Too Big to Fail: The Inside Story of How Wall Street and Washington Fought to Save the Financial System from Crisis — and Themselves

by Andrew Ross Sorkin

As the company had warned in an SEC filing several weeks earlier, a downgrade would be very expensive. If either Standard & Poor’s or Moody’s lowered its rating by one notch, AIG would be required to post $10.5 billion in additional collateral; if both agencies lowered their ratings, the damage would soar to $13.3 billion. As part of its contract to sell credit default swaps, AIG was required to maintain certain credit ratings—or add new collateral to compensate—as insurance against its potential inability to pay out any claims on the swaps. AIG was now a AA-minus company, and it was facing a tab that was growing quickly. Its executives were estimating that the firm could soon be hit with demands for as much as $18 billion in additional collateral.