Chronicle · Geopolitics
The Customs Post in the Strait
Picture a two-lane motorway. The only one in the entire country. A third of the oil the world moves by ship goes through it. And since February, there has been somebody at the toll booth.
August 4, 2026 · Reading ≈ 11 min · Jules Thomas
We spent five months wondering whether Iran was going to close the Strait of Hormuz. Meanwhile, it passed a law that bills for it: two million dollars per ship, payable in yuan or cryptocurrency, and passage barred at any price for any vessel linked to the United States or Israel. A closed strait earns nothing. A tolled strait earns every single day.
This is not a metaphor. On July 14, a wire report announced that Donald Trump was "dropping the Strait of Hormuz passage fees". To drop a toll, you have to have started by installing one. Nobody picked it up.
Here is the story. It is worth ten minutes.
Where it is, and why six kilometres are enough
Thirty-three kilometres at its narrowest. That sounds wide, until you look at what goes through it: a loaded tanker is 300 metres long and draws 20 metres of water. It does not park, it does not turn sharply, it does not stop within two kilometres. So the ships follow two lanes of three kilometres, one in, one out.
Six usable kilometres. For a third of the world's seaborne oil. And the only two states on that bottleneck are Iran and Oman.
This is not the first time. And the first time, it worked.
The 1980s. Iran and Iraq are exhausting each other in a trench war and decide to sink each other's ships. It is called the tanker war: four hundred vessels hit.
Kuwait, which has nothing to do with it, watches its tankers blow up. It then has an idea of disarming simplicity: it asks the Americans to repaint eleven of its ships in the colours of the United States. Same hull, same oil, different flag. Hitting one of them becomes hitting America. The operation is called Earnest Will.
On April 14, 1988, the American frigate Samuel B. Roberts strikes an Iranian mine. Four days later, the US Navy destroys a large part of the Iranian navy in a single day: Praying Mantis. The attacks stop.
Why did it work? Because we knew who laid the mine.
Hold on to that. Everything else follows from it, and from the fact that today, nobody knows anything about anybody.
The sequence, from February to today
Brent price, the European benchmark. A dash means no level was recorded that day.
Look at the value at the end of each line. Between 102 and 166 dollars, on announcements, denials, threats and climbdowns. This is not a market pricing a risk, it is a market with no reliable information at all, buying the latest headline.
The TACO, and why it costs more and more
Traders have a word for the Trump method: TACO, for Trump Always Chickens Out. He announces a strike, the Gulf allies call, the strike is cancelled.
It has happened often enough to become a financial product: you sell the fear when he threatens, you buy it back when he retreats. There are now people who make a living betting that a president will not do what he announces. And Wall Street has invented the pessimistic counterpart, the NACHO trade: Not A Chance Hormuz Opens, whatever he announces.
That is the real cost of the TACO, and it does not show up in a poll. Announce a strike that never comes often enough, and you get a market that stops paying for the announcement. Look at the three fear thermometers, read at the time of writing.
The percentage beside each price is the figure that counts: it says where that price sits within its range over the last forty-five days. Zero percent is the low of the period; one hundred percent, the high. The world's two safe havens are in the bottom quarter. Fear is no longer selling.
The point everyone missed: there are two tolls
This crisis gets told as though Iran were closing and the West enduring. That is false, and the facts of May say it better than any analysis.
But before the facts of May there is a text, and it is the text that changes everything. On March 30, the Iranian parliament passed a law. Not a threat, not a press release: a law, with articles and a tariff.
Read that last sentence again. A toll where some customers cannot pay is not a toll: it is a sanction. For twenty years, the West barred Iran from the banks. Iran now applies the same principle to a three-kilometre lane one bank of which it holds. The symmetry is too perfect to be an accident.
And the choice of currency is no accountant's detail. The dollar is Washington's last real grip on the Iranian economy: as soon as a transaction touches an American bank, it can be frozen. A toll collected in yuan and cryptocurrency escapes that grip. Every ship that pays takes, without meaning to, one small step out of the dollar.
Once you know that, the facts of May stop being anecdotes. They are applications.
- Iran lets certain vessels through under "special arrangements". Not all. Certain ones. It chooses.
- The United States authorised three Chinese tankers loaded with Iranian oil to sail out during the Beijing summit. They choose too.
- Trump instituted passage fees, then dropped them on July 14. A toll, in the literal sense, billed.
A gift. Ten ships get through, and there you have a courtesy between heads of state. We used to give horses; now we give navigation slots. It is the clearest admission in the whole affair: passage is no longer a right, it is a present somebody makes you.
Trump also declared it would be an "honour" to keep the strait open for China and the other countries that depend on it. He offered to have the US Navy escort ships "if necessary". The Revolutionary Guards publicly dared him to do it.
On August 4, Iran itself says what this is about
While I was writing these lines, two wire reports landed the same day. They are worth all the commentary in the world.
The first comes from Doha. The Qatari foreign ministry spokesman confirms that talks are under way with all parties and that Qatar is seeking a diplomatic outcome. Remember the map: Qatar is the country with no other way out, not even an emergency pipeline for its gas. This is not a disinterested mediator, it is a polite hostage.
The second comes from Tehran, and it is blunter. Mohsen Rezaei, a military adviser, states that Iran "will not stand by without reacting" to the American naval blockade, and that warships taking a route "deemed illegal" will be targeted. Then this sentence:
"Iran will under no pretext authorise any passage other than the one controlled by Iran."
That is no longer an interpretation. It is the programme, stated by the party concerned.
And he adds a detail almost nobody picked up: he accuses Washington of not honouring the memorandum signed in June. A memorandum. In other words, there exists a written document organising who passes and how. You do not sign a memorandum about an international strait, for the same reason you do not sign a contract to breathe.
What is dying at Hormuz: the commons
Since 1945, the world maritime order has rested on an American idea, guaranteed by the American fleet: the high seas belong to nobody and everybody passes through. That is freedom of navigation. It is what lets a Korean container ship cross the Suez Canal without asking anyone's permission.
That idea was never generous, it was self-interested, and that is precisely what made it solid: a sea power gains from routes being open to all, because it trades more than the others and it holds the sea. The commons and enlightened self-interest coincided. That is rare. It lasted eighty years.
When the United States bills for passage, even briefly, it stops being the guarantor of the commons and becomes one toll keeper among others. When it authorises three Chinese tankers during a summit, it uses the route as a bargaining chip. When Iran grants "special arrangements" and Beijing gets a lane while Baghdad has to come and negotiate, the sea stops being a space and becomes a counter.
China, for its part, has had nothing to do. It buys discounted Iranian oil, it gets its passages, and it watches the power that guaranteed the rule putting a price on it. Moscow does the same arithmetic: every barrel blocked at Hormuz is a Russian barrel sold dearer, and every American retreat is a free demonstration.
Why this time is different
In 1988, when a mine exploded, we knew where it came from. Today, we do not.
Since February, navigation systems have been jammed: more than a thousand ships affected, up to six hundred disruptions in twenty-four hours. Off the Emirates, control screens showed vessels racing toward the strait, on routes those vessels were not taking. They were not there.
And nobody knows who is jamming. Some accuse an Iranian base. Others suspect the Gulf states themselves, blinding signals around their terminals to protect against drones. Both hypotheses hold up, and that is exactly the problem.
No attribution, no retaliation. No retaliation, no deterrence.
That is what "hybrid war" means. A complicated phrase for a simple idea: you can now do somebody a great deal of harm without their being able to prove it was you. And a power that cannot prove cannot strike back, because striking back at random amounts to declaring war on an innocent.
A jammer costs a few thousand euros. Praying Mantis cost a fleet.
How to know what is really happening
Statements lie, markets much less: they have no opinion, they have money at stake. Three figures, read today at a broker.
Gold and the yen are the two vaults money hides in when people are afraid. Both are down.
The market is buying oil. It is not buying fear.
In other words: it treats Hormuz as a supply problem, not as the start of a world war. The barrel rises because Iraq produces four times less, not because anyone dreads the apocalypse. It is a tap problem, not a powder keg.
The safety net tearing
There is a reason Hormuz has not blown up the world for fifteen years, and it is not diplomatic. It is Texan.
From 2010, American shale oil made the United States a net exporter. So the market had a shock absorber: if the Gulf seized up, America pumped more and the price fell back. That net defused every strait crisis since.
And that net is tearing. Since June, American exports of crude and refined products have fallen by around 1.5 million barrels a day, alongside a decline in production and in the rig count.
The less America can compensate, the more control of Hormuz is worth.
That is arithmetic and it is not negotiable. The power of whoever holds the bottleneck does not depend on his fleet, it depends on the existence of an alternative. Every American barrel that disappears raises the value of the toll without anyone having to fire a shot.
And that qualifies what I said above. The market is not buying fear yet, true. But it has good reason to start buying some soon: the cushion it has been resting on for fifteen years is quietly deflating, while everybody watches the press releases.
So, should we worry?
Not in the way we are being told.
The "Iran closes Hormuz and the world collapses" scenario has been selling for forty years. It has never happened, and it probably will not, because it earns nothing for whoever triggers it. A closed strait earns nothing and eventually attracts a fleet. A strait whose access you control earns every single day.
The real subject is duller, therefore less told, and far more serious: a major trade route changed status without anything being signed. It went from a commons to an administered resource. And the tool that made that possible is not a missile: it is a jammer that makes attribution impossible, and a leader who has learned that passage can be billed.
What was demonstrated at Hormuz is reproducible. Malacca, Bab el-Mandeb, the Bosphorus, the Panama Canal: the same bottlenecks, the same two lanes, the same impossibility of proving who is jamming.
- Official strait volumes: the American Energy Information Administration (EIA) publishes transit figures and updates them. Search "EIA Strait of Hormuz oil transit" on eia.gov.
- British parliamentary briefing on the reopening of the strait and the 2026 conflict: researchbriefings.files.parliament.uk (CBP-10636, PDF).
- Real tanker traffic: Argus Media counts the daily transits. It is the best rebuttal to the statements, in both directions.
- The precedent of 1984-1988: search "Operation Earnest Will" and "Operation Praying Mantis". Without it, the current crisis is unreadable.