Iran Conflict: Could Rising Energy Costs Trigger a Spike in U.S. Grocery Prices?

The Strait of Hormuz, a critical chokepoint for global oil and gas shipments, has been blocked for over a month, disrupting energy supplies and driving up prices for gasoline, diesel, fertilizers, plastics, and other essential commodities. This has raised fears among Americans that rising energy costs could soon translate into higher grocery prices. Yet, according to the latest Consumer Price Index (CPI) data from March, food prices remained unchanged from February.

Additionally, reports indicate that the U.S. and Iran have reached a deal to fully reopen the Strait of Hormuz for the duration of their ceasefire. However, a permanent peace agreement has not yet been finalized, leaving uncertainty about the future. Will Americans avoid a war-induced spike in food prices? What happens if the ceasefire collapses and peace talks fail?

To address these concerns, we spoke with Ken Foster, an agricultural economist at Purdue University. Our conversation has been condensed for clarity.

Why Haven’t Food Prices Risen Yet?

Despite the energy shock from the Strait of Hormuz blockade, food prices have not yet surged. Is this a sign that Americans can breathe easy, or is it merely the calm before the storm?

Foster explains that the impact of rising energy costs on food prices is not immediate. Many oil and gas shipments that left the Strait of Hormuz at the start of the conflict have only recently reached their destinations. Additionally, food producers often operate on contracts based on pre-war energy prices, delaying the full effect of cost increases.

For example, consider food products transported by trucks or trains running on diesel. Much of this diesel is pre-priced, meaning the full impact of rising fuel costs may take weeks to filter through the supply chain. Intermediate players in the supply chain, such as manufacturers, may absorb some of these costs in the short term. However, they cannot sustain this indefinitely.

Retailers, too, are often hesitant to raise prices immediately due to competitive pressures. Still, early signs suggest that the energy shock is beginning to affect supply chains. This week, the government released new Producer Price Index (PPI) data, which breaks down the intermediate stages of the food supply chain into four phases—from production to pre-retail.

What Happens If the Ceasefire Collapses?

If the ceasefire between the U.S. and Iran fails, and the Strait of Hormuz remains closed, the delayed effects of the energy shock could soon materialize in grocery prices. Foster warns that the full impact may take weeks or even months to become apparent, as contracts expire and supply chains adjust to higher costs.

The situation underscores the interconnectedness of global energy and food markets. Even if food prices have not yet risen, the risk of a significant increase looms if the conflict escalates or the ceasefire breaks down.