Wall St ends flat

U.S. stocks closed flat amid unexpected drop in pending home sales in October and an agreement by Iran to limit its nuclear program.
The Dow Jones Industrial Average retained slight gain to closed at a record, up 7.77 points, or 0.1 per cent at 16,072.54.
S&P 500 fell 2.28 points, or 0.1 per cent at 1,802.48; with energy and materials leading the fall among its 10 major sectors.
Nasdaq composite added 2.92 points, or 0.1 per cent at 3,994.57.