May 31 (Reuters) - Canada’s main stock index hit a fresh record high on Monday and was on course for its fourth straight month of gains as a jump in oil prices lifted energy stocks. * At 9:30 a.m. ET (13:30 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 52.37 points, or 0.26%, at 19,904.55. (Reporting by Sruthi Shankar in Bengaluru, Editing by Rosalba O’Brien) Our Standards: The Thomson Reuters Trust Principles.