Wall St ends flat

U.S. stocks closed flat overnight as investors monitor developments of Greek debt negotiations
The Dow Jones Industrial Average slipped 11.66 points, or 0.09 per cent, to close at 12,708.82, ending its 4-day rally.
The S&P 500 added 0.62 points, or 0.05 per cent, to close at 13,16.00. Among key S&P sectors, energy gained, while telecoms lagged.
The Nasdaq declined 2.53 points, or 0.09 percent, to end at 2,784.17.