Stock Market Today: Dow, S&P Live Updates for January 21

Financial markets got an early reminder of life under US President Donald Trump as initial relief over the lack of immediate sweeping tariffs on all trading partners turned to nausea for some as he promised to impose tariffs on Mexico and Canada within weeks.

The dollar opened lower before rising as he threatened to impose tariffs of as much as 25% on Canadian and Mexican imports as soon as February 1. US stock futures swung between gains and losses as traders weighed what the limited promises portend for inflation. Chinese stocks rose in the absence of announcements on China, although analysts cautioned against reading too much into Trump’s first day in office.