Global oil markets are increasingly pricing in the possibility that the economic consequences of the Iran war will persist for years, raising concerns about inflation, fuel shortages and the cost of international trade.
Brent crude futures for delivery in December 2027 have risen more than 13% since the beginning of September to around $86 a barrel, reaching a record for the contract. December 2026 futures have also gained approximately 12%, signalling that traders are preparing for prolonged supply uncertainty rather than a quick return to normality.
The shift comes eight months into the conflict, as declining oil inventories, damaged refining capacity and renewed threats to shipping through the Strait of Hormuz undermine expectations of a rapid recovery in global energy supplies.
Although futures prices do not provide a definitive forecast of where oil will trade, they indicate that refiners, airlines and commodity traders are increasingly willing to pay more to protect themselves against future supply disruptions.
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Oil Supply Recovery Faces Growing Uncertainty
The market’s increasingly cautious outlook contrasts with expectations that global oil production will recover substantially in 2027.
The International Energy Agency forecasts that global oil supply will rise to 108.3 million barrels per day in 2027, compared with 100.7 million barrels per day in 2026, as Middle Eastern exports recover.
Global demand is projected to increase from 102.4 million barrels per day this year to 104.4 million barrels per day next year. However, demand would remain slightly below its 2025 level, with much of the anticipated growth concentrated in petrochemical feedstocks rather than transportation fuels.
These projections suggest that the market could face a substantial supply surplus in 2027, which would ordinarily put downward pressure on prices.
However, rising long-term futures indicate that investors are increasingly concerned that the expected recovery may be delayed or prove insufficient to repair the damage caused by months of conflict.
The central uncertainty remains the confrontation between Washington and Tehran over the Strait of Hormuz, a strategic waterway essential to international energy shipments.
Although oil flows through the strait have recently recovered towards pre-war levels with US naval support, renewed Iranian attacks on vessels and threats of further disruption have left the recovery vulnerable.
The conflict has also expanded beyond the immediate Gulf region. Yemen’s Iran-aligned Houthis have intensified missile and drone attacks on Saudi Arabia, including strikes targeting the headquarters of state-owned oil company Saudi Aramco in Dhahran.
These developments have increased the security risks associated with transporting energy from the region.
Shipping Costs Add to the Oil Price Premium
The cost of moving oil out of the Gulf has risen sharply as shipping companies contend with higher insurance premiums, elevated freight rates, complex logistics and the need for military protection.
According to the report, these expenses now account for nearly one-third of the cost of transporting a barrel of oil from the region, compared with approximately 3% before the war.
Even if crude production recovers, these additional costs could continue to affect prices unless a durable political settlement reduces the risks surrounding the Strait of Hormuz.
This creates a challenge for energy-importing economies, which must contend not only with the price of crude but also with the additional expenses associated with securing and transporting supplies.
For businesses, persistent uncertainty also makes it harder to plan fuel purchases, manage operating costs and make long-term investment decisions.
Diesel Shortages Raise Inflation Concerns
The pressure on energy markets is particularly acute in diesel, a fuel essential to freight transportation, agriculture, manufacturing and industrial activity.
European benchmark diesel futures reached a record $1,480 per metric tonne in mid-September, equivalent to approximately $210 per barrel, as supply disruptions in the Middle East and Russia tightened the market.
The war in Ukraine has further weakened global refining capacity. Ukrainian drone attacks have damaged Russian refineries, prompting Moscow to ban diesel exports earlier this year.
US President Donald Trump subsequently announced an agreement with Russian President Vladimir Putin to allow some Russian diesel exports to resume. Trump also announced another energy ceasefire between Russia and Ukraine.
However, the additional exports cited by Trump represent only a small fraction of global supply, equivalent to roughly 12 hours of worldwide consumption. The reported ceasefire has also attracted limited confidence from market participants.
Traders are therefore focusing on the broader loss of refining capacity rather than expecting a rapid improvement in supply.
Diesel futures for delivery in December 2027 have climbed above $1,000 per tonne, compared with approximately $644 before the Iran war.
The increase matters because diesel prices can influence costs throughout the global economy. Higher fuel expenses raise the cost of transporting goods, operating machinery and producing food, potentially feeding into consumer prices long after crude oil prices begin to stabilise.
Higher Energy Costs Complicate Inflation Control
Persistently expensive oil and diesel could complicate efforts by central banks to bring inflation under control.
US inflation reached 3.7% in September, according to the figures cited in the report, remaining well above the Federal Reserve’s 2% target. Core inflation has also been edging higher.
If energy prices remain elevated, businesses may pass additional transportation and production costs on to consumers, making it harder for policymakers to reduce inflation without slowing economic activity.
The consequences would extend beyond the United States. Economies dependent on imported fuel could face higher import bills, pressure on their currencies and increased costs for electricity, transport and essential goods.
For developing economies with limited fiscal resources, prolonged energy price increases could also complicate efforts to support households while maintaining economic stability.
The impact will depend on how long supply disruptions persist, how much additional production becomes available and whether governments can secure alternative sources of energy.
Why the Iran War Could Reshape Long-Term Oil Markets
For much of 2026, traders treated the Iran war as a temporary shock that would eventually give way to a recovery in production and trade. The latest movement in long-dated oil and diesel futures suggests that confidence in that assumption is weakening.
The challenge is no longer limited to restoring shipments through the Strait of Hormuz. Months of disruption have also reduced inventories, damaged refining capacity and increased the cost of moving energy across international markets.
Rebuilding those buffers could take time, even if the conflict ends and shipping conditions improve.
The outlook for 2027 will therefore depend on more than the restoration of crude production. It will also hinge on the recovery of refining operations, the replenishment of inventories and the ability of shipping companies to resume normal operations without extraordinary security costs.
If these conditions fail to improve, the global economy could face a prolonged period of elevated energy prices, adding to inflationary pressures and weighing on growth.
For governments, businesses and consumers, the emerging risk is that the economic consequences of the Iran war will outlast the conflict itself, turning what initially appeared to be a temporary supply shock into a more persistent challenge for the global energy system.
With information from Reuters.
