
May 21 (Reuters) - Canada's main stock index opened lower on Wednesday, pulling back from the previous session's record high, as investors awaited the outcome of a crucial debate on a sweeping U.S. tax bill and further trade developments.
At 9:31 a.m. ET (1331 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 0.3% at 25,975.25 points.