Oct 7 (Reuters) - Canada's main stock index fell at open on Monday, led by losses in shares of cannabis producer Hexo Corp HEXO.TO after its chief financial officer resigned, as well as concerns over the outcome of the U.S.-China trade talks this week.
* At 9:30 a.m. ET (13:30 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 21.27 points, or 0.13%, at 16,428.08.