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TORONTO, June 22 (Reuters) - Toronto's resource-heavy main stock index turned positive shortly after the open on Tuesday as firmer bullion prices helped push up gold mining shares.
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was up 0.07 of a point at 11,936.15. The index had opened down 4.52 points at 11,931.56, pressured by softer oil and base metals prices. (Reporting by Jennifer Kwan; editing by Peter Galloway)