A supertanker burns in the Strait of Hormuz after hitting a mine, and Iran’s Guards call the waterway closed

Iran’s Revolutionary Guard Corps said on Saturday that an oil tanker exploded and caught fire after hitting a naval mine while transiting the Strait of Hormuz^2,4. The statement was shared through Iranian state media¹. Anadolu reported the Guards’ account that the supertanker was carrying over two million barrels of crude when the explosion set it alight^6,7. Xinhua reported the IRGC navy describing the ship as a “violating” supertanker³.

The Guards then went further than the incident itself. “The Strait of Hormuz is closed,” the IRGC Navy declared, warning of consequences for vessels that defy Iranian regulations there⁵. It warned all vessels against using the waterway, saying the strait remained closed under Iran’s sovereign decisions⁷. US Central Command rejects that account. CENTCOM insists the strait remains open for passage, has called the Guards’ mine claim about the GFS Pride false, and says the ship sank under tow⁹. CENTCOM also said about 400 merchant ships transited the strait over the past week⁸.

Why it matters to investors

Neither side’s version can be verified from this reporting, but the cost of moving oil is not in dispute. Interactive Brokers reported that a supertanker loading crude in the Gulf of Oman was fixed at $1.01 million a day for a voyage to Asia, with another deal reportedly agreed at $1.16 million, and that Bloomberg Intelligence put the record benchmark rate for very large crude carriers at $907,635 a day¹².

The attack rate is also under-counted. The UK Maritime Trade Operations centre said at least 12 vessels were attacked in the strait in the last week and that many attacks are not being reported¹⁰. NPR’s news roundup said at least six cargo vessels were attacked and sunk during the week¹¹. NBC News reported attacks in and around the strait at a record high with little US response¹⁴, and the Independent described a “new normal” of record attacks and oil at $100 a barrel¹³.

What to watch

Watch which account underwriters price. War-risk premiums and crude carrier day rates will show whether owners believe the closure declaration or the CENTCOM transit count^8,9,12. Watch whether the reported gap between attacks and attack reports narrows, because the UKMTO tally is the basis on which those premiums are set¹⁰. And watch the fate of the mined vessel itself, since CENTCOM’s statement that it sank under tow and the Guards’ statement about the cause lead to different conclusions about who now controls the waterway^5,9.