Jan 23 (Reuters) - Canada's main stock index was muted at the open on Monday, as gains in technology and energy stocks were capped by losses in materials stocks as focus shifts to the Bank of Canada's interest rate hike decision later in the week.

At 9:31 a.m. ET (14:31 GMT), the Toronto Stock Exchange's S&P/TSX composite index was down 9 points, or 0.04%, at 20,494.21. (Reporting by Shashwat Chauhan in Bengaluru; Editing by Shailesh Kuber)