NEW YORK (AP) — The stock market took another nosedive Wednesday as the American banking system appeared even shakier and investors worried that the financial crisis is spinning so far out of control that even government rescues can't stop it.

The Dow Jones industrial average, which only two days earlier had suffered its steepest drop since the days after the Sept. 11 attacks, lost another 450 points. About $700 billion in investments vanished.

One day after the Federal Reserve stepped in with an emergency loan to keep American International Group Inc., one of the world's largest insurers, from going under, Wall Street wondered which companies might be the next to falter.

WASHINGTON (AP) — The U.S. government has agreed to provide an $85 billion emergency loan to rescue the huge insurer AIG, the The Federal Reserve said Tuesday.

The Fed said the U.S. Treasury Department was in full support of the decision.

The Fed determined that a "disorderly failure" of AIG could undermine already fragile financial markets.

The government will receive an 79.9 percent equity stake in AIG, the Fed said

NEW YORK (AP) — Wall Street began the fourth quarter with a huge rally Monday, sending the Dow Jones industrial average to a record close. Stocks were buoyed by a growing belief that the worst of the credit crisis has passed.

The Dow rose 191.92, or 1.38 percent, to 14,087.55, surpassing its closing record of 14,000.41 set in mid-July. The blue chip index rose as high as 14,115.51 to eclipse its previous intraday high of 14,021.95 set July 17.