ABK Ambac Financial Grp. Common Stock

Ambac Financial Group, Inc. (NYSE: ABK) (�Ambac�) announced today that International Securitisation Report (ISR) has named Ambac Monoline Insurer of the Year. The award is based on Ambac�s strong global presence and its role in a number of ground-breaking transactions in 2007, as well as from the results of ISR�s online poll. �Ambac is honored to receive this award,� said Douglas Renfield-Miller, Executive Vice President of Ambac and Chairman of Ambac UK Limited. �Ambac has had an active year closing many noteworthy transactions. This award underscores the company�s ability to use our in-depth knowledge and expertise to help issuers and financial advisors structure innovative transactions across a diverse range of asset classes and jurisdictions.� In 2007, Ambac was sole guarantor of award-winning deals Theatre Hospitals 1&2 (CMBS Deal of the Year - Europe) and Punch Taverns Finance (Corporate Deal of the Year - Europe). It also participated in Channel Link Enterprises Finance (Deal of the Year - Europe) and Airspeed (ABS Deal of the Year - Europe). Ambac Financial Group, Inc., headquartered in New York City, is a holding company whose affiliates provide financial guarantees and financial services to clients in both the public and private sectors around the world. Ambac�s principal operating subsidiary, Ambac Assurance Corporation, a leading guarantor of public finance and structured finance obligations, has earned triple-A ratings, the highest ratings available from Moody�s Investors Service, Inc., Standard & Poor�s Ratings Services and Fitch, Inc. Ambac Financial Group, Inc. common stock is listed on the New York Stock Exchange (ticker symbol ABK).