* The Toronto Stock Exchange's TSX rises 0.31 percent to 17,555.47 

* Leading the index were Lightspeed POS Inc , up 12.0%, Ballard Power Systems Inc, up 9.2%, and Boralex Inc, higher by 8.4%.

* Lagging shares were First Majestic Silver Corp, down 6.2%, New Gold Inc, down 6.1%, and MAG Silver Corp, lower by 5.6%.

* On the TSX 86 issues rose and 134 fell as a 0.6-to-1 ratio favored decliners. There were 10 new highs and no new lows, with total volume of 120.5 million shares.

* The most heavily traded shares by volume were Air Canada, Tc Energy Corp and Suncor Energy Inc.

* The TSX's energy group fell 1.59 points, or 1.8%, while the financials sector slipped 0.20 points, or 0.1%.

* West Texas Intermediate crude futures fell 2.17%, or $1.04, to $46.93 a barrel. Brent crude  fell 1.79%, or $0.91, to $50 [O/R]

* The TSX is up 2.9% for the year.