Stock Index Futures Erase Gains

March SP500 is trading at 2257.00, down 4.00. March Nasdaq 100 is trading at 4951.00, down 10.25. March Russell 2000 is trading at 1370.70, down 4.0. March Dow Industrial futures are trading at 19874, down 3. Stock index futures are trading choppy and have erased the early session gains.