Ambac’s Executives to Present at Banc of America Bond Insurance Mini Conference

NEW YORK.- Ambac Financial Group, Inc. (NYSE: ABK) (Ambac) announced today that Sean Leonard, Ambac’s Senior Vice President and Chief Financial Officer and David Wallis, Ambac’s Senior Managing Director and Head of Portfolio Risk Management, will present at the Bond Insurance Mini Conference hosted by Banc of America on Tuesday, November 27, 2007 at 8:45 a.m. (Eastern) in New York City.

The presentation will be broadcast live from Ambac’s website and a replay will be available after the presentation until December 14, 2007. The link is:

http://www.veracast.com/webcasts/bas/bondinsurers07/id77102185.cfm