Dow ends above 8,000 in best 4-week run since 1933

By Edward Krudy

NEW YORK (Reuters) - Stocks rose on Friday, with the Dow marking its best four-week winning streak since 1933, lifted by robust results from Research in Motion and comments by Fed Chairman Ben Bernanke, who said the central bank will do everything it can to stabilize banks.

Growing conviction that the worst is over for the economy helped Wall Street shrug off dour jobs data showing the highest unemployment rate since 1983.

The Nasdaq outperformed other indexes, helped by a 21 percent jump in the U.S.-listed stock of Research in Motion (RIM.TO)(RIMM.O) after the BlackBerry maker, a Canadian company, posted surprisingly strong results on brisk retail demand and gave a rosy outlook after Thursday's closing bell.

"The move into technology reflects investors rotating funds into groups likely to benefit from an economic recovery, even though a turnaround in corporate profits in that sector might still be a few quarters away," said Michael Sheldon, chief market strategist at RDM Financial in Westport, Connecticut.

The Dow Jones industrial average .DJI climbed 39.51 points, or 0.50 percent, to 8,017.59. The Standard & Poor's 500 Index .SPX rose 8.12 points, or 0.97 percent, to 842.50. The Nasdaq Composite Index .IXIC gained 19.24 points, or 1.20 percent, to 1,621.87.

For the week, the Dow rose 3.1 percent, while the S&P 500 advanced 3.3 percent and the Nasdaq jumped 5 percent.

S&P UP NEARLY 25 PERCENT VS. MARCH LOW

At Friday's close, the S&P 500 was up 24.5 percent from a 12-year low set on March 9, helped mainly by growing optimism that the economic slowdown is starting to moderate.

The Dow closed above 8,000 for the first time since February 9 after four straight days of gains.

Research in Motion, a technology bellwether, surged 20.8 percent to $59.29 on the Nasdaq, while IBM (IBM.N) ranked as the Dow's biggest gainer, up 1.4 percent at $102.22 on the New York Stock Exchange. The semiconductor index .SOXX rose 2.9 percent.

Financial stocks rose after Bernanke, the Federal Reserve chairman, said the Fed will use "all of its tools" to stabilize markets.

Citigroup (C.N) advanced 4 percent to $2.85, while Bank of America (BAC.N) added 5 percent to $7.60.

An S&P index of financial companies' stocks .GSPF shot up 4.2 percent. Some analysts said investors may be covering short bets on financial stocks by buying back the shares.

Wall Street received more confirmation about deterioration in the labor market, when data showed the U.S. unemployment rate hit 8.5 percent, the highest level since 1983, as employers cut 663,000 jobs in March.

The numbers, though, were in line with economists' forecasts.