The Iran–Israel–U.S. conflict that escalated on February 28, 2026 has become a vivid demonstration of the economics of modern war. Its importance lies not only in the military confrontation itself, but in where the confrontation is occurring and how it interacts with the architecture of the world economy- economics of war. Wars in the industrial age disrupted factories, farms, and labor. Wars in the hyperconnected age also disrupt shipping insurance, pipeline utilization, air corridors, refinery margins, fertilizer trade, foreign-exchange markets, and central-bank expectations. The current conflict has touched one of the most sensitive nodes in the global system: the Strait of Hormuz, the waterway through which a substantial share of the world’s oil, petroleum products, and liquefied natural gas normally passes. Once that artery came under severe stress, the war stopped being merely a regional security crisis and became an international macroeconomic event [1][2][3].

The first lesson of war economics is that conflict is a reallocation mechanism. Governments redirect public money, industrial output, logistics capacity, and political attention from civilian uses toward military purposes. This is sometimes described through the language of “military Keynesianism,” because war spending can boost demand in the short run. Arms orders rise, fuel purchases rise, freight and defense contracting rise, and employment can be supported in selected sectors. But such stimulus is often inferior to productive civilian investment. Long-run growth research has frequently found the relationship between military spending and growth to be non-significant or negative unless specific threat conditions justify it [17]. In practical terms, war may make some sectors busier while making the overall economy less efficient, more indebted, and more inflation-prone.

Why Hormuz turns regional war into a global macro shock

The second lesson is that the global economic cost of war depends heavily on which assets and routes are threatened. A localized land war can devastate one economy while leaving the rest of the world relatively buffered. A conflict that touches a critical chokepoint is different. According to the U.S. Energy Information Administration, oil flow through the Strait of Hormuz averaged about 20 million barrels per day in 2024, equivalent to around 20% of global petroleum liquids consumption and more than one-quarter of world seaborne oil trade. Around one-fifth of global LNG trade also transited Hormuz in 2024 [4]. The EIA estimates that 84% of the crude oil and condensate and 83% of the LNG moving through the strait went to Asian markets, with China, India, Japan, and South Korea together accounting for 69% of Hormuz crude and condensate flows [4]. Those figures explain why a conflict centered in the Gulf rapidly becomes an energy-security emergency for Asia and an inflation shock for the wider world.

The March 2026 Oil Market Report from the IEA shows how quickly the crisis moved from risk to real disruption. The agency described the war as creating the largest supply disruption in the history of the global oil market. Its assessment noted that crude and oil-product flows through the Strait of Hormuz had plunged from around 20 million barrels per day before the war to only a trickle, while Gulf countries had cut total oil production by at least 10 million barrels per day. The IEA also projected an 8 million barrel-per-day plunge in global oil supply in March, even after partial offsets from non-OPEC+ producers [3]. In response, IEA member countries agreed on March 11 to release 400 million barrels from emergency reserves, the largest coordinated release in the agency’s history [3]. Yet even that extraordinary move did not fully calm markets, because traders understood that stock releases can cushion a temporary outage but cannot fully neutralize a live chokepoint conflict.

That market skepticism is visible in prices. Reuters reported that on March 13 Brent crude settled at $103.14 per barrel and WTI at $98.71, with Brent closing above $100 for the first time since August 2022 [1]. Barclays raised its 2026 Brent forecast to $85 a barrel, assuming the strait normalizes within two to three weeks, but also warned that if disruptions last four to six weeks Brent could average $100 for the year [2]. Such forecasts matter because they shape corporate budgeting, shipping contracts, monetary-policy expectations, and consumer sentiment. Oil markets do not wait for a complete physical shortage before repricing. They respond to probabilities—how long the route stays constrained, how quickly storage fills, whether insurance remains available, and whether bypass pipelines can absorb more flow.

Table 1. Why the Strait of Hormuz matters

Table 2. Immediate market shock in March 2026

Inflation, central banks, and stagflation risk

Here the structural limits are crucial. The EIA notes that Saudi Arabia and the UAE do have pipeline infrastructure that can bypass Hormuz, but the spare capacity is limited. EIA estimates suggest that only about 2.6 million barrels per day of capacity from Saudi and UAE pipelines was available to bypass the strait in the event of a disruption, far below normal Hormuz flows [4]. The IEA provides a somewhat broader view of alternative routing, but its March report is unequivocal that storage, export bottlenecks, and refining outages are constraining the system [3]. This means that in the current war, the binding constraint is not simply oil in the ground. It is the commercial and physical ability to move that oil safely to buyers. That is a defining feature of twenty-first-century war economics: disruption now works through logistics and insurability as much as through direct destruction.

The macroeconomic transmission from oil to inflation is both fast and politically powerful. IMF Managing Director Kristalina Georgieva said on March 9 that every 10% increase in oil prices, if it persists through most of the year, would add around 40 basis points to global headline inflation and shave 0.1% to 0.2% off global output [5]. That estimate is especially important because the world economy entered this shock with little margin for error. Many advanced economies were still trying to secure a durable return to low inflation. Public debt ratios remained high after the pandemic and the energy-price spikes that followed Russia’s invasion of Ukraine. Several emerging markets were managing delicate combinations of high import bills, currency sensitivity, and social pressure around food and fuel prices. In such a setting, an oil shock is not merely a commodity story; it becomes a central-bank story, a bond-market story, and often an electoral story.

History helps explain why this pattern is so persistent. During the 1973–74 oil shock, Arab oil producers imposed an embargo and production cuts after the Yom Kippur War, and oil prices surged, helping push the United States and other economies into stagflation [16]. During the 1978–79 Iranian oil shock, lost Iranian output again tightened the market and fed a broader inflation spiral. Those episodes did not just raise energy bills; they forced policymakers to choose between containing inflation and cushioning growth. The same dilemma is emerging now. When war raises energy prices and weakens activity at the same time, it revives stagflation risk. Central banks cannot respond cleanly, because tightening policy may anchor inflation but worsen the slowdown, while easing policy may soften the slowdown but embed higher inflation expectations.

Regional exposure and unequal damage

The current conflict is already altering financial conditions. Reuters reported that on March 13 the Dow fell 0.25%, the S&P 500 fell 0.6%, and the Nasdaq dropped 0.9%, while the dollar strengthened as investors treated it as the preferred safe haven [1]. Markets also rapidly reduced bets on Federal Reserve rate cuts for the year [1]. This matters because financial markets are forward-looking transmission channels. A war in the Gulf affects valuation multiples, discount rates, earnings assumptions, and credit spreads long before all the physical shortages have materialized. Energy-intensive sectors are punished quickly. Exporters of oil and gas may benefit in relative terms. Importers with weak currencies suffer twice: once through higher dollar-denominated fuel costs and again through domestic depreciation pressure.

India is one of the clearest examples of a vulnerable importer. Reuters reported on March 12 that India imports nearly 90% of its crude requirements and about 50% of its gas needs, that over half of its crude comes from the Middle East, and that current oil stocks are sufficient for only 20 to 25 days [6]. If oil averages $100 per barrel for close to a year, ICRA estimates the current account deficit could widen to 1.9%–2.2% of GDP, from a projected 0.7%–0.8%, while Elara Securities estimated that federal expenditure could rise by 3.6 trillion rupees in the next financial year [6]. Fertilizer subsidies alone could rise by 200 billion rupees under that price assumption [6]. For India, then, the war is not an abstract geopolitical event; it is a balance-of-payments risk, a fiscal risk, and an inflation-management challenge.

Europe is exposed in a different way. Its direct oil dependence on the Gulf is less central than Asia’s, but gas vulnerability remains significant, especially after the post-2022 reshaping of Europe’s energy system. Reuters reported that European gas storage could end March at only around 22%–27% full, compared with a five-year average near 41%, and that benchmark Dutch gas prices are about 50% above their pre-war level [12][13]. With Qatar’s LNG flows disrupted and European storage already low for the season, the war threatens to turn an oil shock into a gas-restocking problem ahead of winter. That dynamic matters because gas costs feed directly into power markets, industrial margins, fertilizer production, and household energy bills. Europe’s challenge is therefore not merely fuel affordability today but storage adequacy for the next heating season.

Table 3. Regional exposure snapshot

Supply-chain shocks beyond oil

Japan and South Korea also illuminate the geography of exposure. Reuters reported that Japan depends on the Middle East for about 95% of its crude imports and 11% of its LNG, with around 6% of its LNG moving through Hormuz [11]. Japan has asked Australia to increase LNG output to stabilize supplies [11]. South Korea faces a dual risk: higher energy costs and vulnerability in strategic industrial inputs. Policymakers there have considered energy vouchers and a greater use of coal and nuclear power to contain the crisis [12]. For both countries, this is a reminder that energy dependence is not only about price volatility; it is also about the strategic fragility of being downstream from a single unstable corridor.

One of the most striking features of the current conflict is how quickly the shock has moved beyond oil. Reuters reported that air freight rates rose by as much as 70% on some routes as the war blocked trade lanes, limited usable airspace, and pushed shippers from sea to air despite the much higher cost [7]. South Asia–Europe rates rose to $4.37 per kilogram from $2.57, South Asia–North America rates rose 58% to $6.41, and Europe–Middle East rates rose 55% to $2.79 [7]. Air freight handles roughly one-third of global trade by value, so these moves matter for pharmaceuticals, perishables, electronics, and any time-sensitive cargo. War therefore acts as a tax on time. It lengthens routes, shrinks available capacity, raises insurance costs, and forces firms to pay more for certainty—or to accept more risk in their inventories.

Jet fuel is another crucial spillover. Reuters reported that jet fuel prices in Asia had surged 140% since February 27, reaching record levels around $225.44 per barrel, while some jet fuel prices more broadly had doubled since the start of the conflict [15]. This has major implications for airlines, freight operators, tourism, and consumer budgets. Unlike crude, jet fuel markets can tighten very quickly because storage is limited and refinery yields matter. If medium-sour crude becomes scarce or exports from suitable refiners are disrupted, jet fuel margins can explode even faster than oil itself. That means the war pressures an economy not only through the cost of energy but through the cost of movement. Mobility becomes more expensive for households, businesses, and cargo networks simultaneously.

Table 4. Supply-chain spillovers beyond crude oil

The fiscal toll on the belligerents

The same logic applies to smaller but strategically vital commodities. Reuters reported that helium spot prices doubled after disruptions to Qatar’s natural-gas processing, because helium is a byproduct of gas extraction and Qatar accounts for nearly one-third of global output [8]. The article noted that around 5.2 million cubic meters of helium were being lost from the market each month [8]. This matters because helium is essential for semiconductors, medical imaging, and aerospace. Shortages therefore threaten industries that appear, at first glance, unrelated to Middle Eastern war. This creates particular pressure for semiconductor-heavy economies that depend on steady access to high-purity industrial gases. This is one of the clearest demonstrations of how modern war economics works: the decisive bottlenecks are sometimes not the largest commodities but the smallest irreplaceable ones.

Agriculture is also directly in the line of fire. Reuters reported that the Strait of Hormuz is the conduit for about one-third of global fertilizer trade and 20% of the world’s export fuels [9]. The closure of the strait and attacks on regional facilities shut fertilizer plants and disrupted shipping routes just as Northern Hemisphere planting season was beginning [9]. Qatar Energy stopped production at the world’s largest single-site urea plant after gas supply was lost, and India—where more than 40% of urea and phosphatic fertilizer imports come from the Middle East—has already seen three plants reduce urea output because LNG supplies from Qatar dropped sharply [9]. The chain is simple but powerful: war raises fuel and fertilizer costs, fertilizer shortages cut farm margins and potentially yields, and food inflation then arrives with a lag. Poorer countries face the harshest version of that sequence because they have the least room to subsidize both farmers and consumers.

Table 5. Estimated direct economic toll on the belligerents

Table 6. Policy response menu and its limits

Policy responses, limits, and long-term lessons

While the rest of the world bears indirect costs, the belligerents themselves face direct fiscal and output losses. Reuters reported that Israel’s Finance Ministry estimated damage to the Israeli economy could exceed 9 billion shekels, or about $2.93 billion, per week under the strictest wartime restrictions [10]. Schools have closed, reserve mobilization has expanded, and normal economic activity has been constrained [10]. At the same time, Reuters has reported that the first six days of the war cost the United States about $11.3 billion, including $5.6 billion in munitions during the first two days [18]. Iran’s fiscal hit is harder to quantify in real time, but the vulnerability of its export system is obvious. Reuters reported on March 14 that Kharg Island, which was struck by U.S. forces, handles roughly 90% of Iran’s crude exports—about 1.55 million barrels per day out of 1.7 million exported in 2026 [14]. When a country’s principal export artery is directly threatened, the economic damage can compound rapidly through lost revenue, currency pressure, insurance costs, and capital flight.

There are, of course, relative winners in a war-driven energy shock. Some oil exporters benefit from higher prices if they can maintain supply and reroute exports. Energy companies with non-Gulf production gain pricing power. Alternative suppliers of LNG, fertilizer, and helium may enjoy windfall margins. Australia’s bargaining position in LNG markets improves when Japan urgently seeks more cargoes [11]. North American helium producers and diversified industrial gas firms can benefit when Qatari supply is constrained [8]. But such gains should not be confused with a net global benefit. War-driven windfalls are redistributive, not genuinely productive. They move income from consumers to producers and from importers to exporters while increasing uncertainty, inflation, and deadweight loss.

This distinction matters because it helps explain why war seldom creates durable prosperity even when it boosts selected sectors. The NBER literature on military expenditure and growth emphasizes that any short-run demand support must be weighed against weaker long-run allocation, higher debt burdens, and opportunity costs in infrastructure, health, education, and technology [17]. In a narrow accounting sense, a war economy can look active. In a broader welfare sense, it is often consuming future capacity to pay for present insecurity.

Policy responses can mitigate the blow but rarely erase it. The IEA’s 400 million-barrel stock release is an example of an effective buffer with clear limits [3]. It can reduce panic, supply emergency barrels, and buy time for rerouting and diplomacy. It cannot reopen a blocked strait or restore insurance markets by itself. Governments are also deploying domestic measures: South Korea is considering energy vouchers and more coal and nuclear power; China plans to release fertilizer from national reserves; India is trying to ease pressure on LPG markets; Japan is seeking more LNG from Australia [11][12]. These measures are rational, but they are defensive. They reflect a world economy still heavily exposed to a handful of chokepoints and concentrated supply chains.

The longer-term lesson is therefore structural. The conflict shows that resilience cannot be measured only by reserves or alternative suppliers on paper. True resilience requires diversified routes, flexible fuel mixes, larger strategic stocks, more robust fertilizer and industrial-gas systems, and a fiscal capacity strong enough to cushion households without destabilizing the sovereign balance sheet. It also requires recognizing that energy security, food security, and industrial policy are no longer separable categories. In the current war, oil, LNG, air freight, helium, and fertilizer are parts of the same system. When one central artery fails, the whole network reprices.

Even after fighting eventually subsides, the economic afterlife of war remains. The World Bank, United Nations, European Commission, and the Government of Ukraine estimated in February 2025 that recovery and reconstruction needs in Ukraine had reached $524 billion, roughly 2.8 times the country’s 2024 GDP [19]. That figure is not a direct analogy to the current conflict, but it illustrates a broader truth: war’s fiscal legacy outlasts the battlefield phase. Reconstruction, debt service, investor caution, and strategic realignment persist for years. Supply chains that once looked efficient may be redesigned around redundancy and geopolitics. Governments may tolerate higher energy costs in exchange for lower strategic dependence. Firms may hold larger inventories and accept lower efficiency to gain more security.

The economics of the Iran–Israel–U.S. conflict, then, is not only the economics of bombs and budgets. It is the economics of interruption. A war that threatens a chokepoint does not need to destroy the world’s productive assets to damage the world economy. It only needs to disrupt the flows—of crude, LNG, fertilizer, jet fuel, helium, cargo, credit, and expectations—that allow a globalized system to function smoothly. That is why this conflict matters far beyond the Middle East. It has revealed that the modern world is still deeply vulnerable to the weaponization of interdependence. The countries and firms that adapt fastest will be those that treat resilience not as a cost to be minimized, but as an asset to be built before the next chokepoint crisis arrives.