The Strait of Hormuz only 33 kilometres wide at its narrowest point has for four months been doing what no sanctions list, central bank or summit could achieve alone. It brought home to all a realization of the insignificance of the control of anyone's share of the world economy.

Oil prices were about one percent lower on the day, with Brent crude trading around $72 a barrel as U.S. and Iranian negotiators were swirling around a meeting this week in Doha. That's two stories in one number. It was around the level oil was on the eve of the outbreak of the war on 28 February and marks the poorest three-month quarter for the benchmark since the demand destruction in 2020, when oil fell by nearly a quarter. Prices have been in a near perfect circle. The world they went through on their journey has not caught up with them.

When you cut away all the noise and all the significance, the importance of this waterway can be embarrassingly simple. About one-fifth of the world's seaborne crude oil passes through it, at some point averaging 20 million barrels a day; as much as 30 per cent of the fertiliser-grade urea that underpins the price of bread and rice is traded through it, as well as about one-fifth of traded liquefied natural gas. There's no real replacement, nor there ever was. The Persian Gulf is a cul-de-sac with one narrow door, and this year, most of the time, that door was closed on the inside.

In late February, the United States and Israel launched an air campaign against Iran and Tehran did what its generals had threatened to do for a generation and never dared. Revolutionary Guard announced the closure of the strait, diverted ships and fired on any that did not obey and laid mines in the strait. High numbers of tanker crossings, at more than a hundred a day, dropped to trickle. Brent soared to $114 in late March, the biggest single-month volume gain ever recorded for the contract. The IMO later reported that some 20,000 seafarers and some 2,000 vessels had been stranded in the Gulf, 'hostages in all but name'.

The rest is the part that deserves more modesty and less than the forecasting industry normally puts on. None of the things everyone modelled, namely $200 oil, queues at the pump, a synchronised global recession turned out to be the case. Diplomatic efforts were unsuccessful: the market did the job. Saudi Arabia increased its crude pipeline capacity to the Red Sea by up to 2 mb/d. The UAE utilised the Habshan-Fujairah line, completely bypassing the chokepoint, to load tankers in the Gulf of Oman. American producers filled in some of the void, while China, the biggest consumer of Gulf oil and Iranian oil, just demanded less. When the shooting stopped, the dreaded shortage had quietly turned into an abundance. The risk premium that had given rise to the high prices has been reduced more quickly than the physical supply has been reduced.

The Islamabad Memorandum of Understanding, which was signed by Donald Trump and Iran's president Masoud Pezeshkian under Pakistani mediation on 17 June, was the formal offramp. Washington removed its naval blockade of Iranian ports the following day, and the US Treasury gave a temporary licence to waive sanctions on Iranian oil sales, until late August. Flows responded. Crude flows through the strait of Hormuz were approaching 4.8 million bpd by late June, the highest since the war began but still far from the 15 million which once flowed through it. More than two dozen tankers, each holding about 35 million barrels, were able to leave the Gulf after three months. By early July, regional flows could return near their pre-war level of about 23 million bpd, according to Goldman Sachs.

That's a positive ledger. The other one is still open, and last weekend proved it. A drone attack on an oil-laden tanker, Kiku, moving along with some two million barrels, led to US Central Command's attack on ten Iranian military facilities in and around the strait, and only then did both capitals accept, in the delicate language of an American official, to stand down for now. Within the next 24 hours, only a handful of commercial vessels came across, compared to the typically hundreds of vessels. Tehran has declared it would continue to patrol the waterway on its own terms if Oman refuses to co-manage it, and has been openly hinting that it will charge transit tolls later while claiming to have promised to withhold such fees for 60 days, and on Tuesday, its foreign ministry was actively denying direct talks with Washington were even scheduled. ING's strategists have been sounding a civilized wake-up call: traders seem complacent. Insurance underwriters are not: The war-risk premiums which were approximately 0.125 percent of ship's value prior to the war have stabilized at two to three times this amount, or a quarter to a half million dollars and more, per ship on a very large tanker.

The bad news behind the declining price graph. Iran was the loser in all but most conventional terms and still got the card they wanted the most. In practice, not in theory, it has shown it can choke the strait, force concessions to reopen it, and rewrite the rules of passage, from a corridor of its own choosing. The chokepoint that was once regarded as a worst case scenario for four decades has now become something others know how to do, whether it's the Houthis off Yemen, or the planners off to Malacca, Bab el-Mandeb or the Taiwan Strait. Indonesia's April proposal to charge tolls on the Strait of Malacca was an early warning that governments perched on the narrowest of the world's doors have cottoned on to their value.

The winner and loser were not where they were expected. The analysis of trade with a year earlier showed the largest gains came to the United States, which had its energy revenue increase by approximately $50 billion, and Russia, which increased its revenue by over $15 billion, but had almost no increase in trade volume. Iran, which also has a access to the strait, emerged the winner. Those Gulf monarchies that could not avoid the bottleneck, Iraq, Kuwait, Qatar and the Emirates, suffered revenue declines, and those blessed with pipelines and geography, Saudi Arabia and Oman, benefitted. The Gulf has learned that it can only do one thing: prepare the bypass before it's needed, as it's been doing since 2012.

This is no esoteric morality play on ‘big powers' for India. It's a human face to a balance-sheet issue. It imports over 85% of its crude, around 40-50% of which comes from Hormuz, and is the world's third largest crude oil importer and second largest consumer of LPG, cooking gas that powers the kitchens of tens of millions of people. The strait's seizure pushed the price of Indian crude in the basket up to $113 a barrel in March from $69 in February, and the imported oil dropped by around 14 percent to 4.5 million barrels a day, as cooking-gas lines began to queue up before the government opened a 24-hour control room to regulate piped gas. But only because refiners did what a vulnerable importer should: By June, the barrel had straightened back out, and imports were up to over five million barrels per day. They spread their wagers. Angola was briefly the number three supplier, Venezuela became number four and the UAE joined the fray by loading at Fujairah outside the chokepoint, while India quietly purchased Iranian crude and a cargo of Iranian LPG for the first time in seven years.

It's the final step that you should be keeping an eye on and it should reflect the bigger issue this episode should resolve. New Delhi rejected Washington's offer to become part of a US-led naval coalition to police the strait in favor of bilateral talks with Tehran to ensure safe passage. Whether it's called hedging, strategic autonomy, or simply the refusal to be conscripted into a conflict it did not choose, this is what it is. It's the right instinct and the crisis demands it. Any energy strategy that focuses on any single corridor, supplier bloc or currency arrangement is a strategy with a fault line running through it and the country with the most doors open was the one that survived this shock best. China, by contrast, has been dependent on Iranian oil for years, and has secured preferential passage early in the war even as Beijing chides Tehran over freedom of navigation and responds to U.S. pressure by tightening its own control of the South China Sea.

The strait has been reopened, albeit with certain modifications, under an American licence granted to Iran and with Iran's consent and for its duration, which is set to expire in eight weeks. The moving tankers are moving, the price has come home, and the capitals in capitals and trading desks will be tempted to put the whole thing in crises survived. This would be a costly error. It was never really about the spike markets absorbed it in an eerie hurry. The damage is the precedent. The world has been given a high-definition demonstration of how just one 21-mile stretch can choke the global economy and, most important, that the best investment against that is not a larger fleet of U.S. warships, but a broader map. More vulnerable than most, and subtler than most in reading the small print, India has started. There shouldn't have to be a second demonstration for the rest of the world.