Ambac's Insurance Unit Cut to AA From AAA by Fitch Ratings
The seven AAA rated bond insurers place their stamp on $2.4 trillion of debt. Losing those rankings may cost borrowers and investors as much as $200 billion, according to data compiled by Bloomberg. The industry guaranteed $100 billion of collateralized debt obligations linked to subprime mortgages, $22 billion of non-prime auto loans and $1.2 trillion of municipal debt.