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U.S. Strikes on Iran Nuclear Sites Fuel Oil Rally and Hormuz Blockade Threat

Tehran’s parliament backed closing the Strait of Hormuz, prompting Washington to call on China to help avert a supply disruption.

Oil tankers pass through the Strait of Hormuz, December 21, 2018. REUTERS/Hamad I Mohammed/File Photo
A map showing the Strait of Hormuz and Iran is seen in this illustration taken June 22, 2025. REUTERS/Dado Ruvic/Illustration
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Overview

  • On June 22, U.S. forces struck Iran’s Fordow, Natanz and Isfahan nuclear facilities in President Trump’s first direct military action in the IranIsrael conflict.
  • Brent crude surged as much as 5.7 percent to over $81 a barrel before settling near $79 and U.S. stock futures declined as traders priced in heightened geopolitical risk.
  • Iran’s parliament approved a nonbinding measure to close the Strait of Hormuz, though the final decision rests with the Supreme National Security Council and Ayatollah Khamenei.
  • Secretary of State Marco Rubio warned that shutting the waterway would be “economic suicide” for Iran and urged China to pressure Tehran to keep the strait open.
  • Analysts caution that any disruption of the Hormuz chokepoint, which handles about 20 percent of global oil flows, could drive prices toward $100 a barrel and unsettle the world economy.