Markets had dismissed tariff risks under the assumption that Trump would follow an earlier pattern and back off, in what became known as the so-called TACO trade. That allowed stocks to reach new record-high territory recently, marking a stunning rebound from the collapse triggered by his “Liberation Day” reciprocal tariffs in April.

Tariff Man is back again — and so is Wall Street’s TACO trade. President Donald Trump is once more threatening to lob massive duties on a wide swath of US imports, everything from copper and pharmaceuticals to goods from Japan and Russia.