Oil prices tumbled below the $49 per barrel mark, giving investors hope that crude, which climbed steadily through October, could be stabilizing. A barrel of light crude was quoted at $48.82, down $2.06, on the New York Mercantile Exchange — the lowest settlement price since Sept. 29.

"I think oil has a lot to do with it," said Michael Palazzi, managing director of equity trading at SG Cowen Securities. "There are some technicals here that have come through as well, but oil is a huge part of this rally."

According to preliminary calculations, the Dow Jones industrial average rose 177.71, or 1.75 percent, to 10,314.76, adding to a 101-point gain yesterday. It was the biggest one-day point gain for the Dow since Oct. 1, 2003, and its best close since Sept. 14.

Broader stock indicators were strongly higher. The Standard & Poor's 500 index was up 18.47, or 1.62 percent, at 1,161.67, its highest closing level since March 19, 2002.

The Nasdaq composite index gained 19.30, or 0.96 percent, to 2,023.63, its highest close since June 30.

The Dow has posted gains in seven of the last eight sessions, climbing 5.79 percent since Oct. 25. The Nasdaq has gained 5.73 percent and the S&P 500 climbed 6.11 percent over the same time period, and both indexes enjoyed their eighth straight positive session.

Whether the rally will continue will likely depend on whether tomorow's job creation report from the Labor Department shows strong employment gains. The Federal Reserve meeting next Wednesday — which will likely result in a quarter percentage point hike in interest rates — is also expected to move the market.

"I think there's a potential here to break out of the gentle downward trend we've seen since April," said Rod Smyth, chief investment strategist at Wachovia Securities. "We're now back to the issues that are more likely to dominate, which is Fed policy and oil prices and prospects for inflation, those kind of things."

In perhaps a positive precursor to tomorrow's jobs report, the Labor Department said first-time unemployment claims fell to 332,000 last week, down 19,000 from the previous week — a better showing than Wall Street had expected.

However, the nation's productivity rose by only 1.9 percent in the third quarter, the smallest gain since late 2002 and far less than the brisk 3.9 percent pace in the second quarter, according to the Labor Department.