TORONTO, May 27 (Reuters) - Toronto's main stock index edged higher at the open on Friday as higher commodity prices pushed up resource issues, but gains were limited by Royal Bank of Canada (RY.TO), which reported weaker-than-expected earnings.
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE opened 5.83 points higher at 13,781.73. Seven of its sectors advanced, including the energy and materials groups.
But the financial group was off 0.6 percent, partly because of a 2.4 percent drop in Royal shares. [ID:nN27293256] (Reporting by Ka Yan Ng; editing by Peter Galloway)