CANADA STOCKS-TSX turns negative on volatile commodities
TORONTO, May 19 (Reuters) - Toronto's main stock index turned lower on Thursday morning, as volatile commodity prices pulled the energy and materials sectors into negative territory.
At midmorning, the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 0.91 of a point at 13,606.34.
($1=$0.97 Canadian) (Reporting by Julie Gordon; Editing by Jeffrey Hodgson)
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