US STOCKS-Futures drop on worries over economy

DJc1 dropped 40 points, and Nasdaq 100 futures NDc1 lost 7.5 points. General Motors Co (GM.N Whole Foods Market Inc's (WFMI.O Electronic Arts Inc (ERTS.O Investors awaited company results from Kraft Foods Inc (KFT.N Through Wednesday, with 386 of the S&P...