Wall Street opens lower on China concerns

US stocks opened lower on Friday, with investors concerned over reports of a regulatory crackdown on over-the-counter margin trading in China, a move that potentially would be negative for a recent flow of money into Chinese exchanges.

The Dow Jones industrial average .DJI fell 113.71 points, or 0.63 per cent, to 17,992.06, the S&P 500 .SPX lost 10.3 points, or 0.49 per cent, to 2,094.69 and the Nasdaq Composite .IXIC dropped 42.52 points, or 0.85 per cent, to 4,965.27.