TORONTO (Reuters) - Canada's main stock index opened lower on Thursday, weighed down by Potash Corp after its fourth-quarter profit fell and an 11 percent drop in Research In Motion Ltd the day after the BlackBerry maker released a new line of phones.
The Toronto Stock Exchange's S&P/TSX composite index was down 35.22 points, or 0.28 percent, at 12,759.22 shortly after the open.
(Reporting by John Tilak; Editing by Jeffrey Hodgson)
