TORONTO, Dec.28 (Xinhua) -- Canada's main stock index hit an all-time record for a second straight trading session Thursday because gains for the shares of energy, technology and marijuana companies offset losses for industrials and gold miners.

The Toronto Stock Exchange's benchmark Standard & Poor's/TSX Composite Index climbed 18.82 points, or 0.12 percent, to end the day at 16,221.95. Six of the index' s 10 main groups closed.

The Canadian dollar closed Thursday at 0.79.44 U.S. dollar, up 0.33 of a U.S. cent. That's the highest level the loonie has been at since Oct. 9 this year.

Health-care stocks scored big time, with Canopy Growth up 8.7 percent o 30.19 Canadian dollars.

Aphria jumped 5.8 percent to 17.88 Canadian dollars.

In the energy group, Suncor rose 25 cents to 46.07 Canadian dollars while Imperial Oil gained 30 cents to 39.12 Canadian dollars.

Tech stocks also came out in the green, with BlackBerry up three cents to 14.23 Canadian dollars while Open Text rose 6.9 percent to 44.65 Canadian dollars.

Gold stocks weighed most among the sectors losing strength, as Barrick Gold down 15 cents to 18.17 Canadian dollars and Kinross Gold losing three cents to 5.41 Canadian dollars.

The industrials sector fell, with Waste Connections declining 1 percent to 88.91 Canadian dollars. Bombardier fell 2 cents to 3.01 Canadian dollars.