Week 40

Iran's hold on Hormuz has always been the cheapest thing it owns. Closing the strait is a decision, not a construction project, and Tehran has advertised that it can be undone in seven days, which is exactly why Qalibaf can afford to list conditions.

The money is the opposite story. Iran's oil exports have been zero since the American naval blockade began in July, its security chief told a government meeting on October 3 that the country is in one of the hardest periods in its history, and public workers are resigning over wages they cannot live on.

So the week produced two blockades facing each other. Tehran's costs the Gulf and its customers money every day it holds. Washington's costs Tehran the one thing it needs in order to keep holding.

The argument that Iran's grip is breaking rests on the tankers moving again. Gulf exports are back to nearly 70 percent of prewar volume, and that number is doing a lot of work in Washington.

Look at how the oil moves. Most of it goes around through the Red Sea, Suez and the Arabian Sea at roughly five times the prewar freight, under escort from two American carriers, while Iran has logged at least seven strikes on ships inside the strait since September 28. The volume measures the cost of going around, not any loss of Tehran's ability to shut the door.

The detour runs through the Houthis. Hormuz shut pushed Saudi exports onto the Red Sea route, and the Houthis now hold Mokha and Perim Island at the Bab al-Mandab exit, hit Yanbu on the coast, and on October 3 set an Aramco refinery in Riyadh on fire. One Iranian-backed force now sits on the only corridor Saudi oil has left, and it got there without Tehran firing a shot.

That is the migration. Iran's lever did not break at Hormuz. It moved from the strait to the price of going around it, and from Iranian hands to Yemeni ones.

Riyadh is paying first. Saudi Arabia has lost both export routes at once, is importing French air defense for Yanbu because its own cannot absorb the salvos, and had its top cleric declare the fight against the Houthis a religious duty, which is what a government does when its military options are narrow.

The pact Riyadh built with Pakistan and Turkey met its first live test and answered with a meeting. On October 2 Islamabad said the three would gather in Riyadh to weigh an Iranian suggestion of talks with the Houthis instead of strikes, which recasts Tehran from the Houthis' sponsor into the broker Saudi Arabia needs.

Britain is paying next. A plot by hired men carrying gasoline and no explosives was enough to move every American B-1 bomber out of RAF Fairford on October 4, and two Iranian nationals were charged in Manchester days earlier over a plot against Jewish targets.

The method is the point. Iran runs these operations through criminals recruited online and paid in cryptocurrency, so a failed arson produces no expelled diplomat and no cause for war, and still pushes the cost of hosting American aircraft onto British voters. Germany and Italy host the same aircraft and are reading the same lesson.

Washington's blockade needs no new law to tighten. The Treasury has been warning third-country banks and airlines off Iranian business one at a time, and most have left on their own, so Iran's trade now runs through a shrinking set of Chinese and Russian channels that can name their price.

The bill lands on the people who hold the regime up. Oil revenue is what pays Iran's soldiers, pensioners and subsidies, and when it stops the state does not fall. It stops paying, which is the slower and more dangerous version.

Tehran knows which clock it is on. The government jailed a prominent hardline lawmaker on October 3 to protect the negotiating track, which tells you the people who want a deal are in charge, and that they have to jail their own supporters to stay there.

Washington's clock is political rather than fiscal. Trump has said bombing resumes after the November midterms, so the dated window on the American side runs on an election, while the window on the Iranian side runs on how long unpaid pensioners stay home.

Three things decide whether the standoff moves before November. The first is Qatar, which is now the only channel carrying terms between the two capitals, and whose own gas exports ride the same waterway Tehran is holding shut.

The second is Riyadh's answer to the Iranian offer on the Houthis. If the pact accepts a political track, Saudi Arabia will have traded a strike coalition for a restraint mechanism with Tehran in the chair, and the Red Sea pressure on Saudi exports eases on Iran's terms rather than Washington's.

The third is Baghdad. The American army left Iraq on September 30, the militia disarmament deadline passed the same day with nothing behind it, and Washington now licenses Iraq's pilgrim flights to Iran, 40 a day to Najaf, in the same meeting where it asks Baghdad to disarm Iran's friends.

What is being decided is not whether Iran can keep Hormuz shut. The strait is the only thing Tehran has left to trade for an end to the blockade, and the blockade is what makes the strait too expensive to keep.