Traders work on the floor of the New York Stock Exchange, March 18, 2009. The Nasdaq and the S&P 500 shot up more than 1 percent on Wednesday, while the Dow Industrials turned positive, after the Federal Reserve said after its policy meeting it will buy long-term U.S. Treasuries in its push to revive the recession-hit economy. REUTERS/Brendan McDermid (UNITED STATES)