TORONTO — Strength in the energy sector helped Canada’s main stock index gain more than 100 points in late-morning trading, while U.S. stock markets were mixed. The S&P/TSX composite index was up 127.03 points at 24,680.43. In New York, the Dow Jones industrial average was up 251.34 points at 41,739.53. The S&P 500 index was […]