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Stocks surge and oil prices plunge after Iran reopens Strait of Hormuz

Oil prices fell more than 10% as Iranian authorities said the key shipping route was open for commercial traffic, easing supply fears.

  • On Friday, Iranian Foreign Minister Seyed Abbas Araghchi declared the Strait of Hormuz "completely open" for commercial traffic during the 10-day ceasefire between Israel and Lebanon, marking the first full reopening since the conflict began.
  • The waterway had been effectively closed since the conflict between the United States, Israel, and Iran began on February 28, causing a severe oil supply shock that disrupted global trade and forced prices higher.
  • Benchmark U.S. crude plunged more than 10% to just over $81 per barrel immediately after the announcement, while the Dow Jones Industrial Average soared 1,005 points as markets priced in restored supply flows.
  • President Donald Trump celebrated the reopening but stated the U.S. naval blockade of Iranian ports will remain "in full force and effect" until a transaction with Iran is 100% complete.
  • Analysts including Kathleen Brooks, research director at XTB, caution the reopening remains conditional on the fragile 10-day ceasefire, warning that supply relief could prove temporary if hostilities resume.
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There is prevailing optimism among investors that the war between the United States and Iran may be nearing its end.

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CNBC broke the news in United States on Friday, April 17, 2026.
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