Three Supply Signals That Don't Fit the Hormuz Squeeze Narrative
A surprise inventory build, record U.S. exports, and partial — not total — Hormuz disruption complicate a market trading close to its July crisis peak.
Tanker traffic through the Strait of Hormuz slowed further over the weekend of August 15-16, extending a run that had already given oil a 5% weekly gain in the week of August 10, aided by fresh attacks on tankers in the Persian Gulf. ICE Brent crude front-month stood at $91.65 at the close on August 19 — about 8% below the $100 Brent reached when tensions peaked on July 23.6,3
The supply anxiety has a credible foundation. Before hostilities began, roughly 20% of the world's oil and liquefied natural gas moved through the strait, and the collapse of the U.S.-Iran ceasefire has kept that statistic at the centre of market thinking. But S&P Global Commodities at Sea data tell a more ambiguous story.5
Ten crude tankers carrying Iraqi crude successfully exited Hormuz during July, transporting around 648,000 barrels per day — down 27% from 883,000 barrels per day in June.4 That decline is significant. It is not a sealed strait. And as the session on Tuesday August 4 demonstrated, even the hint of de-escalation can move prices hard: reports of peace-talk progress drove Brent down roughly 5% that day, with the contract closing below $80 for the first time since the conflict began.5
The inventory data cuts against the supply-squeeze thesis more directly. EIA data released on Wednesday August 5 showed U.S. crude stockpiles rose by 2.5 million barrels to 407 million barrels in the week ending July 27, against analyst expectations of a 1.5 million barrel draw.5 A 4 million barrel swing to the upside, while the strait is supposedly disrupted, suggests either softer demand or alternative supply routes absorbing more of the shortfall than the price level implies.
American export volumes add further texture. EIA data show total U.S. crude oil and petroleum product exports reached a record 13.6 million barrels per day in April, 15% above the previous monthly record. Crude alone accounted for 5.6 million barrels per day; propane exceeded 2 million barrels per day for the first time in the agency's monthly data.7 April predates the worst of the Hormuz disruption, but the scale of U.S. supply available for redirection is material context for a market pricing a severe squeeze.
The bearish case has genuine vulnerabilities. The Caspian Pipeline Consortium — the main export route for Kazakh crude — repeatedly suspended operations during the week of August 3 due to safety concerns and a lack of tankers, multiple trading sources said.5 That is a secondary route under simultaneous pressure, compounding rather than offsetting the Hormuz shortfall. Iran has also threatened to close "all other export corridors that benefit the US and its allies," broadening the scope of potential disruption well beyond the strait.2
President Trump urged Americans to accept higher gasoline prices for the duration of the conflict, Reuters reported.7 RBOB Gasoline futures sat at $3.21 per gallon and Heating Oil at $4.45 per gallon as of August 19. Sustained prices at those levels eventually trim end-use demand, and demand destruction surfacing inside a supply scare rarely gets priced in until it arrives in the data.
Saul Kavonic, senior energy analyst at MST Marquee, told Bloomberg that while the latest developments are escalating, they remain "well below a state of open war."1 IG analysts said the talks' central sticking point is Iran's demand for a degree of control over the waterway and U.S. refusal to accept that outcome.5
Weekly EIA inventory figures are the clearest near-term test. A second consecutive surprise build would be difficult for bulls to reconcile with a genuine physical squeeze. The more telling figure is August tanker flow data from S&P Global, which will show whether Iraqi throughput dropped further below July's 648,000 barrels per day or began to stabilise. That number, more than the daily price ticker, will indicate how much of the current premium reflects actual supply loss and how much reflects fear of what has not yet happened.4