Stocks staged a big negative reversal Wednesday, selling off into the close. Selling intensified after the Fed’s policy statement, despite no big surprises in the latest remarks. The Nasdaq reversed from an early 1.3% gain to finish down 0.9%. The S&P 500 lost 1.3% and the Dow Jones industrial average fell 1.1%. According to preliminary numbers, volume rose across the board in the stock market today.