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Iran Conflict 2026
18MAY

Brent bounces; ship insurers stay put

4 min read
14:44UTC

Brent crude rose 1.63% to $98.83 on Tuesday 26 May as the Bandar Abbas strike put a risk premium back into oil, while Lloyd's of London left its Hormuz war-risk designation unchanged.

ConflictDeveloping
Key takeaway

Oil futures traded the talk; ship insurers held out for the signed paper that does not yet exist.

Brent Crude, the benchmark that prices roughly two-thirds of internationally traded oil, rose 1.63% to $98.83 a barrel on Tuesday 26 May, reversing part of Monday's slide below $100⁠1. Deal optimism had stripped a risk premium out of the price; the strike on Iran's naval base put some of it back. A week earlier Brent had touched a conflict high of $112.10, so the bounce sits well below the war's peak even as it undoes part of Monday's fall.

Lloyd's of London, the specialist insurance market founded in 1688, moved the other way, or rather did not move at all. Its Joint Hull Committee held the Hormuz war-risk designation unchanged, with cover priced at $10-14m a voyage. The split runs on plumbing, not sentiment. Futures traders reprice on a headline within minutes, because a contract settles in cash and carries no obligation to inspect the strait. A war-risk de-listing is bound by reinsurance treaty terms that hard-code the trigger: a UN Security Council resolution or a government certification letter.

A verbal understanding does not clear that bar. So insurers price the absence of signed paper while futures price the presence of talk, and the spread between them is the cleanest live reading of how thin the deal optimism really is. Until an instrument exists, tanker owners keep paying the premium whatever the screen says, and Gulf producers see no relief on the cost of moving their own crude.

The practical effect reaches past the trading desk. Petrol prices stay volatile while Brent ranges either side of $98, and shipping costs that feed into the price of imported goods stay elevated for as long as the war-risk designation holds. The market is trading a deal that, on the insurers' reading, has not yet been written down anywhere.

Deep Analysis

In plain English

The price of oil (Brent Crude) rose 1.63% on 26 May to $98.83 a barrel, partly because US forces bombed an Iranian naval base the day before, which traders took as a sign the conflict was getting worse again. At the same time, Lloyd's of London, the world's oldest and most important maritime insurance market, refused to change its ruling that the strait of Hormuz is a "war-risk zone". This designation forces any Western shipping company sending a tanker through the strait to pay an extra $10-14 million per voyage in insurance costs. The interesting split is this: oil traders moved the price in minutes because they reacted to the news. Lloyd's would not budge because their rules require a signed government document, like a United Nations resolution or a letter from a government certifying the conflict is over. No such document exists, because the US has signed no formal agreements on this conflict at all.

Deep Analysis
Root Causes

The futures-insurance split has one mechanical cause: the two markets use different evidence standards. Futures traders price on probability distributions drawn from public information, Trump's Truth Social posts, Rubio's timeline shifts, the Doha talks continuing despite the Bandar Abbas strike. Lloyd's Joint Hull Committee needs documented evidence of a formal governance change: a signed agreement, a government certification, or a UNSC resolution. None of those documents exists for Hormuz.

The White House produced zero signed Iran executive instruments across the entire conflict through 25 May 2026. Every US operational announcement came via Truth Social posts, which no insurance regulator treats as a qualified government instrument. Until a sitting US official signs a certification letter addressed to Lloyd's, the Committee cannot act, and no such letter has been drafted.

What could happen next?
  • Consequence

    The futures-insurance split means oil price relief from any verbal deal announcement will be partial and temporary until Lloyd's receives a qualifying government instrument.

    Short term · Assessed
  • Risk

    If a mine or IRGC action hits a vessel at Hormuz before the Joint Hull Committee acts, war-risk premiums reprice sharply higher and could push Brent toward the $112 conflict high.

    Immediate · Assessed
  • Meaning

    The Lloyd's mechanism functionally means a Trump Truth Social post announcing a deal cannot lower insurance costs for Western carriers, only a signed executive instrument or UNSC resolution can do that.

    Medium term · Assessed
First Reported In

Update #108 · US strikes Bandar Abbas as deal talk stalls

Trading Economics· 26 May 2026
Read original →
Causes and effects
This Event
Brent bounces; ship insurers stay put
The gap between a futures market that repriced within minutes and an insurance market that did not move at all measures exactly how much deal optimism is backed by paper rather than talk.
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.