Which stocks are most affected?

NVDA and MRK are among the most watched, but the impact may extend to energy and shipping sectors.

What is the Strait of Hormuz?

The Strait of Hormuz is a strategic waterway through which about 20% of global oil supplies pass, located between Iran and the UAE.

Did the strikes affect oil prices?

The article did not mention a direct impact on oil prices, but tensions in the strait typically push prices higher.

US Futures Fall After Trump Orders Strikes on Iran: NVDA, MRK in Focus

US stock futures declined after President Trump ordered military strikes against Iran in response to attacks on commercial ships in the Strait of Hormuz. NVDA and MRK are among the most watched stocks.

July 13, 2026

2 min read

Source: Stocktwits

US stock index futures fell today after President Donald Trump directed military strikes against Iran to "hold Iranian forces accountable" for attacks on commercial vessels in the Strait of Hormuz, according to a statement from U.S. Central Command.

Details

U.S. Central Command (CENTCOM) said American forces had begun launching further strikes against Iran to thwart their ability "to attack civilian mariners and commercial ships freely transiting the Strait of Hormuz." No details were provided on the scope of the strikes or specific targets.

Context

The development comes amid heightened tensions in the Middle East, where Iran has previously threatened to close the strategic Strait of Hormuz, through which about 20% of global oil supplies pass. The decision triggered a sell-off in U.S. markets, with futures for the Nasdaq, S&P 500, and Dow Jones all declining.

What It Means for Investors

Geopolitical tensions in the Middle East are a major risk factor for markets, particularly for energy and shipping stocks. Conversely, defense and security stocks may benefit from increased military spending. Investors are advised to monitor developments closely and adjust positions based on their risk tolerance.

Frequently Asked Questions

They fell after President Trump ordered military strikes against Iran, raising fears of geopolitical escalation in the Middle East.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.