Hormuz blockade is the largest oil supply shock in history — four times bigger than any prior disruption
Mar 9, 2026
Key Points
- A Hormuz blockade removes 20 million barrels per day from global supply, four times larger than any prior oil shock in recorded history.
- With crude running $30 to $40 above baseline, Goldman Sachs models put CPI near levels that rule out Fed rate cuts, even as the labor market softens.
- JPMorgan estimates Germany's nuclear phaseout left the country paying roughly 25% more for electricity in 2024, a costly counterfactual as Middle East supply risk spikes.
Summary
A blockade of the Strait of Hormuz has triggered what appears to be the largest oil supply shock in recorded history, with 20 million barrels per day removed from global supply. That is roughly four times the scale of any prior disruption. The Iranian Revolution in 1978 removed 5.6 million barrels per day, the Yom Kippur War embargo in 1973 removed 4.4 million, the Iraq-Kuwait war in 1990 removed 4.3 million, and the Russia-Ukraine invasion in 2022 removed between 1 and 3 million.
Macro pressure
Crude briefly hit $111 a barrel before pulling back, with an overnight spike to nearly $120 before settling around $100. Goldman Sachs estimates that a $10 increase in oil prices sustained for three months would lift US headline CPI from 2.4% in January to around 3% by May. The current shock is running $30 to $40 above baseline, which puts the Fed in a difficult position. Inflation at that level would normally argue against rate cuts, but the labor market is softening at the same time. Rate cuts look increasingly off the table.
The PolicyTensor analysis, offered with an acknowledged ideological lean, holds that the US has no military path to reopening Hormuz, giving Iran structural leverage to keep the strait closed until there is political capitulation. Markets appear to be pricing something close to that scenario.
Economist Scott Sumner argues on his Substack that visible market panic can itself constrain policy by raising the political cost of inaction or escalation. Tariffs are the cited precedent, where a sharp sell-off accelerated carve-outs. The same dynamic may be operating now.
Germany's nuclear counterfactual
JPMorgan estimates that had Germany not phased out nuclear power, the country would have generated 50% less electricity from fossil fuels and 84% less from natural gas in 2024. Electricity prices would have been roughly 25% lower, and Germany would have imported half as much electricity. At a moment when European energy exposure to Middle East supply routes is acute, that data point carries weight.
AI infrastructure exposure
Most AI-focused observers have treated the Hormuz situation as background noise, with attention concentrated on recursive self-improvement, AGI timelines, and data center buildout. Oil prices affect data center construction costs, hardware logistics, and ultimately token pricing. It remains unclear how much the current shock flows through to AI infrastructure costs.