Bill Ackman Was Right: MBIA, Ambac on `Ratings Cliff'

By Christine Richard

June 18 (Bloomberg) -- Bill Ackman was right: the world's largest bond insurers aren't worthy of a AAA credit rating and may be headed for the bottom of the scale.

Ackman, the 42-year-old hedge fund manager who says he stands to make hundreds of millions of dollars betting against MBIA Inc. and Ambac Financial Group Inc. if they go bankrupt, will tell investors at a conference in New York today that losses posted by bond insurers may threaten to breach the capital limits allowed by regulators, making them insolvent.