Sept 26 (Reuters) - Canada's main stock index opened lower on Monday weighed down by commodities and financial stocks as investors feared that aggressive central bank policy tightening could trigger a potential global economic downturn.
At 09:30 a.m. ET (13:30 GMT), the Toronto Stock Exchange's S&P/TSX composite index was down 79.33 points, or 0.43%, at 18,401.65. (Reporting by Shashwat Chauhan)
