LOUSY END: The Dow Jones industrial average lost 276 points, its biggest loss since Sept. 22, to end at 11,955. Much of the decline came in the last hour of trading.
BIG OCTOBER: Even with the lousy showing on the last day of October, the Dow still had its best month since October 2002. The S&P 500 index had its best month since December 1991.
EURO INFECTION?: MF Global, a securities firm headed by former Goldman Sachs chairman Jon Corzine, filed for bankruptcy protection. The company's debt was downgraded and its business partners pulled back over concerns about its holdings of European debt.