A combination of falling oil prices, a rallying dollar and a hint by the Federal Reserve of more financial support for banks and brokerages was enough Tuesday to stir a little fear in the stomachs of Wall Street's bears.
Stocks surged in the final two hours of very heavy trading, lifting broad market indexes to their best gains in at least a month. The rally had the scent of "short covering" -- buying by traders who were closing out previous bearish bets.
The Standard & Poor's 500 index jumped 21.39 points, or 1.7%, to 1,273.70, its biggest advance since it rose nearly 2% on June 5. The Nasdaq composite gained 51.12 points, or 2.3%, to 2,294.44.
The Dow Jones industrials added 152.25 points, or 1.4%, to 11,384.21.
Crude oil slid for a second day, and the difference Tuesday was that investors seemed to believe that the turnabout might have some legs. Crude futures in New York were off $5.33 to $136.04 a barrel, pushed down in part by a rebound in the dollar. (A stronger greenback can lure traders away from commodities.)
The dollar, in turn, got a boost from a wide-ranging speech Tuesday morning by Fed Chairman Ben S. Bernanke, in which he laid out the central bank's plan for strengthening financial industry regulation.
More pertinent for markets at the moment, Bernanke also said the Fed was looking at extending its emergency lending program to major securities firms into 2009, if needed. The program was put in place in mid-March, after the collapse of brokerage Bear Stearns Cos., to give securities firms a borrowing option if their peers on Wall Street cut them off.
The Fed had intended to end the special lending program in mid-September. But this obviously isn't a "mission accomplished" situation for Bernanke & Co. quite yet.
Battered financial stocks led Tuesday's rebound after their latest trouncing Monday. An index of 89 financial issues in the S&P 500 jumped 5.7%.
Bank of America surged $2.01, or 9.3%, to $23.54. Lehman Bros. Holdings rose $1.43, or 6.9%, to $22.27.
Financial issues have been heavily shorted by Wall Street's bears. In a short sale a trader borrows stock and sells it, expecting to repay the loan later with new shares bought at a lower price.
With financial stocks down drastically in the last month -- and with the news a little less grim for at least a day -- it made sense for some shorts to close out their trades by buying back the stocks, said Joe Saluzzi, a principal at Themis Trading in Chatham, N.J.