April 8 (Reuters) - Canada’s main stock index opened higher on Thursday as investors bet on a faster global economic rebound, while a jump in gold and copper prices helped mining stocks. * At 9:30 a.m. ET (1330 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 31.46 points, or 0.16%, at 19,160.53. (Reporting by Shashank Nayar in Bengaluru; Editing by Maju Samuel)