Oct 19 (Reuters) - Canada's main stock index opened higher on Monday, supported by gains in energy and materials sector, while renewed optimism around a U.S. stimulus agreement before the presidential election lifted sentiment.

* At 9:30 a.m. ET (13:30 GMT), the Toronto Stock Exchange's S&P/TSX composite index was up 26.13 points, or 0.16%, at 16,464.88. (Reporting by Amal S in Bengaluru; Editing by Shounak Dasgupta)