Canada's main stock index was muted on Friday, and on track to post a weekly loss of half a percent as energy stocks took a beating from lower oil prices.

The energy sector tumbled nearly 6% this week and is set for its worst week in nearly four months, as crude prices tumbled.

However, the sector gained 0.6% on Friday and kept the main index afloat.

At 9:42 a.m. ET (1342 GMT), the Toronto Stock Exchange's S&P/TSX composite index was up 2.83 points, or 0.01%, at 20,186.55.

Data showed the nation's wholesale trade increased by 0.5% in May from April on the food, beverage and tobacco subsector as well as machinery and equipment.

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The materials sector, which includes precious and base metals miners and fertilizer companies, lost 0.8% as gold futures fell 0.2% to $1,824.5 an ounce.

On the TSX, 133 issues were higher, while 87 issues declined for a 1.53-to-1 ratio favouring gainers, with 12.22 million shares traded.

The largest percentage gainer on the TSX was Methanex Corp , which jumped 6.2%, after the methanol producer raised its quarterly divided.

Alt-energy producer Westport Fuel Systems Inc followed with a 3.3% rise.

Turquoise Hill Resources Ltd fell 12.7%, the most on the TSX, after multiple brokerages cut their price targets on the stock. The second biggest decliner was B2Gold Corp, down 4.3% after National Bank of Canada cut its price target on the miner.

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The most heavily traded shares by volume were Royal Bank of Canada, B2Gold Corp and Baytex Energy Corp .

The TSX posted no new 52-week high and no new low.

Across all Canadian issues there were 50 new 52-week highs and four new lows, with total volume of 22.06 million shares.