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Iran Shuts Key Oil Route During High Stakes Nuclear Talks

By Morgan Ellis · Wednesday, February 18, 2026
Finn's Take· TL;DR
  • Iran closed Strait of Hormuz during drills, signaling it can disrupt 20% of global oil supplies amid nuclear negotiations.
  • Nuclear talks between Iran and US focus on uranium enrichment limits and sanctions relief after recent military conflict.
  • Both sides escalating: US deployed advanced carriers; Iran threatens retaliation against military action and US personnel in region.
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Strait of Hormuz Closure Sends Global Warning

Iran announced the temporary closure of the Strait of Hormuz on Tuesday for live fire drills in a rare show of force as its negotiators held another round of indirect talks with the United States over the Islamic Republic's disputed nuclear program. It was the first time Iran has announced the closure of the key international waterway, through which 20% of the world's oil passes, since the U.S. began threatening Iran and rushing military assets to the region.

The drills by the Islamic Revolutionary Guard Corps involved advanced missile systems and patrol ships simulating attacks on hostile targets and the seizure of a oil tanker, according to state-run Islamic Republic of Iran Broadcasting (IRIB). The closure took several hours and according to IRIB was meant to demonstrate Iran's ability to control shipping traffic in the strategic waterway. About 20 to 30 per cent of global daily oil consumption, more than 20 million barrels, transits the waterway.

Danny Citrinowicz, an Iran expert at Israel's Institute for National Security Studies, said Iran last closed the strait during the war with Iraq in the 1980s, when it mined the waterway. He said the latest announcement was a message to the international community that any strike on Iran would have global impact.

Nuclear Talks Reach Critical Juncture

Tehran sent alarming signals across the Middle East on Tuesday by partially closing the Strait of Hormuz for hours ahead of high-stakes nuclear negotiations between Iranian and U.S. officials in Geneva. The meetings reportedly focused on nuclear issues, with both sides exchanging notes via Omani mediators.

U.S. negotiators under Mr. Trump ruled out letting Tehran keep its nuclear program during last year's discussions, which were interrupted in June by a 12-day war pitting Israel and the U.S. against Iran. The war decimated Tehran's defense infrastructure and culminated with U.S. preemptive strikes on key uranium enrichment sites in Iran. This month's negotiations are the first official diplomatic talks between Tehran and Washington since the war.

The offer comes as the whereabouts of more than 400 kilograms of highly enriched uranium Iran possessed before last year's conflict with Israel and the US remains unknown. UN nuclear inspectors last recorded the location of the uranium on 10 June, three days before Israel launched strikes on Iranian nuclear facilities.

High Stakes Military Posturing

Last week, the US deployed its most advanced aircraft carrier, the USS Gerald R Ford, to the Middle East to join another carrier already in the region, further pressuring Tehran to negotiate. Iran's Supreme Leader Ayatollah Ali Khamenei stepped up his warnings to the U.S. over its buildup of military forces in the Middle East. "Of course a warship is a dangerous apparatus, but more dangerous than the warship is the weapon that can sink the warship into the depths of the sea," Khamanei said, Iranian state TV reported. He also warned the U.S. that "forcing the result of talks in advance is a wrong and foolish job."

Iran has strongly asserted that it would aggressively respond to any U.S. military strike and that U.S. personnel in the region would be legitimate targets. The Middle East hosts at least 19 U.S. military sites and at least 40,000 troops.

Economic Stakes Drive Negotiations

Iran's Foreign Ministry says it's open to a deal to limit its ability to enrich uranium in exchange for relief from sanctions. But Foreign Minister Abbas Araghchi said any new agreement must include the right to enrich nuclear material for peaceful purposes. Iranian Foreign Minister Abbas Araghchi said Iran is "very serious in negotiations" and is eager to "achieve results". However, he said, "There is a wall of mistrust towards the United States, which stems from America's own behaviour."

The dual-track approach of military exercises alongside diplomatic talks reflects Iran's strategy to negotiate from a position of strength while the global economy watches nervously. Oil prices fell after the talks concluded. The timing of these maneuvers, coinciding with the fourth anniversary of Russia's invasion of Ukraine and separate peace talks in Geneva, underscores how multiple global crises are converging simultaneously.

The success of these negotiations could determine whether the Middle East slides toward another devastating conflict or finds a diplomatic path forward. With Iran's nuclear capabilities diminished but not eliminated by last year's strikes, and both sides facing domestic pressures to show strength, the coming weeks will test whether pragmatism can prevail over posturing in one of the world's most volatile regions.

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