Stocks tumbled in early trading on Wall Street on Wednesday after the Federal Reserve said the U.S. economic rebound slowed in recent months, adding to concerns about the health of the U.S. economy. Major indexes cut losses in late trading Tuesday after the Fed said it will use the proceeds from its investments in mortgage bonds to buy government debt on a small scale. The stimulus plan could help send long term rates on mortgages and corporate debt slightly lower. However, the Fed took a much more cautious view of the recovery by admitting it was weaker than previous anticipated. Wednesday's data continued to pressure the market as the U.S. trade deficit unexpectedly widened in June to its highest level since October 2008. The Dow Jones industrial average tumbled 193.90 points, or 1.82 percent, to 10,450.35. The Standard & Poor's 500 index sank 22.45 points, or 2.00 percent, to 1,098.61 and the Nasdaq plummeted 52.68 points, or 2.31 percent, to 2,224.49. 