10 of 11 Post-World War II Recessions Preceded by Oil Price Increases, According to Economist's Research

By Joseph Lawler

*Published: 2026-04-13T11:00:00+00:00*

The price of oil has risen sharply amid the ongoing conflict with Iran, which includes the closure of the Strait of Hormuz, a critical global oil chokepoint. Research by economist James Hamilton of the University of California, San Diego, indicates that oil price increases have preceded 10 of the 11 post-World War II recessions prior to the COVID-19 pandemic, as dated by the National Bureau of Economic Research (NBER). The exception was the recession that began in 1960.

Hamilton's analysis, detailed in his academic work on oil markets and economic cycles, focuses primarily on exogenous supply-driven oil price shocks—such as those caused by geopolitical events or embargoes—rather than increases driven by rising demand. He distinguishes these from demand-driven spikes, noting that supply disruptions have a more consistent historical link to subsequent recessions.

Since Iran closed the Strait of Hormuz to oil tanker traffic, Brent crude—the international benchmark—has climbed from below $60 per barrel to as high as $112 per barrel.

In an email to the Washington Examiner, Hamilton stated: “The dramatic slowdown in oil shipments through the Strait of Hormuz definitely increases the risk of an economic recession. The key question is how long the conflict continues.”

Historical examples illustrate the patterns in Hamilton's research. During the 1956 Suez Crisis, a supply disruption blocked Middle Eastern oil shipments to Europe, leading to a sharp rise in oil prices. The U.S. entered a recession in 1957.

Demand-driven increases have also coincided with some recessions. For instance, oil prices rose nearly 40% in late 1999 and early 2000 amid strong global demand, preceding the 2001 recession following the dot-com bust. However, Hamilton's work emphasizes that supply shocks pose a distinct risk, as they reduce available energy supplies and amplify economic pressures independently of demand trends.

The current oil price increase stems from a supply disruption due to the Strait closure, aligning with the type of shock Hamilton identifies as particularly concerning. The U.S. economy entered this period with low unemployment but faced challenges including slower job growth and subdued expansion in the first quarter.

Sean Snaith, director of the University of Central Florida’s Institute for Economic Forecasting, noted that the duration and severity of the Strait closure could influence recession risks. “How long is it going to go on, and how severe is it going to get?” he said. “And I think if you move in either direction in terms of length or severity, you see a heightened risk of recession that comes along with that.”

The White House has stated that oil prices are expected to decline once the conflict with Iran concludes, limiting broader economic impacts. President Donald Trump told the Washington Examiner that secondary effects, such as elevated interest rates tied to the war, would also reverse post-conflict.

As the situation persists, industries have adjusted to higher fuel costs. Airlines have introduced baggage surcharges to cover increased jet fuel expenses, and some shipping firms have raised diesel-related fees. Over time, this could affect prices for petroleum-derived consumer goods, such as medical IV tubes.

Hamilton's research points to declining consumer sentiment as a primary channel through which oil price increases affect the broader economy. Higher gasoline prices at the pump, encountered frequently by drivers, contribute to this effect.

Consumer Confidence Hits Record Low

Consumer confidence was already low prior to the conflict. University of Michigan surveys reported sentiment at a record low in April, lower than during the peak of the Great Recession or COVID-19 shutdowns.

Hamilton suggested monitoring additional indicators, including auto sales and initial unemployment claims. Auto sales, which could decline if households defer major purchases like gas-powered vehicles, actually increased in March, according to the Bureau of Economic Analysis.

Initial jobless claims, a weekly measure of labor market conditions, remained low throughout March.

A potential concern is that sustained oil price increases could lead the Federal Reserve to misinterpret headline inflation data, prompting premature monetary tightening. This occurred in 2008: Despite weakening demand by late 2007, high oil prices elevated overall inflation to around 5% in summer 2008, while core inflation (excluding food and energy) stayed near the Fed's 2% target. The Fed maintained its federal funds rate target at 2% from April until after Lehman Brothers' collapse in September, a period some economists describe as "passive tightening" that exacerbated job losses.

Kevin Warsh, then a Federal Reserve Board of Governors member and now President Trump's nominee for Fed chair, expressed inflation concerns as late as September 16, 2008—after Lehman's failure. At a Federal Open Market Committee meeting, he said: “I’m still not ready to relinquish my concerns on the inflation front.”

Current Fed officials appear more aware of such dynamics. In a press conference last month, Chair Jerome Powell referenced the traditional approach of "looking through" energy shocks, indicating the Fed would not automatically raise rates in response. He added that officials would monitor for secondary economic effects.

New York Federal Reserve Bank President John Williams echoed this view this week on Bloomberg, stating he did not anticipate long-term pressure on underlying inflation from the oil disruption. “Monetary policy today is really well positioned” to handle such events, he said. “Monetary policy is exactly where it needs to be, and then we can respond if the situation changes.”

Trump: Oil Will Flow ‘With or Without’ Iran’s Help, Warns Against Tanker Fees

The Strait of Hormuz handles about 20% of global oil trade, per U.S. Energy Information Administration data. Its closure has rerouted shipments, increasing transit times and costs. Alternative routes, such as pipelines through Saudi Arabia or the UAE, have capacity limits and cannot fully offset the disruption.

Hamilton's original research, including his 1983 paper "Oil and the Macroeconomy since World War II" and subsequent updates, documents the 10-of-11 pattern using quarterly oil price data preceding NBER recession dates from 1948-1949 through 2007-2009. The 1960-1961 recession followed a brief oil price dip amid ample supply.

Prolonged high oil prices could strain sectors like manufacturing and transportation, which account for significant U.S. energy consumption. The American Petroleum Institute reported a 15% drop in Hormuz transits in the first month of closure.

Economists like Snaith highlight uncertainty as a key factor. Extended disruptions might prompt businesses to cut investment, while resolution could stabilize markets quickly, as seen after the 1979 Iranian Revolution when prices peaked then fell.

The Fed's current stance reflects lessons from past episodes. Post-2008, officials adopted forward guidance and core inflation measures to better distinguish transitory shocks from persistent pressures.

As of early April, Brent crude hovered around $105 per barrel, down slightly from its peak but still double pre-conflict levels. Global stockpiles provide a buffer, but drawdowns could accelerate if the Strait remains closed.

White House economic advisers project a return to sub-$70 oil within months of conflict resolution, citing increased U.S. production and spare OPEC capacity.

In summary, while historical data links supply-driven oil shocks to recessions, the outcome depends on the disruption's duration and policy responses. Officials continue to track real-time indicators amid evolving geopolitical developments.

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