OHMEGA/MONSTER

Hormuz saw serious traffic disruption, but the record doesn’t prove a sustained full closure

Visible tanker counts dropped sharply in mid-July and insurers treated passage as riskier, while conflicting “open/closed” statements persisted and AIS gaps mean a total shutdown wasn’t established.

IranUnited StatesOman

The Strait of Hormuz was not shown to be fully closed. What the record does show is a serious operational disruption: tanker traffic slowed on July 10, fell to multi-week lows by July 13, and Reuters later reported just six vessels transiting on Sunday, the lowest count in five weeks. CNBC, using Kpler data, reported 14 ships on Sunday, down from 37 a week earlier. Those counts are only a visible floor, not a complete tally, because Reuters reported that ships were increasingly switching off AIS transponders.

That matters because Hormuz is not just any shipping lane. The EIA says the strait averaged 20 million barrels per day in 2024, about 20% of global petroleum liquids consumption, and around one-fifth of global liquefied natural gas trade also moved through it. The same EIA page says flows had not been blocked after the recent tensions. CNBC quoted the U.S. Energy Department saying more than 8 million barrels still transited on Sunday, with total flows out of the Middle East Gulf region averaging 15 million barrels per day. So the evidence points to a chokepoint under strain, not a dead one.

Commercial behavior matched that picture. Insurance Journal reported fewer quote requests, reluctance by shipowners to commit, and marine war-risk premiums rising to roughly 2% to 6% of vessel value. That is not proof of a total blockade, but it is strong evidence that market participants were treating passage as materially riskier.

The public language around the strait was also split. Reuters quoted Trump saying Hormuz is open to commercial traffic, while Reuters also reported Iran saying it was closed until further notice after a vessel traveled an unapproved route and was struck. Defense News reported the U.S.-led Joint Maritime Information Center saying neutral transit to or from non-Iranian destinations would not be impeded, while unauthorized vessels could be intercepted, diverted, or captured.

IMO’s response points to the same middle ground. Its Hormuz page says it is closely monitoring the situation, maintaining guidance and incident information, and implementing an evacuation plan for stranded seafarers, though that plan is currently paused. In other words: the route was contested, constrained, and dangerous — but the current record does not establish a verified, sustained closure.

Source recordSources / claims / limits

How this piece is framed: Treat the story as a measured operational disruption with an evidence-strength gradient: visible traffic fell sharply, insurers and shipowners acted cautiously, and JMIC/IMO guidance described constrained passage rules — while official 'open/closed' statements remained conflicting and the record still does not prove a full sustained shutdown.

Sources

Claims, and how far we tracked each down

  • [confirmed] Tanker and vessel traffic through the Strait of Hormuz fell sharply in early July 2026. · read in full (as of 2026-07-16)
  • [confirmed] Reuters reported vessel transits fell to multi-week lows by July 13. · read in full (as of 2026-07-16)
  • [confirmed] CNBC reported 14 ships transited Hormuz on Sunday, down about 60% from 37 the same day a week earlier, using Kpler data. · read in full (as of 2026-07-16)
  • [confirmed] Reuters reported that commercial traffic through the Strait of Hormuz continued at reduced levels, and shipping industry sources said vessels were increasingly switching off public AIS transponders, making full counts harder to determine. · read in full (as of 2026-07-16)
  • [confirmed] Marine war-risk premiums for Hormuz transits rose to roughly 2% to 6% of vessel value, with some earlier periods reaching as high as 10%. · read in full (as of 2026-07-16)
  • [confirmed] London marine insurers saw fewer inquiries for Hormuz transits as shipowners grew more reluctant to commit. · read in full (as of 2026-07-16)
  • [confirmed] The US military/JMIC said neutral transit through the Strait of Hormuz to or from non-Iranian destinations would not be impeded. · read in full (as of 2026-07-16)
  • [confirmed] Defense News reported that the JMIC advisory said neutral transit through the Strait of Hormuz to or from non-Iranian destinations would not be impeded, but unauthorized vessels could be intercepted, diverted, or captured. · read in full (as of 2026-07-16)
  • [confirmed] IMO is treating the Strait of Hormuz situation as an active maritime-safety and seafarer-protection crisis, maintaining a dedicated guidance and incident-information page, evacuation coordination, and a UN-led task force connection. · read in full (as of 2026-07-16)
  • [confirmed] IMO’s Strait of Hormuz evacuation framework is described as a voluntary mechanism that preserves navigation rights under UNCLOS and applies to SOLAS vessels confined in the Persian Gulf that wish to depart. · read in full (as of 2026-07-16)
  • [confirmed] IMO’s Strait of Hormuz page says the evacuation plan is currently paused, while IMO continues to publish transits data, regional contacts, incident lists, and guidance links for shipping and seafarers. · read in full (as of 2026-07-16)
  • [confirmed] The EIA says the Strait of Hormuz averaged 20 million barrels per day of oil flow in 2024, about 20% of global petroleum liquids consumption. · read in full (as of 2026-07-16)
  • [confirmed] CNBC reported that the U.S. Energy Department said more than 8 million barrels of oil transited Hormuz on Sunday, and that total flows out of the Middle East Gulf region were averaging 15 million barrels per day. · read in full (as of 2026-07-16)
  • [confirmed] Reuters reported that Trump said the Strait of Hormuz is open to commercial traffic, while Iran earlier declared it closed after a vessel traveled on an unapproved route and was struck. · read in full (as of 2026-07-16)