Stock markets plunge after Trump's ultimatum on Iran

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2. Stock futures slide after Trump ultimatum to Iran; Wall Street tries to snap 4-week decline

https://www.cnbc.com/2026/03/22/stock-market-today-live-updates.html

Stock futures fell Monday, weighed by the U.S.′ latest warning against Iran, after the major U.S. benchmarks posted their fourth-straight weekly slide.

Dow Jones Industrial Average futures were 327 points lower, or 0.7% down. S&P 500 futures shed 0.8%, and Nasdaq-100 futures fell 1%.

Those moves came as the Iran war entered its fourth week, with tensions escalating over the weekend. President Donald Trump threatened an attack on Iranian power plants if the Strait of Hormuz — a key shipping route for oil and other energy products — isn’t reopened. Iran responded in turn said it would target U.S. infrastructure, including energy and desalination facilities ​in the Gulf, if the U.S. carried out its threat.

Crude prices rose in early Monday trading. West Texas Intermediate futures
climbed 1.1% to $99.22 per barrel. International benchmark Brent
advanced 1.3% to $113.58.
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