March 26 (Reuters) - Canada's main stock index gained at the open on Tuesday with energy stocks leading the gains, as oil prices rose towards $68 on OPEC supply cuts and expectations of lower U.S. inventories.
* At 9:30 am ET (1330 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was up 89.09 points, or 0.55 percent, at 16,154.95.