Wall St end lower

U.S. stocks finished lower in volatile trading dragged by industrial shares. 
Dow Jones Industrial Average fell 83.17 points, or 0.65 per cent, to close at 12,653.12,finishing lower for the fourth-straight session.
S&P 500 slumped 10.99 points, or 0.81 per cent to end at 1,341.47.
Most key S&P sectors finished lower, led by industrials and materials, while utilities manged small gains.
Nasdaq composite fell 29.44 points, or 1 per cent at 2,902.33.