President Trump’s decision to impose sweeping tariffs on some of America’s largest trading partners sent shock waves through markets across the globe on Monday.

The day began with stocks dropping sharply on Wall Street, tracking a global slump that came overnight as investors dumped shares of companies that would be hardest hit by tariffs on imports from Canada, Mexico and China.

But the chaotic on-and-off-again rollout of the Trump administration’s plans — with the announcement late Monday morning that tariffs on Mexico would be delayed for a month and then, after the markets closed, a similar announcement about the tariffs on Canada — whipsawed markets, and traders scrambled to adjust to developments as they unfolded. Tariffs…