Wall St ends down
Dow Jones Industrial Average closed down 42.47 points, or 0.30 per cent at 13,944.05,
S&P 500 erased 2.73 points, or 0.18 per cent to close at 1,509.39.
Most key S&P sectors finished lower, led by materials and energy.
Nasdaq fell 3.35 points, or 0.11 per cent at 3,165.13.