Sept 18 (Reuters) - Canada's main stock index opened higher on Tuesday as energy stocks gained tracking oil prices, which rose on signs that OPEC would not be prepared to raise output to address shrinking supplies.
* At 9:30 a.m. ET (13:30 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was up 11.13 points, or 0.07 percent, at 16,093.44.