How the disruption of oil, liquefied natural gas, and urea exports will cascade through the world economy

The Persian Gulf is the most consequential body of water in the global economy. Its narrow exit — the Strait of Hormuz, just 33 kilometres wide at its narrowest point — acts as a valve through which flows an extraordinary share of the world’s energy and agricultural inputs. A sustained closure of that valve by Iran will trigger an economic shock with few historical precedents.

Let’s look at the three commodity categories most exposed to such a disruption: crude oil and refined petroleum products, liquefied natural gas (LNG), and urea, the nitrogen fertiliser upon which modern agriculture depends. Together, these three flows underpin not just energy markets but global food security, industrial production, and the fiscal stability of dozens of nations. The Strait of Hormuz: A Single Point of Failure

Roughly 20–21 million barrels of oil pass through the Strait of Hormuz every day, representing approximately 20% of global petroleum liquids consumption and around 30% of seaborne crude trade. The Gulf states bordering this corridor — Saudi Arabia, the United Arab Emirates, Kuwait, Iraq, Iran, and Qatar — collectively hold the majority of the world’s proven oil reserves and a dominant share of global LNG export capacity.

There is no adequate alternative. The East-West Pipeline across Saudi Arabia (Petroline) can carry around 5 million barrels per day, and the Habshan-Fujairah pipeline in the UAE adds limited bypass capacity. But these routes are insufficient to compensate for a full shutdown, and are themselves vulnerable to sabotage. For the first time in history the oil has stopped flowing. Oil: The Immediate Shock

The abrupt closure of Persian Gulf oil exports will constitute the largest supply shock in the history of petroleum markets — larger in absolute terms than the 1973 Arab oil embargo or the Iranian Revolution of 1979, both of which removed far smaller volumes, if Iran maintains the blockade for a month or longer. The International Energy Agency estimates that OECD strategic reserves could theoretically cushion a disruption for several months, but the psychological and speculative impact on oil prices would be immediate and severe.

Analysts and historical precedent suggest that oil prices could spike to anywhere between $150 and $250 per barrel — or potentially higher if markets judged the disruption likely to be prolonged. At such prices, the consequences would radiate rapidly through the global economy:

Fuel costs and consumer prices.

Petrol, diesel, aviation fuel, and heating oil prices have all surged. In major consuming economies — the United States, Europe, China, Japan, India — consumer price inflation will accelerate sharply with a prolonged disruption. Households will face dramatically higher energy bills and transport costs within weeks.

Industrial contraction.

Energy-intensive manufacturing sectors — petrochemicals, cement, steel, aluminium, glass — will face crippling input cost increases. Many would reduce output or shut down. Supply chains across the global economy would seize as freight costs soared.

Aviation and shipping.

Aviation fuel costs would make large swaths of commercial aviation economically unviable. Shipping freight rates, already elevated by fuel costs, would compound broader supply chain disruption.

Recession risk.

Every major oil price shock since the 1970s has been followed by a global economic recession. A shock of this magnitude would almost certainly do the same. The IMF and World Bank have historically estimated that a $10 per barrel sustained rise in oil prices reduces global GDP growth by around 0.2–0.5 percentage points; a shock ten or twenty times larger would be categorically different in nature.

Here are the most vulnerable countries to this shock:

Japan

Japan is the world’s most structurally vulnerable major economy to a Gulf oil shock. It imports approximately 90% of its crude oil from the Middle East, with Saudi Arabia, the UAE, Kuwait, and Qatar as its dominant suppliers. Japan has almost no domestic oil production, very limited alternative import infrastructure, and a dense industrial base dependent on petroleum. Its strategic reserves — among the largest in the world at around 150 days of consumption — provide a buffer, but not immunity. A prolonged closure lasting more than six months would force severe rationing, industrial curtailment, and recession. Japan’s post-Fukushima decision to phase down nuclear power has deepened its vulnerability by reducing the one energy source that could partly substitute.

South Korea

South Korea imports over 70% of its crude from the Middle East, with the Gulf states as its largest suppliers. Like Japan, it has negligible domestic production. Its economy is heavily industrial — semiconductors, shipbuilding, petrochemicals, and steel — all energy-intensive sectors that would face rapid input cost crises. South Korea maintains strategic reserves of approximately 100 days. Its proximity to Japan means both nations would compete for limited alternative supply from West Africa, North America, and Russia, driving prices higher still.

India

India is the world’s third-largest oil importer and sources roughly 60–65% of its crude from the Gulf region, primarily Iraq, Saudi Arabia, and the UAE. It has limited domestic production and strategic reserves of only around 10–15 days — among the smallest relative to import volume of any major economy. India’s fuel subsidy architecture means the government would face enormous fiscal pressure as global oil prices surged, at the same moment that import costs were consuming foreign exchange reserves. For India’s 1.4 billion population — many of whom have limited financial buffers — the pass-through of energy and food cost increases would be devastating. India’s industrial heartland, its agricultural sector (which depends heavily on diesel for irrigation pumps), and its nascent manufacturing base would all be severely disrupted.

Taiwan

Taiwan imports almost all of its energy requirements and sources a significant majority of its oil from the Gulf. As the world’s primary producer of advanced semiconductors, a disruption to Taiwan’s energy supply would carry consequences far beyond its own economy — threatening global technology supply chains. Taiwan’s strategic reserves are modest, and alternative supply routes would be expensive and slow to establish.

Pakistan and Bangladesh

Both nations are heavily dependent on Gulf oil imports and have almost no strategic reserves, limited foreign exchange, and large populations with high fuel and food price sensitivity. Pakistan in particular has endured recurring foreign exchange crises; a surge in import costs would likely trigger a balance-of-payments collapse. For Bangladesh, fuel price increases would threaten the cost competitiveness of its garment sector — the backbone of its export economy — as well as the diesel-powered irrigation that supports its rice production.

Sub-Saharan Africa (Particularly Kenya, Ethiopia, Tanzania)

Many sub-Saharan African nations depend on Gulf oil for a large majority of their refined product imports, with minimal domestic refining capacity and no strategic stockpiles. Countries like Kenya, Ethiopia, and Tanzania would face acute fuel shortages, with knock-on effects on transport, electricity generation, and agricultural supply chains. Governments with limited foreign reserves would be unable to sustain imports at elevated prices for any prolonged period.

LNG: The Gas Markets Upended

Qatar is by some measures the world’s largest single exporter of liquefied natural gas, accounting for roughly 20–22% of global LNG trade. Together with the UAE and other Gulf producers, the Persian Gulf region represents a pillar of the global gas supply architecture. The disruption of this supply arrives into a global gas market already structurally tighter following Russia’s invasion of Ukraine and the reconfiguration of European energy supply.

Japan (Again the Most Exposed)

Japan is also the world’s largest or second-largest LNG importer, sourcing a dominant share from Qatar and other Gulf producers. LNG powers roughly a third of Japan’s electricity generation following its post-Fukushima nuclear drawdown. A loss of Gulf LNG would immediately threaten grid stability, with cascading effects across manufacturing, services, and residential supply. Japan has limited LNG storage capacity and no pipeline gas import option. The combined loss of Gulf oil and Gulf LNG would place Japan under extraordinary simultaneous pressure on two of its three primary energy sources.

South Korea

South Korea is consistently among the top three LNG importers globally, with Qatar one of its largest suppliers. Gas fires a substantial share of South Korea’s power generation. Like Japan, it has no pipeline import option and limited domestic gas production, making seaborne LNG the only supply mechanism. Power shortages would ripple through its semiconductor fabs and shipyards — both globally critical industries.

European Union — Particularly Germany, Italy, the Netherlands, Belgium, and France

Continued…