Assured Guaranty Ltd. Board of Directors Appoints Two New Members, Robin Monro-Davies and Michael T. O'Kane.

HAMILTON, Bermuda -- Assured Guaranty Ltd. (NYSE:AGO) announced today that Robin Monro-Davies and Michael T. O'Kane have been appointed to the Company's Board of Directors effective as of August 3, 2005. Their election increases the number of directors to nine. Mr. Monro-Davies will serve on the Company's Nominating and Governance Committee and its Risk Oversight Committee. Mr. O'Kane will serve as a member of both the Audit and Finance committees.

Dominic Frederico, President and Chief Executive Officer of Assured Guaranty Ltd. commented, "We are pleased to announce the addition of Robin and Michael to our Board. Their vast experience and knowledge of the financial markets will provide management with additional guidance as we further develop Assured Guaranty's financial guaranty presence."

Mr. Monro-Davies is currently a board member of AXA UK and AXA Asia Pacific Holdings, a director of HSBC Bank plc, Chairman of MergerMarket and is a member of the Board of Directors of Assured Guaranty (UK) Ltd. From 1997 until his retirement in 2001, he was Chief Executive Officer of Fitch Ratings, the world's third largest rating agency.

Until his retirement, Mr. O'Kane was employed at TIAA-CREF in a number of different capacities since 1986. He was most recently Senior Managing Director, Securities Division, responsible for a significant portion of TIAA-CREF's $300 billion in assets under management.

Assured Guaranty Ltd. is a Bermuda-based holding company. Its operating subsidiaries provide credit enhancement products to the U.S. and international public finance, structured finance and mortgage markets. More information can be found at http://www.assuredguaranty.com.