Canada's main stock index edges higher, Canadian dollar down

TORONTO -- Canada's main stock index was up marginally Tuesday morning, with gains coming from a number of sectors. The S&P/TSX composite index was up 40.37 points at 16,559.25 in late morning trading. In New York, the Dow Jones industrial average was up 92.19 points at 27,264.09. The S&P 500 index was up 8.44 points at 2,993.47, while the Nasdaq composite was up 12.8 points at 8,216.94. The Canadian dollar traded at 76.11 cents US, down from an average of 76.32 cents US on Monday. The S