TORONTO, Jan 18 (Reuters) - Canada's main stock index closed lower on Wednesday, hurt by a 17 percent fall in shares of uranium producer Cameco Corp CCO.TO after a profit warning and as lower oil prices weighed on energy companies.
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE unofficially closed down 43.51 points, or 0.28 percent, at 15,397.85.