Wall St ends flat

US shares wiped most gains to close flat following reports that former Greek Prime
said preparations for Greece's exit from euro zone are being considered.
Dow Jones Industrial Average erased 1.67 points, or 0.01 per cent at 12,502.81.
S&P 500 managed to gain 0.64 points, or 0.05 per cent at 1,316.63, whiel Nasdaq
composite fell 8.13 points, or 0.29 per cent at 2,839.08.