Stocks turned negative on Monday after American Express Co said the number of people having trouble making credit card payments rose in February.

The Dow Jones industrial average <.DJI> slipped 10.91 points, or 0.15 percent, to 7,213.07. The Standard & Poor's 500 Index <.SPX> fell 2.40 points, or 0.32 percent, to 754.15. The Nasdaq Composite Index <.IXIC> dropped 27.54 points, or 1.92 percent, to 1,403.96.

(Editing by Jan Paschal)