June 21 (Reuters) - Canada’s main stock index opened higher on Monday, helped by gains in energy and mining stocks, bouncing back from last week’s losses that were triggered by a hawkish U.S. Federal Reserve. * At 09:32 a.m. ET (1332 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 76.92 points, or 0.38%, at 20,076.51. (Reporting by Amal S in Bengaluru; Editing by Maju Samuel) Our Standards: The Thomson Reuters Trust Principles.