May 1 (Reuters) - Canada's main stock index edged up at open on Monday, aided by gains in materials stocks, while investor caution loomed ahead of major central bank meets this week.
At 9:31 a.m. ET (13:31 GMT), the Toronto Stock Exchange's S&P/TSX composite index (.GSPTSE) was up 66.31 points, or 0.32%, at 20,702.85.
Reporting by Johann M Cherian in Bengaluru; Editing by Krishna Chandra Eluri