Hormuz Is Turning the Iran War Into an Inflation War

The most dangerous weapon in the Gulf right now may be the insurance invoice. Missiles still matter, and ships still need escorts, but the Iran war has already spilled into a more familiar political battlefield: gasoline prices, airfares, energy bills and central-bank anxiety.

I think the United States is at risk of misreading this fight. The Strait of Hormuz, the narrow passage between Iran and Oman that links the Persian Gulf to the Arabian Sea, is not just a place where navies maneuver. It is a pricing machine. In 2025, an average of about 20 million barrels a day of crude oil and oil products moved through it, roughly 25 percent of world seaborne oil trade, according to the International Energy Agency¹. The same IEA factsheet says about 93 percent of Qatar’s LNG exports and 96 percent of the UAE’s LNG exports transit Hormuz, equal to 19 percent of global liquefied natural gas trade. When that passage becomes uncertain, the shock does not wait for a formal blockade. It shows up first in premiums, schedules, bids and expectations.

That is why I would call this, already, a supply-chain war. Not because Iran’s tools are peaceful. They are not. The Islamic Revolutionary Guard Corps Navy, Iranian-backed proxies, mines, drones, missiles and seizures are instruments of armed coercion. But the pressure point is commercial. Tehran does not have to win a fleet battle to create political pain in Washington, Tokyo, New Delhi or Berlin. It only has to make enough traders, shipowners, insurers and airlines behave as if the next cargo might be the unlucky one.

The mechanism is old, but the current version is brutal. The U.S. Energy Information Administration said in its May 12, 2026 Short-Term Energy Outlook that global oil markets are in “heightened volatility and uncertainty” because of the de facto closure of Hormuz, through which nearly 20 percent of global oil supply flowed before military action began on February 28, 2026. The EIA said Brent crude averaged $117 a barrel in April, $46 above February’s average, and that daily Brent prices reached $138 on April 7 as the closure produced cascading oil-supply-chain effects in global markets². That is not a side effect. That is the battlefield transmitting force into politics.

The inflation data now make the point in household language. The Bureau of Labor Statistics reported that U.S. consumer prices rose 0.6 percent in April 2026 after a 0.9 percent March increase, with the 12-month CPI rate reaching 3.8 percent. Energy rose 3.8 percent in April and accounted for more than 40 percent of the monthly increase, while gasoline was up 5.4 percent for the month and 28.4 percent from a year earlier, according to the April CPI release⁴. The OECD reached the same conclusion from the macro side: its March 2026 interim outlook said a halt in shipments through Hormuz and damage to energy infrastructure had pushed up energy prices, and it projected G20 inflation in 2026 at 4.0 percent, 1.2 percentage points higher than previously expected in its interim outlook⁵.

This is the part of war planning that often gets treated as background music. It should be treated as the scorecard. The IEA’s 32 member countries agreed on March 11 to make 400 million barrels of emergency oil available, the largest coordinated stock release in the agency’s history, after the war sharply impeded Hormuz flows and pushed crude and refined-product exports below 10 percent of pre-conflict levels, according to the IEA announcement³. Governments do not release 400 million barrels because they are worried about symbolism. They do it because supply chains have become a strategic front.

Iran has practiced this style of coercion for years. The U.S. Maritime Administration warned in 2024 that recent incidents included Iran’s April 2024 seizure of a Portuguese-flagged vessel in the Strait of Hormuz and its January 2024 seizure of a Marshall Islands-flagged vessel in the Gulf of Oman in a maritime advisory⁹. The U.S. Navy said in July 2023 that Iranian naval vessels attempted to seize two merchant tankers in international waters, fired on one tanker, and withdrew after U.S. forces responded; the Navy also said Iran had harassed, attacked or seized nearly 20 internationally flagged merchant vessels since 2021 in its account of the incident¹⁰. In the Red Sea, U.S. Central Command said a Defense Intelligence Agency report found that Iranian aid enabled Houthi missile and drone attacks against commercial shipping beginning in November 2023 through Iranian-supplied systems and training¹¹.

That pattern matters because markets move on probabilities. In June 2025, before Hormuz was blocked, Brent rose from $69 to $74 a barrel in a day amid regional tensions, while the EIA stressed that Hormuz flows had few alternatives in its chokepoint analysis⁶. Reuters reported the same month that war-risk insurance premiums for Middle East Gulf shipments jumped to about 0.5 percent of a ship’s value from roughly 0.2 to 0.3 percent a week earlier as Hormuz risks grew⁷. Reuters also reported that airlines were avoiding Iranian, Iraqi, Syrian and Israeli airspace and routing north via the Caspian Sea or south via Egypt and Saudi Arabia, accepting higher fuel and crew costs and longer flight times because of regional airspace risk⁸. This is what coercion looks like before it looks like conquest: a tax on movement.

The strongest objection is serious. Iran cannot close Hormuz forever without hurting itself. The Congressional Research Service reported that nearly all Iranian petroleum exports since 2021 have gone to China and that Iranian exports reportedly hit a record in early 2024, with “almost all” going to China despite U.S. sanctions¹². The IEA says Iran, Iraq, Kuwait, Qatar and Bahrain rely on Hormuz for the vast majority of their oil exports, and that Iran’s Jask terminal, often discussed as a bypass route, is not a viable crude-export option because it remains effectively non-operational¹. A sustained disruption would anger Asian customers, cut into Iran’s own revenue and invite more military pressure.

That objection proves less than it seems. A weapon does not have to be sustainable forever to be useful. A strike does not have to last six months if two months are enough to raise U.S. gasoline prices, complicate Federal Reserve policy, force emergency stock releases and split allies over escalation. Iran’s leverage is not the ability to hold the world economy hostage indefinitely. Its leverage is the ability to impose a high, uncertain, politically visible cost while keeping the ladder of escalation muddy.

The redundancy argument also has limits. Saudi Arabia and the UAE do have routes that bypass Hormuz, and the IEA estimates 3.5 million to 5.5 million barrels a day of pipeline capacity could potentially redirect crude flows around the strait through Saudi and Emirati systems¹. But that is small next to roughly 20 million barrels a day of oil and products normally moving through Hormuz, and the IEA says a prolonged disruption could also make unavailable much of the world’s spare crude-production capacity, most of it held inside the Gulf behind the same chokepoint¹. For LNG, the problem is worse: the IEA says there are no alternative routes to bring Qatari and UAE LNG to global markets at short notice, and that losing almost 20 percent of global LNG supply would force demand adjustments in key Asian and European markets under a Hormuz disruption¹.

So Washington needs a different hierarchy. Deterrence is necessary, but it should be judged by whether it lowers commercial risk, not by whether it looks muscular on television. Naval escorts, mine countermeasures, intelligence sharing and clear consequences for attacks can reassure markets if they make transit safer. But broad blockade language, ambiguous red lines and highly publicized military signaling can also raise the perceived odds of closure, which is exactly the premium Tehran wants the world to pay.

I do not mean that the United States should let Iran set policy by threatening ships. I mean the opposite: deny Iran the payoff. The right package is (1) hard protection for actual transit, including escorts where needed, (2) quiet crisis channels through Oman, Qatar or other intermediaries to reduce miscalculation, (3) coordinated insurance and information tools so shipowners know what routes, escorts and reporting channels reduce risk, (4) stock-release coordination and demand-restraint planning with allies, and (5) sanctions enforcement aimed at the networks that fund coercion without turning every tanker encounter into a headline confrontation. If the metric is only “did we punish Iran,” Washington can win a news cycle and lose the market. If the metric is “did flows resume and prices fall,” the strategy becomes harder but saner.

The next indicator I would watch is not a speech from Tehran or Washington. It is whether regular Hormuz transits resume before the EIA’s next Short-Term Energy Outlook on June 9, 2026, and whether Brent moves decisively below $90 by July. If Hormuz traffic remains choked into late June, I expect April’s inflation reading will not be the peak of the political pain. If ships move, insurance softens and airlines reopen shorter routes, the war will still be dangerous, but its most immediate global weapon will start losing power.