July 31 (Reuters) - Canada's main stock index opened flat on Wednesday, as investors awaited the U.S. Federal Reserve's decision on interest rates in the face of a global economic slowdown.
* At 9:31 a.m. ET (13:31 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 6.26 points, or 0.04%, at 16,459.79.