Fears of a widening Middle East war drove steep selloff in Asian markets on Monday, with South Korea and Japan leading losses as the clock ran down on Trump's ultimatum to Tehran.

Stocks are set to start Monday’s trading session higher as oil has started to decline following reaching $100 earlier. S&P 500 futures climbed 0.5% to 6672, while Dow Jones futures advanced 0.3% to 46746,

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Stock futures pointed lower Tuesday, a day after major indexes ended sharply higher, as oil prices returned to gains. Meanwhile, the two-day Federal Reserve meeting on interest rates begins today.

S&P 500 futures are down 0.3% to 6657. Dow Jones Industrial Average futures are down 0.4% to 46426. Nasdaq 100 futures are down 0.4% to 24556. U.S. stocks are set to fall on Thursday as oil spikes after key infrastructure in the Middle East was struck.

Why are US stock market indexes futures down today, and will Dow Jones, S&P 500 and Nasdaq stay in red or turn green again? Futures fell as Iran conflict raised oil prices and reduced rate cut hopes.

Discover how options and futures differ in the financial market, focusing on obligations, trading hours, and their roles for investors and institutions.

Futures and U.S. crude oil prices wavered after President Donald Trump's latest Iran war threats.