Diesel prices nearly double since January, stoking US inflation

US diesel prices have nearly doubled since January, a surge that is feeding into inflation, squeezing trucking and farm margins, and threatening higher food prices as Brent crude holds above $90 a barrel.

"With Brent crude rising above $90 a barrel and the reopening of the Strait of Hormuz remaining unresolved, oil prices will remain a key monitorable for inflation and capital flows," said Siddhartha Khemka, head of research at Motilal Oswal Financial Services.

Diesel, the workhorse fuel for freight and agriculture, has climbed roughly 90 percent since the start of the year, according to the report. The move tracks Brent crude, which has risen above $90 a barrel after the temporary US-Iran ceasefire expired without a lasting resolution. The US 10-year Treasury yield has climbed to about 4.7 percent, reducing the appeal of risk assets and raising the cost of carrying fuel inventories, while the rupee has weakened to about 95.7 per dollar as oil imports get costlier.

The stakes extend beyond the pump. Diesel is embedded in nearly every supply chain — trucking moves most US freight by value and farm equipment runs on the fuel — so higher prices translate into higher costs for food, retail goods, and construction. That threatens to keep inflation sticky even as the Federal Reserve weighs the path of interest rates, and it could reshape the political contest as voters feel the pinch at the grocery store and gas station.

Freight and Farm Margins Under Pressure

Diesel powers the trucks that move roughly 70 percent of US freight by value, and a near-doubling in fuel costs since January has forced carriers to raise surcharges that ripple through retail prices. Farmers face a similar squeeze: diesel runs tractors, harvesters, and irrigation pumps, so input costs for planting and harvesting have climbed in step with the fuel.

The transmission is direct. Every dollar increase in diesel per gallon adds to the cost of moving goods, and carriers typically pass those costs to consumers within weeks. With Brent above $90 a barrel and the Strait of Hormuz — through which about a fifth of global oil flows — still disrupted, refiners face higher feedstock costs that keep diesel prices elevated.

The last time diesel spiked this sharply was during the 2022 energy crisis after Russia's invasion of Ukraine, when US pump prices hit record highs and freight surcharges surged. That episode showed how quickly fuel costs feed into headline inflation, a pattern now repeating as geopolitical risk keeps supply tight.

Inflation and the Political Fallout

The fuel surge complicates the inflation picture. Core inflation has been slow to cool, and a sustained rise in diesel threatens to keep headline readings elevated by pushing up food and transport costs. That gives the Federal Reserve less room to cut rates, with the 10-year Treasury yield near 4.7 percent reflecting expectations of a longer period of tight policy.

The political stakes are equally high. Fuel and food prices are among the most visible costs for households, and a sustained surge ahead of elections could weigh on consumer sentiment and reshape the political contest. If diesel prices hold near current levels through the harvest season, food inflation could accelerate into year-end, adding to the strain on household budgets.

If the Strait of Hormuz reopens and the standoff eases, diesel prices could retreat as supply normalizes. If not, elevated fuel costs could persist through the harvest and holiday shipping seasons, keeping inflation and its political fallout front and center.

This article is for informational purposes only and does not constitute investment advice.