President Donald Trump’s 25% tariffs on Canadian and Mexican imports took effect Tuesday. But actually collecting them is proving complicated.

These are the stocks posting some of the largest moves in premarket trading.

China “firmly rejects” additional U.S. tariffs on Chinese goods and will take countermeasures, the Ministry of Commerce said in a statement Tuesday.

CBOE Global Markets’ Mandy Xu contends the bond market has been more sensitive to economic uncertainty than stocks. But now, that gap may be starting to close.

The risks for higher inflation are on the rise, St. Louis Federal Reserve President Alberto Musalem said Monday.

These are the stocks posting the largest moves in midday trading.

These are the stocks posting the largest moves in early trading.

Democrats and Republicans are making competing claims about how extending tax cuts from Trump’s first term would benefit the rich and poor.

“Tariffs are actually, we’ve had a lot of experience with them. They’re an act of war, to some degree,” Buffett said.

As excitement over DeepSeek moderated, JPMorgan gave its clients a warning: “Be careful: U.S.-China risks back in focus.”