Economists say levies of between 10% and 50% have dramatically added to the risk of a worldwide downturn

As world leaders reacted to the US president’s “liberation day” tariff policies demolishing the international trading order, about $2.5tn (£1.9tn) was wiped off Wall Street and share prices in other financial centres across the globe.

World leaders from Brussels to Beijing rounded on Trump. China condemned “unilateral bullying” practices and the EU said it was drawing up countermeasures.

While Trump timed his Wednesday evening Rose Garden address to avoid live tickers of crashing stock markets, that fate arrived when Asian exchanges opened hours later.