Sept 9 (Reuters) - Canada's commodity-heavy main stock

index opened higher on Tuesday, led by gains in material and

energy shares, while markets stayed optimistic about a potential

interest rate cut from the Bank of Canada later this month.

At 9:30 a.m. ET (1330 GMT), the Toronto Stock Exchange's

S&P/TSX composite index was up 0.20% at 29,084.61

points.