Canada faces another set of tariffs in its ongoing trade talks with the U.S. However, in this latest round of tariff announcements, investors have learned to largely tune them out as negotiating bluster rather than policy commitments.

President Donald Trump ratcheted up tariffs on Canada late Thursday, stoking tensions with a top U.S. trade partner as the two sides try to hash out a trade agreement by the end of the month. The Dow Jones Industrial Average tumbled 250 points,