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Asian stocks tumble as Trump gives Iran 48-hour ultimatum

(Reuters)
23 Mar 2026 09:01

(AFP)

Stocks tumbled on Monday and oil prices rose after Donald Trump and Iranian leaders traded threats over the key Strait of Hormuz, while Israel said the war could last several more weeks.

With the conflict now in its fourth week and showing no sign of ending, the head of the International Energy Agency warned of the worst global energy crisis in decades and said the world economy was under "major threat" from the crisis.

Observers, meanwhile, have also raised the prospect of a surge in inflation that could force central banks to hike interest rates, while the choking off of fertiliser shipments has also fanned concerns about global food security.

The US president on Saturday gave Iran 48 hours to reopen the Strait of Hormuz to shipping or face the destruction of its energy infrastructure.

The ultimatum, made just a day after the US leader said he was considering "winding down" military operations, came as the waterway -- through which a fifth of global oil and gas flows -- remained effectively closed.

Trump wrote on Truth Social that the US would "hit and obliterate" Iranian power plants -- "starting with the biggest one first" -- if Tehran did not fully reopen the strait within 48 hours, or 23:44 GMT on Monday, according to the time of his post.

That came a day after Trump ruled out a ceasefire agreement, saying Washington had the upper hand.

Iran warned Hormuz "will be completely closed" if Trump acted on his threat.

The latest escalation came as Israel's military said it will expand its ground operations in Lebanon against Iran-backed militant group Hezbollah, while a spokesman said the country faced "weeks" more fighting against Iran and Hezbollah.

The escalation hammered stock markets, with Seoul and Tokyo -- which had been the standout performers before the war started -- taking the brunt of the selling, shedding as much as six and five percent, respectively, at one point.

Shanghai and Manila all lost more than two percent. Sydney, Singapore and Wellington were also deep in negative territory.

South Korea's won dropped to 1,510 won per dollar, its weakest level since 2009.

Oil prices edged up, with Brent sitting around $112 and West Texas Intermediate just below $100.

Meanwhile, IEA boss Fatih Birol said Monday: "The global economy is facing a major, major threat today, and I very much hope that this issue will be resolved as soon as possible.

"No country will be immune to the effects of this crisis if it continues to go in this direction. So there is a need for global efforts."

His remarks came as central banks reconsider their monetary policies amid expectations that the surge in oil prices will send inflation soaring, with the Reserve Bank of Australia last week hiking interest rates.

The prospect of higher borrowing costs has hammered non-yielding gold, which has fallen for eight straight days and just suffered its worst weekly drop since 1983.

Bullion was sitting around $4,350 Monday, having hit a record high of almost $5,600 at the end of January.

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