The Hormuz crisis: Asia's bill for an energy shock, at the hour of the truce

The Strait of Hormuz, barely 33 kilometres wide at its narrowest point, concentrates more than 80% of the crude and liquefied natural gas bound for Asia. Blocked from early March to mid-June 2026, it turned a regional war into a continental shock. The 17 June memorandum of understanding begins a reopening, immediately weakened by a new Iranian closure announcement on 20 June. This article draws up the cumulative assessment, sector by sector, on verified institutional sources, without extrapolating beyond the available figures.

The sequence is now documented. The war launched on 28 February 2026 led Iran to close the strait in early March, followed by a US blockade of Iranian ports from April to late May. The conflict was suspended by a memorandum of understanding signed on 17 June at the Palace of Versailles, which implies a reopening of the strait and the lifting of the blockade. Commercial traffic recovered on 18 and 19 June, before Tehran announced a new closure on 20 June, disputed by Washington. The truce is therefore real but precarious, and the bill analysed below is largely cumulative: it does not vanish with the signing.

An already colossal macroeconomic bill

According to a Reuters tally, companies listed in the United States, Europe and Asia recorded at least $25bn in costs directly linked to the conflict, an amount presented as a starting point. At least 279 international companies took defensive measures: price hikes, production cuts, suspension of dividends or buybacks, short-time working, fuel surcharges or requests for emergency aid.

The institutional revisions converge. The Asian Development Bank (ADB), in a special update of 29 April 2026, lowered its growth forecast for Asia-Pacific to 4.7% in 2026 and 4.8% in 2027, against 5.1% in both cases previously, and raised regional 2026 inflation from 3.6% to 5.2%, on an assumption of oil around $96 a barrel, against $69 before the conflict. The IMF, in its April 2026 outlook, cut world growth to 3.1% in 2026, against 3.4% in 2025, and raised world inflation to 4.4%, on the assumption of a 19% rise in energy prices; the euro area drops to 1.1%. The World Bank, finally, projects a 24% rise in energy prices in 2026, the highest level since the invasion of Ukraine, and a 16% rise across all commodities. The United Nations Development Programme (UNDP) estimates that the escalation could cost the region between $97bn and $299bn in lost output and push 8.8 million more people into poverty.

Asian industry under the naphtha shock

Beyond crude, it is the Asian industrial apparatus that was disrupted. The most emblematic rupture concerns naphtha, an oil derivative present in a dizzying range of products, from plastic films to industrial inks and medical devices. Japan and South Korea depend heavily on naphtha imported from Qatar and Kuwait, whose exports were hindered by the blockage of the Strait of Hormuz.

The consequences were visible. In Japan, consumer-goods companies, for lack of stable supply, dropped the colours of their food packaging to save on ink. According to Oxford Economics, naphtha was one of the main channels through which Middle East supply shocks transmitted to the whole economy. Petrochemical plants across Asia cut their operating rates, threatening the chains of manufacturing, textiles, construction and packaging. The World Bank calls the episode the largest oil supply shock ever recorded, with an initial reduction on the order of 10 million barrels a day.

The spectre of inflation and the powerlessness of central banks

The surge in energy prices placed Asian central banks before a formidable dilemma. Brent exceeded $100 a barrel at the peak of the crisis, up some 65% in the single month of March according to the World Bank, before easing; the institution pencils in an average of $86 in 2026, against $69 in 2025. Nearly 80% of the blocked crude and LNG was bound for Asia, making the region exceptionally vulnerable.

Central banks had to navigate between the sudden inflationary shock and structural headwinds: slowing growth, pressure on currencies. According to S&P Global Ratings, the room to ease monetary policy narrowed, which forced Asia-Pacific central banks into caution. Several importing economies saw their gasoline prices rise sharply, while Thailand and Indonesia contained the increases through subsidies and price controls, at a growing budgetary cost.

Agriculture and food security on the front line

The shock goes beyond energy. The World Bank projects a 31% rise in fertiliser prices in 2026, driven by a 60% jump in the price of urea, because about half of world urea and nearly a third of ammonia transit the strait. The surge threatens food security and the livelihoods of hundreds of millions of smallholder farmers in South Asia. A prolonged disruption would weigh not only on immediate food prices, but also on subsequent harvests, as food crops are traded off in favour of more profitable production. The World Bank sums up the dynamic in cumulative waves: energy prices first, food prices next, inflation and interest rates finally, which weigh on the debt service of the most fragile countries.

India: growth maintained, fragilities exposed

India illustrates the paradoxical situation of many Asian economies. On one side, it remains the fastest-growing large economy, around 6.3% to 6.5% in 2026 according to the institutions. On the other, its dependence on energy imports through the strait is considerable: about 55% of its crude imports and 90% of its LPG imports transit Hormuz.

According to Moody’s Analytics, Asia-Pacific economies entered 2026 on fragile foundations, weak domestic demand and slowing exports. The conflict adds “a new difficulty in the wheel of growth of the large economies like China, India, Japan and South Korea”, with a “disturbing echo” of the inflation and supply shocks that followed the pandemic and the invasion of Ukraine.

The substitution routes: a costly illusion

Alternative routes exist, but remain limited and costly. Saudi Arabia increased the capacity of its East-West pipeline (Petroline) toward the Red Sea; the United Arab Emirates extended its pipeline to Fujairah. The EIA estimates that these routes could collectively carry on the order of 3.5 million barrels a day, about 20% of the strait’s normal traffic. For industry, the detours via the Cape of Good Hope lengthen journeys by several weeks and push up freight costs. The price of a container between Asia and Europe jumped 20% in a few days, and Maersk warned that the extra costs would feed through to entire supply chains.

The governments’ response: subsidies and rationing

Faced with the shock, Asian governments mixed price mitigation and incentives for restraint. In India, cuts to the fuel excise tax and a squeeze on the margins of state oil companies limited the transmission to retail prices, while LPG rationing prioritised households. In Japan, abundant strategic reserves, on the order of 228 days at the start of April 2026 including public and commercial reserves, allowed, together with price caps, the increases at the pump to be limited. South Korea also drew on its reserves. These measures carry a budgetary cost and create distortions, which pushes the ADB to recommend targeted, temporary support rather than general subsidies.

A structural recomposition under way

The crisis could accelerate transformations already begun. For manufacturing-intensive economies, the conflict could hasten a strategic recalibration long under way. Some governments, including South Korea, have begun to explore alternative energy sources in response to the disruptions coming from the Gulf. Asia’s dependence on the strait is a brutal reminder that the energy transition, however fast, does not happen in a few weeks: one lives for a long time in two systems at once, building the next while paying the price of the previous one.

Asia at the hour of the truce

The shockwave will remain tangible even after the signing: fuel shortages, petrochemical chains under strain, heavier food baskets. The World Bank and the IMF say it plainly, most of the damage is already absorbed and will take months to dissipate, assuming the truce holds. And Iranian leverage over the strait remains intact, as the 20 June closure announcement recalled. For Asia, more than 80% dependent on this corridor for its energy, the lesson is less an immediate threat than a structural vulnerability now quantified, and impossible to ignore.

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Primary sources: Asian Development Bank, special forecast update (29 April 2026) and Asian Development Outlook (April 2026); IMF, World Economic Outlook: Global Economy in the Shadow of War (April 2026); World Bank, Commodity Markets Outlook (28 April 2026); UNDP, crisis cost estimates; Reuters, tally of costs for listed companies; S&P Global Ratings, Economic Outlook Asia-Pacific Q2 2026; Moody’s Analytics, Asia-Pacific Outlook; Oxford Economics; U.S. Energy Information Administration, World Oil Transit Chokepoints; House of Commons Library, Israel/US-Iran conflict 2026: Reopening the Strait of Hormuz (June 2026); PBS NewsHour and RFE/RL for the chronology of the 17 June memorandum and the reopening (June 2026). The growth, inflation and price figures come from these sources and have not been recalculated; the lost-output and poverty estimates are ranges, sensitive to the duration of the blockade and the holding of the truce.