National Business

TORONTO — Some of the most active companies traded Monday on the Toronto Stock Exchange: Toronto Stock Exchange (19,046.74, down 68.90 points): TC Energy Corp. (TSX:TRP). Energy. Up eight cents, or 0.17 per cent, to $46.59 on 9.1 million shares.

WASHINGTON — The federal government and Enbridge Inc. are trying to exploit a "dormant" and outdated treaty with the United States to forestall the shutdown of the Line 5 pipeline, human rights and environmental groups argue in new court documents.

TORONTO — Losses in energy and metals stocks led the way down for Canada's main stock index Monday, while U.S. markets ended the day mixed. The S&P/TSX composite index closed down 68.90 points at 19,046.74.

OTTAWA — Housing Minister Sean Fraser says the federal government will reveal more housing measures in the fall budget update and in the coming months that aim to ramp up homebuilding across the country.

TORONTO — Bell Media announced a tentative $410-million deal Monday to buy the Canadian operations of outdoor advertising company Outfront Media Inc. in a move that experts say could solidify its hold on the out-of-home advertising market.

TORONTO — A new survey suggests the number of Canadians struggling with their monthly mortgage payment is on the rise, along with worries of potentially higher payments when it comes time to renew with their lender.

MONTREAL — The St. Lawrence Seaway has shut down as hundreds of workers walked off the job Sunday. Here are answers to a few key questions about what's going on: What is the St. Lawrence Seaway? The St.

ABUJA, Nigeria (AP) — A London judge on Monday overturned an arbitration award that would have required Nigeria to pay $11 billion over a failed gas project, finding the contract was obtained through fraud.

OTTAWA — The Canadian Agri-Food Policy Institute is recommending that governments across the country develop a national plan to sustainably manage and use water for the agri-food sector.

TORONTO — Aecon Group Inc. has signed a deal that will see Oaktree Capital Management LP invest $150 million in the company's utility infrastructure services business. Under the agreement, Oaktree will acquire a 27.