Wall St ends flat

U.S. stocks closed flat in thin trade,but still remained near four-year highs, boosted by technology shares gains.
Dow Jones Industrial Average slid 3.56 points, or 0.03 per cent to end at 13,271.64.
S&P 500 and the Nasdaq both lost less than a point to close at 1,418.13 and 3,076.21, respectively.
Among key S&P sectors, consumer discretionary and telecoms dragged, while techs gained