—

—

—

—

—

—

253,429

1,004,284

(254,093)

1,010,012

—

—

—

—

—

—

35,781

(79,319)

98,243

(32,778)

(683,884)

43,616

(604,766)

—

—

—

—

—

—

—

—

—

—

—

—

47,768

—

—

$

808,557

$

5,979

$

60,808

$ 2,914,145

$ 11,529,384

$ (2,757,688) $ 12,561,185

$

— $

(1,403) $

8,913

$

70,928

$

547,004

$

36,851

$

662,293

Level-3 Financial Assets and Liabilities Accounted for at Fair Value

Year Ended December 31, 2016

Investments

Other
Assets

Derivatives

Investments

Loans

Long-term
Debt

Total

Balance, beginning of period

$

488,884

$

8,696

$

(99,192) $ 2,588,556

$ 11,690,324

$ (3,180,170) $ 11,497,098

VIE Assets and Liabilities

Total gains/(losses) realized and 

unrealized:

Included in earnings

54,600

(1,314)

(15,374)

508,873

1,166,898

(842,748)

870,935

Included in other comprehensive 

income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Deconsolidations of VIEs

Balance, end of period

The amount of total gains/(losses) included 
in earnings attributable to the change in 
unrealized  gains  or  losses  relating  to 
assets  and  liabilities  still  held  at  the 
reporting date

40,518

99,018

—

(28,682)

108,365

—

—

—

—

—

—

—

—

—

—

—

—

14,284

—

—

—

(474,863)

(1,944,821)

486,218

(1,892,948)

—

—

—

—

—

—

—

—

—

—

(253,438)

216,582

—

—

—

—

737,898

—

99,018

—

(51,254)

108,365

737,898

—

$

762,703

$

7,382

$

(100,282) $ 2,622,566

$ 10,658,963

$ (2,582,220) $ 11,369,112

$

— $

(1,314) $

(16,351) $

508,873

$ 1,166,898

$

(842,748) $

815,358  

| Ambac Financial Group, Inc.   124   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Level-3 Financial Assets and Liabilities Accounted for at Fair Value

Year Ended December 31, 2015

Investments

Other
Assets

Derivatives

Investments

Loans

Long-term
Debt

Total

Balance, beginning of period

$

198,201

$

12,036

$

(215,346) $ 2,743,050

$ 12,371,177

$ (1,263,664) $ 13,845,454

VIE Assets and Liabilities

Total gains/(losses) realized and 

unrealized:

Included in earnings

30,083

(1,635)

16,571

(7,263)

569,617

(1,152,681)

(545,308)

Included in other comprehensive 

income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Deconsolidation of VIEs

Balance, end of period

The amount of total gains/(losses) included 
in earnings attributable to the change in 
unrealized  gains  or  losses  relating  to 
assets  and  liabilities  still  held  at  the 
reporting date

(73,559)

359,193

—

—

—

—

(25,034)

(1,705)

—

—

—

—

—

—

—

—

—

11,365

88,218

—

—

(147,231)

(612,941)

93,812

(739,919)

—

—

—

—

—

—

—

—

(312,406)

—

—

(325,123)

—

—

(17,085)

(840,552)

—

—

359,193

—

(344,865)

(752,334)

—

(325,123)

$

488,884

$

8,696

$

(99,192) $ 2,588,556

$ 11,690,324

$ (3,180,170) $ 11,497,098

$

— $

(1,635) $

(25,980) $

(7,263) $

589,634

$ (1,161,991) $

(607,235)

The tables below provide roll-forward information by class of investments and derivatives measured using significant unobservable inputs.

Level-3 Investments by Class

Year Ended December 31,

Balance, beginning of period

Total gains/(losses) realized and unrealized:

Included in earnings

Included in other comprehensive income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Balance, end of period

The  amount  of  total  gains/(losses)  included  in  earnings 
attributable to the change in unrealized gains or losses 
relating to assets and liabilities still held at the reporting 
date

Other asset
backed
securities

2017

Non-
Agency 
RMBS

Total
investments

Other asset
backed
securities

2016

Non-
Agency
RMBS

Total
investments

$

65,990

$

696,713

$

762,703

$

— $

488,884

$

488,884

1,433

6,130

—

—

(1,013)

—

—

63,762

262

35,781

(79,319)

(28,950)

47,768

—

65,195

6,392

35,781

(79,319)

(29,963)

47,768

—

1,908

(5,597)

—

—

(1,028)

70,707

—

52,692

46,115

99,018

—

(27,654)

37,658

—

54,600

40,518

99,018

—

(28,682)

108,365

—

72,540

$

736,017

$

808,557

$

65,990

$

696,713

$

762,703

— $

— $

— $

— $

— $

—

$

$

| Ambac Financial Group, Inc.   125   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Level-3 Investments by Class

Year Ended December 31, 2015

Balance, beginning of period

Total gains/(losses) realized and unrealized:

Included in earnings

Included in other comprehensive income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Balance, end of period

The  amount  of  total  gains/(losses)  included  in  earnings  attributable  to  the  change  in 
unrealized gains or losses relating to assets and liabilities still held at the reporting date

2015

Other asset
backed
securities

Corporate
obligations

Non-
Agency
RMBS

Total
investments

$

— $

3,808

$

194,393

$

198,201

—

—

—

—

—

—

—

(19)

(286)

—

—

30,102

(73,273)

359,193

—

30,083

(73,559)

359,193

—

(3,503)

(21,531)

(25,034)

—

—

—

—

—

—

$

$

— $

— $

488,884

$

488,884

— $

— $

— $

—

Level-3 Derivatives by Class

Year Ended December 31,

Balance, beginning of period

Total gains/(losses) realized and unrealized:

2017

2016

Interest
rate
swaps

Credit
derivatives

Total
derivatives

Interest
rate
swaps

Credit
derivatives

Total
derivatives

$

(84,933) $

(15,349) $

(100,282) $

(64,649) $

(34,543) $

(99,192)

Included in earnings

46,475

16,372

62,847

(35,480)

20,106

(15,374)

Included in other comprehensive income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Balance, end of period

The  amount  of  total  gains/(losses)  included  in  earnings 
attributable  to  the  change  in  unrealized  gains  or  losses 
relating to assets and liabilities still held at the reporting 
date

$

$

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

99,832

(1,589)

98,243

15,196

(912)

14,284

—

—

—

—

—

—

—

—

—

—

—

—

61,374

$

(566) $

60,808

$

(84,933) $

(15,349) $

(100,282)

6,716

$

2,197

$

8,913

$

(35,480) $

19,129

$

(16,351)

| Ambac Financial Group, Inc.   126   2017 FORM 10-K |

 
AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Level-3 Derivatives by Class

Year Ended December 31,

Balance, beginning of period

Total gains/(losses) realized and unrealized:

Included in earnings

Included in other comprehensive income

Purchases

Sales

Settlements

Transfers into Level 3

Transfers out of Level 3

Balance, end of period

The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or 

losses relating to assets and liabilities still held at the reporting date

2015

Interest
rate
swaps

Credit
derivatives

Total
derivatives

$

(141,887) $

(73,459) $

(215,346)

(25,130)

41,701

16,571

—

—

—

14,150

88,218

—

—

—

—

(2,785)

—

—

—

—

—

11,365

88,218

—

$

$

(64,649) $

(34,543) $

(99,192)

(25,130) $

(850) $

(25,980)

Invested assets and VIE long-term debt are transferred into Level 3 when internal valuation models that include significant unobservable inputs 
are used to estimate fair value.  All such securities that have internally modeled fair values have been classified as Level 3.  Non-agency RMBS 
securities transferred into Level 3 in 2017 consist of an Ambac-insured re-REMIC collateralized by distressed mortgage-backed securities 
and certain Ambac-insured RMBS for which projected cash flows consist solely of Deferred Amounts and interest thereon.  Non-agency 
RMBS transferred into Level 3 in 2016 consist of certain investments in Ambac-wrapped RMBS securities for which projected cash flows 
consist solely of Deferred Amounts and interest thereon.  Other asset-backed securities transferred into Level 3 in 2016 consist of a subordinated 
tranche  of  a  resecuritization  collateralized  by Ambac-insured  military  housing  bonds.    These  invested  assets  were  internally  valued  as 
management could not corroborate the reasonableness of third party quotes.  

Derivative instruments are transferred into Level 3 when the use of unobservable inputs becomes significant to the overall valuation.   Derivative 
instruments transferred into Level 3 in 2015 consisted of certain interest rate swap assets with counterparty credit adjustments.   

There were no transfers between Level 1 and Level 2 for the periods presented. All transfers between fair value hierarchy Levels 1, 2, and 3 
are recognized at the beginning of each accounting period.

Gains and losses (realized and unrealized) relating to Level 3 assets and liabilities included in earnings for the affected periods are reported 
as follows:

Realized
gains or
(losses)
and
other
settlements
on credit
derivative
contracts

Unrealized
gains or
(losses) on
credit
derivative
contracts

Net
investment
income

Interest
rate
swaps

Income
(loss) on
variable
interest
entities

Other
income
or (loss)

Year Ended December 31, 2017

Total gains or losses included in earnings for the period

65,195

1,589

14,783

46,475

655,956

(1,403)

Changes in unrealized gains or losses relating to the
assets and liabilities still held at the reporting date

—

—

2,197

6,716

654,783

(1,403)

Year Ended December 31, 2016

Total gains or losses included in earnings for the period

$

54,600

$

912

$

19,194

$

(35,480) $

833,023

$

(1,314)

Changes in unrealized gains or losses relating to the
assets and liabilities still held at the reporting date

—

—

19,129

(35,480)

833,023

(1,314)

Year Ended December 31, 2015

Total gains or losses included in earnings for the period

$

30,083

$

2,785

$

38,916

$

(25,130) $

(590,327) $

(1,635)

Changes in unrealized gains or losses relating to the
assets and liabilities still held at the reporting date

—

—

(850)

(25,130)

(579,620)

(1,635)

| Ambac Financial Group, Inc.   127   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

 10. 

INVESTMENTS 

Ambac’s non-VIE invested assets are primarily comprised of fixed income securities classified as available-for-sale and equity interests in 
pooled investment funds. Such equity interests in the form of common stock or in-substance common stock are classified as trading securities 
and  are  reported  within  Other  investments  on  the  Consolidated  Balance  Sheets.    Other  investments  also  include Ambac's  interests  in  an 
unconsolidated trust created in connection with its sale of Segregated Account junior surplus notes on August 28, 2014.

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at December 31, 2017 and 2016 
were as follows:

Amortized
cost

Gross
unrealized
gains

Gross
unrealized
losses

Estimated
fair value

Non-Credit  
Other-
than-
temporary
Impairments (1)

December 31, 2017

Fixed income securities:

Municipal obligations

Corporate obligations

Foreign obligations

U.S. government obligations

Residential mortgage-backed securities

Collateralized debt obligations

Other asset-backed securities

Short-term

Fixed income securities pledged as collateral:

U.S. government obligations

Total collateralized investments

$

845,778

$

3,456

$

69,400

$

779,834

$

858,774

26,245

86,900

2,214,512

50,754

531,660

4,614,623

557,476

5,172,099

99,719

99,719

6,772

409

261

67,303

283

66,899

145,383

3

145,386

—

—

—

—

—

—

5,471

111

1,753

860,075

26,543

85,408

30,482

2,251,333

23,832

—

617

107,834

209

108,043

—

—

51,037

597,942

4,652,172

557,270

5,209,442

99,719

99,719

—

—

23,832

—

23,832

—

—

Total available-for-sale investments

$

5,271,818

$

145,386

$

108,043

$

5,309,161

$

23,832

December 31, 2016

Fixed income securities:

Municipal obligations

Corporate obligations

Foreign obligations

U.S. government obligations

U.S. agency obligations

Residential mortgage-backed securities

Collateralized debt obligations

Other asset-backed securities

Short-term

Fixed income securities pledged as collateral:

U.S. government obligations

Total collateralized investments

$

376,064

$

5,509

$

7,205

$

374,368

$

1,803,136

41,932

33,732

4,063

2,284,425

113,650

778,383

5,435,385

430,827

5,866,212

64,833

64,833

19,589

1,303

2,551

—

110,955

493

58,028

198,428

5

198,433

72

72

20,560

1,802,165

100

97

3

43,785

220

7,628

79,598

44

79,642

—

—

43,135

36,186

4,060

2,351,595

113,923

828,783

5,554,215

430,788

5,985,003

64,905

64,905

—

—

—

—

—

35,232

—

—

35,232

—

35,232

—

—

Total available-for-sale investments

$

5,931,045

$

198,505

$

79,642

$

6,049,908

$

35,232

(1)  Represents the amount of non-credit other-than-temporary impairment losses remaining in accumulated other comprehensive income on securities that 

also had a credit impairment. These losses are included in gross unrealized losses as of December 31, 2017 and 2016.

| Ambac Financial Group, Inc.   128   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at December 31, 2017, by contractual 
maturity, were as follows:

Due in one year or less

Due after one year through five years

Due after five years through ten years

Due after ten years

Residential mortgage-backed securities

Collateralized debt obligations

Other asset-backed securities

Total

Amortized
Cost

Estimated
Fair Value

$

714,761

$

556,370

376,420

827,341

2,474,892

2,214,512

50,754

531,660

714,507

556,387

376,686

761,269

2,408,849

2,251,333

51,037

597,942

$

5,271,818

$

5,309,161

Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or 
without call or prepayment penalties.

Unrealized Losses on Fixed Income Securities:

The following table shows gross unrealized losses and fair values of Ambac’s available-for-sale investments, aggregated by investment category 
and length of time that the individual securities have been in a continuous unrealized loss position, at December 31, 2017 and 2016:

Less Than 12 Months

12 Months or More

Total

Fair Value

Gross
Unrealized
Loss

Fair Value

Gross
Unrealized
Loss

Fair Value

Gross
Unrealized
Loss

December 31, 2017

Fixed income securities:

Municipal obligations

Corporate obligations

Foreign obligations

U.S. government obligations

Residential mortgage-backed

securities

Other asset-backed securities

Short-term

Total temporarily impaired 

securities

$

667,335

$

68,578

$

32,525

$

822

$

699,860

$

69,400

292,028

8,122

74,188

668,524

26,655

1,736,852

251,926

3,377

81

1,653

12,524

58

86,271

209

87,272

1,700

5,525

418,617

88,023

633,662

—

2,094

30

100

17,958

559

21,563

—

379,300

9,822

79,713

1,087,141

114,678

2,370,514

251,926

5,471

111

1,753

30,482

617

107,834

209

$

1,988,778

$

86,480

$

633,662

$

21,563

$

2,622,440

$

108,043

| Ambac Financial Group, Inc.   129   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

December 31, 2016

Fixed income securities:

Municipal obligations

Corporate obligations

Foreign obligations

U.S. government obligations

U.S. agency obligations

Residential mortgage-backed

securities

Collateralized debt obligations

Other asset-backed securities

Short-term

Total temporarily impaired 

securities

Less Than 12 Months

12 Months or More

Total

Fair Value

Gross
Unrealized
Loss

Fair Value

Gross
Unrealized
Loss

Fair Value

Gross
Unrealized
Loss

$

98,147

$

2,045

$

122,928

$

5,160

$

221,075

$

963,513

20,232

5,063

6,037

4,060

226,889

6,986

115,622

1,426,317

65,176

100

93

3

7,201

23

203

29,900

44

6,492

—

5,045

—

550,807

25,780

77,712

788,764

—

328

—

4

—

36,584

197

7,425

49,698

—

970,005

5,063

11,082

4,060

777,696

32,766

193,334

2,215,081

65,176

7,205

20,560

100

97

3

43,785

220

7,628

79,598

44

$

1,491,493

$

29,944

$

788,764

$

49,698

$

2,280,257

$

79,642

Management has determined that the unrealized losses reflected in the tables above are temporary in nature as of December 31, 2017 and 2016
based upon (i) no unexpected principal and interest payment defaults on these securities; (ii) analysis of the creditworthiness of the issuer and 
financial guarantor, as applicable, and analysis of projected defaults on the underlying collateral; (iii) management has no intent to sell these 
investments in debt securities; and (iv) it is not more likely than not that Ambac will be required to sell these debt securities before the anticipated 
recovery of its amortized cost basis. The assessment under (iv) is based on a comparison of future available liquidity from the investment 
portfolio against the projected net cash outflow from operating activities and debt service. For purposes of this assessment, available liquidity 
from the investment portfolio is comprised of the fair value of securities for which management has asserted its intent to sell, the fair value 
of other securities that are available for sale and in an unrealized gain position, trading securities plus the scheduled maturities and interest 
payments from the remaining securities in the portfolio. To the extent that securities that management intends to sell are in an unrealized loss 
position, they would have already been considered other-than-temporarily impaired with the amortized cost written down to fair value.  Because 
the above-described assessment indicates that future available liquidity exceeds projected net cash outflow, it is not more likely than not that 
we would be required to sell securities in an unrealized loss position before the recovery of their amortized cost basis. In the liquidity assessment 
described above, principal payments on securities pledged as collateral are not considered to be available for other liquidity needs until the 
collateralized positions are projected to be settled. Projected interest receipts on securities pledged as collateral generally belong to Ambac 
and are considered to be sources of available liquidity from the investment portfolio. 

As of December 31, 2017, for securities that have indications of possible other-than-temporary impairment but which management does not 
intend to sell and will not more likely than not be required to sell, management compared the present value of cash flows expected to be 
collected to the amortized cost basis of the securities to assess whether the amortized cost will be recovered. Cash flows were discounted at 
the effective interest rate implicit in the security at the date of acquisition (or Fresh Start Reporting Date of April 30, 2013 for securities 
purchased prior to that date) or for debt securities that are beneficial interests in securitized financial assets, at a rate equal to the current yield 
used to accrete the beneficial interest. For floating rate securities, future cash flows and the discount rate used were both adjusted to reflect 
changes in the index rate applicable to each security as of the evaluation date. Of the securities that were in a gross unrealized loss position 
at December 31, 2017, $1,855,694 of the total fair value and $100,503 of the unrealized loss related to below investment grade and non-rated 
securities. Of the securities that were in a gross unrealized loss position at December 31, 2016, $890,952 of the total fair value and $53,273 
of the unrealized loss related to below investment grade and non-rated securities.  As discussed further below, most of the securities in a gross 
unrealized loss position that are below investment grade or non-rated are guaranteed by Ambac Assurance.   Ambac’s assessment about whether 
a decline in value is other-than-temporary reflects management’s current judgment regarding facts and circumstances specific to a security 
and the factors noted above.  If that judgment changes, Ambac may ultimately record a charge for other-than-temporary impairment in future 
periods.

Municipal obligations

The gross unrealized losses on municipal obligations as of December 31, 2017 are primarily the result of the price declines on Ambac-insured 
Puerto  Rico  bonds,  especially  Puerto  Rico  Sales Tax  Financing  Corporation's  Senior  Sales Tax  Revenue  bonds.   These  bonds  are  below 
investment grade, long-dated zero coupon securities subject to higher than average price volatility that suffered additional downward price 
movement in late 2017 following the hurricanes that impacted Puerto Rico.  Management has the ability and intent to hold these bonds and 
by virtue of the Ambac financial guarantee, believes that it is probable that all amounts due on the bonds will be paid timely and in full.   

| Ambac Financial Group, Inc.   130   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Corporate obligations

The gross unrealized losses on corporate obligations as of December 31, 2016 and to a lesser extent at December 31, 2017 resulted from an  
increase in interest rates since purchase (or the Fresh Start Reporting Date of April 30, 2013 if owned as of that date). These securities are 
primarily fixed-rate securities with an investment grade credit rating. Management believes that the timely receipt of all principal and interest 
on these positions is probable.

Residential mortgage-backed securities

Of  the  $30,482  of  unrealized  losses  on  residential  mortgage-backed  securities,  $30,482  is  attributable  to Ambac  insured  securities. The 
unrealized loss on these securities is primarily the result of discount accretion, which has exceeded the increase in fair value since either the 
purchase date or Fresh Start Reporting Date of April 30, 2013 for securities owned prior to such date.  As part of the quarterly impairment 
review process, management estimates expected future cash flows from residential mortgage-backed securities. This approach includes the 
utilization of market accepted software models in conjunction with detailed data of the historical performance of the collateral pools, which 
assists in the determination of assumptions such as defaults, severity and voluntary prepayment rates that are largely driven by home price 
forecasts as well as other macro-economic factors.  Additionally, for Ambac insured securities that were allocated to the Segregated Account, 
expected future cash flows included assumptions about the timing  and amount of Ambac Assurance claim payments, including interest on 
Deferred Amounts, although the actual timing of such payments were at the sole discretion of the Rehabilitator.  These assumptions are used 
to project future cash flows for each security and at December 31, 2017 incorporate the 6.5% discount on the settlement of Deferred Amounts 
as part of the Rehabilitation Exit Transactions described in Note 1.   Management considered this analysis in making our determination that 
a credit loss has not occurred at December 31, 2017 on these transactions.

Realized Gains and Losses and Other-Than-Temporary Impairments:

The following table details amounts included in net realized gains (losses) and other-than-temporary impairments included in earnings for the 
affected periods:

Year Ended December 31,

Gross realized gains on securities

Gross realized losses on securities

Foreign exchange (losses) gains

Net realized gains

Net other-than-temporary impairments (1)

2017

2016

2015

29,080

$

17,344

$

(18,945)

(4,769)

(8,239)

30,179

5,366

$

39,284

$

(20,171) $

(21,819) $

58,218

(10,558)

5,816

53,476

(25,659)

$

$

$

(1)  Other-than-temporary impairments exclude impairment amounts recorded in other comprehensive income under ASC Paragraph 320-10-65-1, which 
comprise non-credit related amounts on securities that are credit impaired but which management does not intend to sell and it is not more likely than not 
that the company will be required to sell before recovery of the amortized cost basis.

Since commencement of the Segregated Account Rehabilitation Proceedings, changes in the estimated timing of claim payments have resulted 
in adverse changes in projected cash flows on certain impaired Ambac insured securities. Such changes in estimated claim payments on Ambac 
insured securities contributed to net other-than-temporary impairments for the periods presented in the table above.  Future changes in our 
estimated liquidity needs could result in a determination that Ambac no longer has the ability to hold securities that are in an unrealized loss 
position, which could result in additional other-than-temporary impairment charges.

The following table presents a roll-forward of Ambac’s cumulative credit losses on debt securities held as of December 31, 2017 and 2016
for which a portion of an other-than-temporary impairment was recognized in other comprehensive income:

Year Ended December 31,

Balance, beginning of period

Additions for credit impairments recognized on:

Securities not previously impaired

Securities previously impaired

Balance, end of period

2017

2016

2015

52,070

$

31,176

$

14,062

3,310

11,705

3,572

17,322

67,085

$

52,070

$

10,900

6,214

31,176

$

$

Counterparty Collateral, Deposits with Regulators and Other Restrictions:

Ambac routinely pledges and receives collateral related to certain transactions. Ambac pledges cash and securities it holds in its investment 
portfolio  to  investment  agreement  (prior  to  repayment  in  March  2017)  and  derivative  counterparties,  as  collateral.  Securities  pledged  to 
investment agreement counterparties were not to be re-pledged to another entity. Ambac’s counterparties under derivative agreements have 
the right to pledge or rehypothecate the securities and as such, these pledged securities are separately classified on the Consolidated Balance 
Sheets as “Fixed income securities pledged as collateral, at fair value”.

| Ambac Financial Group, Inc.   131   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The following table presents collateral owned by Ambac that was pledged to investment agreement and derivative counterparties at December 
31, 2017 and 2016:

December 31, 2017:

Pledged cash and securities owned by Ambac

December 31, 2016:

Pledged cash and securities owned by Ambac

Fair value of
cash and
securities
pledged to
investment
agreement
counterparties

Fair value of
cash and
securities
pledged to
derivative
counterparties

Fair value of
cash and
underlying
securities

120,645

$

— $

120,645

291,545

$

88,940

$

202,605

$

$

Securities carried at $5,974 and $5,872 at December 31, 2017 and 2016, respectively, were deposited by Ambac Assurance and Everspan with 
governmental authorities or designated custodian banks as required by laws affecting insurance companies.

Securities with fair value of $346,212 and $360,759 at December 31, 2017 and 2016, respectively, were held by a bankruptcy remote trust to 
collateralize and fund repayment of debt issued through a securitization transaction. The securities may not be sold or repledged by the trust. 
These assets are held and the secured debt is issued by entities that qualify as VIEs and are consolidated in Ambac’s consolidated financial 
statements. Refer to Note 3. Special Purpose Entities, Including Variable Interest Entities for a further description of this transaction.

Guaranteed Securities:

Ambac’s fixed income portfolio includes securities covered by guarantees issued by Ambac Assurance and other financial guarantors (“insured 
securities”). The published rating agency ratings on these securities reflect the higher of the financial strength rating of the financial guarantor 
or the rating of the underlying issuer. Rating agencies do not always publish separate underlying ratings (those ratings excluding the insurance 
by the financial guarantor). In the event these underlying ratings are not available from the rating agencies, Ambac will assign an internal 
rating. The following table represents the fair value, including the value of the financial guarantee, and weighted-average underlying rating, 
excluding the financial guarantee, of the insured securities at December 31, 2017 and 2016, respectively: 

Municipal
obligations

Corporate
obligations

Mortgage
and asset-
backed
securities

Weighted
Average
Underlying
Rating (1)

Total

December 31, 2017:
Ambac Assurance Corporation (2)

National Public Finance Guarantee

Corporation

Assured Guaranty Municipal Corporation

Total

December 31, 2016:
Ambac Assurance Corporation (2)

National Public Finance Guarantee

Corporation

Assured Guaranty Municipal Corporation

MBIA Insurance Corporation

Total

$

$

$

$

706,715

$

32,660

$

2,702,887

$

3,442,262

20,733

5,998

—

—

—

—

20,733

5,998

733,446

$

32,660

$

2,702,887

$

3,468,993

81,651

$

— $

2,739,073

$

2,820,724

38,687

25,660

—

—

—

2,630

—

—

—

38,687

25,660

2,630

145,998

$

2,630

$

2,739,073

$

2,887,701

CC

BBB-

BBB+

CC

CC

A-

AA

BBB+

CC  

(1)  Ratings are based on the lower of Standard & Poor’s or Moody’s rating. If unavailable, Ambac’s internal rating is used.

(2) 

Includes corporate obligations and asset-backed securities with a fair value of $170,280 and $118,813 at December 31, 2017 and 2016, respectively, 
insured by Ambac UK.

| Ambac Financial Group, Inc.   132   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Equity Interests:

Ambac's investment portfolio includes equity interests in various pooled investment funds, which are classified as trading.  The fair value and 
additional information about such investments in pooled funds, by investment type, is summarized in the table below.  Except as noted in the 
table, fair value reported is determined using NAV per share as a practical expedient.  There are no unfunded commitments applicable to any 
of these investments for the periods disclosed.

Class of Funds
Real estate properties (1)
Diversified hedge fund strategies (2)
Interest rate products (3) (7)
Illiquid investments (4)
Insurance-linked investments (5)
Equity market investments (6) (7)

December 31,
2017

December 31,
2016

Redemption frequency

Redemption notice period

$

33,154

$

33,303

quarterly

53,054

136,603

67,787

22,666

53,675

10 business days

15 - 30 days

53,985

semi-monthly

261,315

daily, weekly or monthly

0 - 30 days

39,068

quarterly

— quarterly

32,633

daily

180 days

90-120 days

0 days

Total equity investments in pooled funds

$

366,939

$

420,304

(1)    Investments consist of UK property to generate income and capital growth.

(2)    Investments seek diversified exposure to hedge fund core strategies to produce high risk-adjusted returns, with low long-term correlation to traditional 

markets and with targeted volatility levels. Funds may have the right to defer redemptions under certain circumstances.

(3)    This class of funds includes investments in a range of instruments including leveraged loans, CLOs, asset-backed securities and floating rate notes to 
generate income and capital appreciation.  Funds with less frequent redemption periods limit redemptions to as little as 15% per period.  Funds with a 
same day redemption notice period are redeemable only weekly, while funds that may be redeemed any business day have notice periods of 15-30 days. 

(4)   This class seeks to obtain high long-term total return through investments with low liquidity and defined term, resulting in expected capital distributions 

to subscribers between 2020 and 2023.  Redemptions cannot occur prior to the expiration of the investment lock-up period in May 2018.

(5)  This class aims to provide returns from the insurance and reinsurance markets through investments in catastrophe bonds, life insurance and other insurance 
linked investments.  Redemption periods are quarterly, subject to 90-day notice for January/July redemption dates and 120-day notice for April/October 
redemption dates with redemptions greater than 3.5% during the first five years following share issuance subject to redemption fees.

(6) 

Investments represent a diversified exposure to global equity market returns through holdings of various regional market index funds. 

(7)   Interest rate products include $2,823 at December 31, 2017 and $51,158 at December 31, 2016 and equity market investments include $53,675 at December 

31, 2017 and $32,633 at December 31, 2016 that have readily determinable fair.

Ambac also holds interests in an unconsolidated trust created in connection with the 2014 sale of Segregated Account junior surplus notes.  
The investment in debt securities is accounted for as trading and the equity interest is accounted for under the equity method and included in 
Other Investments on the Consolidated Balance Sheets.

Investment Income:

Net investment income was comprised of the following for the affected periods:

Year Ended December 31,

Fixed income securities

Short-term investments

Loans

Investment expense

Securities available-for-sale and short-term

Other investments

Total net investment income

2017

2016

2015

$

337,454

$

288,554

$

257,404

7,898

520

(8,098)

337,774

23,179

1,505

337

(9,347)

281,049

32,318

$

360,953

$

313,367

$

299

420

(8,786)

249,337

16,952

266,289

Net investment income from Other investments primarily represents changes in fair value on securities classified as trading or under the fair 
value option plus, income from Ambac's interests in an unconsolidated trust created in connection with its sale of Segregated Account junior 
surplus notes.  The portion of net unrealized gains (losses) related to trading securities still held at the end of each period is as follows: 

Year Ended December 31,

Net gains (losses) recognized during the period on trading securities

Less: net gains (losses) recognized during the reporting period on trading securities sold

during the period

Unrealized gains (losses) recognized during the reporting period on trading securities

still held at the reporting date

$

$

2017

2016

2015

18,242

$

27,654

$

12,615

4,854

7,474

13,388

$

20,180

$

4,966

7,649

| Ambac Financial Group, Inc.   133   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

11. 

DERIVATIVE INSTRUMENTS 

The following tables summarize the gross fair values of individual derivative instruments and the impact of legal rights of offset as reported 
in the Consolidated Balance Sheets as of December 31, 2017 and 2016.

December 31, 2017:

Derivative Assets:

Interest rate swaps

Total non-VIE derivative assets

Derivative Liabilities:

Credit derivatives

Interest rate swaps

Futures contracts

Total non-VIE derivative liabilities

Variable Interest Entities Derivative Assets:

Currency swaps

Total VIE derivative assets

Variable Interest Entities Derivative Liabilities:

Interest rate swaps

Total VIE derivative liabilities

December 31, 2016:

Derivative Assets:

Interest rate swaps

Futures contracts

Total non-VIE derivative assets

Derivative Liabilities:

Credit derivatives

Interest rate swaps

Total non-VIE derivative liabilities

Variable Interest Entities Derivative Assets:

Currency swaps

Total VIE derivative assets

Variable Interest Entities Derivative Liabilities:

Interest rate swaps

Total VIE derivative liabilities

Gross
amounts of
recognized
assets /
liabilities

Gross
amounts
offset in the
consolidated
balance sheet

Net amounts
of assets/
liabilities
presented
in the
consolidated
balance sheet

Gross amount
of collateral
received /
pledged not
offset in the
consolidated
balance sheet

Net amount

$

$

73,826

73,826

566

81,495

1,348

627

627

$

— $

627

—

$

$

73,199

73,199

566

80,868

1,348

—

— $

— $

79,912

1,348

73,199

73,199

566

956

—

83,409

$

627

$

82,782

$

81,260

$

1,522

54,877

54,877

2,205,264

2,205,264

139,045

536

139,581

15,349

365,776

381,125

80,407

80,407

2,078,601

2,078,601

$

$

$

$

$

$

$

$

$

$

$

—

— $

54,877

54,877

— $

— $

2,205,264

2,205,264

61,839

—

61,839

$

$

— $

61,839

61,839

$

77,206

536

77,742

15,349

303,937

319,286

— $

— $

80,407

80,407

— $

— $

2,078,601

2,078,601

$

$

$

$

$

$

$

$

$

$

$

—

— $

54,877

54,877

— $

— $

2,205,264

2,205,264

— $

—

— $

— $

156,925

156,925

$

77,206

536

77,742

15,349

147,012

162,361

— $

— $

80,407

80,407

— $

— $

2,078,601

2,078,601

$

$

$

$

$

$

$

$

$

$

$

$

$

$

Effective January 3, 2017, the central clearing party ("CCP") for certain of Ambac's derivative contracts changed its rules governing the 
character of variation payments.  Under the new CCP rules, variation payments are considered settlements of the associated derivative balance. 
Prior to the rule change such variation payments were considered to be margin and were not offset against the fair value of the derivatives, 
but were recognized as collateral receivable or payable.  The amount of variation margin included within "Other assets" on the Consolidated 
Balance Sheet as of December 31, 2016, and was applied as a reduction to derivative liabilities effective January 3, 2017 under the new CCP 
rules is $71,023.  Amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against 
fair value amounts recognized for derivative instruments on the Consolidated Balance Sheets. The amounts representing the right to reclaim 
cash collateral and posted margin, recorded in “Other assets” were $20,926 and $137,701 as of December 31, 2017 and 2016, respectively. 
There were no amounts held representing an obligation to return cash collateral as of December 31, 2017 and 2016. 

The following tables summarize the location and amount of gains and losses of derivative contracts in the Consolidated Statements of Total 
Comprehensive Income (Loss) for the year ended December 31, 2017 and 2016:

| Ambac Financial Group, Inc.   134   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Location of gain (loss) recognized
in Consolidated Statements of
Total Comprehensive Income (Loss)

Amount of gain (loss) recognized in Consolidated 
Statement of Total Comprehensive Income (Loss) – 
Year Ended December 31,

2017

2016

2015

Net change in fair value of credit derivatives

$

16,372

$

20,106

$

41,701

Net gains (losses) on interest rate derivatives

Net gains (losses) on interest rate derivatives

Income (loss) on variable interest entities

Income (loss) on variable interest entities

48,870

10,695

59,565

(25,530)

(126,664)

(152,194)

(50,082)

(191)

(50,273)

58,990

(574,554)

(515,564)

$

(76,257) $

(545,731) $

(41,177)

(1,367)

(42,544)

103,757

168,003

271,760

270,917

Non-VIEs:

Credit derivatives

Non VIE derivatives:

Interest rate swaps

Futures contracts

Total non-VIE derivatives

Variable Interest Entities:

Currency swaps

Interest rate swaps

Total Variable Interest Entities

Total derivative contracts

Credit Derivatives:

Credit derivatives, which are privately negotiated contracts, provide the counterparty with credit protection against the occurrence of a specific 
event such as a payment default or bankruptcy relating to an underlying obligation.  Credit derivatives issued are insured by Ambac Assurance. 
None of the outstanding credit derivative transactions at December 31, 2017 include ratings based collateral-posting triggers or otherwise 
require Ambac to post collateral regardless of Ambac’s ratings or the size of the mark to market exposure to Ambac.

The portfolio of our credit derivatives were written on a “pay-as-you-go” basis. Similar to an insurance policy execution, pay-as-you-go 
provides that Ambac pays interest shortfalls on the referenced transaction as they are incurred on each scheduled payment date, but only pays 
principal shortfalls upon the earlier of (i) the date on which the assets designated to fund the referenced obligation have been disposed of and 
(ii) the legal final maturity date of the referenced obligation.

Ambac maintains internal credit ratings on its guaranteed obligations, including credit derivative contracts, solely to indicate management’s 
view of the underlying credit quality of the guaranteed obligations. Independent rating agencies may have assigned different ratings on the 
credits  in Ambac’s  portfolio  than Ambac’s  internal  ratings. The  following  summarizes  the  gross  principal  notional  outstanding  for  CDS 
contracts, by Ambac rating as of December 31, 2017 and 2016:

Ambac Rating

December 31,

AAA

AA

A
BBB (1)
Below investment grade (2)

Total

2017

2016

— $

175,765

—

150,125

—

325,890

$

—

315,201

227,146

127,250

67,783

737,380

$

$

(1)  BBB internal ratings reflect bonds which are of medium grade credit quality with adequate capacity to pay interest and repay principal. Certain protective 
elements and margins may weaken under adverse economic conditions and changing circumstances. These bonds are more likely than higher rated bonds 
to exhibit unreliable protection levels over all cycles.

(2)  Below investment grade internal ratings reflect bonds which are of speculative grade credit quality with the adequacy of future margin levels for payment 

of interest and repayment of principal potentially adversely affected by major ongoing uncertainties or exposure to adverse conditions.

Interest Rate Derivatives:

Ambac, through its subsidiary Ambac Financial Services (“AFS”), provides interest rate swaps to counterparties and as of December 31, 2017 
and 2016 the notional amounts of its derivatives are as follows:

Type of derivative

Interest rate swaps—receive-fixed/pay-variable

Interest rate swaps—pay-fixed/receive-variable

US Treasury futures contracts—short

Notional - December 31,

2017

2016

$

379,497

$

1,428,264

1,655,000

973,130

1,874,678

195,000

| Ambac Financial Group, Inc.   135   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

On June 27, 2017, Ambac entered into a termination agreement with various parties, including Augusta, in connection with the commutation 
of interest rate swaps between Augusta and AFS.  Ambac paid $94,407 under the termination agreement and reported a gain on the Augusta 
swaps of $43,443. 

Derivatives of Consolidated Variable Interest Entities

Certain VIEs consolidated under the Consolidation Topic of the ASC entered into derivative contracts to meet specified purposes within the 
securitization structure. The notional for VIE derivatives outstanding as of December 31, 2017 and 2016 are as follows:

Type of VIE derivative

Interest rate swaps—receive-fixed/pay-variable

Interest rate swaps—pay-fixed/receive-variable

Currency swaps

Credit derivatives

Notional - December 31,

2017

2016

$

1,483,491

$

2,479,244

394,541

12,100

1,352,010

2,300,584

312,357

12,059

Contingent Features in Derivatives Related to Ambac Credit Risk

Ambac’s over-the-counter interest rate swaps are centrally cleared when eligible. Certain interest rate swaps remain with professional swap-
dealer counterparties and certain front-end counterparties. These non-cleared swaps are generally executed under standardized derivative 
documents including collateral support and master netting agreements. Under these agreements, Ambac is required to post collateral in the 
event  net  unrealized  losses  exceed  predetermined  threshold  levels. Additionally,  given  that Ambac Assurance  is  no  longer  rated  by  an 
independent rating agency, counterparties have the right to terminate the swap positions.

As of December 31, 2017 and 2016, the net liability fair value of derivative instruments with contingent features linked to Ambac’s own credit 
risk was $79,912 and $82,944, respectively, related to which Ambac had posted cash and securities as collateral with a fair value of $111,391
and $128,754, respectively. All such ratings-based contingent features have been triggered as requiring maximum collateral levels to be posted 
by Ambac while preserving counterparties’ rights to terminate the contracts. Assuming all such contracts terminated on December 31, 2017, 
settlement of collateral balances and net derivative liabilities would result in a net receipt of cash and/or securities by Ambac. If counterparties 
elect to exercise their right to terminate, the actual termination payment amounts will be determined in accordance with derivative contract 
terms, which may result in amounts that differ from market values as reported in Ambac’s financial statements.

12. 

LOANS 

Loans had been extended: (i) by VIEs which are consolidated by Ambac under ASC Topic 810 as a result of Ambac’s financial guarantees of 
the VIEs’ note liabilities and/or assets and (ii) to certain institutions in connection with various transactions. 

Loans by consolidated VIEs are generally carried at fair value on the Consolidated Balance Sheets. See Note 3. Special Purpose Entities, 
Including Variable Interest Entities for further information about VIEs for which the assets and liabilities are carried at fair value. 

Other loans had an outstanding principal balance of $20,184 and $4,873 at December 31, 2017 and 2016, respectively.  The interest rate on 
these loans ranged from 0.00% to 4.58% at December 31, 2017 and were 4.53% December 31, 2016. The maturity date of these loans ranged 
from June 2026 to December 2046 as of December 31, 2017 and were June 2026 as of December 31, 2016.  Collectability of these loans is 
evaluated on an ongoing basis; no loan has been considered impaired and as such no loan impairments have been recorded as of December 
31, 2017 and 2016.

13. 

LONG-TERM DEBT 

The carrying value of long-term debt was as follows:

December 31,

Ambac Assurance:

5.1% surplus notes, general account, due 2020

5.1% surplus notes, segregated account, due 2020

5.1% junior surplus notes, segregated account, due 2020

Secured borrowing

Ambac Assurance long-term debt

Variable Interest Entities long-term debt

2017

2016

$

$

$

668,667

$

—

249,036

73,993

991,696

12,160,544

$

$

730,648

33,107

248,247

102,403

1,114,405

11,155,936

| Ambac Financial Group, Inc.   136   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Surplus Notes, General Account

Ambac Assurance surplus notes, with a par amount of $754,811 and $862,945 at December 31, 2017 and 2016, respectively, are reported in 
long-term debt on the Consolidated Balance Sheet and have a scheduled maturity of June 7, 2020. In 2017 and 2016, Ambac purchased 
$108,134 and  $11,804 par amount of these surplus notes, respectively. The gains on these repurchases were  $3,603 and $1,677, and recognized 
in Net realized gains (losses) on extinguishment of debt of the Consolidated Statements of Total Comprehensive Income for the years ended 
December 31, 2017 and 2016, respectively.  These surplus notes were issued in connection with the Settlement Agreement and were recorded 
at their fair value at the date of issuance. The discount on these notes is currently being accreted into income using the effective interest method 
at an imputed interest rate of of 10.5%. All payments of principal and interest on these surplus notes are subject to the prior approval of the 
OCI. If the OCI does not approve the payment of interest on these surplus notes, such interest will accrue and compound annually until paid. 
OCI disapproved the requests of Ambac Assurance to pay interest on the outstanding Ambac Assurance surplus notes on their respective 
scheduled interest payment dates since their issuance.  

Surplus Notes, Segregated Account

The Segregated Account surplus notes, with a par amount of $0 and $39,102 at December 31, 2017 and 2016, respectively, are reported in 
long-term debt on the Consolidated Balance Sheets and have a scheduled maturity of June 7, 2020. In 2017, Ambac purchased $39,102 par 
amount of these surplus notes. The gains on these repurchases were $212 and recognized in Net realized gains (losses) on extinguishment of 
debt of the Consolidated Statements of Total Comprehensive Income. These surplus notes were recorded at their fair value at the date of 
issuance. The discount on these notes was being accreted into income using the effective interest method at an imputed interest rate of 10.5%. 
All payments of principal and interest on the these surplus notes are subject to the prior approval of the OCI. If the OCI does not approve the 
payment of interest on these surplus notes, such interest will accrue and compound annually until paid. OCI disapproved of the requests of 
the Rehabilitator of the Segregated Account, acting for and on behalf of the Segregated Account, to pay interest on the outstanding Segregated 
Account surplus notes on their respective scheduled interest payment dates since their issuance.  Pursuant to the Second Amended Plan of 
Rehabilitation, Ambac Assurance became the obligor under the Segregated Account surplus notes as of February 12, 2018.

Junior Surplus Notes, Segregated Account

The Segregated Account junior surplus notes, with a par value of $370,237 and $374,036 at December 31, 2017 and 2016, respectively, are 
reported  in  long-term  debt  on  the  Consolidated  Balance  Sheets  and  have  a  scheduled  maturity  of  June 7,  2020,  subject  to  the  following 
restrictions.  Pursuant to the Second Amended Plan of Rehabilitation, Ambac Assurance became the obligor under the junior surplus notes as 
of February 12, 2018. Principal and interest payments on these junior surplus notes cannot be made until all Ambac Assurance surplus notes 
(other than junior surplus notes) are paid in full and after all of Ambac Assurance's future and existing senior indebtedness, policy and other 
priority claims have been paid in full. All payments of principal and interest on these junior surplus notes are subject to the prior approval of 
the OCI. If the OCI does not approve the payment of interest on the junior surplus notes, such interest will accrue and compound annually 
until paid. No such approval has been sought or obtained to pay interest on junior surplus notes since their issuance. 

• 

• 

Par value at December 31, 2017 and 2016 includes $20,237 and $24,037, respectively, of junior surplus notes issued in connection 
with a settlement agreement (the “OSS Settlement Agreement”) entered into among Ambac, Ambac Assurance, the Segregated Account 
and One State Street, LLC (“OSS”) with respect to the termination of Ambac’s office lease with OSS. Part of these junior surplus notes 
($13,056 par value) will be reduced periodically as rent payments are made by Ambac Assurance beginning in January 2016. Par value 
of these junior surplus notes have been reduced by $3,799 and $4,002 during 2017 and 2016, respectively, as rent payments were made 
by Ambac Assurance. These junior surplus notes were recorded at their fair value at the dates of issuance. The discount on these notes 
are currently being accreted into income using the effective interest method at an imputed interest rate of 19.5%.  

Par value at December 31, 2017 and 2016 includes $350,000 face amount of a junior surplus note originally issued to Ambac pursuant 
to Ambac's  Reorganization  Plan  in  accordance  with  the  Mediation Agreement  dated  September  21,  2011  among Ambac, Ambac 
Assurance, the Segregated Account, the Rehabilitator, the OCI and the Official Committee of Unsecured Creditors of Ambac, and that 
Ambac sold to a Trust on August 28, 2014. This junior surplus note was recorded at a discount to par based on its fair value on August 
28, 2014. Ambac is accreting the discount on this junior surplus note into earnings using the effective interest method, based on an 
imputed interest rate of 8.4%. 

Secured Borrowing

The secured borrowing, with a par value of $73,993 and $102,986 at December 31, 2017 and 2016, respectively, is reported in long-term debt 
on the Consolidated Balance Sheets and has a legal maturity of July 25, 2047.  Interest on the secured borrowing is payable monthly at an 
annual rate of one month LIBOR + 2.8%. Refer to Note 3. Special Purpose Entities, Including Variable Interest Entities for further discussion 
on the secured borrowing transaction. 

| Ambac Financial Group, Inc.   137   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Variable Interest Entities, Long-term Debt

The variable interest entity notes were issued by consolidated VIEs.  Ambac is the primary beneficiary of the VIEs as a result of providing 
financial guarantees on certain of the the variable interest obligations. Consequently, Ambac has consolidated these variable interest entity 
notes and all other assets and liabilities of the VIEs. Ambac is not primarily liable for the debt obligations of these entities. Ambac would only 
be required to make payments on these debt obligations in the event that the issuer defaults on any principal or interest due and to the extent 
such obligations are guaranteed by Ambac. The total unpaid principal amount of outstanding long-term debt associated with VIEs consolidated 
as a result of the financial guarantee provided by Ambac was $9,387,884 and $8,854,530 as of December 31, 2017 and 2016, respectively. 
The range of final maturity dates of the outstanding long-term debt associated with these VIEs is November 2018 to December 2047 as of 
December 31, 2017 and 2016.  As of December 31, 2017 and 2016, the interest rates on these VIEs’ long-term debt ranged from 0.96% to 
8.35% and from 0.82% to 13.00%, respectively.  Final maturities of VIE long-term debt for each of the five years following December 31, 
2017 are as follows: 2018-$141,327; 2019-$307,915; 2020-$44,100; 2021-$94,024; 2022-$0.

14. 

INCOME TAXES 

Ambac files a consolidated U.S. Federal income tax return with its subsidiaries. Ambac and its subsidiaries also file separate or combined 
income tax returns in various states, local and foreign jurisdictions. The following are the major jurisdictions in which Ambac and its subsidiaries 
operate and the earliest tax years subject to examination:

Jurisdiction

United States

New York State

New York City

United Kingdom

Italy

Tax Year

2010

2013

2014

2014

2013

On December 22, 2017, H.R. 1. (commonly referred to as the Tax Cut and Jobs Act or "TCJA") was enacted and significantly changed the 
tax code effective January 1, 2018. We incorporated the effects of the TCJA in our current and deferred tax evaluation for the year ended 
December 31, 2017.  Given the complexity of the TCJA and the limited time between its enactment and the filing of year-end financial 
statements, the SEC issued guidance (SAB 118), which provides a one-year measurement period for companies to finalize the accounting for 
the impact of the TCJA. Ambac has recorded the income tax effect of those aspects of the TCJA for which the accounting is completed and 
recorded provisional amounts for those aspects for which the accounting is incomplete.  

In connection with our preliminary analysis of the TCJA, Ambac recorded an estimated discrete current benefit of $29,581 (net of an estimated 
6.6% Congressional budget sequestration haircut) related to the repeal of the Alternative Minimum Tax ("AMT") and deferred taxes of $31,418
attributable to Ambac UK, including the effect of the TCJA changes relating to unrealized gains on investments, resulting in an estimated net 
cost of $1,886.  The AMT credit will be refunded in installments through 2021 or sooner based upon taxable income. 

Ambac has not completed its accounting analysis of the TCJA's impact on moving to a new quasi-territorial worldwide tax system, the primary 
effect of which is a mandatory repatriation of Ambac UK's historical earnings.  Accordingly, the provisions related to these international tax 
changes have been recorded as estimates.  Ambac has also not completed the accounting analysis on provisions related to executive compensation 
and, therefore, recorded these amounts as estimates.

As of December 31, 2017 Ambac had U.S. federal net operating loss tax carryforwards of approximately $3,694,844, which, if not utilized, 
will begin expiring in 2029, and will fully expire in 2032.

| Ambac Financial Group, Inc.   138   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The tax effects of temporary differences that give rise to significant portions of the deferred tax liabilities and deferred tax assets at December 
31, 2017 and 2016 are presented below:

December 31,

Deferred tax liabilities:

Insurance intangible

Variable interest entities

Investments

Unearned premiums and credit fees

Unremitted foreign earnings

Other

Total deferred tax liabilities

Deferred tax assets:

Net operating loss and capital carryforward

Loss reserves

Compensation

AMT Credits

Other

Subtotal deferred tax assets

Valuation allowance

Total deferred tax assets

Net deferred tax (liability)

2017

2016

$

177,864

$

336,728

22,817

28,798

51,485

—

9,402

46,343

38,656

68,682

30,699

4,276

290,366

525,384

775,917

236,237

5,585

—

2,140

1,019,879

763,172

256,707

(33,659)

1,409,565

224,553

4,759

31,532

11,967

1,682,376

1,158,712

523,664

(1,720)

In accordance with the Income Tax Topic of the ASC, a valuation allowance is recognized if, based on the weight of available evidence, it is 
more-likely-than-not that some, or all, of the deferred tax asset will not be realized. With respect to Ambac's domestic subsidiaries subject to 
U.S. tax, as a result of the risks and uncertainties associated with future operating results, management believes it is more likely than not that 
the Company will not generate sufficient taxable income to recover the deferred tax operating asset and therefore maintains a full valuation 
allowance. The remaining net deferred tax liability of $33,659 is attributable to Ambac U.K.

U.S. and foreign components of pre-tax income (loss) were as follows:

Year Ended December 31,

U.S.

Foreign

Total

The components of the provision (benefit) for income taxes were as follows:

Year Ended December 31,

Current taxes

U. S. federal

U.S. state and local

Foreign

Current taxes

Deferred taxes

Deferred taxes - foreign

Provision for income taxes

2017

2016

2015

(450,978) $

166,727

(284,251) $

77,161

27,865

105,026

$

$

337,753

172,305

510,058

2017

2016

2015

(29,581) $

3,934

$

16,893

2,013

40,613

13,045

707

26,088

30,729

31,419

44,464

$

(20)

30,709

$

182

2

17,077

287

17,364

$

$

$

$

| Ambac Financial Group, Inc.   139   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The total effect of income taxes on net income and stockholders’ equity for the years ended December 31, 2017, 2016 and 2015 is as follows: 

Year Ended December 31,

Total income taxes charged to net income

Income taxes charged (credited) to stockholders’ equity:

Unrealized gains (losses) on investment securities

Unrealized gains (losses) on foreign currency translations

Change in retirement benefits

Valuation allowance to equity

Total effect of income taxes

2017

2016

2015

44,464

$

30,709

$

17,364

(30,838)

25,776

446

4,616

41,602

(58,527)

3,278

13,647

44,464

$

30,709

$

(55,906)

(15,628)

(240)

71,774

17,364

$

$

The  tax  provisions  in  the  accompanying  Consolidated  Statements  of Total  Comprehensive  Loss  reflect  effective  tax  rates  differing  from 
prevailing Federal corporate income tax rates. The following is a reconciliation of these differences: 

Year Ended December 31,

Amount

%

Amount

%

Amount

%

Tax on income from continuing operations at statutory rate $

(99,488)

35.0 % $

36,759

35.0 % $

178,521

35.0 %

2017

2016

2015

Changes in expected tax resulting from:

Tax-exempt interest

Goodwill impairment

Foreign taxes

Substantiation adjustment

Valuation allowance

Change in Tax Law

Other, net

(6,004)

—

(17,742)

36,124

127,675

1,886

2,013

2.1 %

— %

6.2 %

(12.7 )%

(44.9 )%

(0.7 )%

(0.7 )%

(1,561)

—

26,183

(171,687)

139,584

—

1,431

(1.5)%

— %

24.9 %

(163.5)%

132.9 %

— %

1.4 %

(1,454)

180,079

288

—

(0.3)%

35.3 %

0.1 %

— %

(340,133)

(66.7)%

—

63

Tax expense on income from continuing operations

$

44,464

(15.6)% $

30,709

29.2 % $

17,364

A reconciliation of the beginning and ending amount of unrecognized tax benefits for 2017, 2016 and 2015 is as follows: 

Year Ended December 31,

Balance, beginning of period

Increases related to prior year tax positions

Decreases related to prior year tax positions

Balance, end of period

2017

2016

2015

$

$

— $

—

—

— $

— $

—

—

— $

— %

— %

3.4 %

—

—

—

—

Included in these balances at December 31, 2017, 2016 and 2015 are $0, $0 and  $0, respectively, of unrecognized tax benefits that, if recognized, 
would affect the effective tax rate. During the years ended December 31, 2017, 2016 and 2015, Ambac recognized interest of approximately 
$0, $0 and $0, respectively. Ambac had approximately $0, $0 and $0, for the payment of interest accrued at December 31, 2017, 2016 and 
2015, respectively. 

NOL Usage 

Pursuant to the amended and restated tax sharing agreement among Ambac, Ambac Assurance and certain affiliates (the “Amended TSA"), 
to the extent Ambac Assurance generates taxable income after September 30, 2011, which is offset with "Allocated NOLs" of $3,650,000, it 
is obligated to make payments (“Tolling Payments”), subject to certain credits, to Ambac in accordance with the following NOL usage table, 
where the “Applicable Percentage” is applied to the aggregate amount of federal income tax liability that would have been paid if the Allocated 
NOLs were not available.  Pursuant to the Closing Agreement between Ambac and the Internal Revenue Service ("IRS"), the IRS will receive 
12.5% of Tier C and 17.5% of Tier D payments, if made.

| Ambac Financial Group, Inc.   140   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

NOL Usage Table 

NOL Usage
Tier

A

B

C

D

Allocated NOLs

The first $479,000

The next $1,057,000 after Tier A

The next $1,057,000 after Tier B

The next $1,057,000 after Tier C

Applicable
Percentage

15%

40%

10%

15%

Any post determination date NOLs generated by Ambac Assurance are utilized prior to any Allocated NOLs for which Tolling Payments will 
be due.  Ambac Assurance utilized all of its current post determination date NOLs generated from September 30, 2011 through December 31, 
2017, generating cumulative taxable income of $1,367,795.  Of the bankruptcy related credits available to offset the first $5,000 of payments 
due under each of the NOL usage Tiers A, B, and C, Ambac Assurance has fully utilized the combined $10,000 of  Tier A and Tier B credits.  
For the two years ended December 31, 2016, Ambac Assurance utilized all of the $479,000 Tier A NOL and $607,124 of the $1,057,000 Tier 
B NOL resulting in Tolling Payments , net of applicable credits, of $100,145, of which $71,454 was paid to Ambac in 2016 and $28,691 was 
paid in 2017.  During the year ended December 31, 2017, Ambac Assurance recorded additional estimated Tolling Payments of $31,133, which 
includes $637 of additional tolling resulting from the  filing Ambac's 2016 tax return that was paid in December 2017.  The balance of $30,496
will be paid to Ambac in May 2018. 

Beginning on the fifth anniversary date subsequent to Ambac's May 1, 2013, emergence from bankruptcy, and subject to Ambac's consent, 
not  to  be  unreasonably  withheld,  to  the  extent Ambac Assurance  generates  post-determination  date  income  in  excess  of  the  $3,650,000, 
Allocated NOLs, Ambac Assurance may utilize the remaining NOLs, previously reserved for usage by Ambac, in exchange for a payment of 
25% of the federal income tax liability that Ambac Assurance would have been paid had Ambac's NOLs not been available. 

After Ambac fully utilizes its Allocated NOLs it may utilize Ambac Assurance's then remaining Allocated NOLs in exchange for a payment 
of 50% of the federal income tax liability that Ambac would have paid had Ambac Assurance's NOL not been available.

As of December 31, 2017, the remaining balance of the $3,650,000 NOL allocated to Ambac Assurance was $2,282,205.  As of December 31, 
2017 Ambac's NOL was $1,412,639.

15. 

EMPLOYMENT BENEFIT PLANS 

Postretirement Health Care and Other Benefits: 

Ambac provides postretirement and postemployment / severance benefits, including health and life benefits for certain employees who meet 
certain age and service requirements. None of the plans are currently funded.  Postretirement and postemployment benefits expenses, including 
severance benefits paid, was $4,164, $8,846 and $2,570 for the years ended December 31, 2017, 2016 and 2015, respectively.

Effective August 1, 2005, new employees were not eligible for postretirement benefits. The current postretirement benefit requires retirees to 
purchase  their  own  medical  insurance  policy  with  a  portion  of  their  premium  being  reimbursed  by Ambac.  The  unfunded  accumulated 
postretirement benefit obligation was $7,820 as of December 31, 2017. The assumed health care cost trend rates range from 5.6% in 2018, 
decreasing ratably to 4.5% in 2025. Increasing the assumed health care cost trend rate by one percentage point in each future year would 
increase the accumulated postretirement benefit obligation at December 31, 2017, by $182 and the 2017 benefit expense by $11. Decreasing 
the assumed health care cost trend rate by one percentage point in each future year would decrease the accumulated postretirement benefit 
obligation at December 31, 2017 by $258 and the 2017 benefit expense by $17. 

The following table sets forth projected benefit payments from Ambac’s postretirement plan over the next ten years for current retirees: 

2018

2019

2020

2021

2022

2023-2027

Total

$

282

$

311

$

327

$

353

$

387

$

2,452

$

4,112

The discount rate used in determining the projected benefit obligations for the postretirement plan is selected by reference to the year-end 
Citigroup pension liability index with similar duration to that of the benefit plan. The rates used for the projected plan benefit obligations at 
the measurement date for December 31, 2017 and 2016 were 3.50% and 4.00%, respectively. 

Savings Incentive Plan: 

Substantially all employees of Ambac Assurance are covered by a defined contribution plan (the “Savings Incentive Plan”). Ambac Assurance 
makes employer matching contributions equal 100% of the employees’ contributions, up to 3% of such participants’ compensation, as defined 
in the plan, plus 50% of contributions up to an additional 2% of compensation, subject to limits set by the Internal Revenue Code. The total 
cost of the Savings Incentive Plan was $691, $911 and $1,042 for the years December 31, 2017, 2016 and 2015, respectively.

| Ambac Financial Group, Inc.   141   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Incentive Compensation - Stock Units and Cash:

Incentive compensation is a key component of our compensation strategy. Our incentive compensation awards generally have two components: 
short  term  incentive  compensation  or  annual  bonuses  and  long  term  incentive  plan  awards.   Annual  decisions  with  regard  to  incentive 
compensation are generally made in the first quarter of each year and are based on Company performance and individual and business unit 
performance of the previous year.  For all employees, an allocation of incentive compensation is made between annual bonuses and LTIP 
awards.  Beginning for the 2016 performance year, the annual bonus was settled via cash and vested restricted stock units for certain employees. 

Employees, directors and consultants of Ambac are eligible to participate in Ambac’s 2013 Incentive Compensation Plan (“2013 Plan”) subject 
to the discretion of the compensation committee of Ambac’s Board of Directors. The 2013 Plan provides for incentives and rewards that are 
valued or determined by reference to Ambac common stock as traded on the NASDAQ exchange. There are 4,000,000 shares of Ambac’s 
common stock authorized for awards under the 2013 Plan of which 2,793,323 shares are available for future grant as of December 31, 2017.

In March 2014, Ambac developed a long term incentive compensation plan (“LTIP”) as a sub-plan of the 2013 Plan. The LTIP is intended to 
be an annual program that allows for both cash and equity performance awards to certain US employees. Beginning with grants issued in 
2017, the entire LTIP award was issued as equity performance awards to employees.  

In 2015, Ambac UK 's Board of Directors adopted a long term incentive plan which provides cash based performance awards to Ambac UK 
employees.  Cash based compensation expense related to performance awards granted to Ambac UK employees was $2,159, $283 and $253
for the years ended December 31, 2017, 2016 and 2015, respectively. 

The amount of stock-based compensation expense and corresponding after-tax expense are as follows:

Year Ended December 31,

Stock options

Restricted stock units
Performance awards (2) (3)

Total stock-based compensation

Total stock-based compensation (after-tax)

2017 (1)

2016

2015

— $

— $

1,640

2,653

4,293

4,293

$

$

3,463

1,790

5,253

5,194

$

$

956

1,257

892

3,105

3,105

$

$

$

(1)  As discussed in Note 2. Basis of Presentation and Significant Accounting Policies , we adopted ASU 2016-09 as of January 1, 2017.  One of the provisions 
of this ASU requires entities to make an accounting policy election with respect to forfeitures of share-based payment awards.  We elected to account for 
forfeitures as they occur and adopted this provision of ASU 2016-09 using a modified retrospective approach resulting in recording a cumulative-effect 
adjustment to equity of $137.

(2)  Represents expense related to performance stock units portion of performance awards.  Certain performance awards are split evenly between performance 
stock units and cash.    Cash based compensation expense related to performance awards granted to US employees was $1,565, $1,790 and $892 for the 
years ended December 31, 2017, 2016 and 2015, respectively.  

(3)    A performance award issued to Ambac's former Chief Executive Officer in the form of performance stock units has yet to be expensed given the performance 

conditions have not been met.  

Stock Options: 

Stock options were awarded to the former Chief Executive Officer in 2015 (vested January 1, 2016), with an expiry term of seven years from 
the grant date, subject to earlier expiration upon the recipient's departure from the Company.  The Company intends to use Treasury shares 
first and then, if necessary, issue new shares to satisfy stock option exercises.  No stock options were awarded in 2016 or 2017. 

The Black-Scholes-Merton model was used to estimate the fair value of the service condition based stock options on the grant date. The 
following assumptions were used in estimating the fair value of options awarded in 2015: 

Year Ended December 31,

Risk-free interest rate

Expected volatility

Dividend yield

Expected life

Weighted-average grant-date fair value per share

2015

1.283%

42.8%

0.0%

4.13 years

$

8.69

The expected volatility is based on implied volatilities from traded options on Ambac’s stock, the historical volatility of Ambac’s stock and 
the historical volatilities of our peer industry group. Peer group historical volatilities were considered due to the fact that Ambac stock had 
been traded for a time period less than the expected life of the options. A zero dividend yield was assumed based on the uncertainty of Ambac 
making dividend payments over the expected life of these options. The risk-free interest rate reflects the U.S. Treasury yield curve in effect 

| Ambac Financial Group, Inc.   142   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

at the time of the grant. The expected life represents the period of time that options granted are expected to be outstanding and is based on 
certain factors we believe will influence exercise behavior. 

A summary of option activity for 2017 is as follows: 

Year Ended December 31, 2017

Outstanding at beginning of period

Granted

Exercised

Forfeited or expired

Outstanding at end of period

Exercisable

Shares

Weighted Average
Exercise Price

Aggregate
Intrinsic Value

Weighted Average
Remaining
Contractual
Life ( in years)

143,334

$

—

—

(16,667)

126,667

126,667

$

$

23.64

—

—

20.63

24.03

24.03

$

$

—

—

1.23

1.23

All stock options granted were fully vested as of December 31, 2017.  Total unrecognized compensation costs related to unvested stock options 
granted were $0 as of December 31, 2017.  No stock options were exercised during the years ended December 31, 2017, 2016 and 2015, 
respectively.

Restricted Stock Units (“RSUs”):

RSUs were awarded to employees in 2013 that vested in two installments, 50% on the grant date and 50% on the first anniversary of the grant 
date. These RSU awards provided for accelerated vesting upon change in control or death or disability. These employee RSUs settled and 
converted into Ambac shares upon the earlier of (a) the employee’s termination of employment (other than for cause) and (b) the second 
anniversary of the applicable vesting date. 

In 2015 and 2016, RSU awards were granted to the former Chief Executive Officer.  The 2015 award would vest in three equal installments 
on January 1, 2016, 2017 and 2018, with certain accelerated vesting features.  The 2016 award would vest in three equal installments on 
December 31, 2016, 2017 and 2018.  The former Chief Executive Officer departed the Company in 2016 and pursuant to the terms set forth 
in his settlement agreements and the RSU award agreements, (i) the service requirement for the entire 2015 award was met and the entire RSU 
award vested in 2016 and (ii) the service requirement for one-third of the 2016 RSU award was met and vested in 2016 with the remaining 
two-thirds of the 2016 RSU award forfeited.    

In 2016, RSU awards were granted to certain Executive Officers.  The awards vest in three equal installments on February 21, 2017, 2018 and 
2019 ("Time-Based RSUs").  The vesting of the Time-Based RSUs are expressly conditioned upon the respective Executive's continued service 
with Ambac through the applicable vesting date.

In 2017, RSU awards were granted to certain employees as consideration for a portion of their annual bonus.  These awards vest upon grant, 
but settlement, other than for employment tax withholdings, occurs in two equal installments on March 2, 2018 and 2019, or upon termination 
if earlier.

RSUs are awarded annually to directors that vest on the last day of April of the following year. These RSUs will not settle until the respective 
director’s termination from the board of directors or, if earlier, upon a change in control. All RSUs provide for accelerated vesting upon a 
change in control, death or disability or involuntary removal other than for cause (not including removal pursuant to a shareholder vote at a 
regularly scheduled annual meeting of shareholders). Upon termination (other than for cause), the RSUs shall vest as of the date of such 
termination in an amount equal to the number of then outstanding RSUs multiplied by a fraction, the numerator of which shall be the number 
of calendar days which have lapsed since the grant date and the denominator of which shall be the total number of calendar days of the original 
vesting period. 

As of December 31, 2017, 221,803 RSUs remained outstanding, of which (i) 68,654 units required future service as a condition to the delivery 
of the underlying shares of common stock and (ii) 153,149 units did not require future service and are deferred for future settlement.  As of 
December 31, 2016, 264,230 RSUs remained outstanding, of which (i) 102,794 units required future service as a condition to the delivery of 
the underlying shares of common stock, (ii) 103,486 units vested on December 31, 2016 but were not settled until January 3, 2017 and 
(ii) 57,950 units did not require future service and are deferred for future settlement. 

| Ambac Financial Group, Inc.   143   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

A summary of RSU activity for 2017 is as follows: 

Outstanding at beginning of period

Granted
Delivered or returned to plan (1)

Forfeited

Outstanding at end of period

Shares

Weighted Average
Grant Date
Fair Value

264,230

$

70,432

(112,859)

—

221,803

$

16.47

20.22

13.96

—

18.93

(1)  When restricted stock unit awards issued by Ambac become taxable compensation to employees, shares may be withheld to cover the employee’s withholding 
taxes.  For the year ended December 31, 2017, Ambac purchased 56,410 of shares from employees that settled restricted stock units to meet the required 
tax withholdings.

Ambac’s closing share price on the grant date was used to estimate the fair value of the service condition based RSU on the grant date.  The 
weighted average grant date fair value of RSUs granted during 2017, 2016 and 2015 was $20.22, $14.34 and $23.71, respectively.  As of 
December 31, 2017, there was $478 of total unrecognized compensation costs related to unvested RSUs granted. These costs are expected to 
be recognized over a weighted average period of 0.6 years. The fair value for RSUs vested and delivered during the year ended December 31, 
2017, 2016 and 2015 was $2,536, $2,965 and $864, respectively.

Performance Stock Awards ("PSUs"):

Performance awards granted vest in 3 years and actual awards will be based on performance at both Ambac and Ambac Assurance.  Actual 
awards can payout 0% to 200% of the number of units granted.  

Ambac performance will be evaluated relative to cumulative earnings before interest, taxes, depreciation and amortization over the vesting 
period (exclusive of Ambac Assurance and its subsidiaries' earnings), which is intended to reward participants on generating pre-tax income. 
Over the same period, Ambac Assurance performance will be evaluated according to changes in a ratio or value of Ambac Assurance's assets 
relative to its insurance and financial obligations, which is intended to reward participants for increases in the relative value of Ambac Assurance.  
Other than voluntary termination or involuntary termination for cause, and provided that a participant's employment with the Company is not 
terminated within the first year of the performance period (reduced to six months for the 2016 and 2017 grants to employees other than 
executive officers), the performance awards shall partially vest as of the date of such termination in the proportion of the number of calendar 
days which have lapsed since the grant date and the denominator of which shall be the total number of calendar days of the original vesting 
period.  Settlements of the 2015 and 2016 performance awards shall be within 60 days after the end of the performance period, including those 
with a partial vesting.  The 2017 performance awards shall be within 75 days after the end of the performance period, including those with a 
partial vesting.

In 2015, a performance award was granted to the former Chief Executive Officer.  This award will vest on February 12, 2018 upon the 
emergence of the Segregated Account from rehabilitation.

A summary of PSU activity for 2017 is as follows:

Outstanding at beginning of period

Granted (1)
Delivered (2)
Forfeited (1)
Performance adjustment (3)

Outstanding at end of period

Shares

Weighted Average
Grant Date
Fair Value

227,073

$

153,317

(38,464)

(26,378)

7,395

322,943

$

21.29

22.35

29.78

20.26

29.78

21.06

(1)  Represents performance share units at 100% of units granted for LTIP Awards.   

(2)  Reflects the number of performance shares attributable to the performance goals attained over the completed performance period and for which service 

conditions have been met.

(3)  Represents  the  increase  (decrease)  in  shares  issued  for  awards  granted  in  2014  based  upon  the  attainment  of  performance  metrics  at  the  end  of  the 

performance period. 

As of December 31, 2017 there was $3,523 of total unrecognized compensation costs related to the PSU portion of unvested performance 
awards, which are expected to be recognized over a weighted average period of 1.6 years. 

| Ambac Financial Group, Inc.   144   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

16. 

COMMITMENTS AND CONTINGENCIES 

Ambac is responsible for leases on the rental of office space. The executive office of Ambac is located in New York City under a lease agreement 
that was modified and extended in 2015 to allow Ambac to remain in the same office space through September 2019 and on one floor through 
the end of 2029, with an option to continue to occupy other currently leased floors through the end of 2029.  Rent payments under this lease 
made through September 2019 will result in the periodic reduction of junior surplus notes that were previously issued to the landlord, beginning 
in January 2016.  Ambac leases additional space for its data center, disaster recovery site and for its international location  under lease agreements 
that expire periodically through October 2020. An estimate of future net minimum lease payments in each of the next five years ending 
December 31, and the periods thereafter, is as follows: 

2018

2019

2020

2021

2022

Thereafter

Total

$

6,794

$

5,563

$

1,929

$

1,566

$

1,569

$

11,765

$

29,186

Ambac rent expense for the aforementioned leases amounted to $2,717,  $3,008 and $5,746 for the years ended December 31, 2017, 2016 and 
2015, respectively.  Beginning in 2016, rent expense is reduced by the reduction in junior surplus notes discussed above.

The Segregated Account and Wisconsin Rehabilitation Proceeding

On March 24, 2010, Ambac Assurance established a segregated account (the “Segregated Account”) and allocated to the Segregated Account 
certain financial guaranty insurance policies and other contingent liabilities, certain claims and other rights, and certain equity interests in 
subsidiaries. An insurance rehabilitation proceeding (the “Rehabilitation Proceeding”) was commenced with respect to the Segregated Account 
in the Wisconsin Circuit Court for Dane County (the “Rehabilitation Court”) on March 24, 2010 by the Commissioner of Insurance of the 
State of Wisconsin (the “Commissioner”) and the Rehabilitation Court entered an order of rehabilitation for the Segregated Account, appointing 
the Commissioner as Rehabilitator, and entered orders enjoining certain actions that could have an adverse effect on the financial condition 
of the Segregated Account.

Various third parties filed motions or objections in the Rehabilitation Court and/or moved to intervene in the Segregated Account Rehabilitation 
Proceeding.  On  January 24,  2011,  the  Rehabilitation  Court  issued  its  Decision  and  Final  Order  Confirming  the  Rehabilitator’s  Plan  of 
Rehabilitation, with Findings of Fact and Conclusions of Law (the “Confirmation Order”). Notices of appeal from the Confirmation Order 
were filed by various parties, including policyholders. These appeals challenged various provisions of the Segregated Account Rehabilitation 
Plan and actions the Rehabilitator or the Wisconsin Commissioner of Insurance had taken in formulating the Segregated Account Rehabilitation 
Plan. These appeals from the Confirmation Order were consolidated with earlier-filed appeals challenging, among other things, the issuance 
of injunctive relief and a settlement between Ambac Assurance and various financial institutions. On October 24, 2013, the Wisconsin Court 
of Appeals affirmed the Confirmation Order and the Rehabilitation Court’s rejection of the objections filed by various third parties before 
entry of the Confirmation Order. On November 22, 2013, petitions seeking discretionary review of this ruling by the Wisconsin Supreme Court 
were filed by various parties. The Rehabilitator responded by opposing further review by the Wisconsin Supreme Court.   On March 17, 2014, 
the Supreme Court of Wisconsin denied the petitions for review making the decision by the Wisconsin Court of Appeals final and controlling 
law.

On February 10, 2016, certain investors filed a motion in the Rehabilitation Court requesting an order directing the Rehabilitator to show 
cause why the Interim Payment Percentage as set forth in the Segregated Account Rehabilitation Plan, as amended, should not be substantially 
increased  and  distributions  promptly  made  to  all  holders.   A  hearing  on  the  motion  was  held  on  March  29,  2016.  On April  5,  2016,  the 
Rehabilitation Court entered an order denying the motion, granting the Rehabilitator’s motion to quash a related deposition notice, and requiring 
interested parties in the proceedings to obtain leave of court before seeking any discovery.

On July 15, 2016, the Rehabilitator filed a motion to confirm and declare the nature of the Segregated Account Rehabilitation Proceedings in 
order to avoid misunderstandings that may arise in litigation involving Ambac Assurance concerning certain military housing projects. Certain 
parties to these military housing litigations filed an opposition to the Rehabilitator’s motion on September 30, 2016. On October 11, 2016 the 
Rehabilitation Court held a hearing on the motion and on October 24, 2016, the Rehabilitation Court entered an order granting the Rehabilitator’s 
motion (the “October 24 Order”).  On November 7, 2016, the interested parties that had opposed the Rehabilitator’s motion filed a notice of 
appeal from the October 24 order, and filed their opening brief in support of this appeal on January 17, 2017.  The Rehabilitator filed a response 
brief in the Wisconsin Court of Appeals on February 15, 2017.  On November 21, 2016, the Rehabilitator filed a motion to quash a subpoena 
served on the Wisconsin Commissioner of Insurance by certain parties to the military housing litigations.  The Rehabilitation Court granted 
the Rehabilitator’s motion to quash on November 23, 2016.  The interested parties that had served the subpoena filed an opposition to the 
Rehabilitator’s motion to quash on November 23, 2016, and filed on November 28, 2016 a motion to reconsider the November 23 order, which 
the Rehabilitator opposed on December 6, 2016.  The Rehabilitation Court held a hearing on January 6, 2017 and entered an order on January 
20,  2017  denying  the  motion  to  reconsider  and  clarifying  procedures  for  discovery  relating  to  the  Segregated Account  Rehabilitation 
Proceedings. On December 14, 2017, the Wisconsin Court of Appeals, District IV, issued a decision affirming the October 24 Order.

On September 25, 2017, the Rehabilitator filed in the Rehabilitation Court a Motion to Further Amend The Plan of Rehabilitation Confirmed 
on January 24, 2011 To Facilitate An Exit from Rehabilitation.  The evidentiary Confirmation Hearing was held on January 4, 2018, and 
continued  on  January  22,  2017.  On  January  22,  2018,  the  Rehabilitation  Court  entered  an  order  granting  the  Rehabilitator’s  motion  and 

| Ambac Financial Group, Inc.   145   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

confirming the Second Amended Plan of Rehabilitation (the "Confirmation Order"), which became effective on February 12, 2018.  Pursuant 
to the Confirmation Order, the Rehabilitation Court also ruled that, contrary to allegations made by certain parties to certain military housing 
litigations (the "MHPI Projects"), the Rehabilitation Court did not previously enter any order that could form the predicate for a claim of 
“Ambac Default” and confirmed Section 6.13 of the Second Amended Plan of Rehabilitation which, among other things, provided that any 
such default is deemed not to have existed or to be cured.  

On January 25, 2018,the MHPI Projects submitted a letter to the Rehabilitation Court objecting to the Rehabilitator's interpretation  of Section 
6.8 of the Second Amended Plan of Rehabilitation and requesting briefing on the issue and a conference with the Rehabilitation Court. On 
February 7, 2018, pursuant to the request of the Rehabilitator, the Rehabilitation Court issued an order denying the request for briefing and a 
conference and overruled the objection set forth in the letter of January 25th.  On February 7, 2018, the Rehabilitator filed a motion with the 
Rehabilitation Court requesting injunctive relief against the MHPI Projects that would, among other things, enjoin the MHPI Projects from 
taking further actions or making further arguments, in any court or otherwise, in contravention of the Confirmation Order, the findings contained 
in the Confirmation Order or the provisions of the Second Amended Plan of Rehabilitation.  On the same day, the Rehabilitation Court issued 
an order granting the Rehabilitator's February 7th motion (the "February 7 Order").  On February 26, 2018, the MHPI Projects filed a Notice 
of Motion and Motion for Reconsideration as well as a Notice of Motion and Motion for Expedited Hearing in the Rehabilitation Court, 
requesting reconsideration of the February 7 Order on an expedited basis.  Briefing on the motions is expected to be completed by March 29, 
2018 with a hearing to follow on a date to be determined. The Company expects the MHPI Projects to appeal the Confirmation Order and one 
or both of the orders issued by the Rehabilitation Court on February 7, 2018.

Litigation Against Ambac

Ambac Assurance is defending several lawsuits in which borrowers have brought declaratory judgment actions claiming, among other things, 
that Ambac Assurance’s claims for specific performance related to the construction and development of housing at various military bases to 
replace or cash-fund a debt-service-reserve surety bond, as required under the applicable loan documents (see Litigation Filed By Ambac), 
are time-barred or are barred by the doctrine of laches, that Ambac lacks standing on the basis that there has been an “Ambac Default,” and 
that Ambac is not entitled to specific performance pursuant to the terms of the loan documents.  Specifically, Ambac Assurance is a defendant 
in the following actions:

•  Meade  Communities  LLC  v.  Ambac  Assurance  Corporation  (Circuit  Court,  Anne  Arundel  County,  Maryland,  Case  No.  C-02-
CV-15-003745).  Plaintiff filed this action on December 2, 2015.  Ambac Assurance’s answer was served on February 16, 2016. On April 
26, 2017, the court granted a motion by Meade to amend its complaint to add a new count that Ambac had allegedly "unreasonably 
withheld" consent to a proposed Out-Year Development plan submitted by Meade to Ambac for approval.  On April 28, 2017, Ambac 
Assurance filed a motion for summary judgment on all counts of the original Meade complaint.  On April 28, 2017, Meade filed a motion 
for partial summary judgment on two counts of the complaint and certain Ambac Assurance affirmative defenses. On June 2, 2017, the 
parties filed oppositions to the summary judgment motions.  The parties filed reply briefs in support of their motions on June 16, 2017.  
On July 14, 2017, the parties cross-moved for summary judgment on the additional count added to the amended complaint on April 26, 
2017. The court heard oral argument on all motions for summary judgment on September 1, 2017.  On October 20, 2017, the court granted 
Meade's motion for summary judgment that the statute of limitations had run on Ambac Assurance's counterclaim for specific performance 
and that this ruling was sufficient to fully resolve Meade's claims and Ambac's counterclaims concerning the debt service reserve surety 
bond. On November 27, 2017, Ambac Assurance filed a notice of appeal of the circuit court’s decision. On January 22, 2018, the court 
granted Meade's motion for summary judgment finding that Ambac Assurance lacked standing on the basis that there had been an "Ambac 
Default" by virtue of certain orders of the Rehabilitation Court. On January 26, 2018, Ambac Assurance filed a Motion to Alter or Amend 
Judgment with the Maryland Court arguing that the Rehabilitation Court's January 22 Confirmation Order constituted grounds for altering 
the judgment to award summary judgment on the "Ambac Default" issue for Ambac Assurance.  On February 7, 2018, the Rehabilitation 
Court entered a further order enjoining Meade from continuing to argue that an Ambac Default occurred by virtue of the Rehabilitation 
Court's prior orders and requiring Meade to file that order with the Maryland Court.  On February 8, 2018, Meade complied and filed 
the January 22nd and February 7th Rehabilitation Court orders with the Maryland court.  On February 12, 2018, the Maryland Court 
granted Ambac's motion to stay enforcement of the Court's January 22nd amended order concerning "Ambac Default" and granting Meade 
an extension until March 14, 2018 to oppose Ambac's Motion to Alter or Amend Judgment.

•  Monterey Bay Military Housing LLC and Monterey Bay Land LLC v. Ambac Assurance Corporation (Superior Court, Monterey County, 
California, Case No. 15CV000599).  Plaintiff filed this action on December 4, 2015.  Ambac Assurance filed an answer on January 19, 
2016. On March 30, 2017, Ambac Assurance filed a motion for summary judgment on all counts of the Monterey Bay complaint.  On 
March 30, 2017, Monterey Bay filed a motion for partial summary judgment on two counts of the complaint and certain Ambac Assurance 
affirmative defenses.  The parties filed their opposition briefs on June 2, 2017 and reply briefs on June 9, 2017. On June 19, 2017, the 
court issued a preliminary order that partially granted Monterey Bay's motion for summary judgment and ruled that the California statute 
of limitations had run on Ambac Assurance's claim for specific performance, subject to Ambac Assurance's defense of equitable tolling.  
The court also partially granted Ambac Assurance's motion for summary judgment on certain of Monterey Bay's declaratory judgment 
claims.  On June 23, 2017, Ambac Assurance withdrew its defense of equitable tolling.  The parties agreed that the court's summary 
judgment ruling on the statute of limitations was sufficient to end the case at the trial court level and submitted final orders to the court 
for approval.  The court signed the final orders on July 13, 2017. On September 14, 2017, Ambac Assurance filed a notice of appeal.

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AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

The Company believes that it has substantial defenses to the claims raised in these lawsuits and intends to defend itself vigorously; however, 
the Company is not able to predict the outcome of these actions.

Monterey  Bay  Military  Housing,  LLC,  et  al.  v. Ambac Assurance  Corporation,  et  al.  (United  States  District  Court,  Northern  District  of 
California, San Jose Division, Case No. 17-cv-04992-BLF, filed August 28, 2017).  Plaintiffs-the corporate developers of various military 
housing projects-filed an amended complaint on October 27, 2017 asserting claims for (i) violation of 18 U.S.C §§ 1962(c) and 1962(d) (civil 
Racketeer Influenced and Corrupt Organizations Act (“RICO”) and conspiracy to commit civil RICO), (ii) breach of fiduciary duty, (iii) aiding 
and abetting breach of fiduciary duty, (iv) fraudulent misrepresentation, (v) fraudulent concealment and (vi) conspiracy to commit fraud.  
Ambac Assurance and a former employee of Ambac Assurance are included in the named defendants.  The claims relate to bonds and debt 
certificates (insured by Ambac Assurance) that were issued to finance the renovation and construction of housing at certain military bases. 
 Plaintiffs allege that defendants secretly conspired to overcharge plaintiffs for the financing of the projects and directed the excess profits to 
themselves.  Plaintiffs allege defendants generated these excess profits by supposedly charging inflated interest rates, manipulating “shadow 
ratings,” charging unnecessary fees, rigging the Guaranteed Investment Contract (“GIC”) bidding process, and hiding evidence of their alleged 
wrongdoing.  Plaintiffs seek, among other things, compensatory damages, disgorgement of profits and fees, punitive damages, trebled damages 
and attorneys’ fees.  On September 21, 2017, Ambac Assurance filed a motion to transfer venue to the United States District Court for the 
Southern District of New York, which motion plaintiffs opposed on October 5, 2017.  The Court heard oral argument on November 30, 2017 
and requested additional briefing from both parties.  After the submission of the additional briefing, the Court denied Ambac’s motion to 
transfer on January 2, 2018.  Ambac and the other defendants filed motions to dismiss the amended complaint on November 13, 2017, which 
Plaintiffs opposed on December 15, 2017.  The motions are fully briefed and a hearing is scheduled on the motions for April 12, 2018. Ambac 
believes the lawsuit is without merit. 

Ambac Assurance’s estimates of projected losses for RMBS transactions consider, among other things, the RMBS transactions’ payment 
waterfall structure, including the application of interest and principal payments and recoveries, and depend in part on our interpretations of 
contracts and other bases of our legal rights.  From time to time, bond trustees and other transaction participants have employed different 
contractual interpretations. It is not possible to predict whether additional disputes will arise, nor the outcomes of any potential litigation.  It 
is possible that there could be unfavorable outcomes in this or other disputes or proceedings and that our interpretations may prove to be 
incorrect, which could lead to changes to our estimate of loss reserves.

Ambac Assurance has periodically received various regulatory inquiries and requests for information with respect to investigations and inquiries 
that such regulators are conducting. Ambac Assurance has complied with all such inquiries and requests for information.

Ambac is involved from time to time in various routine legal proceedings, including proceedings related to litigation with present or former 
employees. Although Ambac’s litigation with present or former employees is routine and incidental to the conduct of its business, such litigation 
can result in large monetary awards when a civil jury is allowed to determine compensatory and/or punitive damages for, among other things, 
termination of employment that is wrongful or in violation of implied contracts.

It is not reasonably possible to predict whether additional suits will be filed or whether additional inquiries or requests for information will 
be made, and it is also not possible to predict the outcome of litigation, inquiries or requests for information. It is possible that there could be 
unfavorable outcomes in these or other proceedings. Legal accruals for litigation against Ambac which are probable and reasonably estimable, 
and management's estimated range of loss for such matters, are not material to the operating results or financial position of the Company. For 
the litigation matters Ambac is defending that do not meet the “probable and reasonably estimable” accrual threshold and where no loss 
estimates have been provided above, management is unable to make a meaningful estimate of the amount or range of loss that could result 
from unfavorable outcomes. Under some circumstances, adverse results in any such proceedings could be material to our business, operations, 
financial position, profitability or cash flows. The Company believes that it has substantial defenses to the claims above and, to the extent that 
these actions proceed, the Company intends to defend itself vigorously; however, the Company is not able to predict the outcomes of these 
actions.

Litigation Filed or Joined by Ambac

In the ordinary course of their businesses, certain of Ambac’s subsidiaries assert claims in legal proceedings against third parties to recover 
losses already paid and/or mitigate future losses. The amounts recovered and/or losses avoided which may result from these proceedings is 
uncertain, although recoveries and/or losses avoided in any one or more of these proceedings during any quarter or fiscal year could be material 
to Ambac’s results of operations in that quarter or fiscal year.

Erste Europäische Pfandbriefund Kommunalkreditbank AG In Luxemburg and Ambac Assurance Corporation v. City of San Bernardino, 
California (United States Bankruptcy Court, Central District of California, Riverside Division, Docket No. 15-1185, filed on January 7, 2015).  
Plaintiffs  commenced  this  adversary  proceeding,  which  relates  to  the  Debtor’s  obligations  under  the  Public  Employees  Retirement Law, 
California Government Code Section 20000 et seq. (the “Retirement Law”), in connection with the City of San Bernardino’s bankruptcy 
proceeding.  In the complaint, plaintiffs seek a declaratory judgment that the Debtor is obligated to make equivalent payments to both the 
holders of certain pension obligation bonds (the “Bonds”), a portion of which are insured by Ambac, and the California Public Employees 
Retirement Systems (“CalPERS”) to fund pension and other retirement benefits.  It is the plaintiffs’ position that they are entitled to declaratory 
judgment because (i) when the City issue the Bonds, the City argued and a California court found, that the obligations under the Bonds were 

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AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

of the same legal character as the City’s obligations to CalPERS and (ii) the amounts owed to the bondholders are to CalPERS are merely 
separate portions of a single obligation owed by the Debtor under the Retirement Law. Plaintiffs therefore seek equivalent payment as to 
CalPERS, whether such payment takes for the form of current payments during the bankruptcy proceeding and thereafter, payments otherwise 
made in connection with the Retirement Law or any agreements entered into in accordance therewith, or distributions under a plan of adjustment. 
On March 13, 2015, the City filed a motion to dismiss the complaint, which plaintiffs opposed. On May 11, 2015, the court heard oral argument 
and granted the City’s motion to dismiss. On June 8, 2015, plaintiffs filed a notice of appeal of the court’s order granting the City’s motion to 
dismiss with the Bankruptcy Appellate Panel for the Ninth Circuit and filed their appellate brief on January 5, 2016. The parties have reached 
a settlement and pursuant to the settlement agreement dated March 28, 2016, the plaintiffs have agreed to dismiss the appeal with prejudice 
upon confirmation of the City’s plan of adjustment by the bankruptcy judge and the plan of adjustment becoming effective. The plan of 
adjustment was confirmed on February 7, 2017 and became effective on June 15, 2017.  Accordingly, the parties filed a stipulation agreeing 
to dismiss the appeal with prejudice with the Bankruptcy Appellate Panel on June 25, 2017. The bankruptcy appellate panel dismissed the 
appeal on July 13, 2017.

Puerto Rico:

Assured Guaranty Corp., Assured Guaranty Municipal Corp., and Ambac Assurance Corporation v. Alejandro Garcia Padilla, et al. (United 
States District Court, District of Puerto Rico No. 3:16-cv-01037, filed January 7, 2016). Ambac Assurance, along with co-plaintiffs Assured 
Guaranty Corp. and Assured Guaranty Municipal Corp., filed a complaint for declaratory and injunctive relief to protect its rights against the 
illegal clawback of certain revenue by the Commonwealth of Puerto Rico.  Defendants (including the Government Development Bank (GDB) 
President but solely in her capacity as a member of the Working Group For The Fiscal and Economic Restoration of Puerto Rico) filed a 
motion to dismiss for lack of subject matter jurisdiction on January 29, 2016. The GDB President, in her official capacity, moved to dismiss 
for failure to state a claim upon which relief can be granted on January 29, 2016. Plaintiffs filed their oppositions to the motions on February 
16, 2016 and Defendants filed replies on February 23, 2016. This case was administratively consolidated with a similar case before the same 
judge, Financial Guaranty Insurance Company v. Alejandro Garcia Padilla, et al. (United States District Court, District of Puerto Rico No. 
3:16- cv-01095). On October 4, 2016, the court denied the Defendants’ and GDB President’s motions to dismiss with respect to all claims 
asserted by Ambac Assurance and Assured. On October 14, 2016, Defendants filed a Notice of Automatic Stay, asserting that Plaintiffs’ claims 
have been rendered moot and further asserting that the case is automatically stayed under section 405 of the Puerto Rico Oversight, Management 
and Economic Stability Act (PROMESA). On October 28, 2016, Plaintiffs informed the court that neither party was currently challenging the 
stay, and expressly reserved their right to seek to lift the stay at any time. Plaintiffs also objected to Defendants’ assertion that the case should 
be dismissed as moot. PROMESA’s litigation stay expired on May 2, 2017. On May 3, 2017, a petition under Title III of PROMESA was filed 
on behalf of the Commonwealth of Puerto Rico.  On May 16, 2017, Defendants filed a statement requesting that the court take notice of the 
stay resulting from the Commonwealth’s Title III filing.  On May 17, 2017, the court issued an order staying this case until further order of 
the court.

Ambac Assurance Corporation v. Puerto Rico Highways and Transportation Authority (United States District Court, District of Puerto Rico, 
No. 16-cv-1893, filed May 10, 2016). Ambac Assurance filed a complaint against the Puerto Rico Highways and Transportation Authority 
(PRHTA) on May 10, 2016, alleging breach of fiduciary duty and breach of contract in connection with PRHTA’s extension of an existing toll 
road concession agreement. The complaint alleges that it was inappropriate for PRHTA to enter into the extension agreement in its current 
state of financial distress because PRHTA has no control over, and is unlikely to receive, the proceeds of the transaction. The complaint also 
seeks specific performance of PRHTA’s contractual duty to provide information requested by Ambac Assurance under documents related to 
PRHTA bonds insured by Ambac Assurance. Ambac Assurance filed related motions seeking the appointment of a provisional receiver for 
PRHTA and expedited discovery. In addition to those remedies, Ambac Assurance seeks an order of the court that would, among other things, 
compel PRHTA to allow Ambac Assurance to inspect PRHTA’s financial records on an ongoing basis and permanently enjoin PRHTA from 
committing further breaches of its fiduciary and contractual duties. On July 1, 2016, PRHTA filed an Emergency Notice of Stay, asserting that 
the case was automatically stayed under section 405 of PROMESA. Ambac Assurance filed a response on July 11, 2016, disagreeing that the 
PROMESA stay applies but electing not to contest the stay at such time and reserving the right to challenge it or to seek to lift the stay in the 
future. Ambac Assurance also asserted that PRHTA still is obligated to make available to Ambac Assurance certain information, notwithstanding 
the stay on litigation and provided a proposed order for the court to issue. PRHTA filed a reply on July 18, 2016, contesting Ambac Assurance’s 
characterization, and provided an alternative order for the court to issue. Ambac Assurance’s response was filed July 25, 2016. PRHTA also 
filed an Urgent Motion to Exempt PRHTA from Outstanding Filings in the case during the pendency of the stay, which was granted. On August 
23, 2016 the court issued an order staying the case. PROMESA’s litigation stay expired on May 2, 2017. The Commonwealth and Oversight 
Board have stated to Ambac Assurance that they believe this action is stayed due to the Commonwealth’s Title III filing.  Subsequent to that 
statement, on May 21, 2017, a petition under Title III of PROMESA was filed on behalf of PRHTA. On May 24, 2017, the court issued an 
order staying this case until further order of the court.

Lex Claims, LLC et al. v. Alejandro Garcia Padilla et al. (United States District Court, District of Puerto Rico, No. 16-2374, filed July 20, 
2016). On October 7, 2016, certain General Obligation bondholder Plaintiffs in an action to which Ambac Assurance was not then a party 
filed a motion for leave to amend their complaint and for partial relief from the PROMESA stay. Plaintiffs’ proposed second amended complaint 
added the Puerto Rico Sales Tax Financing Corporation (COFINA), COFINA’s executive director, and the trustee for the COFINA bonds as 
Defendants, and asserted numerous claims that challenge the legal validity of the COFINA structure and seek injunctive relief requiring the 
sales and use tax proceeds securing COFINA’s bonds to be transferred to the Puerto Rico Treasury. Plaintiffs contended that many of the claims 

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AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

challenging COFINA are not subject to PROMESA’s litigation stay provisions. On October 24, 2016, Defendants filed an opposition to the 
motion for leave to amend, arguing that the entire action is subject to the PROMESA stay. On October 26, 2016, Ambac Assurance filed a 
motion for leave to intervene and in support of the PROMESA stay. Ambac Assurance seeks to intervene principally to argue that the claims 
challenging COFINA are stayed by PROMESA, but also reserves the right to move to dismiss or otherwise defend against those claims should 
the court determine they are not stayed. On November 4, 2016, the Court granted Plaintiffs’ motion for leave to amend. Plaintiffs filed their 
second amended complaint that same day. On November 7, 2016, government Defendants sought to stay the case. On February 17, 2017, the 
court granted the motions to intervene of Ambac Assurance and certain other parties.  The court also denied Defendants’ motion to stay, 
rejecting the arguments in support of the stay filed by Defendants and the intervenors, including Ambac Assurance. On March 20, 2017, Ambac 
Assurance filed in the district court an answer to the second amended complaint and a motion to dismiss Plaintiffs’ claim against COFINA, 
to strike certain portions of the second amended complaint, or, in the alternative, to certify the question of COFINA’s constitutionality to the 
Supreme Court of Puerto Rico. Certain other intervenors also filed answers and various motions in the district court. On April 4, 2017, the 
U.S. Court of Appeals for the First Circuit reversed the district court’s decision concerning the application of the PROMESA stay, which had 
the effect of reinstating the stay. PROMESA’s litigation stay expired on May 2, 2017.  On May 3, 2017, a petition under Title III of PROMESA 
was filed on behalf of the Commonwealth of Puerto Rico.  On May 16, 2017, Defendants filed a statement requesting that the court take notice 
of the stay resulting from the Commonwealth’s Title III filing.  On May 17, 2017, the court issued an order staying this case until further order 
of the court. 

Ambac Assurance Corporation v. Puerto Rico, et al. (United States District Court, District of Puerto Rico, No. 17-1567, filed May 2, 2017). 
On May 2, 2017, Ambac Assurance filed a complaint seeking a declaration that the Commonwealth’s Fiscal and Economic Growth Plan (the 
FEGP) and a recently enacted statute called the “Fiscal Plan Compliance Law” are unconstitutional and unlawful because they violate the 
Contracts, Takings, and Due Process Clauses of the U.S. Constitution, are preempted by PROMESA, and are unlawful transfers of property 
from COFINA to the Commonwealth in violation of PROMESA. The complaint further seeks an injunction against the filing of any Title III 
petitions, an injunction against the enactment or enforcement of any future legislation, rules, budgets, or restructuring plans premised on the 
FEGP, and a declaration that the Commonwealth is liable for any funds unlawfully transferred to it from COFINA. The complaint also seeks 
a declaration that the FEGP and Fiscal Plan Compliance Law violate covenants made by the Commonwealth and COFINA in the COFINA 
Resolution, which constitute Events of Default under the COFINA Resolution. On May 3, 2017, a petition under Title III of PROMESA was 
filed on behalf of the Commonwealth of Puerto Rico, and on May 5, 2017, a petition under Title III of PROMESA was filed on behalf of 
COFINA.  On May 15, 2017, the Oversight Board filed a statement requesting that the court take notice of the stays resulting from these Title 
III filings.  On May 17, 2017, the court issued an order staying this case until further order of the court.

Ambac  Assurance Corporation v. Puerto Rico, et al. (United States District Court, District of Puerto Rico, No. 17-1568, filed May 2, 2017). 
On May 2, 2017, Ambac Assurance filed a complaint alleging that various moratorium laws and executive orders enacted by the Commonwealth 
to claw back funds from the PRIFA, PRHTA, and PRCCDA bonds violate the Contracts, Takings, and Due Process Clauses of the U.S. 
Constitution, are preempted by PROMESA, and unlawfully transfer PRHTA, PRCCDA, and PRIFA property to the Commonwealth. The 
complaint further seeks a declaration that the Commonwealth is liable for any funds unlawfully transferred to it from COFINA, an injunction 
against enforcement of the moratorium laws and executive orders, an injunction against the filing of any Title III petitions, and an injunction 
against the enactment or enforcement of any future legislation, rules, budgets, or restructuring plans premised on the FEGP.  On May 3, 2017, 
a petition under Title III of PROMESA was filed on behalf of the Commonwealth of Puerto Rico.  On May 15, 2017, the Oversight Board 
filed a statement requesting that the court take notice of the stay resulting from the Commonwealth’s Title III filing.  On May 17, 2017, the 
court issued an order staying this case until further order of the court.

Ambac Assurance Corporation v. U.S. Department of Treasury et al. (United States District Court, District of Columbia, No. 17-809, filed 
May 2, 2017). On May 2, 2017, Ambac Assurance filed a complaint against the U.S. Department of Treasury and Steven Mnuchin, in his 
official capacity as Secretary of the Treasury, alleging that Puerto Rico’s ongoing diversion of rum taxes from PRIFA violates the Contracts, 
Takings, and Due Process Clauses of the U.S. Constitution, and seeking an equitable lien on all rum taxes possessed by the U.S. Treasury, and 
an injunction preventing their transfer to the Commonwealth, in order to prevent further dissipation of those funds by the Commonwealth.  
On May 24, 2017, the Oversight Board filed a statement requesting that the court take notice of the stay resulting from the Commonwealth’s 
Title III filing.  On May 25, 2017, the court issued an order staying this case pending the final disposition of the Title III proceedings.

Ambac Assurance Corporation v. Bank of New York Mellon (United States District Court, Southern District of New York.  No. 1:17-cv-03804, 
filed May 2, 2017). On May 2, 2017, Ambac Assurance filed a complaint in New York State Supreme Court, New York County, against the 
trustee for the COFINA bonds, Bank of New York Mellon (BNY), alleging breach of fiduciary, contractual, and other duties for failing to 
adequately and appropriately protect the holders of certain Ambac Assurance-insured senior COFINA bonds. The complaint seeks money 
damages; a declaration that BONY breached its fiduciary, contractual, and other duties; a declaration compelling BNY to recognize an event 
of default under the COFINA Resolution and accelerate the COFINA debt; an injunction to prevent BNY from making payments to holders 
of subordinate COFINA bonds; and forced replacement of BNY as trustee.  On May 19, 2017, BNY filed a notice of removal of this action 
from New York state court to the United States District Court for the Southern District of New York.  On May 30, 2017, the United States 
District Court for the District of Puerto Rico entered an order in an adversary proceeding brought by BNY (No. 1:17-ap-00133) staying this 
litigation pending further order of the court.

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AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

Bank of New York Mellon v. COFINA, et al. (United States District Court, District of Puerto Rico, No. 1:17-ap-00133, filed May 16, 2017).  
On May 16, 2017, BNY filed an adversary complaint in COFINA’s Title III case for an order to show cause why the court should not:  (i) 
grant an interpleader of funds that BNY is holding for future interest payments to holders of COFINA bonds; (ii) stay pending and future 
litigation against BNY related to its role as trustee for COFINA bonds, including the action by Ambac Assurance against BNY; and (iii) 
discharge BNY from any liability in association with the interpleaded funds.  BNY filed this interpleader action against COFINA and certain 
creditors of COFINA, including Ambac Assurance, that have made competing claims of entitlement to funds held by BNY in order to determine 
the parties’ respective entitlements to the funds.  On May 30, 2017, the court granted BNY’s motion to interplead, and on June 6, 2017, the 
court set a schedule for discovery and briefing.  Discovery and briefing are ongoing; summary judgment briefing is scheduled to conclude on 
December  1,  2017.  An  ad  hoc  group  of  general  obligation  bondholders  and  the  Official  Committee  of  Unsecured  Creditors  for  the 
Commonwealth of Puerto Rico (the Creditors’ Committee) each moved to intervene (respectively) on May 23 and July 31, 2017; these motions 
to intervene were denied (respectively) on July 6 and August 1, 2017. On August 29, 2017, the Creditors’ Committee moved to intervene 
again, this time in its capacity as Commonwealth Agent.  Multiple parties objected to the motion, including Ambac Assurance.  Oral argument 
was heard in front of Magistrate Judge Dein on September 15, 2017.  On September 27, 2017, Judge Dein issued an opinion and order denying 
the motion to intervene but holding that the Creditors’ Committee may renew its request to intervene as a statutory committee, rather than as 
Commonwealth Agent.  Fact stipulations among the parties were entered and so-ordered on September 26 and October 12, 2017, obviating 
the need for certain depositions.  On November 6, 2017, a number of parties, including Ambac Assurance, filed motions for summary judgment; 
Ambac Assurance argued that the Commonwealth’s and COFINA’s pre-petition actions constituted defaults under the COFINA bond resolution, 
and these defaults have ripened into events of default resulting in the senior COFINA bondholders’ absolute priority to the funds in BNY’s 
possession.  Briefing on the summary judgment motions was completed on January 5, 2018. 

Peaje Investments LLC v. Puerto Rico Highways and Transportation Authority, et al. (United States District Court, District of Puerto Rico, 
No. 1:17-ap-00151, filed May 31, 2017).  On June 15, 2017, Ambac Assurance moved to intervene in an adversary proceeding brought by 
Peaje Investments (Peaje), a holder of 1968 Bonds issued by PRHTA, against PRHTA.  On May 31, 2017, Peaje filed a complaint seeking 
relief with respect to its ownership of the 1968 Bonds, including a declaration that the toll road revenues pledged to the 1968 Bonds are “special 
revenues” under Section 922 of the Bankruptcy Code, an injunction preventing the diversion of toll revenues to the Commonwealth and 
ordering the application of the toll revenues to the 1968 Bonds, and various declarations and injunctions related thereto.  Peaje also filed a 
motion for a temporary restraining order and preliminary injunction on the same day, seeking to enjoin PRHTA from diverting the toll revenues 
to the Commonwealth.  A hearing on the motion for a temporary restraining order was held on June 5, 2017, at which time Peaje withdrew 
the motion for a temporary restraining order.  In its motion to intervene, Ambac Assurance argued that issues in this case will have a significant 
impact on Ambac’s own interests with respect to PRHTA bonds.  On July 21, 2017, the court denied Ambac Assurance's motion to intervene. 
On September 8, 2017, the court denied Peaje’s motion for a preliminary injunction, finding that Peaje had not demonstrated either (i) a 
likelihood of success on the merits of its underlying claim that the 1968 bonds are secured by a statutory lien, or (ii) that it would be irreparably 
harmed in the absence of a preliminary injunction.  Peaje has appealed this denial of the preliminary injunction to the U.S. Court of Appeals 
for the First Circuit; the First Circuit has not yet ruled on this appeal. On October 10, 2017, Peaje filed an amended complaint; Defendants 
filed answers to the amended complaint on November 17, 2017.

Ambac Assurance Corporation v. Puerto Rico, et al. (United States District Court, District of Puerto Rico, No. 1:17-ap-00159, filed June 8, 
2017).  On June 8, 2017, Ambac Assurance filed an adversary complaint in the Commonwealth’s Title III case against the Commonwealth, 
PRHTA, the Oversight Board, AAFAF, and other Commonwealth government officers.  The complaint seeks declarations that (i) various 
moratorium laws ("Moratorium Legislation") enacted by the Commonwealth and executive orders ("Moratorium Orders")  issued by the 
Governor to claw back funds from the PRIFA, PRHTA, and PRCCDA bonds and (ii) the FEGP and Fiscal Plan Compliance Act violate the 
Contracts, Takings, and Due Process Clauses of the U.S. Constitution, are preempted by PROMESA, and unlawfully transfer PRHTA, PRCCDA, 
and PRIFA property to the Commonwealth.  The complaint further seeks a declaration that revenues pledged to the PRHTA bonds are “special 
revenues” under Sections 922 and 928 of the Bankruptcy Code, and an injunction compelling Defendants to remit the pledged special revenues 
to PRHTA for payment of the PRHTA bonds.  On July 7, 2017, Ambac Assurance filed an amended complaint that added an additional claim 
for relief:  a declaration that the funds held in the PRHTA reserve accounts are property of the PRHTA bondholders.  On August 3, 2017, the 
court entered an order, to which all parties stipulated, providing that BNYM, as fiscal agent for PRHTA bondholders, shall continue to hold 
the funds in the reserve accounts established under PRHTA’s governing bond documents until further order of the court.  On October 27, 2017, 
the court ordered that the Creditors’ Committee is entitled to “limited intervention,” in the proceeding.  On July 28, 2017, Defendants moved 
to dismiss Ambac Assurance’s complaint; briefing on the motion to dismiss concluded on October 31, 2017, and oral argument on the motion 
was held on November 21, 2017.  On February 27, 2018, the court granted Defendants’ motion to dismiss. As to certain of the claims, the 
court found that it lacks subject matter jurisdiction (i) to the extent the claims seek to invalidate the certification of the FEGP and prohibit 
certain actions under PROMESA due to alleged non-compliance with PROMESA requirements that are predicates to certification of the FEGP, 
or (ii) to the extent Ambac Assurance sought a determination of its lien rights over the PRHTA reserve accounts.  As to other claims, the court 
found that Ambac Assurance had failed to state a claim upon which the court could grant relief, including that (i) as to constitutional issues, 
Ambac Assurance had failed to plead facts sufficient to allow the court to draw a reasonable inference that the Moratorium Legislation, 
Moratorium Orders, and Fiscal Plan Compliance Act were “unreasonable or unnecessary to effectuate an important government purpose” and 
had failed to allege plausibly that the FEGP is an exercise of Commonwealth legislative power, (ii) Ambac Assurance had failed to plead facts 
sufficient to show that the Moratorium Legislation and Moratorium Orders prohibited the payment of principal and interest or purported to 
bind creditors to any reduction of the outstanding obligations and therefore would have been preempted by PROMESA under PROMESA 
Section 303(1), and Ambac Assurance failed to plead plausible, ripe claims that the Moratorium Orders are unlawful under PROMESA section 

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Notes to Consolidated Financial Statements
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303(3), (iii) the automatic stay is currently in effect and renders unavailable any cause of action pursuant to Section 407 of PROMESA, 
including claims by PRHTA bondholders that PRHTA should be compensated for any pledged special revenues transferred away from it in 
violation of applicable law, (iv) the court is not required or empowered under PROMESA or the Bankruptcy Code to order the payment of 
pledged special revenues to the PRHTA bondholders, and (v) Ambac Assurance had failed to plead facts sufficient to show that the PRHTA 
reserve accounts are the property of the bondholders.  Finally, the court held that PROMESA section 305 prevented it from ordering any relief 
on Ambac’s claim that the PRHTA reserve accounts are held in trust for bondholders.

Official Committee of Unsecured Creditors v. Whyte (United States District Court, District of Puerto Rico, No. 1:17-ap-00257, filed September 
8, 2017).  On August 10, 2017, the court approved a stipulation between the Oversight Board, the Commonwealth, COFINA, and certain 
creditor parties, including Ambac Assurance, to resolve the Commonwealth-COFINA dispute regarding entitlement to sales and use taxes.  
The  stipulation  contemplates  separate  agents  for  each  of  COFINA  and  the  Commonwealth,  which  agents  will  litigate  the  dispute,  while 
preserving the ability of interested parties, including Ambac Assurance, to participate in the litigation.  The court order names Ms. Bettina 
Whyte as the agent for COFINA, and names the Creditors’ Committee as the agent for the Commonwealth.  On September 8, 2017, pursuant 
to a stipulation and scheduling order entered by the court, the Creditors’ Committee, as Commonwealth Agent, filed an adversary proceeding 
against Bettina Whyte, as COFINA Agent.  The thirteen-count complaint for declaratory relief alleges (a) that COFINA’s enabling legislation 
did not, and could not, transfer present ownership of the future Sales and Use Tax revenues to COFINA, (b)  that this purported transfer is 
governed by Article 9 of the Uniform Commercial Code and is not enforceable, was never perfected, and is avoidable and (c) that the COFINA 
structure is unconstitutional because the COFINA enabling legislation was designed to evade the constitutional debt limit, the constitutional 
priority of payment granted to Puerto Rico’s public debtholders, and the balanced budget provision.  The Creditors’ Committee filed a revised 
complaint on October 25, 2017, making technical corrections to the original complaint; the COFINA Agent filed an answer to this amended 
complaint  on  October  30,  2017.    On  November  6,  2017, Ambac Assurance  filed  a  notice  of  intervention,  together  with  an  answer  and 
counterclaims; other interested parties named in the stipulation governing the Commonwealth-COFINA dispute similarly filed answers and 
counterclaims.  On November 13, 2017, Ambac Assurance and certain other interested parties filed motions seeking to enforce the stipulated 
scope of the Commonwealth-COFINA dispute.  Ambac Assurance moved to strike the Commonwealth Agent’s fourth through thirteenth causes 
of action as beyond the stipulated scope of the dispute, which is narrowly focused on whether the Pledged Sales Taxes are the property of 
COFINA.  On December 21, 2017, the District Court dismissed all but the first and second causes of action in the Commonwealth Agent’s 
complaint as outside the scope of the Commonwealth-COFINA dispute, ruling that the stipulation governing such dispute contemplates a 
narrow focus on the ownership of the Pledged Sales Taxes.  On January 4, 2018, the Commonwealth Agent filed a motion to clarify the District 
Court’s December 21 scope order, seeking reconsideration of the dismissal of the Commonwealth’s Agent’s constitutional claims or leave to 
amend its complaint such that its constitutional claims might fall within the permitted scope.  Ambac Assurance objected to this motion on 
January  8,  2018.    On  January  10,  2018,  the  District  Court  denied  the  Commonwealth Agent’s  motion  to  reconsider,  but  permitted  the 
Commonwealth Agent to move to amend its complaint in a manner consistent with the December 21 scope order.  The Commonwealth Agent 
moved to file an amended complaint on January 11, 2018, which motion Ambac Assurance opposed on January 12, 2018; the District Court 
granted the Commonwealth Agent’s motion on January 13, 2018, and the Commonwealth Agent filed its amended complaint on January 16, 
2018; the COFINA Agent, Ambac Assurance, and other parties filed answers and counterclaims to the amended complaint on January 30, 
2018.  The Commonwealth and other parties filed answers to these counterclaims on February 13 and 14, 2018. Motions for summary judgment 
were filed on February 21, 2018, with a hearing on those motions scheduled for April 10, 2018.

In re Financial Oversight and Management Board for Puerto Rico as representative of Puerto Rico Electric Power Authority (United States 
District Court, District of Puerto Rico, No. 1:17-bk-04780, filed July 2, 2017).  On January 31, 2018, the Oversight Board filed an urgent 
motion for approval of a post-petition revolving loan from the Commonwealth to PREPA in an initial amount of $550 million, up to $1.3 
billion (which figure later was lowered to $1.0 billion in amended filings on February 12, 2018).  On February 2, 2018, Ambac Assurance 
filed an objection to the urgent motion.  A hearing on the urgent motion was held on February 15, 2018, at the conclusion of which the Court 
ruled that the Oversight Board had not established the need for or the legality of the requested $1.0 billion facility, but held the motion in 
abeyance without prejudice to amendment.  On February 16, 2018, the Oversight Board filed a revised request for a $300 million loan; on 
February 19, 2018, the Court entered an order approving the $300 million loan from the Commonwealth to PREPA.

Student Loans Exposure:

CFPB  v.  Nat’l  Collegiate  Master  Student  Loan Trust  (United  States  District  Court,  District  of  Delaware,  Case  No.  1:17-cv-01323,  filed 
September 18, 2017). The Consumer Financial Protection Bureau (“CFPB”) filed a complaint against fifteen National Collegiate Student Loan 
Trusts, regarding alleged improprieties and deficiencies in servicing practices.   Simultaneous with the filing of its complaint, CFPB also filed 
a motion for entry of a proposed consent judgment that would grant monetary damages and injunctive relief against the Trusts. Ambac guaranteed 
certain securities issued by three of the Trusts and indirectly insures six other Trusts.  Ambac filed a motion to intervene in the action on 
September 20, 2017. On November 1, 2017, CFPB and the entities purporting to act on behalf of the Trusts filed briefs in response to Ambac’s 
motion to intervene stating that they do not oppose Ambac’s motion.  Ambac filed a reply brief in further support of its motion to intervene 
on November 20, 2017.  Ambac’s motion remains pending.

Nat’l Collegiate Master Student Loan Trust v. Pa. Higher Education Assistance Agency (PHEAA) (Delaware Court of Chancery, C.A. No. 
12111-VCS, filed March 21, 2016).  Plaintiffs purporting to act on behalf of fifteen National Collegiate Student Loan Trusts filed a lawsuit 
against PHEAA, a servicer of loans in the Trusts, alleging improprieties and deficiencies in servicing practices and seeking an order compelling 
PHEAA to submit to an emergency audit.  PHEAA submitted papers contesting the validity of certain transfers to Plaintiffs of beneficial 

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AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

ownership  interests  in  the Trusts.   In  addition,  the  Owner Trustee  of  the Trusts, Wilmington Trust  Company, WTC,  citing  irreconcilable 
differences with Plaintiffs, has resigned from its role as Owner Trustee and moved for appointment of a successor Owner Trustee.  On October 
9, 2017, the court directed the parties to meet and confer to develop a process for selecting an interim Owner Trustee.  Ambac guaranteed 
certain securities issued by three of the Trusts and indirectly insures certain securities in six other Trusts.  Ambac filed a motion to intervene 
in the action on October 23, 2017, for the limited purpose of being heard regarding the appointment of a successor Owner Trustee and regarding 
WTC’s contractual commitment and obligation to remain in that role until such appointment is made. Plaintiffs opposed Ambac’s motion to 
intervene on October 27, 2017. On October 30, 2017, the court denied without prejudice a stipulation filed by Plaintiffs and WTC purporting 
to address the Owner Trustee issue, and instructed that all interested parties be given notice and an opportunity to participate in discussions 
to formulate a process for selecting a successor Owner Trustee.  Ambac filed a reply brief in further support of its motion to intervene on 
November 3, 2017.  On November 7, 2017, the court ruled in Plaintiffs’ favor and confirmed the validity of the ownership transfers that 
PHEAA had disputed.  On January 12, 2018, Plaintiffs filed a motion for injunctive or declaratory relief requiring WTC, as Owner Trustee, 
and GSS Data Services, Inc., as Administrator, to resume processing for payment bills submitted by lawyers purporting to act on the Trusts’ 
behalf.  Oppositions to Plaintiffs’ motion are due on March 1, 2018. Negotiations regarding the selection of a new or interim Owner Trustee 
are ongoing.

Military Housing:

Ambac Assurance has filed various lawsuits seeking specific performance of obligations of borrowers on loans related to the construction and 
development of housing at various military bases to replace or cash-fund a debt-service-reserve surety bond provided by Ambac Assurance, 
as required under the applicable loan documents.   Defendants have asserted, among other things, that Ambac Assurance's claims are barred 
by the doctrine of laches, that Ambac Assurance lacks standing on the basis that there has been an “Ambac Default” or "Credit Enhancer 
Default" and that Ambac Assurance is not entitled to specific performance pursuant to the terms of the loan documents.  Specifically, Ambac 
Assurance has instituted the following actions:

•  Ambac Assurance Corporation v. Riley Communities, LLC (District Court, Shawnee County Kansas, No. 2016-CV-00026).  Ambac 
Assurance filed this action on January 8, 2016.  On February 2, 2016, defendant served its answer. On September 29, 2017, Ambac 
Assurance filed a motion for summary judgment on all counts of the Complaint and most of Riley's affirmative defenses.  On September 
29, 2017, Riley filed a motion for partial summary judgment on two of its affirmative defenses, including statute of limitations and "Credit 
Enhancer Default" by virtue of certain orders of the Rehabilitation Court. The parties filed their oppositions to the summary judgment 
motions on October 27 and replies November 10, 2017.  Due to the Rehabilitation Court’s January 22 Order, on January 24, 2018,  Ambac 
Assurance filed a Notice of Events Subsequent and Supplemental Brief in support of its Motion for Summary Judgment arguing that the 
Rehabilitation Court's January 22 order constituted further grounds for entering summary judgment for Ambac Assurance on the "Credit 
Enhancer Default" argument.

•  Ambac Assurance Corporation v. Fort Leavenworth Frontier Heritage Communities, II, LLC (U.S. District Court, District of Kansas, 
Index No. 15-CV-9596).  Ambac Assurance filed this action on November 19, 2015.  On January 4, 2016, defendant moved to dismiss 
for failure to join an indispensable party, which Ambac Assurance opposed on January 25, 2016. On June 29, 2016, the court denied 
defendant’s motion to dismiss and granted Ambac Assurance leave to file an amended complaint, which was filed on July 13, 2016. On 
August 1, 2016, Defendant filed a motion to dismiss the amended complaint for lack of subject matter jurisdiction. Ambac Assurance 
opposed the motion. On March 17, 2017, the court granted Fort Leavenworth's motion to dismiss for lack of subject matter jurisdiction.  
On March 28, 2017, Ambac re-filed the case in state court in Shawnee County, Kansas.  The re-filed case is styled Ambac Assurance 
Corporation v. Fort Leavenworth Frontier Heritage Communities II, LLC (District Court, Shawnee County, Kansas, No. 2017-cv-000216).

•  Ambac Assurance Corporation v. Carlisle/ Picatinny Family Housing Limited Partnership (Court of Common Pleas, Cumberland County, 
Pennsylvania, No. 2015-6348).  Ambac Assurance filed a summons on December 15, 2015 and a complaint on January 11, 2016. On 
February 1, 2016, defendant served its answer.

•  Ambac  Assurance  Corporation  v.  Fort  Lee  Commonwealth  Communities,  LLC  (Circuit  Court,  Roanoke  City,  Virginia,  No. 

CL16000072-00).  Ambac Assurance filed this action on January 7, 2016. Defendant served its answer on February 9, 2016.

•  Ambac Assurance Corporation v. Fort Bliss/White Sands Missile Range Housing LP (District Court, El Paso County, Texas, Cause No. 
2016DCV0094).  Ambac Assurance filed this action on January 8, 2016. Defendant served its answer on February 11, 2016. Defendant 
filed a motion for summary judgment on November 16, 2017 on two of its affirmative defenses, including statute of limitations and 
"Credit Enhancer Default" by virtue of certain orders of the Rehabilitation Court.  Ambac Assurance filed a consolidated (i) opposition 
to Fort Bliss/White Sands’ motion for summary judgment and (ii) counter-motion for partial summary judgment on December 13, 2017. 
Defendant filed its opposition on January 22, 2018.  Ambac Assurance filed its reply brief on January 30, 2018 arguing, among other 
things, that the Rehabilitation Court’s January 22 Order constituted further grounds for entering summary judgment for Ambac Assurance 
on the "Credit Enhancer Default" argument.   Oral argument on the summary judgment motions has been scheduled for April 27, 2018.  
On February 7, 2018, the Rehabilitation Court entered a further order enjoining Bliss (among others) from continuing to argue that an 
Ambac Default occurred by virtue of the Rehabilitation Court's prior orders and requiring Bliss to file that order with the Texas Court.  
On February 8, 2018, Bliss filed the Rehabilitation Court's January 22 and February 7 orders with the Texas court.

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AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

RMBS Litigation:

In connection with Ambac Assurance’s efforts to seek redress for breaches of representations and warranties and fraud related to the information 
provided by both the underwriters and the sponsors of various transactions and for failure to comply with the obligation by the sponsors to 
repurchase ineligible loans, Ambac Assurance has filed various lawsuits:

•  Ambac Assurance Corporation and The Segregated Account of Ambac Assurance Corporation v. First Franklin Financial Corporation, 
Bank of America, N.A., Merrill Lynch, Pierce, Fenner & Smith Inc., Merrill Lynch Mortgage Lending, Inc., and Merrill Lynch Mortgage 
Investors, Inc. (Supreme Court of the State of New York, County of New York, Case No. 651217/2012, filed April 16, 2012). Ambac 
Assurance alleges breach of contract, fraudulent inducement, indemnification, reimbursement and requested the repurchase of loans that 
breach representations and warranties as required under the contracts, as well as damages. Defendants filed a motion to dismiss on July 13, 
2012, which Ambac opposed on September 21, 2012. Oral argument was held on May 6, 2013. On July 18, 2013 the court dismissed 
Ambac Assurance’s claims for indemnification and limited Ambac Assurance’s claim for breach of loan-level warranties to the repurchase 
protocol, but did not dismiss Ambac Assurance’s other contractual claims or fraudulent inducement claim. On August 21, 2013, defendants 
filed a notice of appeal, and on August 30, 2013, Ambac Assurance filed a notice of cross-appeal. On April 22, 2014, the parties filed a 
stipulation withdrawing defendants’ appeal and Ambac Assurance’s cross-appeal of the court’s July 18, 2013 decision.  Discovery is 
ongoing.

•  Ambac  Assurance  Corporation  and  The  Segregated  Account  of  Ambac  Assurance  Corporation  v.  Countrywide  Securities  Corp., 
Countrywide Financial Corp. (a.k.a. Bank of America Home Loans) and Bank of America Corp. (Supreme Court of the State of New 
York, County of New York, Case No. 651612/2010, filed on September 28, 2010). Ambac Assurance filed an Amended Complaint on 
September 8, 2011. Ambac Assurance alleged breach of contract, fraudulent inducement, indemnification and reimbursement, and breach 
of representations and warranties, requested the repurchase of loans that breach representations and warranties as required under the 
contracts, as well as damages, and asserted a successor liability claim against Bank of America. On May 28, 2013, Ambac Assurance 
filed a Second Amended Complaint adding an alter ego claim against Bank of America alleging that, because Bank of America and 
Countrywide are alter egos of one another, Bank of America is responsible for Countrywide’s liabilities to Ambac. The defendants served 
their answers on July 31, 2013. Fact and expert discovery has ended. On May 1, 2015, Ambac Assurance filed motions for partial summary 
judgment, which defendants opposed. Defendants also each filed motions for summary judgment, which Ambac Assurance opposed. The 
court heard oral argument on July 15, 2015. On October 27, 2015, the court issued a decision dated October 22, 2015 granting in part 
and denying in part the parties’ respective summary judgment motions regarding Ambac Assurance’s claims against Countrywide (primary-
liability claims), and issued a second decision granting Ambac Assurance’s partial motion for summary judgment and denying Bank of 
America’s motion for summary judgment regarding Ambac Assurance’s secondary-liability claims against Bank of America. Ambac 
Assurance and Countrywide filed notices of appeal of the October 22, 2015 decision relating to primary liability and Bank of America 
filed a notice of appeal of the October 27, 2015 decision relating to its secondary-liability to the New York Appellate Division, First 
Department.   On May 16, 2017, the First Department issued rulings in both appeals, reversing a number of rulings that the trial court 
had made and affirming other rulings.  On June 15, 2017, Ambac Assurance filed a motion with the First Department for leave to appeal 
certain rulings in the May 16, 2017 decision to the Court of Appeals, which Countrywide opposed. On July 25, 2017 the First Department 
granted Ambac Assurance’s motion. The briefing for the appeal has been completed and oral argument is expected in 2018. 

•  Ambac Assurance Corporation and The Segregated Account of Ambac Assurance Corporation v. Nomura Credit & Capital, Inc. and 
Nomura Holding America Inc. (Supreme Court of the State of New York, County of New York, Case No. 651359/2013, filed on April 
15, 2013). Ambac Assurance alleges claims for material breach of contract and for the repurchase of loans that breach representations 
and warranties under the contracts, as well as damages. Ambac Assurance has also asserted alter ego claims against Nomura Holding 
America, Inc. Defendants filed a motion to dismiss on July 12, 2013, which Ambac Assurance opposed. The court held oral argument 
on November 13, 2013. On September 22, 2014, plaintiffs filed an amended complaint alleging claims for fraudulent inducement, material 
breach of contract and for the repurchase of loans that breach representations and warranties under the contracts, as well as damages. On 
October 31, 2014 defendants filed a motion to strike the amended complaint. Ambac Assurance opposed that motion and at the court’s 
recommendation also filed a cross motion for leave to amend the complaint on November 14, 2014, which the defendants opposed.  
Defendants filed a motion to dismiss the fraudulent inducement claim, which Ambac Assurance opposed.  The court heard oral argument 
on the defendants’ motion to dismiss the fraudulent inducement claim on April 14, 2015. On June 3, 2015, the court denied defendants’ 
July 2013 motion to dismiss Ambac’s claim for breaches of representations and warranties, but granted the defendants’ motion to dismiss 
Ambac’s claims for breach of the repurchase protocol and for alter ego liability against Nomura Holding. On December 29, 2016, the 
court issued a decision denying Nomura’s motion to strike Ambac’s amended complaint and its motion to dismiss the fraudulent inducement 
claim.  On January 31, 2017, Nomura filed a notice of appeal from that decision.  On March 27, 2017, Nomura appealed the June 2015 
decision to the extent it denied its motion to dismiss and filed its opening appellate brief.  Ambac Assurance opposed that appeal.  On 
December 7, 2017, the First Department affirmed the trial court’s June 3, 2015 decision. Discovery is ongoing.

•  The  Segregated Account  of Ambac Assurance  Corporation  and Ambac Assurance  Corporation  v.  Countrywide  Home  Loans,  Inc. 
(Wisconsin Circuit Court for Dane County, Case No 14 CV 3511, filed on December 30, 2014).  Ambac Assurance alleges a claim for 
fraudulent inducement in connection with Ambac Assurance’s issuance of insurance policies relating to five residential mortgage-backed 
securitizations that are not the subject of Ambac Assurance’s previously filed lawsuit against the same defendant. Defendant filed a motion 

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Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

to dismiss the complaint on February 20, 2015, which Ambac Assurance opposed. The court heard oral argument on two of Countrywide’s 
grounds for dismissal on June 23, 2015, and indicated that it would dismiss the Wisconsin Action without prejudice for lack of personal 
jurisdiction. The court issued an order to that effect on July 2, 2015. Ambac Assurance appealed the July 2, 2015 order. On June 23, 2016, 
the Wisconsin Court of Appeals reversed the trial court’s dismissal of the complaint, and on October 11, 2016, the Wisconsin Supreme 
Court granted Countrywide’s petition for review of the June 23 decision by the Wisconsin Court of Appeals.  The Wisconsin Supreme 
Court appeal was argued on February 28, 2017. On June 30, 2017, the Wisconsin Supreme Court reversed the decision of the Wisconsin 
Court of Appeals and remanded the case to the Wisconsin Court of Appeals for further proceedings.  On December 14, 2017, the Wisconsin 
Court of Appeals affirmed the trial court’s July 2, 2015 decision dismissing the case for lack of personal jurisdiction.  On January 16, 
2018, Ambac Assurance filed a petition with the Supreme Court of Wisconsin for review of the December 14, 2017 decision.  On January 
30, 2018, Countrywide opposed the petition. On June 30, 2015, plaintiffs filed a Summons with Notice in the Supreme Court of the State 
of New York, County of New York, No. 652321/15 (the “2015 New York Action”), alleging claims identical to the Wisconsin Action. 
On July 21, 2015, plaintiffs filed a complaint in the 2015 New York Action and a motion to stay the 2015 New York Action pending 
appeal and litigation of the Wisconsin Action. On August 5, 2015, Countrywide filed its opposition to plaintiffs’ motion to stay and on 
August 10, 2015, Countrywide filed a motion to dismiss the complaint, which Ambac opposed. The court held oral argument in November 
2015 and on September 20, 2016 granted Ambac Assurance’s motion to stay. Countrywide’s motion to dismiss the complaint is held in 
abeyance pending resolution of the Wisconsin Action.

•  Ambac Assurance  Corporation  and  the  Segregated Account  of Ambac Assurance  Corporation  v.  Countrywide  Home  Loans,  Inc., 
Countrywide Securities Corp., Countrywide Financial Corp., and Bank of America Corp. (Supreme Court of the State of New York, 
County of New York, Case No. 653979/2014, filed on December 30, 2014).  Ambac Assurance alleges a claim for fraudulent inducement 
in connection with Ambac Assurance’s issuance of insurance policies relating to eight residential mortgage-backed securitizations that 
are not the subject of Ambac Assurance’s previously filed lawsuits against the same defendants.  On February 20, 2015, the Countrywide 
defendants filed a motion to dismiss the complaint, which Bank of America joined on February 23, 2015.  Ambac Assurance opposed 
the motion. On December 20, 2016, the court issued a decision denying the defendants’ motion to dismiss.  Discovery is ongoing.

Ambac Assurance Corporation and The Segregated Account of Ambac Assurance Corporation v. U.S. Bank National Association (United 
States  District  Court,  Southern  District  of  New York,  Docket  No.  17-cv-00446  (SHS),  filed  January  20,  2017).   Ambac Assurance 
commenced  this  action  to  enjoin  the  defendant  from  accepting  a  proposed  settlement  in  a  separate  litigation  that  the  defendant  is 
prosecuting, as trustee, in connection with a residential mortgage-backed securitization for which Ambac Assurance issued an insurance 
policy.  Ambac Assurance alleges claims for declaratory judgment, breach of contract, breach of fiduciary duty, and violation of the Streit 
Act.  On February 14, 2017, plaintiffs filed an amended complaint asserting additional claims for declaratory judgment and breach of 
contract related to the defendant’s treatment of trust recoveries.  On February 23, 2017, plaintiffs filed a second amended complaint to 
reflect a revised settlement offer, and also filed a motion for a preliminary injunction, which U.S. Bank opposed.  On March 9, 2017, 
U.S. Bank filed a motion to dismiss the second amended complaint, which plaintiffs opposed.  The court heard oral argument on plaintiffs’ 
motion for a preliminary injunction and U.S. Bank’s motion to dismiss on April 24, 2017.  On June 1, 2017, the court denied U.S. Bank’s 
motion to dismiss and denied plaintiffs’ motion for a preliminary injunction.  U.S. Bank filed a motion for reconsideration of the court’s 
denial of its motion to dismiss, which plaintiffs opposed.  On December 6, 2017, the court granted the motion for reconsideration and 
granted U.S. Bank’s motion to dismiss, and on January 18, 2018, the court issued an opinion memorializing the reasons for its decision.  
On March 6, 2017, U.S. Bank filed a trust instruction proceeding in Minnesota state court concerning the proposed settlement, which is 
captioned, In the matter of HarborView Mortgage Loan Trust 2005-10, No. 27-TR-CV-17-32 (the “Minnesota Action”).  On April 5, 
2017, Ambac Assurance filed a motion to dismiss the Minnesota Action. On June 12, 2017, U.S. Bank filed an amended petition in the 
Minnesota Action and on July 7, 2017, Ambac Assurance renewed its motion to dismiss, which U.S Bank opposed. On November 13, 
2017, the court denied the motion to dismiss the proceeding. On February 7, 2018, Ambac Assurance appealed this dismissal. Additionally, 
certain certificate holders have objected or otherwise responded to the petition filed by U.S. Bank.

•  Ambac Assurance Corporation and The Segregated Account of Ambac Assurance Corporation v. U.S. Bank National Association (United 
States District Court, Southern District of New York, Docket No. 17-cv-02614, filed April 11, 2017).  Ambac Assurance alleges claims 
for breach of contract, breach of fiduciary duty, declaratory judgment, and violation of the Streit Act in connection with defendant’s 
failure  to  enforce  rights  and  remedies  and  defendant’s  treatment  of  trust  recoveries,  as  trustee  of  five  residential  mortgage-backed 
securitizations for which Ambac Assurance issued insurance policies. On September 15, 2017, U.S. Bank filed a motion to dismiss, which 
Ambac Assurance opposed on October 13, 2017. Oral argument on that motion was held on November 17, 2017. The motion remains 
pending.

Other Litigation

U.S. Securities and Exchange Commission (the “SEC”) v. Citigroup Global Markets Inc. (“Citigroup”) (United States District Court Southern 
District of New York, Docket No. 11-CV-7387, filed in October 2011). This suit related to a collateralized debt obligation transaction arranged 
by Citigroup where Ambac Credit Products, LLC (insured by Ambac Assurance) provided credit protection through a credit default swap to 
a bank counterparty that was exposed to the transaction. The SEC and Citigroup reached a settlement of this action for $285,000. The presiding 
judge approved the settlement in August of 2014. A fair fund has been established to distribute the $285,000 (plus $2,550 received from a 
related proceeding).  RCB Fund Services (the “Distribution Agent”) has been appointed as distribution agent for the fund and has invited 

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Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

investor participants in the CDO transaction to provide information regarding their investments in the CDO transaction.  Ambac Assurance 
filed a submission with the requested information on February 28, 2018.  The Distribution Agent, in consultation with the SEC, will then 
develop a distribution plan for the fair fund, which will be filed with the Court and will be subject to a comment period.  While there can be 
no assurance as what the Distribution Plan will provide, or the timing or substance of what the Court will decide, Ambac Assurance expects 
to receive a significant portion of the settlement funds. Ambac has not recorded any receivable for its estimated portion of these settlement 
funds

17. 

SUBSEQUENT EVENTS

As more fully discussed in Note 1. Background and Business Description, on February 12, 2018:

•  the Second Amended Plan of Rehabilitation became effective and a series of transactions were consummated which provided holders of 
beneficial interests in Deferred Amounts (other than Ambac, but including Ambac Assurance) a total effective consideration package, in 
full satisfaction and discharge of each $1.00 of Deferred Amounts (including accretion), of (i) $0.40  in cash, (ii) $0.41 in principal amount 
of new Secured Notes and (iii) from certain holders of surplus notes,  $0.125  currently outstanding surplus notes.  Such consideration 
package provided a discount of $0.065 (set first against accretion of Deferred Amounts). Ambac received  $0.91 in principal amount of 
Secured Notes for each $1.00 of Deferred Amounts (including accretion) that it held, and provided a $0.09 discount in full satisfaction 
and discharge of its Deferred Amount claims. This transaction is being accounted for as an extinguishment of Deferred Amounts and the 
discount of approximately $288,000 from the settlement will be reflected as a benefit to loss and loss expenses in the Consolidated 
Statements of Comprehensive Income (Loss) in the quarter ended March 31, 2018.  

•  the Exchange Offers were consummated, pursuant to which holders of surplus notes received the same effective package as holders of 
beneficial interests in Deferred Amounts, including the  discount of $0.065 in principal amount and accrued and unpaid interest on the 
surplus notes tendered; resulting in Ambac Assurance's cancellation of $809,520 of principal and accrued and unpaid interest of general 
account surplus notes. The Exchange Offers will be accounted for as a debt modification since the creditors before and after the discount 
remain the same and the change in the terms is not considered substantial. A substantial change is considered to be a change in cash flows 
of equal to or greater than 10% as a result of the modification of terms. As the change in cash flows is less than 10%, debt modification 
accounting is appropriate. Under debt modification accounting, no gain or loss is recorded, and a new effective interest rate is established 
based on the cash flows of the Ambac Note, which secures the Secured Notes issued as part of the Exchange Offers. Additionally, any 
consideration paid that is directly related to the issuance of the Ambac Note is capitalized and amortized as part of the effective yield 
calculation.

•  in connection with the Rehabilitation Exit Transactions, Ambac Assurance is making a one-time current interest payment on remaining 

surplus notes (other than junior surplus notes) of $13,501, of which $2,618 will be received by Ambac.

•  Ambac Assurance issued $240,000 of new debt secured by certain of Ambac Assurance’s rights to representation and warranty subrogation 
recoveries above $1,600,000 ("Tier 2 Notes").  The proceeds received from this issuance were used to fund the cash portion of the 
consideration paid pursuant to the Second Amended Plan of Rehabilitation and Exchange Offers.

•  Ambac will incur operating expenses in the first quarter of 2018 for its and the OCI's financial advisors that is approximately $14,000. 

In order to execute these transactions, Ambac established a special purpose entity, Ambac LSNI, LLC, for the sole purpose of the issuance of 
Secured Notes.  Ambac Assurance will not consolidate Ambac LSNI, LLC and will receive $768,464 par amount of the Secured Notes, which 
will be held in Ambac's investment portfolio.

Ambac's invested assets and cash will be reduced by the total cash outflow of approximately $1,353,560 and Ambac will experience reductions 
in the value of Ambac-insured RMBS securities held in the investment portfolio.

Ambac Assurance will record the principal amount of long-term debt for the Ambac Note of $2,154,351 and the Tier 2 Notes of $240,000.  
The key terms of these instruments are as follows:

•  The Ambac Note (and Secured Notes) will accrue interest at a per annum rate of 3-month U.S. Dollar LIBOR plus 5.00%, subject to a  
1.00% LIBOR floor.  Accrued and unpaid interest will be paid in cash on each payment date (quarterly on the last day of each quarter 
beginning with June 30, 2018) until the maturity date.  The maturity date for the Secured Notes and the Ambac Note will be the earlier 
of (x) February 12, 2023, and (y) if the Secured Notes are then outstanding, the date that is five business days prior to the date for which 
OCI has approved the repayment of the outstanding principal amount of the surplus notes (other than junior surplus notes) issued by 
Ambac Assurance.    Promptly,  and  in  any  event  within  four  business  days  after  the  receipt  (whether  directly  or  indirectly)  of  any 
representation and warranty subrogation recoveries, Ambac Assurance shall (i) apply an amount (the “Mandatory Redemption Amount”) 
equal to the lesser of (a) the amount of such RMBS proceeds and (b) all outstanding principal and accrued and unpaid interest on the 
Ambac Note to redeem the Ambac Note, in whole or in part, as applicable; provided, that any non-cash RMBS proceeds shall be deemed 
to be received upon the receipt of the applicable appraisal.  Redemptions or prepayments of the Ambac Note will result in corresponding 
redemptions or prepayments of the Secured Notes.

| Ambac Financial Group, Inc.   155   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
Notes to Consolidated Financial Statements
(Dollar Amounts in Thousands, Except Share Amounts)

•  The Tier 2 Notes will mature in 2055 and shall bear interest at a rate of 8.50% per annum, calculated on a 30/360 basis. Interest payments 
will not be made in cash on interest payment dates and shall be paid-in-kind and compounded on the last day of each calendar quarter, 
unless (i) funds are available to make such payments in cash as a result of receiving recoveries in respect of the representation and warranty 
subrogation recoveries in excess of $1,600,000 or (ii) interest is paid in cash on surplus notes (other than in connection with the Exchange 
Offers and Second Amended Plan of Rehabilitation). The Tier 2 Notes may not be redeemed or repaid prior to December 17, 2020, unless 
Ambac Assurance pays a make-whole premium. Thereafter, the Tier 2 Notes may be redeemed, in whole or in part, at the option of Ambac 
Assurance, at a price equal to 100% of the aggregate principal amount redeemed, plus accrued and unpaid interest, if any.

18. 

QUARTERLY INFORMATION (Unaudited) 

Net gains (losses) on interest rate derivatives

(1,514)

34,068

($ in thousands)

Gross premiums written

Net premiums earned

Net investment income

Net other than temporary impairment losses

Net realized investment gains (losses)

Net change in fair value of credit derivatives

Net realized gains (losses) on extinguishment

of debt

Income (loss) on Variable Interest Entities 

Losses and loss expenses (benefit)

Insurance intangible amortization

Operating expenses

Interest expense

Pre-tax income (loss)

Net income (loss) attributable to Common

Shareholders

Net income (loss) per share:

2017

2016

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

$

5,584

$

6,928

$ (24,696) $

(2,129) $ (24,780) $

(4,041) $ (10,543) $ (14,473)

47,613

81,559

(3,942)

(4,896)

1,052

43,152

85,160

52,989

87,177

31,523

107,057

52,800

60,821

41,402

70,758

53,218

90,917

49,867

90,871

(1,763)

(13,510)

(9,334)

(7,441)

(2,853)

(2,191)

4,180

6,624

6,150

179

3,984

(956)

(68)

8,517

23,027

1,102

12,866

14,897

3,955

11,749

1,733

(83,424)

(36,331)

(14,510)

2,741

3,701

135,011

37,525

27,980

31,572

(105,860)

2,179

(1,219)

66,100

33,471

31,051

28,234

13,992

—

—

1,235

(4,049)

21,237

(27,163)

3,586

8,987

24

2,057

209,806

102,269

(105,281)

(52,496)

(69,204)

215,492

45,690

33,791

29,145

34,168

28,694

30,990

(185,466)

(6,917)

50,890

28,009

30,430

12,854

39,013

27,995

30,709

61,511

44,553

21,466

31,493

40,152

36,190

31,712

116,720

(86,059)

$ (125,441) $

7,110

$ (190,905) $ (19,479) $

9,415

$

58,647

$ 101,474

$ (94,693)

11,536

1,552

83,992

—

2,026

Basic

Diluted

$

$

(2.77) $

(2.77) $

0.16

0.16

$

$

(4.20) $

(0.43) $

(4.20) $

(0.43) $

0.21

0.21

$

$

1.30

1.29

$

$

2.24

2.22

$

$

(2.09)

(2.09)

| Ambac Financial Group, Inc.   156   2017 FORM 10-K |

 
Item 9.  Changes 
Accountants on Accounting and Financial Disclosure.

in  and  Disagreements  with 

None.

Item 9A.   Controls and Procedures.

Evaluation  of  Disclosure  Controls  and  Procedures. Ambac’s 
disclosure  controls  and  procedures  are  designed  to  ensure  that 
information required to be disclosed under the Securities Exchange 
Act of 1934, as amended, is recorded, processed, summarized and 
reported within the time periods specified in the SEC’s rules and 
forms, including without limitation that information required to be 
disclosed  by  Ambac  in  its  SEC  filings  is  accumulated  and 
communicated  to  management,  including  the  Chief  Executive 
Officer (CEO) and Chief Financial Officer (CFO) as appropriate 
to allow for timely decisions regarding required disclosure. 

Ambac’s Disclosure Committee assists the CEO and CFO in their 
responsibilities  to  design,  establish,  maintain  and  evaluate  the 
effectiveness  of  disclosure  controls  and  procedures.  The 
Disclosure Committee is responsible for, among other things, the 
oversight,  maintenance  and  implementation  of  the  disclosure 
controls and procedures, subject to the supervision and oversight 
of the CEO and CFO. Ambac’s management, with the participation 
of its CEO and CFO, has evaluated the effectiveness of Ambac’s 
disclosure controls and procedures (as defined in Rule 13a-15(e) 
under the Securities Exchange Act of 1934) as of December 31, 
2017  and,  the  CEO  and  CFO  have  concluded  that  at  that  date 
Ambac’s disclosure controls and procedures were effective at the 
reasonable assurance level.

Management’s  Report  on  Internal  Control  Over  Financial 
Reporting.  Management of Ambac is responsible for establishing 
and maintaining adequate internal control over financial reporting. 
Ambac’s  internal  control  over  financial  reporting  is  a  process 
designed under the supervision of the CEO and CFO and overseen 
by Ambac’s Board of Directors to provide reasonable assurance 
regarding the reliability of financial reporting and the preparation 
of Ambac’s financial statements for external reporting purposes in 
accordance  with  U.S.  generally  accepted  accounting  principles. 
Ambac’s internal control over financial reporting includes those 
policies  and  procedures  that  (i)  pertain  to  the  maintenance  of 
records that, in reasonable detail, accurately and fairly reflect the 
transactions  and  dispositions  of  assets  of  Ambac;  (ii)  provide 
reasonable assurance that transactions are recorded as necessary 
to permit preparation of financial statements in accordance with 
U.S. generally accepted accounting principles, and that receipts 
and  expenditures  of  the  company  are  being  made  only  in 
accordance with authorizations of management and directors of 
Ambac;  and  (iii)  provide  reasonable  assurance  regarding  the 
prevention or timely detection and remediation of unauthorized 
acquisition, use or disposition of Ambac’s assets that could have 
a material effect on the financial statements.

Because of its inherent limitations, internal control over financial 
reporting  may  not  prevent  or  detect  misstatements.  Also, 
projections of any evaluation of effectiveness to future periods are 
subject to the risk that controls may become inadequate because 
of changes in conditions, or that the degree of compliance with the 
policies or procedures may deteriorate.

Ambac management conducted an assessment of the effectiveness 
of Ambac’s internal control over financial reporting based on the 
criteria  established  in  the  2013  Internal  Control  —  Integrated 
Framework issued by the Committee of Sponsoring Organizations 
of the Treadway Commission (COSO).

Ambac management has concluded that, as of December 31, 2017, 
our internal control over financial reporting was effective based 
on the criteria articulated in the 2013 Internal Control - Integrated 
Framework. The effectiveness of our internal control over financial 
reporting as of December 31, 2017 has been audited by KPMG 
LLP, an independent registered public accounting firm, as stated 
in  their  report,  which  expressed  an  unqualified  opinion  on  the 
effectiveness of Ambac’s internal control over financial reporting.  

Changes in Internal Control Over Financial Reporting.  There 
were no changes in the Company’s internal control over financial 
reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) 
under the Exchange Act) during the fourth quarter of 2017 that 
have  materially  affected,  or  are  reasonably  likely  to  materially 
affect, Ambac's internal control over financial reporting.

Item 9B.  Other Information

Appointment  of  New  Director.    The  Board  of  Directors  of  the 
Company appointed Joan Lamm-Tennant to both the Ambac Board 
and Ambac Assurance Board effective March 1, 2018. A copy of 
the Company’s press release announcing this information is being 
filed  as  exhibit  99.5  to  this Annual  Report  on  Form  10-K.  Ms. 
Lamm-Tennant has also been appointed as a member of the Audit 
Committee and Strategy and Risk Policy Committee of the Board.

PART III

Item 10.  Directors, Executive Officers and Corporate 
Governance

Information relating to Ambac’s executive officers and directors, 
including its audit committee and audit committee financial experts 
will be in Ambac’s definitive Proxy Statement for its 2018 Annual 
Meeting of Stockholders which will be filed within 120 days of 
the end of our fiscal year ended December 31, 2017 (the “2018 
Proxy Statement”) and is incorporated herein by reference. 

Ambac  has  a  Code  of  Business  Conduct  which  promotes 
management’s control philosophy and expresses the values which 
govern  employee  behavior  and  help  maintain  Ambac’s 
commitment to the highest standards of conduct. This code can be 
found on Ambac’s website at www.ambac.com on the “Investor 
Relations”  page  under  “Corporate  Governance.”  Ambac  will 
disclose  on  its  website  any  amendment  to,  or  waiver  from,  a 
provision of its Code of Business Conduct that applies to its Chief 
Executive  Officer,  Chief  Financial  Officer  or  Chief Accounting 
Officer. Ambac’s corporate governance guidelines and the charters 
for the committees of the Board of Directors are also available on 
our website under the “Corporate Governance” page.

Item 11. 

Executive Compensation.

Information  relating  to Ambac’s  executive  officer  and  director 
compensation  will  be  in  the  2018  Proxy  Statement  and  is 
incorporated herein by reference.

| Ambac Financial Group, Inc.   157   2017 FORM 10-K |

Item 12. 

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Information relating to security ownership of certain beneficial owners of Ambac’s common stock and information relating to the security 
ownership of Ambac’s management will be in the 2018 Proxy Statement and is incorporated herein by reference.

Equity Compensation Plan Information

The following table provides information as of December 31, 2017 regarding securities issued under our 2013 Incentive Compensation Plan.

Equity compensation plans approved by security

holders

Equity compensation plans not approved by

security holders

Total

Plan  
Category

2013 Incentive
Compensation Plan (1)

None

Number of Securities  
to be Issued Upon
Exercise of  
Outstanding Options,  
Warrants and Rights

Weighted-Average
Exercise Price of  
Outstanding  
Options,  
Warrants and Rights

Number of Securities
Remaining Available  
for Future Issuance  
Under Equity  
Compensation Plans  
(Excluding Securities  
Reflected in the  
Third Column)

959,356 (2) (3)

---
959,356 (2) (3)

$24.03 (4)

---
$24.03 (4)

2,793,323

---

2,793.323

(1)  Our 2013 Incentive Compensation Plan was approved by the stockholders of Ambac on December 18, 2013. The total number of shares of Ambac common 

stock available for issuance under the 2013 Incentive Compensation Plan is 4,000,000.

(2)  Represents, as of December 31, 2017, the number of outstanding restricted stock unit awards, stock options and the maximum number of performance 
stock units that may be issued if certain performance goals are achieved. Refer to Note 15. Employment Benefit Plans to the Consolidated Financial 
Statements included in Part II, Item 8 in this Form 10-K for a description of the grants made under the 2013 Incentive Compensation Plan.  This amount 
includes 221,803 restricted stock units, 126,667 options and 610,886 performance stock units which are based on the maximum number of shares potentially 
payable under the awards.       

(3)  Each restricted stock unit, stock option and performance stock unit awarded under our 2013 Incentive Compensation Plan was granted at no cost to the 
persons receiving them. Restricted stock units represent the contingent right to receive the equivalent number of shares of Ambac common stock and may 
vest after the passage of time, or the achievement of a corporate goal, or both.  Stock options represent the right to acquire an equivalent number of shares 
of Ambac common stock at a specified exercise price.  Performance stock units granted pursuant to the Company's Long Term Incentive Plan represent 
the contingent right to receive a number of shares of Ambac common stock ranging from 0% to 200% of the number of units granted depending upon the 
achievement of certain company-wide performance goals.

(4)  Reflects the weighted-average price of all outstanding options that had been granted but not forfeited, expired or exercised.  Performance shares and 

restricted stock units are not included in determining the weighted-average price as they have no exercise price.  

Item 13. 
Transactions, and Director Independence.

Certain  Relationships 

and 

Information relating to Ambac with respect to certain relationships 
and related transactions and director independence will be in the 
2018 Proxy Statement and is incorporated herein by reference.

related 

Item 14. 

Principal Accountant Fees and Services.

Information relating to principal accountant fees and services will 
be  in  the  2018  Proxy  Statement  and  is  incorporated  herein  by 
reference.

Item 15. 

Exhibits, Financial Statement Schedules

(a) 

Documents filed as a part of this report: 

1.  Financial Statements 

PART IV

The consolidated financial statements included in Part II, Item 8 above are filed as part of this Annual Report on Form 10-K. 

2.  Financial Statement Schedules 

The financial statement schedules filed herein, which are the only schedules required to be filed, are as follows: 

Schedule I — Summary of Investments Other Than Investments in Related Parties ........................................................

Schedule II — Condensed Financial Information of Registrant (Parent Company Only) .................................................

Schedule IV — Reinsurance...............................................................................................................................................

Page

163

164

169

| Ambac Financial Group, Inc.   158   2017 FORM 10-K |

(b)

Exhibits

(3)  Articles of Incorporation and bylaws:

3.1

3.2

Amended and Restated Certificate of Incorporation of Ambac Financial Group, Inc. (incorporated by reference to Exhibit 
3.1 to Form 8-A, filed on May 1, 2013).
Amended By-laws of Ambac Financial Group, Inc. (filed as Exhibit 3.2 to Ambac Financial Group, Inc.’s Annual Report 
on Form 10-K for the year ended December 31, 2013 and incorporated herein by reference).

(4) 

Instruments defining the rights of security holders, including indentures:
4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

4.12

4.13

4.14

4.15

4.16

Specimen form of common stock certificate (incorporated by reference to Exhibit 4.1 to Form 8-A, filed on May 1, 
2013).
Warrant Agreement between Ambac Financial Group, Inc. and Computershare Inc. (incorporated by reference to Exhibit 
4.2 to Form 8-A, filed on May 1, 2013).
Specimen form of warrant certificate (included in Exhibit 4.2).

Junior Note Fiscal Agency Agreement, dated as of April 30, 2013, by and between the Segregated Account of Ambac 
Assurance Corporation and The Bank of New York Mellon, as fiscal agent (filed as Exhibit 4.5 to Ambac Financial 
Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2013 and incorporated herein by reference).
5.1% Junior Surplus Note due June 7, 2020 in the aggregate amount of $350 million issued by the Segregated Account 
of Ambac Assurance Corporation pursuant to the Junior Note Fiscal Agency Agreement, dated as of April 30, 2013 
(filed as Exhibit 4.6 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 
Form of 5.1% Non-Reducing Junior Surplus Note due June 7, 2020 issued by the Segregated Account of Ambac Assurance 
Corporation (filed as Exhibit 4.7 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended 
December 31, 2013 and incorporated herein by reference).

Form of 5.1% Bankruptcy Reducing Junior Surplus Note due June 7, 2020 issued by the Segregated Account of Ambac 
Assurance Corporation (filed as Exhibit 4.8 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the 
year ended December 31, 2013 and incorporated herein by reference).

Form of 5.1% Reducing Junior Surplus Note due June 7, 2020, issued by the Segregated Account of Ambac Assurance 
Corporation (filed as Exhibit 4.9 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended 
December 31, 2013 and incorporated herein by reference).

Fiscal Agency Agreement, dated as of July 19, 2010, by and between the Segregated Account of Ambac Assurance 
Corporation and The Bank of New York Mellon, as fiscal agent (filed as Exhibit 4.10 to Ambac Financial Group, Inc.’s 
Annual Report on Form 10-K for the year ended December 31, 2013 and incorporated herein by reference).

Form of Surplus Note due June 7, 2020 issued by the Segregated Account of Ambac Assurance Corporation.(included 

in Exhibit 4.9).
Fiscal Agency Agreement, dated as of June 7, 2010, by and between Ambac Assurance Corporation and The Bank of 
New York Mellon, as fiscal agent (filed as Exhibit 10.3 to Ambac Financial Group, Inc.’s Current Report on Form 8-
K filed June 8, 2010 and incorporated herein by reference).
Amendment dated as of October 3, 2014 to Fiscal Agency Agreement dated as of June 7, 2010 by and between Ambac 
Assurance Corporation and The Bank of New York Mellon, as fiscal agent (filed as Exhibit 4.1 to Ambac Financial 
Group, Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2015 and incorporated herein by 
reference).
Indenture (including the form of Notes), dated as of February 12, 2018, between Ambac LSNI, LLC and The Bank of New York 
Mellon, as trustee and note collateral agent, providing for the issuance of insured secured notes (filed as exhibit 4.1 to Ambac 
Financial Group, Inc.'s Current Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).

Indenture (including the form of Notes), dated as of February 12, 2018, between Ambac LSNI, LLC and The Bank of New York 
Mellon, as trustee and note collateral agent, providing for the issuance of insured secured notes (filed as exhibit 4.2 to Ambac 
Financial Group, Inc.'s Current Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).

Indenture (including the form of Notes), dated as of February 12, 2018, between Ambac Assurance Corporation and The Bank of 
New York Mellon, as trustee and note collateral agent providing for the issuance of senior notes secured by certain interests in 
proceeds of certain RMBS litigation (filed as exhibit 4.3 to Ambac Financial Group, Inc.'s Current Report on Form 8-K filed 
February 15, 2018 and incorporated herein by reference).

Supplemental Fiscal Agency Agreement, dated as of February 12, 2018, among the Segregated Account of Ambac Assurance 

Corporation, Ambac Assurance Corporation and The Bank of New York Mellon, as fiscal agent (filed as exhibit 4.4 to Ambac 
Financial Group, Inc.'s Current Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).

(10)  Material contract and management compensation plans and arrangements:

10.1

10.2

10.3

Amended and Restated Trust Agreement dated as of August 28, 2014, among Ambac Financial Group, Inc., The Bank 
of New York Mellon, and Wilmington Trust, National Association (filed as exhibit 99.2 to Ambac Financial Group, 
Inc.’s Current Report on Form 8-K filed August 28, 2014 and incorporated herein by reference).
Long-Term Incentive Compensation Agreement dated as of May 9, 2014 between Ambac Financial Group, Inc. and 
David Trick (filed as Exhibit 10.3 to Ambac Financial Group Inc.'s Quarterly Report on Form 10-Q for the quarter 
ended June 30, 2014 and incorporated herein by reference).
Long-Term Incentive Compensation Agreement dated as of May 9, 2014 between Ambac Financial Group, Inc. and 
Robert B. Eisman (filed as Exhibit 10.4 to Ambac Financial Group, Inc.'s Quarterly Report on Form 10-Q for the quarter 
ended June 30, 2014 and incorporated herein by reference).

| Ambac Financial Group, Inc.   159   2017 FORM 10-K |

(b)

Exhibits

10.4

10.5

10.6

10.7

10.8

10.9

10.10

10.11

10.12

10.13

10.14

10.15

10.16

10.17

10.18

10.19

10.20

10.21

10.22

10.23

10.24

10.25+

Ambac Financial Group, Inc.'s Long-Term Incentive Compensation Plan (filed as Exhibit 10.1 to Ambac Financial Group, 
Inc.'s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014 and incorporated herein by reference).
Ambac Financial, Group, Inc.’s Incentive Compensation Plan (filed as Appendix A to Ambac Financial Group’s 2013 
Definitive Proxy Statement on Schedule DEF 14A filed on November 8, 2013 and incorporated herein by reference).
Form of Amended and Restated Restricted Stock Unit Award Letter for executive officers (filed as Exhibit 10.4 to Ambac 
Financial Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2013 and incorporated herein 
by reference).

Form of Equity Award Letter for directors (filed as Exhibit 10.5 to Ambac Financial Group, Inc.’s Annual Report on 
Form 10-K for the year ended December 31, 2013 and incorporated herein by reference).
Closing Agreement between Ambac Financial, Group, Inc. and Commissioner of Internal Revenue, dated April 30, 2013 
(filed  as  Exhibit  10.2  to Ambac  Financial  Group,  Inc.’s  Current  Report  on  Form  8-K,  filed  on  May  3,  2013  and 
incorporated herein by reference).
Amendment No. 1, dated April 29, 2013, to the Amended and Restated Tax Sharing Agreement among Ambac Financial 
Group, Inc. and certain of its affiliates (filed as Exhibit 10.1 to Ambac Financial Group, Inc.’s Current Report on Form 
8-K, filed on May 3, 2013 and incorporated herein by reference).
Tax Sharing Agreement dated March 14, 2012 among Ambac Financial Group, Inc. and certain of its affiliates (filed as 
Exhibit 10.12 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2013 
and incorporated herein by reference).
Form of Amendment No. 1 to Cooperation Agreement between the Segregated Account of Ambac Assurance Corporation 
and Ambac Assurance Corporation (filed as Exhibit 10.3 to Ambac Financial Group, Inc.’s Current Report on Form 8-
K filed September 27, 2011 and incorporated herein by reference).
Form of Expense Sharing and Cost Allocation Agreement among Ambac Assurance Corporation, Ambac Financial Group, 
Inc. and their respective subsidiaries and affiliates (filed as Exhibit 10.2 to Ambac Financial Group, Inc.’s Current 
Report on Form 8-K filed September 27, 2011 and incorporated herein by reference).
Mediation Agreement dated September 21, 2011 among Ambac Financial Group, Inc., Ambac Assurance Corporation, 
the statutory committee of creditors appointed by the United States Trustee on November 17, 2010, the Segregated 
Account of Ambac Assurance Corporation, the Rehabilitator of the Segregated Account, and OCI (filed as Exhibit 10.1 
to Ambac Financial Group, Inc.’s Current Report on Form 8-K filed September 27, 2011 and incorporated herein by 
Lease, dated as of March 1, 2011, by and between One State Street, LLC and Ambac Assurance Corporation (filed as 
Exhibit 10.34 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2010 
and incorporated herein by reference).
Settlement, Discontinuance and Release Agreement, dated as of March 1, 2011, by and among One State Street, LLC, 
Ambac  Financial  Group,  Inc.,  Ambac  Assurance  Corporation  and  the  Segregated  Account  of  Ambac  Assurance 
Corporation (filed as Exhibit 10.33 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended 
December 31, 2010 and incorporated herein by reference).
Settlement Agreement, dated as of June 7, 2010, by and among Ambac Assurance Corporation, Ambac Credit Products 
LLC, Ambac Financial Group, Inc. and the parties listed on Schedule A thereto (filed as Exhibit 10.1 to Ambac Financial 
Group, Inc.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010 and incorporated herein by 
Ambac Financial Group, Inc. Severance Pay Plan (Applicable to termination on or after January 1, 2010) (filed as Exhibit 
10.26 to Ambac Financial Group, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2010 and 
incorporated herein by reference).
Management  Services Agreement,  dated  as  of  March  24,  2010,  by  and  between  the  Segregated Account  of Ambac 
Assurance Corporation and Ambac Assurance Corporation (filed as Exhibit 10.22 to Ambac Financial Group, Inc.’s 
Annual Report on Form 10-K for the year ended December 31, 2009 and incorporated herein by reference).

Cooperation Agreement, dated as of March 24, 2010, by and between the Segregated Account of Ambac Assurance 
Corporation and Ambac Assurance Corporation (filed as Exhibit 10.23 to Ambac Financial Group, Inc.’s Annual Report 
on Form 10-K for the year ended December 31, 2009 and incorporated herein by reference).
Aggregate Excess of Loss Reinsurance Agreement, dated as of March 24, 2010, by and between the Segregated Account 
of Ambac Assurance Corporation and Ambac Assurance Corporation (filed as Exhibit 10.24 to Ambac Financial Group, 
Inc.’s Annual Report on Form 10-K for the year ended December 31, 2009 and incorporated herein by reference).
Secured Note, dated as of March 24, 2010, from Ambac Assurance Corporation to the Segregated Account of Ambac 
Assurance Corporation (filed as Exhibit 10.25 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the 
year ended December 31, 2009 and incorporated herein by reference).
Lease Modification dated as of September 8, 2015 to the Lease dated as of March 1, 2011, by and between One State 
Street, LLC and Ambac Assurance Corporation (filed as Exhibit 10.27 to Ambac Financial Group, Inc.’s Annual Report 
on Form 10-K for the year ended December 31, 2015 and incorporated herein by reference).
Form of 2015 Long-Term Incentive Compensation Agreement between Ambac Financial Group, Inc. and each of the 
Company's executive officers (filed as Exhibit 10.28 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K 
for the year ended December 31, 2015 and incorporated herein by reference).
Form of 2016 Long-Term Incentive Compensation Agreement between Ambac Financial Group, Inc. and each of the 
Company's executive officers (filed as Exhibit 10.27 to Ambac Financial Group, Inc.'s Annual Report on Form 10-K 
for the year ended December 31, 2016 and incorporated herein by reference).
Form of 2017 Long-Term Incentive Compensation Agreement between Ambac Financial Group, Inc. and each of the 
Company's executive officers.

| Ambac Financial Group, Inc.   160   2017 FORM 10-K |

(b)

Exhibits

10.26

10.27

10.28

10.29

10.30

10.31

10.32

10.33

10.34

10.35

10.36

10.37

10.38

10.39

10.40

Voting Support Settlement Agreement, dated as of March 28, 2016, by and between Ambac Financial Group, Inc. and 
Cornwall Master LP (filed as Exhibit 10.3 to Ambac Financial Group, Inc.’s Current Report on Form 8-K filed on March 
29, 2016 and incorporated herein by reference).
Employment Agreement dated as of November 1, 2016 by and among Ambac Financial Group, Inc., Ambac Assurance 
Corporation and David Trick (filed as Exhibit 10.2 to Ambac Financial Group, Inc.’s Quarterly Report on Form 10-Q 
for the quarter ended September 30, 2016 and incorporated herein by reference).
Employment Agreement dated as of December 8, 2016, by and among Ambac Financial Group, Inc., Ambac Assurance 
Corporation and Claude LeBlanc (filed as Exhibit 10.1 to Ambac Financial Group, Inc.’s Current Report on Form 8-K 
filed on December 13, 2016 and incorporated herein by reference).
Employment Agreement dated as of January 4, 2017 by and among Ambac Financial Group, Inc., Ambac Assurance 
Corporation and Stephen Ksenak (filed as Exhibit 10.1 to Ambac Financial Group, Inc.’s Current Report on Form 8-K 
filed on January 6, 2017 and incorporated herein by reference).
Rehabilitation Exit Support Agreement, by and among Ambac Assurance Corporation, Ambac Financial Group, Inc. and 
certain holders of Ambac Assurance Corporation’s 5.1% Surplus Notes due 2020 and certain holders of Ambac Assurance 
Corporation’s deferred payment obligations, dated as of July 19, 2017 (filed as Exhibit 10.1 to Ambac Financial Group, 
Inc.’s Current Report on Form 8-K filed on July 19, 2017 and incorporated herein by reference).
Tier 2 Commitment Letter, dated as of July 19, 2017 from funds affiliated with or managed by investors party thereto 
(filed  as  Exhibit  10.2  to Ambac  Financial  Group,  Inc.’s  Current  Report  on  Form  8-K  filed  on  July  19,  2017  and 
incorporated herein by reference).
First Amendment to the Rehabilitation Exit Support Agreement, by and among Ambac Assurance Corporation, Ambac 
Financial Group, Inc. and certain holders of Ambac Assurance Corporation’s 5.1% Surplus Notes due 2020 and certain 
holders of Ambac Assurance Corporation’s deferred payment obligations, dated as of September 21, 2017 (filed as 
Exhibit 10.1 to Ambac Financial Group, Inc.’s Current Report on Form 8-K filed on September 26, 2017 and incorporated 
herein by reference).

Financial Guaranty Insurance Policy, dated February 12, 2018, issued by Ambac Assurance Corporation (filed as exhibit 10.1 to 

Ambac Financial Group, Inc.'s Current Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).

Collateral Agreement, dated as of February 12, 2018, made by Ambac LSNI, LLC in favor of The Bank of New York Mellon, as note 

collateral agent, trustee and paying agent for the secured parties (filed as exhibit 10.2 to Ambac Financial Group, Inc.'s Current 
Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).

Pledge Agreement, dated as of February 12, 2018, made by Ambac Assurance Corporation in favor of The Bank of New York 

Mellon, as note collateral agent, trustee and paying agent (filed as exhibit 10.3 to Ambac Financial Group, Inc.'s Current Report on 
Form 8-K filed February 15, 2018 and incorporated herein by reference).

Collateral Agreement, dated as of February 12, 2018, made by Ambac Assurance Corporation in favor of The Bank of New York 

Mellon, as note collateral agent, trustee and paying agent for the secured parties (filed as exhibit 10.4 to Ambac Financial Group, 
Inc.'s Current Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).

Waiver and Amendment, dated as of February 12, 2018, among Ambac Assurance Corporation, Ambac Credit Products, LLC, 

Ambac Financial Group, Inc. and the other signatories party thereto (filed as exhibit 10.5 to Ambac Financial Group, Inc.'s Current 
Report on Form 8-K filed February 15, 2018 and incorporated herein by reference).
Second Amended Plan of Rehabilitation of the Segregated Account of Ambac Assurance Corporation dated September 
25, 2017, and effective as of February 12, 2018.
Order Granting the Rehabilitator’s Motion to Further Amend the Plan of Rehabilitation and confirming the Second 
Amended Plan of Rehabilitation, as amended, Case No. 10-CV-1576 (Dane County, Wisconsin) dated January 22, 
2018.
Stipulation and Order - Office of the Commissioner of Insurance of the State of Wisconsin, in the Matter of the 
Rehabilitation of the Segregated Account of Ambac Assurance Corporation effective as of February 12, 2018.

(99)  Additional exhibits

99.1

99.2

99.3

99.4

99.5

Amendment  dated  as  June  12,  2014  to  the  Plan  of  Rehabilitation  of  the  Segregated Account  of Ambac Assurance 
Corporation (filed as Exhibit 99.1 to Ambac Financial Group, Inc.'s Quarterly Report on Form 10-Q for the quarter 
ended September 30, 2014 and incorporated herein by reference.)
Second Modified Fifth Amended Plan of Reorganization of Ambac Financial Group, Inc., effective as of May 1, 2013 
(filed as Exhibit 99.3 to Ambac Financial Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 
2013 and incorporated herein by reference).
Plan of Rehabilitation of the Segregated Account of Ambac Assurance Corporation. (Filed as Exhibit 99.2 to Ambac 
Financial Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2010 and incorporated herein 
by reference.)

Plan of Operation of the Segregated Account of Ambac Assurance Corporation (Filed as Exhibit 99.1 to Ambac Financial 
Group, Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2010 and incorporated herein by reference.)
Press Release dated February 28, 2018, announcing the appointment of Joan Lamm-Tennant, effective March 1, 2018, 
to the the Board of Directors of Ambac Financial Group, Inc. 

| Ambac Financial Group, Inc.   161   2017 FORM 10-K |

(b)

Exhibits

Other exhibits, filed or furnished, as indicated:

12.1+

21.1+

23.1+

24.1+

31.1+

31.2+

32.1++

101.INS

Computation of Ratio of Earnings to Fixed Charges

List of Subsidiaries of Ambac Financial Group, Inc.

Consent of Independent Registered Public Accounting Firm

Power of Attorney for directors of Ambac Financial Group, Inc.

Certification of Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) Promulgated under the Securities 
Exchange Act of 1934, as amended.
Certification of Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) Promulgated under the Securities 
Exchange Act of 1934, as amended.
Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350 as Adopted 
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
XBRL Instance Document.

101.SCH

XBRL Taxonomy Extension Schema Document.

101.CAL

XBRL Taxonomy Extension Calculation Linkbase Document.

101.LAB

XBRL Taxonomy Extension Label Linkbase Document.

101.PRE

XBRL Taxonomy Extension Presentation Linkbase Document.

101.DEF

XBRL Taxonomy Extension Definition Linkbase Document.

+ Filed herewith.                   ++ Furnished herewith.

| Ambac Financial Group, Inc.   162   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE I — SUMMARY OF INVESTMENTS
Other Than Investments in Related Parties
December 31, 2017

Type of Investment
($ in Thousands)

Municipal obligations

Corporate obligations

Foreign obligations

U.S. government obligations

Residential mortgage-backed securities

Collateralized debt obligations

Other asset-backed securities

Short-term

Other

Total

Amortized
Cost

Estimated
Fair Value

Amount at Which
Shown in the
Balance Sheet

$

845,778

$

779,834

$

858,774

26,245

186,619

860,075

26,543

185,127

779,834

860,075

26,543

185,127

2,214,512

2,251,333

2,251,333

50,754

531,660

557,476

396,689

51,037

597,942

557,270

431,630

51,037

597,942

557,270

431,630

$

5,668,507

$

5,740,791

$

5,740,791

| Ambac Financial Group, Inc.   163   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE II— CONDENSED FINANCIAL INFORMATION
OF REGISTRANT (PARENT COMPANY ONLY)
Condensed Balance Sheets

($ in thousands, except share data) December 31,

2017

2016

Assets:

Fixed income securities, at fair value (amortized cost: 2017—$239,476 and 2016—$220,749)

$

230,055

$

Short-term investments, at cost (approximates fair value)

Other investments

Total investments

Cash

Investment in subsidiaries

Investment income due and accrued
Current taxes receivable(1)

Other assets

Total assets

Liabilities and Stockholders' Equity:

Liabilities:

Accounts payable and other liabilities

Total liabilities

Stockholders’ equity:

Preferred stock, par value $0.01 per share; 20,000,000 shares authorized shares; issued and outstanding

shares—none

Common stock, par value $0.01 per share; 130,000,000 shares authorized; issued and outstanding shares:

45,275,982 and 45,194,954

Additional paid-in capital

Accumulated other comprehensive income (loss)

Retained earnings

Treasury stock, shares at cost: 24,816 and 22,458

Total Ambac Financial Group, Inc. stockholders’ equity

Total liabilities and stockholders’ equity

69,531

64,691

364,277

3,949

968,392

329

29,576

14,946

214,023

66,570

30,003

310,596

32,251

1,340,442

272

28,722

4,132

$

1,381,469

$

1,716,415

321

321

—

453

199,560

(52,239)

1,233,845

(471)

1,381,148

$

1,381,469

$

2,501

2,501

—

452

195,267

(38,990)

1,557,681

(496)

1,713,914

1,716,415

(1)  Of these amounts, $30,496 and  $28,691 receivable from the Registrant's wholly-owned subsidiary, Ambac Assurance Corporation, pursuant to the Amended 

TSA.

The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto and the following notes.

| Ambac Financial Group, Inc.   164   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE II— CONDENSED FINANCIAL INFORMATION
OF REGISTRANT (PARENT COMPANY ONLY)
Condensed Statement of Comprehensive Income

($ in thousands) Year Ended December 31,

2017

2016

2015

Revenues:

Investment income

Other than temporary impairments

Net realized gains (losses)

Total revenues

Expenses:

Operating expenses

Total expenses

Income (loss) before income taxes and equity in undistributed net loss of subsidiaries

Federal income tax provision (benefit)

Income before equity in undistributed net income of subsidiaries

Equity in undistributed net income (loss) of subsidiaries

Net income (loss)

Other comprehensive income (loss), after tax:

Net income (loss)

Unrealized gains (losses) on securities, net of deferred income taxes of $0

Gain (loss) on foreign currency translation, net of deferred income taxes of $0.

Changes to postretirement benefit, net of tax

Total other comprehensive income (loss)

Total comprehensive income (loss) attributable to Ambac Financial Group, Inc.

$

24,411

$

13,493

$

(550)

(6,575)

17,286

3,913

3,913

13,373

(29,398)

42,771

(371,486)

(289)

(7)

13,197

11,486

11,486

1,711

(28,739)

30,450

44,393

$

$

$

(328,715) $

74,843

$

(328,715) $

74,843

$

(81,520)

73,586

1,273

(6,661)

67,900

(122,128)

23

(54,205)

(335,376) $

20,638

$

9,826

(155)

(27)

9,644

8,922

8,922

722

(70,811)

71,533

421,870

493,403

493,403

(159,730)

(44,651)

(687)

(205,068)

288,335

The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto and the following notes.

| Ambac Financial Group, Inc.   165   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE II— CONDENSED FINANCIAL INFORMATION
OF REGISTRANT (PARENT COMPANY ONLY)
Condensed Statement of Stockholders' Equity

($ in thousands)

Total

Retained
Earnings

Accumulated
Other
Comprehensive
Income

Preferred
Stock

Common
Stock

Common
Stock Held
in 
Treasury,
at Cost

Additional 
Paid-in
Capital

Balance at January 1, 2017

$ 1,713,914

$ 1,557,681

$

(38,990) $

— $

452

$

195,267

$

(496)

Total comprehensive income (loss)

(335,376)

(328,715)

Adjustment to initially apply ASU 2018-02

Adjustment to initially apply ASU 2016-09

Stock-based compensation

Cost of shares (acquired) issued under 

equity plan

Issuance of common stock

—

(137)

4,293

6,588

(137)

—

(1,547)

(1,572)

1

—

Balance at December 31, 2017

$ 1,381,148

$ 1,233,845

Balance at Balance at January 1, 2016

$ 1,684,799

$ 1,478,439

Total comprehensive income

Adjustment to initially apply ASU 2014-13

Stock-based compensation

Cost of shares (acquired) issued under 

equity plan

Cost of warrants acquired

Issuance of common stock

Warrants exercised

20,638

6,442

5,253

(505)

(2,717)

2

2

74,843

6,442

—

(127)

(1,916)

—

—

Balance at December 31, 2016

$ 1,713,914

$ 1,557,681

Balance at January 1, 2015

$ 1,399,105

$ 989,290

$

$

$

$

(6,661)

(6,588)

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

1

—

—

—

4,293

—

—

(52,239) $

— $

453

$

199,560

15,215

$

— $

450

$

190,813

(54,205)

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

2

—

—

—

5,253

—

(801)

—

2

(38,990) $

— $

452

$

195,267

220,283

$

— $

450

$

189,138

$

$

$

$

Total comprehensive income

Stock-based compensation

Cost of shares (acquired) issued under 

equity plan

Cost of warrants acquired

Warrants exercised

288,335

493,403

(205,068)

3,105

—

(374)

(5,375)

3

(312)

(3,942)

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

3,105

—

(1,433)

3

Balance at December 31, 2015

$ 1,684,799

$ 1,478,439

$

15,215

$

— $

450

$

190,813

$

The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto and the following notes.

—

—

—

—

25

—

(471)

(118)

—

—

—

(378)

—

—

—

(496)

(56)

—

—

(62)

—

—
(118)  

| Ambac Financial Group, Inc.   166   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE II— CONDENSED FINANCIAL INFORMATION
OF REGISTRANT (PARENT COMPANY ONLY)
Condensed Statements of Cash Flow

($ in thousands) Year Ended December 31,

Cash flows from operating activities:

Net income (loss)

2017

2016

2015

$

(328,715) $

74,843

$

493,403

Adjustments to reconcile net income loss to net cash used in operating activities:

Equity in undistributed net (income) loss of non-debtor subsidiaries

Amortization of bond premium and discount

Other-than-temporary impairment charges

Net realized gains (losses)

Increase (decrease) in current income taxes payable

Share-based compensation

Investment income due and accrued

(Increase) decrease in other assets

Other, net

Net cash provided by (used in) operating activities

Cash flows from investing activities:

Proceeds from matured bonds

Purchases of bonds

Change in short-term investments

Change in other investments

Other, net

Net cash provided by (used in) investing activities

Cash flows from financing activities:

Cost of warrants acquired

Proceeds from warrant exercise

Net cash (used in) financing activities

Net cash flow

Cash at beginning of period

Cash at end of period

Supplemental disclosure of cash flow information:

Cash paid during the period for:

Income taxes

371,486

(16,724)

550

6,575

(854)

4,293

(57)

(10,814)

(9,960)

15,780

186,747

(195,853)

(2,961)

(34,688)

2,673

(44,082)

—

—

—

(28,302)

32,251

(44,393)

(7,208)

289

7

42,126

5,253

(149)

646

5,814

77,228

269,459

(279,582)

(18,491)

(4,664)

(9,009)

(42,287)

(2,717)

2

(2,715)

32,226

25

3,949

$

32,251

$

(421,870)

(4,690)

155

27

(71,069)

3,105

(69)

991

549

532

347,539

(312,419)

(25,143)

(5,253)

—

4,724

(5,375)

3

(5,372)

(116)

141

25

784

$

635

$

394

$

$

The condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto and the following notes.

| Ambac Financial Group, Inc.   167   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE II— CONDENSED FINANCIAL INFORMATION
OF REGISTRANT (PARENT COMPANY ONLY)
Notes to Condensed Financial Information
(Dollar Amounts in Thousands)

The condensed financial information of Ambac Financial Group, Inc. (“Ambac” or the “Registrant”) as of December 31, 2017 and 2016 and 
for the three years in the period ended December 31, 2017, should be read in conjunction with the consolidated financial statements of Ambac 
Financial Group, Inc. and Subsidiaries and the notes thereto included in this 2017 Annual Report on Form 10-K for the year ended December 31, 
2017.

Ambac, headquartered in New York City, is a financial services holding company incorporated in the state of Delaware on April 29, 1991. On 
May 1, 2013, Ambac emerged from Chapter 11 bankruptcy protection when the Second Modified Fifth Amended Plan of Reorganization of 
Ambac (the “Reorganization Plan”) became effective. On December 26, 2013, the United States Bankruptcy Court for the Southern District 
of New York (the “Bankruptcy Court”) entered an order of final decree closing Ambac’s Chapter 11 case. Ambac filed a voluntary petition 
for relief under Chapter 11 of the United States Bankruptcy Code in the Bankruptcy Court on November 8, 2010.

Income Taxes

Ambac files a consolidated Federal income tax return with its U.S. subsidiaries. Ambac and its subsidiaries also file separate or combined 
income tax returns in various states, local and foreign jurisdictions. As of December 31, 2017 Ambac had a U.S.  loss carryforwards totaling 
$3,694,844, which, if not utilized, will begin expiring in 2029, and will fully expire in 2032.  The NOL allocable to AFG as of December 31, 
2017 is $1,412,639.

Pursuant to the Amended TSA, to the extent Ambac Assurance generated taxable income after September 30, 2011, which offset the allocated 
$3,650,000 of NOLs, (or the proportionate amount of AMT NOL (as defined)), it is obligated to make payments (“Tolling Payments”), subject 
to certain credits, to the Registrant in accordance with a four Tier, A through D, NOL usage table. NOLs in excess of the allocated $3,650,000
may be utilized beginning in 2016, subject to the Registrant's consent, not to be unreasonably withheld, for a payment of 25% of the benefit 
received. 

Ambac Assurance has utilized all of its current post determination date NOLs generated from September 30, 2011 through December 31, 2017
(post determination date NOLs); however, additional post determination date NOLs may be generated in the future.  During this time period, 
Ambac Assurance's cumulative net taxable income was approximately $1,367,795, which utilized all of the $479,000 allocated Tier A NOL 
and $888,795 of the $1,057,000 allocated Tier B NOL and resulted in accrued Tolling Payments, net of applicable credits.  At December 31, 
2017, $30,496 of Tolling Payments are due to Ambac no later than forty-five days after April 15, 2018.  Of the bankruptcy related credits 
available to offset the first $5,000 of payments due under each of the NOL usage Tiers A, B, and C, Ambac Assurance has fully utilized the 
combined $10,000 of Tier A and Tier B credits.

| Ambac Financial Group, Inc.   168   2017 FORM 10-K |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES
SCHEDULE IV— REINSURANCE
Years Ended December 31, 2017, 2016 and 2015

Insurance Premiums Written
($ in Thousands)

Gross
Amount

Ceded to Other
Companies

Assumed from
Other
Companies

Net
Amount

Percentage of
Amount
Assumed to
Net

Year Ended December 31, 2017

$

(14,313) $

(2,104) $

— $

(12,209)

—%

Year Ended December 31, 2016

(53,837)

(8,772) $

Year Ended December 31, 2015

(37,572)

(3,001)

—

—

(45,065)

—%

(34,571)

—%

| Ambac Financial Group, Inc.   169   2017 FORM 10-K |

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has caused this report to be signed 
on its behalf by the undersigned, thereunto duly authorized.

AMBAC FINANCIAL GROUP, INC.

SIGNATURES

Dated: February 28, 2018

By:

/S/ DAVID TRICK
David Trick
Executive Vice President and Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of 
the Registrant and in the capacities and on the dates indicated. 

Signature

Title

Date

/S/ JEFFREY S. STEIN*

Chairman of the Board and Director

February 28, 2018

Jeffrey S. Stein

/S/ CLAUDE LEBLANC

President, Chief Executive Officer and Director

February 28, 2018

Claude LeBlanc

(Principal Executive Officer)

/S/ DAVID TRICK

Executive Vice President and Chief Financial Officer

February 28, 2018

David Trick

(Principal Financial Officer)

/S/ ROBERT B. EISMAN

Senior Managing Director and Chief Accounting Officer

February 28, 2018

Robert B. Eisman

(Principal Accounting Officer)

/S/ ALEXANDER D. GREENE*

Director

February 28, 2018

Alexander D. Greene

/S/ IAN D. HAFT*

Director

Ian D. Haft

/S/ DAVID L. HERZOG*

Director

David L. Herzog

February 28, 2018

February 28, 2018

/S/ C. JAMES PRIEUR*

Director

February 28, 2018

C. James Prieur

/S/ STEPHEN M. KSENAK

*By: Stephen M. Ksenak

Attorney-in-fact

February 28, 2018

| Ambac Financial Group, Inc.   170   2017 FORM 10-K |

Appendix A

Non-GAAP Financial Measures

Ambac reports two non-GAAP financial measures: Adjusted Earnings and Adjusted Book Value. A non-GAAP financial measure is a numerical 
measure of financial performance or financial position that excludes (or includes) amounts that are included in (or excluded from) the most 
directly comparable measure calculated and presented in accordance with GAAP. We are presenting these non-GAAP financial measures 
because they provide greater transparency and enhanced visibility into the underlying drivers of our business. Adjusted Earnings and Adjusted 
Book Value are not substitutes for the Company’s GAAP reporting, should not be viewed in isolation and may differ from similar reporting 
provided by other companies, which may define non-GAAP measures differently. Below are reconciliations of net income (loss) attributable 
to common shareholders to the non-GAAP measure of Adjusted Earnings (Losses) and Total Ambac Financial Group, Inc. stockholders’ equity 
per share ("Book Value") to the non-GAAP measure of Adjusted Book Value per share.  Each of the reconciling items is more fully defined 
in our 2017 Annual Report on Form 10-K within Management's Discussion and Analysis of Financial Condition and Results of Operations 
under the heading “Non-GAAP Financial Measures."

Ambac has a significant U.S. tax net operating loss ("NOL") that is offset by a full valuation allowance in the GAAP consolidated financial 
statements.  As a result of this and other considerations, for purposes of non-GAAP measures, we utilized a 0% effective tax rate; which is 
subject to change.

Adjusted Earnings (Loss) ($ in millions)

May-June
2013

Year Ended December 31,

2014

2015

2016

Net income (loss) attributable to common shareholders

$

505

$

484 $

493 $

75 $

Adjustments:

Non-credit impairment fair value (gain) loss on credit derivatives

Insurance intangible amortization

Impairment of goodwill
Foreign exchange (gains) losses (1)

Fair value (gain) loss on interest rate derivatives from Ambac CVA

(166)

100

—

(24)

47

(17)

152

—

34

(16)

(37)

170

515

27

(14)

(8)

175

—

39

34

2017

(329)

(11)

151

—

(21)

45

Adjusted earnings (loss) (2)

$

462

$

637 $

1,154 $

315 $

(165)

Book Value Per Share / Adjusted Book Value Per Share

June 30,
2013

December 31,

2013

2014

2015

2016

Total AFGI Stockholders' Equity per share

$

6.38

$

15.62 $

31.09 $

37.41 $

37.94 $

Adjustments:

Non-credit impairment fair value losses on credit derivatives

Insurance intangible asset and goodwill

Ambac CVA on interest rate derivative liabilities

Net unearned premiums and fees in excess of expected losses

Net unrealized investment (gains) losses in Accumulated Other

Comprehensive Income
Adjusted book value per share (2)

4.19

(47.46)

(1.44)

40.08

2.02

3.77

$

1.62

(46.94)

(1.08)

38.17

1.24

(42.78)

(1.43)

31.57

0.42

(26.91)

(1.75)

20.11

0.25

(21.30)

(0.99)

16.21

0.93

(4.68)

(1.13)

(2.63)

$

8.32 $

15.01 $

28.15 $

29.48 $

2017

30.52

0.01

(18.71)

—

13.20

(0.68)

24.34

(1)  Elimination of the foreign exchange gains (losses) on the re-measurement of assets, liabilities and transactions in non-functional currencies.  For periods 
prior to 2016, we eliminated the foreign exchange gains (losses) on the re-measurement of net premium receivables and loss and loss expense reserves in 
non-functional currencies.  Given the long-duration of a significant portion of these premium receivables and loss reserves, the foreign exchange re-
measurement gains (losses) are not necessarily indicative of the total foreign exchange gains (losses) that Ambac will ultimately recognize.  Beginning 
in 2016, we have eliminated the foreign exchange gains (losses)  on all assets, liabilities and transactions in non-functional currencies.  Expanding this 
adjustment to include all foreign exchange gains (losses) enables users of our financial statement to better view the business results without the impact of 
fluctuations  in  foreign  currency  exchange  rates,  particularly  as  assets  held  in  non-functional  currencies  have  grown,  and  facilitates  period-to-period 
comparisons of Ambac's operating performance.  Note that we have not recast prior period adjustment to conform to the methodology as such amounts 
were not material.

(2)  Totals may not add due to rounding differences.

[ THIS PAGE INTENTIONALLY LEFT BLANK ]

CORPORATE INFORMATION

Corporate Office
Ambac Financial Group, Inc.
One State Street Plaza
New York, NY 10004
212-658-7470
www.ambac.com

Investor Relations
Lisa A. Kampf
Managing Director, Investor Relations
Ambac Financial Group, Inc.
212-208-3222
ir@ambac.com

Common Stock Listing
The common stock of Ambac  
Financial Group, Inc. trades on  
the NASDAQ Global Select Market  
under the symbol “AMBC”.

Independent Registered  
Public Accounting Firm
KPMG, LLP
345 Park Avenue
New York, NY 10154

Annual Meeting of Stockholders
The Annual Meeting of Stockholders 
will be held on Friday, May 18, 2018,  
at 11:00 am Eastern Time at our  
executive offices, One State Street 
Plaza, New York, NY 10004.

Investor Services/Transfer Agent 
COMPUTERSHARE 
P.O. BOX 505000
Louisville, KY, 40233
Inside the USA call 1-800-662-7232
Outside the USA call 1-781-575-4238                                                                                  
Hearing impaired call 1-800-952-9245
www.computershare.com/investor

or overnight correspondence  
can be sent to:

COMPUTERSHARE 
462 South 4th Street, Suite 1600
Louisville, KY, 40202

Corporate Governance
Ambac is committed to maintaining  
the independence of Ambac’s  
Board of Directors and its committees 
and the integrity of its corporate  
governance processes. Our Corporate 
Governance Guidelines, Code of  
Business Conduct and charters that 
govern our Board committees, all  
of which are designed to keep Ambac 
accountable to its shareholders,  
can be found at  
http://ir.ambac.com/governance.cfm.

Officer Certifications 
The certifications of Ambac’s Chief 
Executive Officer and Chief Financial 
Officer, required under Section 302 of 
the Sarbanes-Oxley Act of 2002, have 
been filed as exhibits to Ambac’s 2017 
Annual Report on Form 10-K. 

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AMBAC FINANCIAL GROUP, INC.
One State Street Plaza, New York, NY 10004

www.ambac.com