 Stocks poised to bounce back from a lousy finish to Tuesday trading, when the Dow Jones Industrial Average dropped almost 400 points in the final hour of trading to close near the lows of the day, down 1.6. Shares are down another 5 in premarket trading Wednesday. Futures on the Dow and SP; 500 futures are both about 1.2, while Nasdaq Composite futures have gained 1.1. 