This week, 32 countries coordinated a release from emergency crude stockpiles to try to calm soaring oil prices — an action quickly eclipsed by intensified Iranian attacks around the Strait of Hormuz. The International Energy Agency (IEA), which groups major energy‑consuming nations, agreed to make hundreds of millions of barrels available from strategic reserves. Despite that move, Brent crude remained near $100 a barrel by week’s end after briefly spiking to about $119.50 earlier in the week as fighting around the waterway disrupted tanker traffic.
Why countries keep strategic oil reserves
Strategic oil reserves are government‑controlled stores of crude (and in some cases refined fuels) held to cushion supply shocks or market emergencies. The modern concept dates to the 1970s: the United States created its Strategic Petroleum Reserve after the 1973 Arab oil embargo exposed how quickly economies could be hit by sudden production cuts and price spikes.
Today dozens of countries, mostly IEA members, maintain emergency stocks as part of a system meant to protect energy security. IEA members collectively hold more than 1.2 billion barrels in public emergency reserves, with roughly another 600 million barrels held by industry.
Who holds the most
China is widely believed to have the largest strategic stockpile, estimated by analytics firm Vortexa at about 1.3 billion barrels — a figure Beijing does not publish publicly. That amount would cover roughly three to four months of Chinese oil demand at typical consumption rates.
The United States’ federal Strategic Petroleum Reserve contains about 415 million barrels, supplemented by roughly 439 million barrels held by private industry, which together amount to more than 40 days of emergency supply. Other major holders include a range of IEA members in Europe and Asia, each keeping reserves to meet their 90‑day guideline for net oil imports (with exceptions for major exporters).
What the IEA agreed to release
The IEA announced a coordinated release of 400 million barrels from member emergency stockpiles. For context, the previous record coordinated release after Russia’s 2022 invasion of Ukraine was 182 million barrels. The agency said the 400 million barrels will be supplied gradually according to each country’s capacity and circumstances.
The U.S. plans to lead the effort with about 172 million barrels from its SPR, to be delivered over roughly 120 days. Japan announced roughly 80 million barrels would be made available from a mix of public and private stocks — about 45 days of typical domestic demand. Other contributing countries include Germany, Australia, France, South Korea and the United Kingdom.
How reserves differ and who is exempt
Reserve systems vary. The U.S. stores crude in underground salt caverns along the Gulf Coast, while many European countries hold a mix of crude and refined products such as diesel and jet fuel. IEA members are expected to hold about 90 days of net import cover, though major exporters are allowed different arrangements. Pure net exporters like Canada, Mexico and Norway do not have mandatory public emergency stockpiles but can rely on commercial inventories if needed.
China, which is not a full IEA member, made no matching announcement. Beijing has stopped refined fuel exports to protect domestic supply and has signaled continued expansion of its strategic oil stocks under its latest five‑year economic plan.
Will the release lower prices?
Analysts say emergency releases can ease short‑term pressure and send a political signal that governments will intervene, but they rarely cause a dramatic or sustained fall in oil prices. The IEA itself noted the 400 million barrels roughly cover three to four weeks of the lost Gulf flows — small relative to the roughly 100‑million‑barrel‑a‑day global market.
Markets reacted with skepticism. Some analysts argued the coordinated move, while sizable on paper, was too limited to offset a de facto shutdown of the Hormuz chokepoint caused by recent attacks. That perception, combined with continued military disruptions, has kept upward pressure on prices and left traders uncertain about the durability of the relief.
Risks moving forward
If the Strait of Hormuz — a conduit for about a fifth of global oil and gas exports, mainly to Asia — remains disrupted, analysts warn losses could quickly exceed what coordinated stock releases can replace. Prolonged conflict or sustained attacks on shipping and terminals would risk deeper and longer market dislocations than the emergency reserves alone can solve.
Bottom line
Strategic reserves are a critical short‑term tool to stabilize markets and reassure traders, but they are limited in size relative to daily global demand. China appears to hold the world’s largest stockpile, while the U.S. maintains the largest officially disclosed federal reserve. The IEA’s 400 million‑barrel release will provide temporary supply but is unlikely by itself to restore calm if disruption around the Strait of Hormuz continues.