Iran war inflation spreads beyond energy, pushing US inflation to 4.2%
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The inflationary fallout from the Iran war has spread beyond energy, hitting food, housing, and consumer goods. U.S. inflation reached 4.2% in May, a three-year high, even as crude oil prices later eased amid peace talks.
The Supply Shock
Following the start of U.S. military operations against Iran in late February 2026, Iran shut the Strait of Hormuz to most commercial vessels. This halted the flow of approximately 20 million barrels of petroleum liquids per day, about one-fifth of global demand. Crude oil prices surged over 70% within weeks, driving U.S. gasoline prices up by $1.56 per gallon for regular, $1.85 for premium, and $1.81 for diesel by early May, according to AAA.
Broadening Inflation
The energy shock quickly rippled into other sectors. U.S. trailing 12-month inflation rose from 2.4% in February to 4.2% in May, outpacing the Federal Reserve's 2% target. Transportation costs fed into higher food and consumer goods prices, while housing costs also climbed. Although crude prices retreated somewhat after May, fuel prices remained elevated, exhibiting a pattern where prices rise like a rocket and fall like a feather.
What's Next
Tentative peace talks between the U.S. and Iran are underway, but no deal has been reached. Even if the Strait reopens, analysts caution that fuel prices may decline slowly, and the broader inflationary pressure could persist, complicating Federal Reserve decisions and weighing on President Trump's economic platform.
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Iran war inflation spreads beyond energy, pushing US inflation to 4.2%
