The International Energy Agency on Wednesday put a date on the war premium. Even if the conflict ends in June and tankers begin moving through the Strait of Hormuz again, the agency's May Oil Market Report says the global market will remain "severely undersupplied" until October. [1] Global supply fell another 1.8 million barrels a day in April to 95.1 mb/d, taking cumulative losses since February to 12.8 mb/d. [2] Observed inventories drew at about 4 mb/d through March and April — the fastest pace the IEA has on record. [1]

The paper's account on Tuesday of Brent crossing $107 noted that the headline tape moves with each ceasefire rumour while the supply curve does not. The IEA's print sharpens that distinction. Brent retraced to about $105.89 on Thursday morning, down from $107.77 at Tuesday's close, but the agency's number is the same one whether crude trades at $95 or $115: 12.8 million barrels a day removed, three months of inventory drawing at unprecedented speed, more than one billion barrels of Gulf supply already gone.

Paris also moved the calendar. Aramco's chief executive Amin Nasser warned a week ago that any restriction past mid-June would slip normalization to 2027, and the paper noted on May 13 that no major sell-side bank had carried that horizon into research notes. The IEA's report does what those notes have not: it accepts the slow-recovery scenario in writing. Toril Bosoni, head of the IEA's oil markets and industry division, told Bloomberg TV that "even if there is a solution to the conflict, we do think it will take time — weeks and months — to resume flows through the Strait of Hormuz to a normal pace." [1] The agency now assumes flows resume "gradually" from June and that the market remains in deficit through the third quarter. [3]

What changed between the April report and this one is the shape of the loss. In April the agency wrote that crude flowing through the Strait had fallen to roughly 3.8 mb/d, compared with more than 20 mb/d in February. [4] In May it converted that into a stock number: 250 mb drawn from observed inventories over March and April. [3] Output from Gulf countries affected by the closure was 14.4 mb/d below pre-war levels in April. [3] Atlantic Basin producers — the United States, Brazil, Canada, Venezuela, Kazakhstan — increased exports by 3.5 mb/d since February, much of it now heading east. [3] The 600,000-barrel-a-day upward revision to Americas supply growth is the only line in the report that pulls in the direction of relief.

Refineries are the second-order signal. Crude throughput is forecast to fall by 4.5 mb/d in 2Q26 to 78.7 mb/d as Middle East refineries contend with infrastructure damage and Asian refineries run out of feedstock. [3] Margins remain at historically high levels — middle-distillate cracks at records — because product is scarce, not because demand is healthy. [3] Aviation fuel prices nearly tripled after Middle Eastern exports were cut off. Global oil demand is now expected to contract by 2.4 mb/d year-on-year in 2Q26, the steepest quarterly drop since the 2020 pandemic. [1]

The release of 400 million barrels from IEA strategic reserves, agreed in March, is now showing up in the inventory numbers as the buffer the agency designed it to be — but a buffer that draws down by definition. Bosoni's framing makes the point clear: the longer the disruption holds, the faster inventories decline, the more pressure on prices. [1] The agency's annual 2027 outlook, delayed from April because of the war, will publish next month — and will arrive with a forward curve that no longer assumes the missing barrels return on a press conference.

Executive director Fatih Birol said something earlier this week that Wednesday's report quietly ratified. Speaking in Vienna, Birol said that even if the Strait reopens, "the vase has been broken. You can't glue it back together." [5] That is the diplomatic register. The May Oil Market Report is the accounting register: October at the earliest, June assumption only if everything resumes, and four mb/d coming out of storage every day until then.

The IEA's adoption matters because of what was missing before it. The paper noted last week that Aramco's 2027 normalization horizon was a producer warning the sell-side had not yet adopted. With Wednesday's report, the agency that runs the strategic reserve release programme has now adopted it. The producer and the consumer-side institution agree on the calendar. Where the sell-side ends up on the curve is the question for the rest of the spring.

-- DARA OSEI, London