Canada’s main stock index inched higher at open on Tuesday, aided by gains in technology and energy shares, while investors remained cautious ahead of a reading on U.S. inflation later this week. At 9:33 a.m. ET (14:33 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 20.87 points, or 0.1%, at 21,577.41. (Reporting by Amal S in Bengaluru; Editing by Anil D’Silva)