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TORONTO, Oct 27 (Reuters) - Canada's main stock index opened lower on Tuesday, with energy stocks weighing as oil prices fell on rising worries about a supply glut.
The Toronto Stock Exchange's S&P/TSX composite index was down 48.77 points, or 0.35 percent, at 13,742.13 shortly after the open. Seven of its 10 main groups fell. (Reporting by Alastair Sharp; Editing by Jeffrey Benkoe)