NEW YORK, Jan. 18 -- Ambac Financial Group, the nation's second largest insurer of bonds, lost its precious AAA rating from Fitch Ratings on Friday over concerns that the company no longer had enough capital to guarantee billions of dollars in debt now imperiled by the subprime mortgage crisis. -
Insurer Of Bonds Loses Top Rating
NEW YORK, Jan. 18 -- Ambac Financial Group, the nation's second largest insurer of bonds, lost its precious AAA rating from Fitch Ratings on Friday over concerns that the company no longer had enough capital to guarantee billions of dollars in debt now imperiled by the subprime mortgage crisis.-
By Tomoeh Murakami Tse