Wall St ends lower

U.S. stocks closed lower led by materials and energy shares, amid concerns over global economy.
All three major indexes fell 1 per cent across the board.
The Dow Jones Industrial Average slumped 71.52 points, or 0.54 per cent, to close at 13,126.21
The S&P 500 declined 6.98 points, or 0.49 percent, to end at 1,405.54.
Most of the key S&P sectors closed lower, led by materials and energy, while financial shares sneak into positive territory
The Nasdaq fell 15.39 points, or 0.49 per cent, to close at 3,104.96.