This revised report sets out the key business context behind Could the Red Sea Trigger an Even Bigger Oil Shock? Hormuz, Houthis and the Bab el-Mandeb Risk Explained, preserving the original facts while improving clarity and flow.
The 2026 Iran war created a historic disruption to global oil supply by severely reducing traffic through the Strait of Hormuz. A second danger then became increasingly important: disruption to the Red Sea and the Bab el-Mandeb Strait, another route used by tankers and commercial ships.
The concern was not that a larger oil shock was guaranteed. It was that the energy system had already lost a major export route, making alternative routes unusually valuable. If those alternatives also came under sustained attack, the world would have fewer ways to move Gulf oil to international markets.
That risk became more visible as Yemen’s Iran-aligned Houthi movement renewed threats against shipping in the Red Sea.
Understanding the issue requires looking at two separate maritime chokepoints, the pipelines that can bypass them and the difference between a physical supply loss and the fear of a future one.
The first shock: the Strait of Hormuz
The Strait of Hormuz connects the Persian Gulf with the Gulf of Oman and the Arabian Sea.
Before the 2026 conflict, more than 20 million barrels a day of crude oil, refined fuels and related petroleum liquids could move through the route.
When the war sharply reduced traffic, the effect was enormous.
In April, the International Energy Agency described the conflict as causing the largest oil supply disruption in history.
The agency estimated that 10.1 million barrels a day of supply had been lost in March.
Why alternative routes became so important
Gulf producers are not completely dependent on Hormuz.
Saudi Arabia and the United Arab Emirates have pipelines capable of moving some crude to ports outside the Strait.
Saudi Arabia’s East-West pipeline can move crude from the country’s eastern producing regions to the Red Sea coast.
That route became especially valuable once normal Gulf tanker traffic was severely disrupted.
However, alternative pipelines cannot instantly replace all the volumes that normally pass through Hormuz.
The second chokepoint: Bab el-Mandeb
Oil shipped from Saudi Red Sea ports still enters another strategically sensitive maritime corridor.
The Bab el-Mandeb Strait connects the Red Sea with the Gulf of Aden and the Arabian Sea.
Ships using the Suez Canal route between Europe and Asia generally pass through this area.
If Bab el-Mandeb becomes unsafe, tankers may have to sail around the Cape of Good Hope at the southern tip of Africa, dramatically increasing journey distances and costs.
Why Houthi threats mattered
The Houthi movement controls large parts of Yemen and has previously attacked commercial shipping in the Red Sea.
During the 2023-25 period, those attacks caused many shipping companies to avoid the Red Sea and reroute vessels around Africa.
In 2026, renewed Houthi threats raised concern that the Red Sea could again become dangerous just when it was becoming more important as an alternative to Hormuz.
This created the possibility of a two-chokepoint energy problem.
Does that mean all Red Sea shipping would stop?
No.
A threat does not automatically close a maritime route.
Different shipping companies make different risk assessments, and naval forces may escort or protect vessels.
The Houthis also stated particular targeting criteria at different points rather than claiming every merchant ship was a target.
However, even selective attacks can increase insurance premiums and cause operators to reroute ships because companies may not be confident that targeting rules will be applied consistently.
Why insurance can amplify a supply shock
Energy supply depends on ships being willing and able to carry cargo.
A producer can have oil ready for export, but if insurers charge extremely high war-risk premiums or shipowners refuse the voyage, effective supply can still fall.
This is why maritime security matters to commodity prices.
The economic effect of an attack extends beyond the vessel that is actually damaged.
The importance of Saudi Arabia’s Red Sea route
Saudi Arabia is one of the world’s largest oil exporters.
Its ability to move crude westward to Red Sea ports provides a partial bypass around Hormuz.
During the 2026 crisis, that route helped reduce the amount of Gulf production completely trapped by the disruption.
If Red Sea shipping were also heavily constrained, some of that strategic flexibility would be lost.
That is the core logic behind warnings about a possible “bigger” oil shock.
Why the world cannot simply replace Gulf oil overnight
Other producers can increase exports, but spare production capacity is limited.
Different refineries are also designed to process different types of crude.
A refinery that normally uses medium sour crude from the Gulf cannot always replace it instantly with any available oil from another country.
Shipping distances, port capacity and pipeline connections create additional constraints.
What the IEA said about the scale of the shock
By 14 April, the International Energy Agency had radically revised its 2026 outlook.
It forecast that world oil supply would shrink by 1.5 million barrels a day over the year rather than grow as previously expected.
The agency also expected oil demand to decline because high prices and scarcity would reduce consumption.
It called restoration of Hormuz flows the single most important variable for easing pressure on energy prices and the global economy.
Why demand can fall during an oil shock
Oil demand is not fixed.
If fuel becomes extremely expensive, consumers and businesses change behaviour.
People may drive less, airlines may cut capacity, factories may reduce production and governments may impose or encourage conservation measures.
Economists sometimes call this demand destruction.
It reduces pressure on supply, but it can also signal weaker economic activity.
Why Asia was particularly exposed
Many Asian economies import large volumes of Middle Eastern oil and gas.
They therefore face both higher energy prices and potential physical shortages when Gulf exports are interrupted.
Countries with large strategic reserves, diversified suppliers or strong domestic energy production have more protection.
Others may need to ration fuel, subsidise consumers or reduce industrial use during severe disruptions.
Why Europe was exposed even after reducing Russian energy imports
Europe spent years reducing dependence on Russian fossil fuels after the invasion of Ukraine.
That increased reliance on a wider set of suppliers, including LNG and oil from the Middle East and elsewhere.
Diversification reduced exposure to one supplier but did not make Europe immune to global commodity shocks.
When international oil and gas prices rise, European households and businesses can still face higher costs.
Could OPEC+ replace the missing barrels?
OPEC+ producers can adjust output targets, but the ability to compensate for a disruption depends on actual spare capacity and the ability to export additional oil.
A producer inside the Gulf may have spare production capacity but still face difficulty moving extra barrels if shipping routes are constrained.
This is another reason the crisis was not simply a question of how much oil existed underground.
Transport infrastructure was part of the supply problem.
What about emergency oil reserves?
Governments hold strategic petroleum reserves to respond to severe supply disruptions.
Releasing those stocks can temporarily replace missing commercial supply and reduce panic.
But reserves are finite.
They work best as a bridge while normal production or trade routes recover, not as a permanent replacement for millions of barrels a day of lost supply.
Why the Red Sea had already proved vulnerable
Shipping companies had recent experience of avoiding the Red Sea because of Houthi attacks.
Many container ships and some tankers rerouted around Africa during the earlier campaign.
Those longer voyages increased fuel use, freight rates and delivery times.
That experience meant companies did not have to imagine what a major Red Sea disruption might look like; they had already operated through one.
Why a double disruption would be different
During previous Red Sea disruption, the Strait of Hormuz continued functioning normally.
During the 2026 Iran war, Hormuz itself was already severely restricted.
That makes the combination more dangerous.
One route cannot serve effectively as a backup if it is facing its own security crisis at the same time.
What later Houthi threats showed
By June 2026, Houthi announcements again highlighted the vulnerability of the Red Sea route.
The group declared restrictions and threats against vessels it associated with Israel, raising renewed concern over Bab el-Mandeb.
Those statements did not automatically stop all traffic, but they demonstrated that the risk had not disappeared after the initial weeks of the Iran conflict.
Why energy markets price risks before they happen
Commodity traders do not wait for a worst-case scenario to become reality.
If the probability of a serious disruption rises, prices may increase immediately.
This risk premium compensates for the chance that future supply will be harder to obtain.
If the threat later recedes, some of that premium can disappear just as quickly.
Could higher oil prices cause a recession?
Very high energy prices can weaken economic growth because households have less money available for other spending and businesses face higher operating costs.
Central banks may also face the difficult combination of higher inflation and weaker growth.
However, the economic effect depends on how high prices rise, how long the disruption lasts and how governments respond.
A short spike is very different from a year-long shortage.
What would reduce the risk?
The most important development would be a sustained restoration of commercial flows through Hormuz.
Reduced Houthi threats and secure passage through Bab el-Mandeb would also improve the resilience of alternative routes.
Additional non-Gulf supply, emergency reserves and demand reduction can provide further relief.
No single measure can fully substitute for normal operation of the main shipping routes.
What readers should understand about “bigger oil shock” headlines
A warning about a larger shock is a risk scenario, not a prediction guaranteed to happen.
Headlines often compress conditional analysis into dramatic language.
The more accurate explanation is that simultaneous disruption at Hormuz and Bab el-Mandeb would remove important flexibility from the global energy system and could therefore deepen supply losses.
Whether that scenario occurs depends on military, diplomatic and commercial decisions.
Conclusion
The 2026 Iran conflict had already created what the IEA called the largest oil supply disruption in history.
Concern about an even bigger shock centred on the possibility that Red Sea routes could also come under sustained pressure just as Saudi Arabia and other producers were relying more heavily on alternatives to Hormuz.
The Bab el-Mandeb Strait is therefore not a secondary detail. It is part of the network that determines whether oil can reach international markets when Gulf routes are disrupted.
A two-chokepoint crisis was not inevitable, but the risk showed how fragile global energy logistics can become when several strategic routes are threatened at once.
Sources and further reading
See Reuters’ report on the IEA’s April oil-market assessment and subsequent reporting on Red Sea shipping risks.
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