Hormuz at 70% Is The New 100%

Saturday, May 30, 2026 · 11:09 PM

Oil tanker traffic through the Strait of Hormuz may not return to prewar levels even if the U.S. and Iran reach a deal, and the market hasn't priced this in yet. Brent settled Friday at $91.89, down from $100 when talks stalled, because traders are betting on a full reopening. They're wrong. Traffic might return to 60% to 70% of prewar volumes, with China-affiliated ships moving freely while Western vessels require bilateral agreements with Iran, according to Lloyd's List editor Richard Meade. That 30% haircut to the world's most important oil chokepoint isn't a disruption—it's the new baseline.

Helima Croft at RBC told clients Thursday that any end to the conflict leaving Iran exercising operational control over the Strait will result in appreciably lower flows. She's right, and here's why it matters more than consensus thinks: Until the U.S.-Israeli war against Iran, about 25% of the world's seaborne oil trade and 20% of the world's liquefied natural gas passed through Hormuz. More than 1 billion barrels of oil have been lost due to the strait's closure, with nearly 100 million additional barrels lost every week Hormuz remains closed, ADNOC CEO Sultan Ahmed Al Jaber said Wednesday. The physical oil that doesn't flow through a 70%-capacity Hormuz has to come from somewhere else, and there aren't many somewhere elses left.

Shipping traffic has been largely blocked by Iran since February 28, 2026, when the United States and Israel launched an air war against Iran and assassinated supreme leader Ali Khamenei, prompting Iran to launch missile and drone attacks and lay sea mines in the strait, while the US simultaneously blockaded Iranian ports from April 13 to May 29. Negotiators reached a 60-day memorandum of understanding to extend the ceasefire and start negotiations over Iran's nuclear program, though President Trump still has to approve the deal. But even if Trump signs, it would likely take a long time to return to prewar levels given safety concerns about mines in the strait and severe risk the war could resume over the next year.

Shipowners will have to weigh the risk of fighting breaking out in the Persian Gulf again and the consequences of their vessels and assets being trapped on one side of Hormuz for months if war erupts again. Ship traffic in the Red Sea plummeted in early 2024 due to Houthi militant attacks, and two years later traffic still has not returned to previous levels. The Red Sea precedent is instructive: when a chokepoint closes violently, insurance underwriters and ship operators develop permanent risk aversion. War risk insurance has increased significantly since the fighting began on February 28, 2026, and those premiums don't disappear just because someone signs a ceasefire in Doha.

This reminds me of 1988, when the Iran-Iraq "tanker war" ended. Iranian forces laid mines throughout the Persian Gulf, including in the Strait of Hormuz, and Iranian and Iraqi forces each attacked the other nation's energy infrastructure and tankers carrying Gulf crude. It took eighteen months after the August 1988 ceasefire for insurance rates to normalize and traffic patterns to fully return. But 1988 had one key difference: both belligerents wanted commerce restored. Amos Hochstein told CNBC Thursday that "no matter what happens, the Iranians will control the Strait of Hormuz for the foreseeable future, it doesn't even matter what the deal says". Iran now has leverage it didn't have before February, and it knows it.

Consensus believes the Hormuz crisis is a temporary supply shock that resolves when diplomats shake hands. What consensus misses is that maritime insurance, corporate risk management, and shipowner psychology don't reset with a press release. ADNOC's Al Jaber said it will take at least four months to ramp oil flows to 80% of normal levels even if conflict ends immediately, and until Q1 or Q2 2027 for flows to fully normalize. That's the optimistic case. The biggest beneficiaries of market changes have been the United States, which saw exports increase and revenue rise about $50 billion, and Russia, which had steady exports and revenue increase more than $15 billion, according to New York Times analysis through May 8. The new oil trade geography favors non-Gulf exporters, and they have no incentive to see Hormuz return to 100% capacity.

Two things to watch: First, the UAE has built nearly 50% of a second pipeline bypassing Hormuz that will double ADNOC's export capacity through Fujairah, accelerated due to the Iran war and expected operational in 2027. When Gulf producers spend billions on alternative export routes, they're telling you Hormuz dependency is a permanent problem. Second, watch Chinese tanker activity versus Western flag vessels in June. If the split widens—Chinese ships transiting freely while European and American hulls stay away—that's your confirmation that we're now trading in a bifurcated oil world where access to 5 million barrels a day depends on your passport.