The International Energy Agency has agreed to release a record 400 million barrels of oil from strategic stockpiles in an effort to calm global crude markets following the outbreak of war involving the United States, Israel and Iran.

The decision represents the largest coordinated emergency stock release ever proposed by the Paris-based energy watchdog.

The move comes as fears of supply disruptions linked to tensions around the Strait of Hormuz pushed global oil prices sharply higher earlier this week.

Strategic stock releases are typically designed to stabilize markets during supply disruptions by temporarily increasing physical oil availability.

According to David Fyfe, chief economist at UK-based Argus Media, such releases serve primarily as a short-term bridge.

They are intended to increase physical liquidity in the market while producers and traders adjust supply chains or until the disruption itself eases.

The scale of the latest intervention is unprecedented.

If the full 400 million barrels were released over a three-month period, it could add roughly 4.4 million barrels per day of additional supply to global markets, depending on how quickly governments choose to release the crude and whether the market absorbs the available barrels.

Member governments within the IEA framework retain discretion over how and when their strategic reserves are deployed.

That means the actual pace of supply reaching the market could vary widely.

Markets may already be responding to the prospect of a coordinated release.

Rumours of an emergency stock draw earlier in the week coincided with a sharp fall in futures prices for Brent crude. Prices eased from levels near $120 per barrel to closer to $90 as traders began anticipating a potential intervention.

But analysts caution that the impact of strategic reserves will depend largely on developments in the Gulf.

If shipping through the Strait of Hormuz remains restricted for a prolonged period, the ability of stock releases alone to cap prices could prove limited.

Strategic reserves are, by definition, temporary buffers.

They cannot permanently offset a sustained supply disruption in one of the world’s most important oil transit routes.

Meanwhile, demand for physical crude continues despite the price volatility.

According to Tom Reed, head of China crude and products at Argus Media, oil buyers have little choice but to remain active in the market.

Even in China, which holds vast strategic petroleum reserves comparable in size to the entire IEA stockpile, refiners are returning to the market and paying elevated prices for cargoes.

Companies understand that even large national inventories cannot sustain indefinite releases to compensate for a supply shock of this magnitude.

That reality helps explain the divergence emerging between paper markets and physical trading.

Futures prices can fall rapidly on expectations of government intervention or improved supply.

Physical cargoes, however, continue to trade at elevated prices when refiners urgently need feedstock.

As Reed puts it, futures prices reflect opinion.

A cargo of jet fuel or naphtha available today reflects the reality of the market.

For now, the coordinated release of strategic reserves may help cool the panic that swept oil markets earlier in the week.

But the ultimate direction of prices will depend less on stockpiles and more on whether oil continues to flow freely through the Gulf.