Within hours of his declaration via social media to impose a double tariff of 50% on Canadian steel and aluminum, US President Donald Trump has capitulated to pressures from both the market and within his cabinet, floating the suggestion that he may pivot away from his own double-tariff just hours after declaring his intent to double targeted tariffs on Canada on his Truth Social account.

Donald Trump’s latest salvo in his global trade war—a 25% tariff hike on Canadian steel and aluminum imports, effective immediately—has sparked an unexpected rally in the euro, which surged 0.7% to $1.091, its strongest level since January. The move, escalating total duties on the metals to 50%, underscores how the…

As a new workweek begins, here's a reminder that businesses and investors hate uncertainty most of all.