In the hundred-plus days since Israel and Iran began trading missiles, Brent crude has climbed 31%. This week the two countries declared a halt to attacks, yet markets refuse to relax. The reason sits at a single point on the map: Hormuz, the waterway that carries 20% of the world's oil and 20% of its LNG. Here is the hottest issue in the world right now, taken apart with data.
The sequence from last weekend into early this week was a rollercoaster. Israel struck Hezbollah in Lebanon, and soon after, explosions were reported in Tehran, Tabriz, and Isfahan. On Monday (June 8), Brent settled 3.4% higher at $96.24 a barrel, and WTI rose 3.2% to close at $93.41. A day later, at the urging of U.S. President Trump, Iran and Israel announced a mutual halt to attacks. Oil did not fall. The market chose watchfulness over relief, and on the 9th prices actually edged slightly higher.
This conflict did not begin overnight. It has run for more than 100 days since escalating in late February with U.S. and Israeli airstrikes. Over that span, Brent has gained roughly 31% from its pre-conflict level, and WTI roughly 37%. The same week in Washington, the U.S. House passed a resolution demanding an end to the war with Iran, exposing a rift between the administration and Congress. A ceasefire declaration, a congressional brake, and oil prices that will not come down. To understand why all three landed in the same week, you have to look at one waterway on the map, 33km across.
The Strait of Hormuz is the only sea route linking the Persian Gulf to the Indian Ocean. At its narrowest point it is about 33km wide, and the actual shipping lanes run barely 3km in each direction. The U.S. Energy Information Administration (EIA) calls it "the world's most important oil transit chokepoint." The numbers show that is no exaggeration.
| Indicator | Scale | What it means |
|---|---|---|
| Oil flow (2024 avg.) | 20 million b/d | ~20% of world oil consumption |
| Share of seaborne crude trade | 25%+ | A quarter of all crude moved by sea |
| Largest user: Saudi Arabia | 5.5 million b/d | 38% of Hormuz crude flow |
| LNG flow (H1 2025) | 11.4 Bcf/d | Over 20% of world LNG trade |
| Qatar's LNG reliance on Hormuz | 93% | UAE: 96%, effectively all of it |
| Alternative routes | Almost none | Bypass pipelines absorb only a fraction |
Sources: U.S. Energy Information Administration (EIA) and International Energy Agency (IEA) analyses of Hormuz. Saudi Arabia's East-West pipeline and the UAE's Fujairah line offer some bypass capacity, but the EIA states plainly that "there would be very few alternatives for moving oil out if the strait were closed." The crisis has run long enough that the EIA launched a dedicated chokepoint dataset in May.
And it is not only oil. The Qatari LNG that Korea, Japan, and China depend on passes through this strait virtually in its entirety. Natural gas has even fewer alternative routes than crude. Seaborne LNG has no pipeline fallback; if the ships cannot get through, that is the end of it. Hormuz is known as the oil strait, but it is the strait of electricity and heating too.
Concentrate the flow of world GDP into a single point and you get Hormuz. 33km wide, with 3km shipping lanes. The most efficient, and most fragile, design globalization ever produced. — The Economics of a Chokepoint
Here is a curious fact. Hormuz has never once been fully closed in its history. Oil kept flowing through the Iran-Iraq "Tanker War" of the 1980s, and through the tanker attacks of 2019. Yet oil prices have risen more than 30% in 100 days of conflict. That is because what the market prices in is not the event of a blockade but its probability.
This week was the textbook case. A halt to attacks was announced, and far from falling, oil edged slightly higher. Iran attached a condition, warning it would resume strikes if Israel kept hitting Hezbollah, and the market judged that conditional ceasefire unlikely to last. Indeed, the market's read is that transit volumes through the strait have remained constrained relative to peacetime ever since the escalation. Insurance premiums have climbed, shippers have opted for detours and waiting, and supply has already tightened without any physical blockade at all.
Split the price of oil into its components and it looks like this: on top of the base price set by supply and demand sits a risk premium created by war. No one can say precisely where fundamentals end and premium begins within the +31% of the past 100 days, but the very fact that prices refuse to unwind on ceasefire news is itself a signal that the premium remains thick.
① Inflation and interest rates. Oil is the fastest transmission channel for inflation. Riding freight costs and electricity bills, it reaches consumer prices within months. With central banks weighing the timing of rate-cut cycles, oil pinned in the $90s pushes those cuts further out. When U.S. tech stocks tumbled in early June and the 10-year Treasury yield jumped toward 4.5%, energy-driven inflation worries were part of what lay underneath.
② Shipping and insurance. When war-risk premiums rise, the cost of every cargo passing through Hormuz rises with them. Not just tankers; container ships too. As the 2024 Red Sea crisis showed, friction at a single chokepoint can shake global freight rates across the board.
③ Rotation in equities. Each phase of escalation has repeated the same rotation: energy and defense stocks up, tech and growth stocks down. The direct cause of the June 5 U.S. selloff (S&P -2.6%, Nasdaq -4.2%) was concern over AI valuations, but the oil prices pushing bond yields higher were one finger on that trigger. The VIX crossing 21 came the same week.
④ Korea: double exposure. Korea relies on the Middle East for about 70% of its crude imports, and most of that passes through Hormuz. The same goes for Qatari LNG. Then the exchange rate compounds it. Buying $90s crude with the won in the mid-₩1,550s means import costs in won terms are already inflated twice over. The trade balance, electricity rates, and consumer prices come under pressure in turn.
⑤ The AI era's new circuit: power costs. This channel is appearing for the first time in this cycle. AI data centers devour electricity, and in many countries the marginal price of power is set by natural gas. If the LNG passing through Hormuz amounts to 20% of world trade, then tension in the strait has become a variable in the cost of AI inference. For Korea, riding a semiconductor boom, it is two sides of the same coin.
The price board at a Seoul gas station 10,000km from Hormuz, an electricity bill in Tokyo, a data center power contract in Silicon Valley. The tension along a waterway 33km across gets billed, in installments, to every one of those numbers. If this week's ceasefire declaration holds, the risk premium will drain away slowly. If it breaks, the market will price in the next scene of a movie it has already watched, and faster this time.
One thing is certain. Over the past 100 days, the world economy was reminded of just how narrow the path beneath it really is. That is why words like energy diversification, strategic reserves, alternative routes, and the shift to nuclear and renewables have moved back to the front row of policy. The geopolitics of narrow passages is not over, and the bill does not check nationality.