On Monday, Trump promised a new tariff on all products entering the U.S. from Mexico and Canada until the countries crack down on the flow of drugs and “illegal aliens,” he said in a Truth Social post.

The president-elect’s market-friendly appointments to Treasury and other agencies brought relief to investors. The trade threat suggests that might be premature.

"We typically think as a rule of thumb that about 75% of the tariff will be passed onto consumers," MIT economics professor Christopher Knittel said. "That means about 1200 extra