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Iran Conflict 2026
23JUL

500 ships idle as Hormuz stays shut

3 min read
19:27UTC

Zero new tankers crossed Hormuz in the 24 hours after Trump's signature; more than 500 ships stayed anchored as Bimco called a crossing very risky.

ConflictDeveloping
Key takeaway

Brent priced an open strait that no tanker actually crossed; insurers still block transit.

Zero Hormuz tankers transited in the 24 hours after Trump's 16 June signature, despite his declaration that the strait was open. The two crossings logged on 15-16 June were toll passages under the Islamic Revolutionary Guard Corps (IRGC) authority, Iran's military force that controls mine routes and passage conditions, not a reopening. More than 500 ships remain parked in the Gulf⁠1. Bimco, the world's largest shipowner association, calls a crossing "very risky": the floating mines are still live, no IRGC order has cleared the lanes, and not one Protection and Indemnity (P&I) club, the London-based mutual marine insurers, has lifted its Hormuz war-risk exclusion⁠2.

The insurance point drives the lanes more than the mines do. A tanker without P&I cover cannot dock, because terminals and lenders refuse an uninsured hull. The blockade now runs through London insurance underwriters as much as through Iranian mines, and every owner knows it. Jakob Larsen, Bimco's chief safety officer, said owners "still consider it very risky to commence transits at this point" while the mines stand uncleared.

Brent Crude, the global benchmark that prices roughly two-thirds of internationally traded oil, fell to between $78.82 and $81.55 on the signing, down as much as 5 per cent⁠3, near the two-month low it touched a week ago on deal optimism. Markets priced the expectation of an open strait. No moving ship lay behind the fall, because the lanes held zero new transits. The price moved; the cargo did not.

Deep Analysis

In plain English

When a ship sails through a war zone, it needs special war-risk insurance. The P&I clubs, mutual insurance associations based in London, provide this cover for roughly 90 per cent of the world's ships. They said on 16 June that the Hormuz strait is still too dangerous to cover, because Iranian military mines remain in the water and nobody has officially certified them as swept. Without that cover, a shipowner who loses a vessel in the strait cannot claim for the loss. No credible insurer will touch an active mine zone. This is why 500 ships are sitting in the Gulf, not because their owners do not want to move, but because sailing uninsured through an uncleared mine field is commercially and legally impossible.

Deep Analysis
Root Causes

The 500-ship backlog and zero-transit outcome have two distinct root causes. The mine threat is physical: CENTCOM's own assessment by mid-May was that 90 per cent of Iran's naval mine stockpile was warehoused, not in-water, but the remaining deployed mines have not been certified as swept. Bimco's Jakob Larsen cited active mines as the primary safety barrier.

The P&I club constraint operates through the International Group of P&I Clubs, which covers roughly 90 per cent of the world's ocean-going tonnage. The group sets a collective de-risk bar that no individual member club can unilaterally lower without triggering reinsurance withdrawal by the London market. P&I clubs cannot issue standard hull and liability cover for a zone the Lloyd's Joint War Committee lists as enhanced-risk without a UN resolution or government certification of safety.

What could happen next?
  • Consequence

    P&I de-listing of Hormuz requires mine clearance certification or a UN resolution; the 60-day nuclear talks window does not address either condition.

  • Risk

    Oil markets pricing a reopening that has no ships behind it face a correction risk if Friday's ceremony also fails to produce mine clearance progress.

First Reported In

Update #130 · Trump signed the war over; it kept going

Argus Media· 17 Jun 2026
Read original →
Different Perspectives
Wang Yi
Wang Yi
China's foreign minister and Djibouti's issued a joint communique on 21 October saying the war should not reach the Horn of Africa and stressing free navigation through Bab al-Mandeb. The text names neither Iran nor the Houthis, and Djibouti hosts China's only overseas military base, opposite the Yemeni coast.
Ministry of External Affairs
Ministry of External Affairs
India's foreign ministry called the attacks on Saudi civilian and energy sites "unacceptable" on 22 October and said they must stop at once. An Indian died at Dammam, Indians were injured there and at Shaybah, and about 4,000 Umrah pilgrims remain stranded by one MP's count.
Iraq
Iraq
Iraq closed the al-Sheeb crossing with Iran to travellers and trucks from 21 October and said other crossings would close gradually. Unlike September's closure, which ended on a staged timetable, this one has none, and Iran's interior ministry said it received no notice.
Abdel Fattah el-Sisi
Abdel Fattah el-Sisi
Egypt's president said on 21 October that Cairo's support would "defend Saudi territory, and does not include an attack on Yemen". Araghchi warned that Egyptian involvement would further complicate the situation, and Cairo's limit matches the one Ankara set on 8 October against attacking another state's soil.
UK Ministry of Defence
UK Ministry of Defence
The MoD said on 20 October that RAF Typhoons over Saudi Arabia will not strike the Houthis, but extended tanker support to Saudi operations including against Houthi targets in Yemen. The tanker line sets no limit on strikes, so British aircraft may now refuel Saudi jets on bombing runs.
Turkey
Turkey
Ankara sent the Mecca Joint Defence Agreement to parliament around 20 October, and its published text treats an attack on one party as an attack on all. Article 16 brings it into force only on the last ratification, so the 5 October invocation in Riyadh could not yet bind Turkey.

Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Editorial standards.