The Toronto Stock Exchange is down 230 points at midday with most sectors lower.
Miners and healthcare are the best performers, up 1.9% and 1.3%, respectively.
Info tech is the biggest laggard, 2%.
In other news, the federal and Alberta governments are likely to announce a deal on industrial carbon pricing this Friday, CTV News reports, citing unnamed sources.
The sources also say Canada and Alberta are working around the idea of setting the $130-a-tonne price by 2040, as opposed to 2030, CTV notes.
In stocks, Boyd Group Services (BYD.TO) is down near 12% to a multi-year low of $134.94 after it reported its first-quarter results this morning.