Hormuz Was Shut For Four Months And Nothing Broke. The Buffer That Did That Is Spent.

The Strait of Hormuz, which normally carries roughly one-fifth of global oil and liquefied natural gas supplies, was almost entirely closed for nearly four months, from the closure Tehran ordered days after U.S. and Israeli attacks in late February until Washington and Tehran signed a memorandum of understanding in mid-June ^[1][9][10]. Oil prices stayed low, gas markets held up, and the recession that past energy shocks produced did not arrive ^[2]. That outcome is the thing most likely to be misread inside a planning cycle.

The head of the International Energy Agency called the closure the largest supply disruption in the history of the global oil market ^[11]. According to a Foreign Affairs assessment of the episode, the reason it did not read that way in the price screens is a specific and finite set of conditions: markets were oversupplied before the war began, inventories were relatively high, Saudi Arabia and the United Arab Emirates had already built pipelines around the strait, and governments and companies had amassed emergency and commercial stocks ^[3]. China supplied a fifth cushion, reducing imports and drawing on its capacity to vary how much oil it buys for stocks, holds, refines for export, and consumes at home ^[4].

None of those five is renewable on the timescale of the crisis. Inventories have been depleted, demand is recovering, alternative routes are becoming more vulnerable, and infrastructure continues to come under fire, with some repairs measured in years ^[5]. On the same account, a second phase of the Hormuz crisis could prove substantially more damaging than the first ^[13]. Roughly four of the five months under review were spent with the strait closed, so the low-price period is not a demonstration of tolerance to disruption but a record of what one full drawdown of the buffer buys ^[15].

The headline benchmark also concealed who paid. Countries in Asia and Europe endured high prices, shortages, rationing, fiscal strain and forced reductions in consumption, while the United States and China showed newfound insulation and influence ^[6]. If your exposure is a Brent number in a model, the first phase looked mild; if it was a diesel contract in Europe or a rationed grid in Asia, it did not. The refining crunch means diesel and other products are priced well above where current headline crude would normally put them ^[7], which is a cost that shows up in freight, logistics and any fuel-linked input long before it shows up in a crude chart.

Two things to watch. First, refined products: markets are already stressed by shortages of diesel and jet fuel, and renewed intense fighting that keeps the strait blocked could push crude sharply higher from there ^[12]. Second, European gas storage. The shock has made replenishment harder and more costly, leaving the continent with lower-than-usual storage and more exposed to energy and geopolitical coercion this coming winter ^[8]. Underneath both, the structural point: even with de-escalation, passage through the strait is likely to remain either controlled by Iran or open to Iranian disruption at any time, and a better scenario in the next several months looks improbable absent major change in Tehran ^[14]. Any plan whose disruption case is "it went fine last time" is budgeting against inventory that has already been consumed.