TORONTO, March 5 (Xinhua) -- Canada's main stock index rose Monday, reversing last week's losses as investors interpreted U.S. President Donald Trump's threats to impose tariffs on steel and aluminum imports as a negotiating tactic to get a better deal on NAFTA talks under way in Mexico.

The Toronto Stock Exchange's benchmark Standard & Poor's/TSX Composite Index rose 156.69 points, or one percent, close the day at 15,541.28. All 10 sectors on the index rose.

The Canadian dollars came down to 0.77 U.S.dollar.

Trump tweeted Monday that Canada and Mexico could be exempt from the tariffs if a "new & fair" North American Free Trade Agreement is signed. Representatives from the United States, Canada and Mexico are meeting in Mexico City Monday to wrap up the latest round of discussions on the trade agreement. Canada sends 75 percent of its exports to the United States.

The biggest gainer was Crew Energy Inc surged 17.3 percent after reporting increases in its adjusted funds flow and production.

Marijuana producer Canopy Growth Corp was the second-biggest gainer, jumping 11.7 percent.

The healthcare group was the best-performing sector, up 5.7 percent.

Baytex Energy Corp, Trican Well Service Ltd and Ensign Energy Services Inc were also among the 10 biggest gainers, rising 10.2 percent, 7.5 percent and 7.2 percent separately.

Interfor Corp was the biggest decliner, with a 3.9 percent loss, followed by Corus Entertainment Inc, which fell 3.5 percent.