NEW YORK (AP) — Wall Street stormed back from last week's devastating losses today, sending the Dow Jones industrials soaring a nearly inconceivable 936 points after major governments' plans to support the global banking system reassured distraught investors.

All the major indexes rose more than 11 percent.

The market was expected to rebound after eight days of precipitous losses that took the Dow down nearly 2,400 points, but few expected this kind of advance, which saw the Dow by far outstrip its previous record one-day point gain, 499.19, set during the waning days of the dot-com boom. The Standard & Poor's 500 index also set a record for a one-day point gains.

There were cheers and applause on the floor of the New York Stock Exchange at the closing bell, and trading was so active that prices were still being computed several minutes after the closing bell, longer than it would take on a quieter day.

Still, while the magnitude of today's gains stunned investors and analysts, few were ready to say Wall Street had reached a bottom. The market is likely to have back-and-forth trading in the coming days and weeks — and may well see a pullback when trading resumes Tuesday — as investors work through their concerns about the banking sector, the stagnant credit markets and the overall economy.

John Lynch, chief market analyst for Evergreen Investments in Charlotte, N.C., said today's rally was encouraging but he doubted it signaled the worst has passed.

"My screen is completely green and I love that, but I'm not doing any backflips yet. We still have many challenges up ahead," Lynch said, noting the ongoing strains in credit markets and forecasts for poor corporate earnings for 2009.

Denis Amato, chief investment officer at Ancora Advisors, said it's too soon to say whether the market has started to carve out a bottom and that the credit markets where many companies turn for day-to-day loans will need to loosen for stocks to hold their gains. With the U.S. bond markets and banks closed today for Columbus Day, it was difficult for investors to gauge the reaction of the credit markets to actions by major governments.

He said the severity of the selling last week was one possible signal that the market might be nearing a bottom and that the stepped up intervention of the government is a welcome sign for the markets.

"I think we had enough negatives last week that if the government steps in we could have a pretty nice run. Is it off to the races? No, I don't think so. We have a lot of stuff to work through."

The market did appear to take heart when the Bush administration said it is moving quickly to implement its $700 billion rescue program, including consulting with law firms about the mechanics of buying ownership shares in a broad number of banks to help revive the stagnant credit markets and in turn get the economy moving again.

Neel Kashkari, the assistant Treasury secretary who is interim head of the program, said in a speech today officials were also developing guidelines to govern the purchase of soured mortgage-related assets. However, he gave few details about how the program will actually buy bad assets and bank stock.

A relatively tame finish to Friday's session and a weekend off gave analysts and investors some time to reassess last week's tumultuous trading. And stock prices that were decimated by frenetic selling are now looking attractive.

Jim King, chief investment officer at National Penn Investors Trust Co., said the fear that took hold of the markets last week was overwrought and could signal that a bottom is near. When selling turns so frenetic that it hits a broad swath of stocks indiscriminately, as it did last week, many market watchers say a market low is at hand. That creates opporunity, King noted.

"We have exceptional companies at fire sale prices," he said.

Still, King cautioned that any market rebound likely will be choppy.

"Even if this is the beginning of a recovery we're not just going to have up markets from here on in," he said. "We're not through the woods. We think there is collateral damage from this debacle." King pointed to an increase in unemployment and nervousness among consumers that could, for example, hurt retailers and in turn, take stocks lower.

According to preliminary calculations, the Dow rose 936.42, or 11.08 percent, to 9,387.61. The Dow's previous record for a one-day point gain was 499.19, or 4.93 percent, on March 16, 2000.

Broader stock indicators also jumped today. The S&P 500 index advanced 104.13, or 11.58 percent, to 1,003.35; it was the biggest point gain ever for the S&P 500, eclipsing the 66.33, or 4.76 percent, jump it had on March 16, 2000. It was the biggest percentage gain for the index since March 15, 1933, when it surged 16.6 percent.

The Nasdaq rose 194.74, or 11.81 percent, to 1,844.25, its 10th biggest point gain; during the dot-com boom, the index soared as much as 324.83 in one day. Its percentage gain today was second to the 14.2 percent logged Jan. 3, 2001, the same day that the Nasdaq set its record for a one-day point gain.

About 3,030 stocks advanced on the New York Stock Exchange, while only about 160 declined — a reversal from last week, when declining stocks overwhelmed the gainers. But the trading volume of 1.82 billion shares was lighter than it had been last week, suggesting there was less conviction in the buying than during last week's selling.

Lynch described the mood among investors as "relaxed" compared to the hysteria of last week's crushing losses.

Wall Street was cheered by word from the Bank of England that it would use up to $63 billion to help the three largest British banks strengthen their balance sheets.

The Bank of England, the European Central Bank and the Swiss National Bank also jointly announced plans to work together to provide as much short-term funding as necessary to help revive lending.

After a series of weekend meetings in Washington of heads of the Group of Seven nations, the gains in global markets signaled that investors found comfort from the actions and pledges coming from government officials.

The surge in stocks comes after a dismal week on Wall Street that erased an estimated $2.4 trillion in shareholder wealth. The Dow, after eight consecutive daily losses that totaled just under 2,400, or 22.1 percent, finished at its lowest level since April 2003, and also suffered its worst weekly percentage loss ever, a fall of 18.2 percent.

Meanwhile, the S&P 500 and the Nasdaq each lost 15.3 percent last week.

Recoveries from past crashes have taken considerable time. When the market crashed Oct. 19, 1987, sending the Dow down 508 points to 1,738.34, the blue chips had lost 938 points, or 36.1 percent, since reaching a then-record close of 2,722.42 on Aug. 25, 1987. It took just over 15 months for the Dow to get back to its pre-crash level, and almost two years to the day — Aug. 24, 1989 — to reach a new closing high, 2,734.64.

The Dow has an even larger percentage drop to regain this time. By Friday's close, the average had fallen 5,713 points, or 40.3 percent, from its record finish of 14,165.43 a year earlier, on Oct. 9, 2007. More recently, it has had fallen 2,970, or 26 percent, from its close before the Sept. 15 collapse of Lehman Brothers Holdings Inc., the event that triggered the freeze-up in the credit markets and that sent stocks plunging.

Investors have worried that banks' reluctance to lend to one another would imperil economic activity by making it harder and more expensive for businesses and consumers to get a loan. The mid-September bankruptcy of Lehman Brothers Holdings Inc. exposed major fault lines in the credit market as investors lost money on bad debt. That triggered a tightening of lending conditions.

"Everybody is basically waiting on the decision on where they're going to inject cash," Dave Rovelli, managing director of U.S. equity trading at Canaccord Adams in New York, said of Bush administration officials. He said with the bond markets closed, U.S. government officials are likely holding off on announcement of details about where it might invest money until all major global markets are open.

Rovelli said that a sustainable advance on Wall Street could prove elusive.

"Everybody knew that we were going to have an up day eventually," he said, warning that the rally doesn't necessarily signal an end of the market's troubles.

The dollar was mixed against other major currencies, while gold prices fell.

Light, sweet crude rose $3.49 to $81.19 on the New York Mercantile Exchange after oil fell to its lowest level in 13 months last week.

The Russell 2000 index of smaller companies rose 48.41, or 9.27 percent, to 570.89.

Investors in Asia and Europe also grabbed stocks after last week's rout and the weekend moves by governments to bolster investor confidence.

In Asia, Hong Kong's Hang Seng index surged 10.2 percent. Markets in Japan were closed for a holiday. In Europe, Britain's FTSE 100 jumped 8.26 percent, Germany's DAX index rose 11.4 percent, and France's CAC-40 surged 11.2 percent.