Stock Index Futures Edge Down

March SP500 is trading at 2255.50, down 3.25 March Nasdaq 100 is trading at 4925.00, down 11.50 . March Russell 2000 is trading at 1365.0, up 1.9. March Dow Industrial futures are trading at 19851, down 22. Stock index futures have drifted lower and are trading a little above the session lows in a rangebound fashion. .