* Global efforts to stabilize banks calm markets
* Morgan Stanley jumps after news of stake purchase
* GM rises on news it had merger talks with Chrysler
* Dow up 6.2 pct, S&P up 6.2 pct, Nasdaq up 6.3 percent (Updates to early afternoon, changes byline)
By Kristina Cooke
NEW YORK, Oct 13 (Reuters) - U.S. stocks surged on Monday, following their worst week ever, as global efforts to recapitalize banks sparked a rally in financial shares, while credit markets showed some signs of loosening up.
Stocks were headed for their biggest percentage gain in a single day since two days after the Black Monday crash of October 1987.
Morgan Stanley <MS.N> was among the biggest percentage gainers on the S&P 500, soaring more than 70 percent, after Japan's Mitsubishi UFJ Financial Group <8306.T> said it paid $9 billion for a 21 percent stake in the firm. For details see [
].Wachovia <WB.N> climbed 2.3 percent after the Federal Reserve approved the $12.46 billion takeover of the U.S. bank by Wells Fargo & Co <WFC.N>.
Led by Britain, European governments agreed to multibillion-dollar guarantees for the banking system in moves that may become a crucial test of investor faith in government's ability to reverse the downward spiral.
The U.S. Federal Reserve, the European Central Bank, the Bank of England and the Swiss National Bank also said they would lend commercial banks as much U.S. dollar liquidity as they needed to ease clogged interbank lending rates. The S&P financial index <.GSPF> rose 4.2 percent.
"The crucial issue for the market has been a lack of confidence and the most recent efforts to ease the credit crunch by governments and central banks have been very positive in terms of building confidence," said Subodh Kumar, chief investment strategist at Subodh Kumar & Associates in Toronto.
The Dow Jones industrial average <
> jumped 523.53 points, or 6.20 percent, to 8,974.72. The Standard & Poor's 500 Index <.SPX> soared 55.74 points, or 6.20 percent, to 954.96. The Nasdaq Composite Index < > was up 104.37 points, or 6.33 percent, at 1,753.88.General Motors <GM.N> jumped 28 percent to $6.25 after reports that the automaker has been in merger talks with rivals Chrysler LLC and Ford Motor Co <F.N>, whose shares surged 20.6 percent to $2.40. [
].Defensive and consumer staples stocks rose as investors picked up shares in companies generally considered better positioned to weather an economic downturn. Johnson & Johnson <JNJ.N> rose 9 percent to $60.87.
Among tech shares, Apple Inc <AAPL.O> was up 6.4 percent at $103, after Citigroup raised its recommendation on the U.S. technology hardware and equipment sector to "market weight" from "underweight." Microsoft <MSFT.O> gained 11 percent to $23.88.
Energy companies tracked the price of oil higher. Crude oil rose $3.68 to $81.38 a barrel on optimism over the governments' moves to shore up confidence in the banking system. Exxon Mobil <XOM.N> gained 6.2 percent to $66.25, and Chevron <CVX.N> climbed 7.6 percent to $62.20.
Morgan Stanley shares spiked 74.5 percent to $16.88, while those of Wachovia rose 2.3 percent to $5.27.
The optimism over bank rescues, however, was tempered by a U.S. bank sector downgrade by Citigroup. JPMorgan <JPM.N> shares fell 4.1 percent to $39.99.
Wall Street fell for an eighth straight session on Friday, as investors feared the credit crisis was spiraling out of control and the global economy was threatened by deep recession.
In a sign that credit markets may be loosening up, the cost for banks to borrow dollars, sterling and euros from each other over three months fell. [
]. (Reporting by Kristina Cooke; Editing by Jan Paschal)