Stock Index Futures Extend Losses

March SP500 is trading at 2255.50, down 11.00. March Nasdaq 100 is trading at 5043.50, down 11.00. March Russell 2000 is trading at 1342.80, down 14.70. March Dow Industrial futures are trading at 19640, down 95. Stock index futures are trading choppy and at the session lows.