By Myra P. Saefong
SAN FRANCISCO (MarketWatch) -- Canadian equities headed lower Wednesday, pulling back after tallying a five-session gain of nearly 3% amid disappointing data on U.S. private payrolls. The S&P/TSX Composite Index CA:$ISPTX -0.94% shed 0.9% to 12,223.88. Data showing that U.S. private-employment gains in April were at their weakest in seven months also weighed on U.S. and some European stock markets. Among the subsectors in Toronto, the S&P/TSX Capped Diversified Metals & Mining Index XX:TTMN -2.24% was the biggest decliner, down 2.1%, with shares of Canada Natural Resources Ltd. CA:CNQ -2.16% down 1.8%. In currencies action, the U.S. dollar USDCAD +0.01% bought 98.88 Canadian cents, up from 98.56 Canadian cents late Tuesday.