Hormuz swings again
Access to the Strait of Hormuz swung back and forth this weekend as Iran and the U.S. traded conflicting claims about commercial passage and naval control. (NPR reported Iran’s foreign minister saying the strait was open after an Israel‑Lebanon ceasefire, while AP later reported Iran said it had closed Hormuz over a continuing U.S. blockade and Trump said the blockade would remain) (npr.org)(apnews.com). Oil markets responded with prices easing on ceasefire hopes even as reports said tankers were still moving through amid fragile diplomacy and a planned multinational mission for the strait. (kyivpost.com)(indiatoday.in)
Iran and the United States spent April 17 and April 18 making opposite claims about the Strait of Hormuz, leaving shippers to guess whether the world’s busiest oil chokepoint was open or shut. (npr.org) (apnews.com) On Friday, April 17, Iranian Foreign Minister Abbas Araghchi said the strait was “completely open” to commercial vessels after a 10-day Israel-Lebanon ceasefire took effect. President Donald Trump said the same day that passage could resume, but he also said the U.S. naval blockade on Iranian ports and shipping would stay in force. (npr.org) (politico.com) By Saturday, April 18, Iran reversed course. Iranian military officials said control of the strait had “returned to its previous state” because the U.S. blockade was still in place, and The Associated Press reported Iranian forces fired on a ship trying to pass through. (apnews.com) (npr.org) The strait is a narrow waterway between Iran and Oman that links the Persian Gulf to the Gulf of Oman and the Arabian Sea. The International Energy Agency said about 20 million barrels a day of crude oil and oil products moved through it in 2025, and the channel narrows to 29 nautical miles at its tightest point. (iea.org) That volume makes Hormuz the main export route for Gulf producers including Saudi Arabia, Iraq, Kuwait, the United Arab Emirates and Qatar. The U.S. Energy Information Administration said crude, condensate and petroleum product flows through the strait still averaged about one-fifth of global petroleum liquids consumption in 2024. (eia.gov) (iea.org) Markets reacted first to the reopening claim, not the later reversal. Reports on April 18 said oil prices eased on ceasefire hopes even as tanker traffic remained patchy and operators waited for proof that warships, insurers and port authorities would all treat the route as usable. (kyivpost.com) (nytimes.com) Shipping data and news reports suggested the strait never fully returned to normal traffic. CNBC reported on April 17 that analysts and maritime freight specialists still viewed the lane as effectively closed, while India Today reported on April 18 that some tankers were crossing under heavy uncertainty. (cnbc.com) (indiatoday.in) The dispute turned on two different questions: whether commercial ships could physically transit the waterway, and whether the U.S. would keep blocking Iranian ports and vessels. Iran tied wider passage to an end to that blockade, while Trump said the blockade would remain until a broader deal with Tehran was complete. (npr.org) (apnews.com) Officials and media outlets also described planning for a multinational security mission around the strait, a sign that diplomats and navies were treating any reopening as provisional rather than settled. That left Hormuz, by Saturday night, in the same place it started the weekend: central to ceasefire diplomacy, oil pricing and the risk of another round of attacks at sea. (indiatoday.in) (apnews.com)
