The Embargo That Started the Playbook
In October 1973, after the Yom Kippur War, Arab producers organized in OAPEC aimed an embargo at the United States and the Netherlands, and output cuts squeezed other allies, the UK and Japan among them. The economics were immediate and brutal. Crude that had traded around $2.90 a barrel before the embargo reached $11.65 by January 1974, a factor of 4.02 on the Federal Reserve History figures, still the sharpest price move of any modern oil shock. The embargo officially ended in March 1974, but the damage lingered: the National Bureau of Economic Research dates a US recession from November 1973 to March 1975, sixteen months long. Britain printed motor fuel ration books in November 1973 and never had to use them. The institutional legacy was permanent, the International Energy Agency itself, created in November 1974 precisely because 1973 had caught the consuming countries with no collective response.
How 2026 Compares
Set against that benchmark, what the 2026 war did to Hormuz is a different order of event. Strikes on Iran began on 28 February 2026, tanker traffic through the waterway halted, and world oil supply fell by 10.1 million barrels a day in March, down to 97. The IEA’s April 2026 Oil Market Report branded it “the largest disruption in history”, and by the agency’s own March statement, “the volume of fuel supply offline now is higher than the supply loss during the oil shock of 1973 that led to the IEA’s creation and any disruption since then”. The arithmetic is stark: the 2026 loss is 2.3 times the 4.3 million barrels a day that the embargo removed, and it claimed 9.4% of world supply in March and 11.9% in April, against the roughly 7.5% fall in Arab OPEC output that the economist James D. Hamilton tallied for 1973.
Price Against Volume
On price, 1973 still wins. Brent spot climbed 94% in 2026, rising between 27 February and 7 April from $71.32 to $138.21, with a $144 Dated Brent high in the IEA series and front-month futures topping out at $118 on 29 April, and spot still sitting at $114.89 on 22 September. Useful numbers, but less than half the proportional surge of 1973-74. The World Bank, using the same IEA definition, put March’s loss near 10 million barrels a day in its April Commodity Markets Outlook and called it “the largest oil supply shock on record”.
The Response and the Open Question
The emergency toolbox that existed in 2026 exists because of 1973. The IEA’s members took their first collective stock action only in January 1991, a 2.5 million barrel a day plan during the Gulf War; nothing of the kind happened in 1973, 1979, 1980 or 2008. The 2026 release became the largest in the agency’s history, agreed at 400 million barrels on 11 March and confirmed a week later at 426 million, with the United States pitching in 172.2 million barrels of public stock and the UK 14.0 million out of industry holdings. The agency’s own Oil Market Report called the release “significant and welcome buffer” but warned that without a swift end to the conflict it was “a stop-gap measure”. That warning has aged well: Gulf oil exports were still estimated near 13 million barrels a day in August, which the IEA called “nearly half their pre-war level”. Whether the shock produces a US recession remains formally undecided, and the NBER’s own record argues patience, since it did not call the December 2007 peak until 1 December 2008. RAND Europe, for its part, is still teaching the 1973 embargo as the master class in coercion economics, running a closed-door foresight forum on the episode in London in February 2027.
Sources
- Oil Shocks Compared: Is 2026 Worse Than 1973? | GOS
- Resilience and Foresight Forum: The 1973 Oil Embargo | RAND
