Strategic oil stocks drain as Strait of Hormuz closure stretches into fourth month
Emergency reserves are falling fast, with Gunvor warning tank bottoms could hit within weeks.
Brent crude front-month sat at $85.26 a barrel early on Wednesday (2026-07-15), down 0.16% from the prior close, as traders weigh dwindling strategic stockpiles against the prolonged closure of the Strait of Hormuz. The price has shed about $5 since early May, when Iran’s foreign minister declared the waterway “completely open” and ICE Brent tumbled 10% in a single session on April 17th.6 [LIVE_PRICES]
That mattered because the strait carried 21 million barrels per day in 2022 — roughly 21% of global petroleum liquids consumption — and roughly 82% of that crude and condensate went to Asian refineries.1 With the chokepoint still largely shut more than two months after the US-Israel campaign against Iran began, the market is living off stored barrels.3
The US, China and Japan hold the bulk of the world’s strategic oil inventories. In March 2026, the US and other IEA members agreed to a coordinated emergency release, drawing on reserves originally built after the 1970s oil shocks.8 But those releases are not infinite. According to EIA data, combined crude and product reserves have dropped 52 million barrels over four consecutive weeks of draws.3
Frederic Lasserre, head of analysis at Gunvor Group, told an industry conference in late April that if the closure drags on for another month, oil markets will effectively run out of stockpiles and hit “tank bottoms.”3 That projection came more than two months ago. The strait remains effectively closed.
Japan is feeling the pressure most acutely. The country imports roughly 90% of its crude, and the war in Iran has exposed deep structural vulnerabilities.2 Japanese refiner Idemitsu has already bought a cargo of Russian crude from Sakhalin, a sign that Tokyo is scrambling to diversify supply outside the Persian Gulf.4
India has blunted the shock partly through Chinese-mediated channels. US President Donald Trump said he is looking to make a “final determination” on extending the Iran ceasefire and reopening the strait, though no deal has materialised.7
Alternative routes exist but offer only partial relief. Saudi Aramco operates a 5-million-b/d East-West pipeline that was temporarily expanded to 7 million b/d in 2019. The UAE runs a 1.5-million-b/d link to Fujairah on the Gulf of Oman. Combined, effective unused capacity from these pipelines is around 3.5 million b/d — barely a sixth of normal strait throughput.1
Asia remains the biggest loser. In 2022, 82% of the crude and condensate that moved through the strait went to Asian markets.1 Without a diplomatic resolution, those flows will not return. The war has already reshaped energy security thinking across the region as governments confront the fragility of supply lines that were once taken for granted.5
The consensus among traders is bearish, with 69% directional weight pointing to lower prices and 14 signals stacking against crude. [CONSENSUS] Yet one contrarian signal — Brent front-month demand — runs bullish with 0.70 confidence. [CONTRARIAN] That tension captures the market’s real dilemma: falling stocks argue for higher prices, but a ceasefire could collapse the risk premium overnight.
The cross-sector links are clear. Chinese demand growth pushes JKM Asian LNG up, which lifts Brent and then Newcastle coal. An SPR release pushes WTI down and Brent down, but diesel up. [CROSS_SECTOR] In a market where the physical buffer is measured in weeks, the next catalyst is not a data release — it is a political decision in Washington and Tehran.
What to watch: Lasserre’s tank-bottoms timeline. If the strait remains shut through August, stockpiles will be functionally empty for the largest Asian importers.3 The price signal from a forced refinery run-cut would be sharp and immediate.