Wall St ends down

U.S shares closed down amid global concerns; Dow Jones Industrial Average dropping 78.48 points, or 0.60 per cent at 13,046.14.
The S&P 500 slid 10.11 points, or 0.72 per cent at 1,392.78.
Most key S&P sectors finished in the red, led by energy and materials,while consumer staples managed to gain.
Nasdaq composite fell 12 points, or 0.39 per cent to end at 3,063.32.