Picture this: somewhere in the Persian Gulf, a tanker the length of four football fields is sitting dead in the water. Its crew hasn’t moved in weeks. It’s carrying enough crude oil to fill two million car tanks. And it’s not going anywhere — not because of a storm, not because the engine broke down — but because of a strip of sea so narrow that in some places, you could theoretically see both shorelines.
That strip of sea is the Strait of Hormuz. And right now, it is the most consequential piece of geography on the planet.
A strait is simply a narrow channel of water connecting two larger bodies. The Strait of Hormuz connects the Persian Gulf — home to the world’s most oil-rich nations — to the Gulf of Oman and, from there, to global markets. At its narrowest, it is about 33 kilometres wide. Shipping lanes run through just a fraction of that: two corridors, each roughly 3 kilometres across, one for incoming vessels and one for outgoing. Through those two lanes, before this war began, passed roughly 20% of the world’s oil and 20% of its liquefied natural gas every single year — about 3,000 vessels a month, nearly 100 ships every day, carrying everything from fuel to fertilizers to petrochemicals.
The world didn’t just use this corridor. The world depended on it.
On February 28, 2026, the United States and Israel launched coordinated airstrikes on Iran under Operation Epic Fury, targeting nuclear sites, military infrastructure, and leadership. Iran’s Supreme Leader, Ali Khamenei, was killed. Within days, Iran launched retaliatory missile and drone strikes on US military bases across the Gulf — in the UAE, Qatar, and Bahrain. Then came the move that shook global markets: on March 4, Iran declared the Strait of Hormuz closed. Any vessel attempting to cross without Iranian permission would be considered a target. The Revolutionary Guard Corps began laying sea mines, boarding ships, and firing on tankers. Shipping companies pulled out immediately. Insurance premiums for a single transit shot up to levels that made voyages commercially unviable. Traffic collapsed to about 5% of pre-war levels — in the entire month of April, just 191 vessels crossed, compared to roughly 3,000 in a normal month.
The obvious question is: why can’t someone just force it back open? The US has the world’s most powerful navy. The answer is more complicated than it seems. Iran’s threat doesn’t come primarily from warships in the water — it comes from drones and missiles that can be fired from positions deep inside its territory, from mountains overlooking the strait, from hundreds of kilometres away. A naval escort can intercept incoming missiles. It cannot eliminate the threat entirely. And the moment a single escorted tanker gets hit, shipping confidence collapses all over again. There’s also the standoff logic: the US imposed its own counter-blockade of Iranian ports in mid-April. Iran won’t open the strait unless the blockade lifts; the US won’t lift the blockade unless the strait opens. Each side believes the other will crack first. Neither is cracking.
When people hear “oil disruption” they immediately think of petrol prices, and yes, Brent crude went from $73 a barrel in late February to over $117 by April — the largest monthly oil price surge ever recorded happened in March 2026. But oil is just the beginning. About 30% of the world’s internationally traded fertilizers normally transit the Strait of Hormuz. No fertilizer flowing means crops become more expensive to grow, which means food becomes more expensive to buy. LNG disruption ripples into electricity prices across Asia. Petrochemical shortages affect plastics, medicines, and manufactured goods. For Asia especially, the damage is severe — about 84% of oil exiting through Hormuz is headed for Asian markets, and countries like China, India, Japan, and South Korea have no easy backup sources.
Not everyone loses, though. Russia — which has its own pipelines untouched by the conflict — is watching its energy revenue surge. Europe, desperate for alternatives, bought a record volume of Russian LNG in early 2026, essentially funding Moscow while trying to replace Gulf supplies. War in the Middle East, windfall profits in the Arctic. Economics is rarely clean.
The deeper lesson here isn’t really about oil prices or shipping lanes. It’s about fragility. Global supply chains spent decades optimising for efficiency — making things cheaper, faster, more interconnected — under the assumption that disruptions would be temporary and manageable. What 2026 exposed is that routing 20% of the world’s energy through two 3-kilometre shipping lanes isn’t efficiency. It’s a single point of failure dressed up as a supply chain. One conflict in one narrow corridor, and the price of cooking fuel spikes in India, restaurants in Tokyo run short on gas, and European governments quietly restart the Russian energy relationship they swore they’d ended.
The world built its economy on the assumption that the Strait of Hormuz would always be open. That assumption is now gone. And rebuilding confidence — in the markets, in the ships, in the lanes themselves — will take far longer than any ceasefire.
