July 26 (Reuters) - Canada's main stock index slid on Tuesday, tracking weakness in global markets as investors braced for key earnings reports and a big U.S. interest rate hike this week, while e-commerce giant Shopify dropped on cutting 10% of its workforce.

At 9:30 a.m. ET (1330 GMT), the Toronto Stock Exchange's S&P/TSX composite index was down 33.76 points, or 0.18%, at 19,070.72. (Reporting by Bansari Mayur Kamdar in Bengaluru; Editing by Maju Samuel)