Men leave the New York Stock Exchange after the closing bell in New York, Monday, Oct. 6, 2008. Wall Street suffered through another extraordinary and traumatic session Monday, with the Dow Jones industrials plunging as much as 800 points _ their largest one-day point drop _ before recovering to close with a loss of 370. (AP Photo/Seth Wenig)

NEW YORK (AP) — Wall Street joined in a worldwide cascade of despair Monday over the financial crisis, driving the Dow Jones industrials to their biggest loss ever during a trading day. Even a big afternoon rally failed to keep the Dow from its first close below 10,000 since 2004.

The sell-off came despite the $700 billion U.S. government bailout package, which was signed into law Friday after two weeks in which traders had appeared to count on the rescue as their only hope to avoid a market meltdown.

At its worst point, the Dow was down more than 800 points, an intraday record. The stock market rallied during the final 90 minutes of the trading day, and the Dow finished down about 370 points at 9,955.50.

The average is down almost 30 percent from its all-time high of 14,164.53, set a year ago Thursday.