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Mar 23, 2026 8:01 AM

Stock Market Today: S&P 500, Dow Jones Futures Plunge As Trump Issues Ultimatum To 'Obliterate' Iran—SSR Mining, Nebius, United Airlines In Focus

U.S. stock futures fell on Monday following Friday’s sharp sell-off. Futures of the major benchmark indices were lower.

President Donald Trump issued a 48-hour ultimatum for Iran to reopen the Strait of Hormuz, warning that the U.S. would "obliterate" Iranian power plants if they fail to comply by 7:44 p.m. ET on Monday. Highlighting this ultimatum, Ed Yardeni said, "So Apocalypse Now might or might not happen at 7:44 pm EST on Monday."

Despite this ultimatum, tensions escalated further on Monday as Iran threatened to target U.S. and allied energy and IT infrastructure.

Meanwhile, the 10-year Treasury bond yielded 4.41%, and the two-year bond was at 3.97%. The CME Group's FedWatch tool‘s projections show markets pricing an 85.5% likelihood of the Federal Reserve leaving the current interest rates unchanged in its April meeting.

Index

Performance (+/-)

Dow Jones

-0.46%

S&P 500

-0.58%

Nasdaq 100

-0.63%

Russell 2000

-0.95%

The SPDR S&P 500 ETF Trust (NYSE:SPY) and Invesco QQQ Trust ETF (NASDAQ:QQQ), which track the S&P 500 and Nasdaq 100, respectively, were lower in premarket on Monday. The SPY was down 0.66% at $644.29, while the QQQ declined 0.86% to $577.04.

Stocks In Focus

United Airlines Holdings

United Airlines Holdings Inc. (NASDAQ:UAL) fell 1.95% in premarket on Monday after it announced plans to reduce scheduled capacity by about 5% in the second and third quarters.

Benzinga’s Edge Stock Rankings indicate that UAL maintains a strong price trend over the long term but a weak trend in the short and medium terms, with a solid growth score.

STMicroelectronics NV

STMicroelectronics NV (NYSE:STM) declined 2.59% even as it announced the start of volume production and first deliveries of its STM32 microcontrollers fully manufactured in China through a localized “China for China” supply chain.

Benzinga’s Edge Stock Rankings indicate that STM maintains a strong trend in the short, long, and medium terms with a moderate value ranking.