June 19 (Reuters) - Canada's main stock index opened marginally higher on Wednesday, boosted by materials stocks tracking higher metal prices, while investors awaited more cues on the interest rate cut trajectory in the United States and Canada.

At 9:30 a.m. ET (13:30 GMT), the Toronto Stock Exchange's S&P/TSX composite index was up 7.01 points, or 0.03%, at 21,618.31. (Reporting by Purvi Agarwal in Bengaluru)