World Bank: Hormuz war is biggest oil supply shock on record, Brent risk runs to $115 a barrel

The World Bank has classified the conflict-driven shutdown of the Strait of Hormuz as the largest oil supply shock on record and warned that the global market is now moving from a pure supply crisis into a second-stage demand-destruction phase. In its April 28, 2026 flagship Commodity Markets Outlook and a follow-on data blog published on May 7, the Bank documented that global oil supply crashed by 10.1 million barrels per day in March 2026, that Brent crude rose 65 percent (about $46 a barrel) in a single month—its largest monthly jump ever—and that global oil consumption is now contracting in advanced economies, Asia and the Middle East.

"Oil demand destruction is emerging," the World Bank wrote on May 7, using the technical term for the point at which prices rise high enough to permanently kill end-use demand rather than simply ration it. World Bank Chief Economist Indermit Gill framed the cumulative damage at the April 28 launch: "The war is hitting the global economy in cumulative waves: first through higher energy prices, then higher food prices, and finally, higher inflation, which will push up interest rates and make debt even more expensive." "War," he added, "is development in reverse."

The supply shock: 10.1 million barrels a day, gone

Before the war, the Strait of Hormuz moved roughly 35% of all seaborne crude oil, 20% of refined petroleum products, and around 20% of liquefied natural gas (LNG) shipments. After the conflict closed the strait to almost all civilian shipping, the World Bank measured a 10.1 mb/d drop in global oil supply in March 2026. For the full second quarter of 2026, the Bank now forecasts global oil output to fall 6.9 mb/d (6.6 percent) year-on-year, the steepest quarterly decline since the COVID-19 pandemic of 2020.

The Bank's accounting is precise about who can and cannot offset the loss. Production cuts are concentrated among Hormuz-routed producers—Iran, Iraq, Saudi Arabia (eastern fields), the United Arab Emirates, Kuwait, Bahrain and Qatar. Outside that geography, production growth is sharply limited. "The United States is projected to account for most non-OPEC+ supply growth, with output increasing by about 0.5 mb/d, partly offsetting disruptions in the region," the Bank wrote. A 500,000-barrels-per-day US increment against a 10-million-barrel hit is the asymmetry that gives this shock its scale.

The price spike: largest monthly Brent move on record

By the end of March 2026, Brent crude had risen by approximately 65 percent—about $46 a barrel—the largest monthly increase ever recorded for the global benchmark. Prices eased somewhat in early April on the announcement of a temporary ceasefire; by mid-April, Brent was still more than 50% above its level at the start of the year. The Bank's baseline forecast now sees Brent averaging $86/bbl in 2026, up from $69/bbl in 2025, before easing to $70/bbl in 2027 as supply stabilises.

The baseline embeds two key assumptions. First, that the most acute phase of disruption ends in May 2026. Second, that Hormuz-routed oil exports recover to roughly pre-war levels by the fourth quarter of 2026. If either assumption fails—through renewed hostilities, more extensive damage to regional production and export infrastructure, slow restart of shut-in wells, or persistent dislocation of tanker fleets—the Bank's upside-risk scenarios put 2026 average Brent at $95-$115 a barrel, 10 to 35 percent above the baseline. Most of the volatility skew, in the Bank's reading, is upward.

Demand destruction: the second stage of the shock

The new element in the May 7 blog is the formal warning that the demand side has now begun to break. Global oil consumption fell by 0.8 mb/d year-on-year in March 2026, and the Bank forecasts a further 1.5 mb/d decline in Q2 2026. The mechanism is mixed and partly behavioural: trade disruptions are physically reducing freight, price hikes are killing discretionary travel and freight margins, and policy responses—such as India's fuel-conservation appeal from Prime Minister Narendra Modi on May 10, and parallel restraint campaigns in Italy, Spain and Germany—are amplifying the contraction.

The geography of demand growth, the Bank notes, is narrowing fast. "Demand growth in 2026 is expected to remain concentrated in major emerging markets, particularly Brazil, India, and Indonesia, supported mainly by transport fuels and petrochemicals." Translation: OECD demand is contracting, much of emerging Asia ex-India is flat to negative, the Middle East itself is consuming less because regional economies are war-stressed, and only a small handful of Global-South economies are still adding incremental barrels. That asymmetry is what classical oil-market analysts describe as a "narrow demand base", the configuration that has historically preceded multi-year price corrections after the initial supply shock resolves.

The Q2 deficit and what is closing it

Even with demand destruction, the Bank projects the global oil market will run a 3.7 mb/d deficit in Q2 2026. The gap is being plugged from three sources. First, the United States' incremental 0.5 mb/d of new production. Second, strategic petroleum reserve releases from the US SPR, the EU's coordinated releases through the International Energy Agency (IEA), and parallel emergency drawdowns by Japan, South Korea and India. Third, modest output increases from non-Hormuz producers including Brazil, Guyana, Norway, Canada and parts of Africa.

Inventories have already begun to give. "Emergency reserves and limited output increases have partly alleviated shortages, but global inventories dropped sharply in March," the Bank wrote. The asymmetric risk is straightforward: strategic reserves are finite, shale response lags by months, shipping reroutes raise per-barrel logistics costs, and any escalation that knocks out more Middle East production capacity moves the market deeper into deficit without a buffer to lean on.

The volatility-spillover finding

The Commodity Markets Outlook's special focus chapter quantifies something oil analysts have long argued anecdotally: geopolitical supply shocks behave differently from other supply shocks, and the spillover is bigger than the textbook elasticities suggest. The Bank's findings: oil-price volatility during periods of elevated geopolitical risk is roughly twice as high as during calmer periods. A geopolitically driven 1% decline in oil production pushes prices up by an average of 11.5%, materially above the standard elasticity. Spillovers into other commodity markets are roughly 50% larger than under normal conditions.

The mechanics: a 10% oil price increase triggered by a geopolitical supply shock causes natural gas prices to peak about 7% higher and fertilizer prices to peak more than 5% higher, with the peak typically occurring about a year after the initial oil shock. For developing economies importing both energy and food inputs, that delay matters: the fertiliser channel means the food-affordability shock arrives in 2027, not 2026, just as the debt-service channel identified by Gill is also peaking.

Fertiliser, food and the WFP warning

Fertiliser prices are forecast to rise 31% in 2026, with urea—the dominant nitrogen fertiliser, made from natural gas—jumping a projected 60%. Fertiliser affordability will fall to its worst level since 2022. The United Nations World Food Programme (WFP) has warned that the combined effects of higher food and fuel prices could push up to 45 million additional people into acute food insecurity in 2026 if the conflict is prolonged. The poorest five deciles of the global population, who spend the largest share of household income on food and fuel, are the most directly exposed.

Base metals—aluminium, copper, tin—are also expected to reach all-time highs in 2026, reflecting strong industrial demand from data centres, electric-vehicle production and renewable-energy build-outs. Precious metals are projected to rise 42% on average, with gold and silver moving on safe-haven flows and central-bank reserve diversification. Those prices feed back into industrial cost structures and inflation expectations.

Macro damage: inflation up, growth down

The Bank revised developing-economy 2026 inflation to 5.1% under the baseline—a full percentage point above the 4.1% January projection, and above the 4.7% registered in 2025. Under the upside-risk scenario for oil, the inflation print rises to 5.8%, a level exceeded only in 2022 over the past decade. Higher commodity prices, the Bank notes, "will dampen growth worldwide."

Growth in developing economies is now forecast at 3.6% in 2026, a 0.4 percentage-point downward revision from January. Commodity-exporting developing economies are expected to grow just 2.4%, reflecting direct exposure to the Middle East shock and weaker demand for non-oil exports. 70% of commodity importers and more than 60% of commodity exporters are now projected to grow more slowly than the Bank expected as recently as January. Ayhan Kose, the Bank's Deputy Chief Economist and Director of the Prospects Group, warned governments away from broad fiscal support: "Governments must resist the temptation of broad, untargeted fiscal support measures that could distort markets and erode fiscal buffers. Instead, they should focus on rapid, temporary support targeted to the most vulnerable households."

What this means for India, Italy, Spain, Japan

The Bank does not name countries individually beyond the macro categories, but the implication for major importers is direct. India, which sources roughly 85% of its crude from imports and has its Indian crude basket trading above $113/bbl as of early May, is running a multi-billion-dollar monthly under-recovery at state oil-marketing companies, a fiscal channel that PM Modi's May 10 conservation appeal explicitly acknowledged. Italy, Spain, Germany and Japan face similar dependency mathematics, all flagged in the Bank's broader analysis of developing-economy exposure.

For the United States, the calculus is structurally different. The US is still a net oil exporter, and its 0.5 mb/d of incremental shale production is the largest non-OPEC+ supply response globally. But US consumers are still paying world prices at the pump, and that price channel is exactly what is driving voter pressure on the Trump administration to either secure a Hormuz reopening through diplomacy or escalate militarily. Both are politically expensive paths.

What to watch next

Three signals will tell readers whether the World Bank's baseline holds or its upside-risk scenarios materialise. First, whether Iran-US ceasefire negotiations—routed through Pakistan and the Qatar-Egypt-Turkey-Saudi Arabia mediator pool—reach a written memorandum before May ends. The Bank's baseline assumes the "most acute disruptions" end in May 2026; a May without a ceasefire pushes the calendar into June and skews scenarios upward.

Second, whether Hormuz tanker traffic returns to pre-war daily counts (roughly 20-25 large crude tankers and 5-7 LNG carriers per day in 2025) over the back half of 2026. Third, whether OECD demand continues to fall in the post-March quarterly data. If April and May consumption prints in the US, the EU, Japan and South Korea show further demand destruction, the Bank's $86/bbl baseline tilts toward the $70/bbl 2027 trajectory faster than its current calendar suggests—but at the cost of measurable GDP destruction in those economies.

Bottom line

The April 28 Commodity Markets Outlook reframed the Middle East oil shock from a price spike into a structural supply-and-demand realignment. The largest monthly Brent move in history, the largest supply shock on record, and the emergence of formal global demand destruction are now in the World Bank's official baseline, not in tail-risk speculation. Gill's framing—"war is development in reverse"—captures the cumulative damage: higher energy prices, then higher food prices, then higher inflation, then higher debt-service costs, with the heaviest weight falling on the poorest decile of the world's population. The next data print that matters is the May 2026 Hormuz tanker traffic count.