Editor’s note: This article was updated to add more details and context.
Price pressures intensified further in May as the Strait of Hormuz energy shock continued to feed through the Consumer Price Index basket, reinforcing the case for Federal Reserve’s interest rate hike in 2026.
The headline inflation rate climbed from 3.8% year-over-year in April to 4.2% in May, matching economist expectations. That is the hottest reading since April 2023 and pushing the measure further away from the Fed’s 2% target.
On a monthly basis, prices rose 0.5%, matching the 0.5% consensus after April’s 0.6% print.
Stripping out food and energy, core inflation rose from 2.8% to 2.9%, also matching forecasts. Underlying month-over-month pressures rose 0.2%, decelerating from the prior 0.4% against a 0.3% consensus.
The May print follows April’s 3.8% reading and 6.0% surge in producer prices, marking the third consecutive uncomfortable inflation print for the Federal Reserve under new Chair Kevin Warsh.
Where Did Inflation Rise The Most In May?
Energy was once again the dominant driver, accounting for over 60% of the monthly all-items increase.
The energy index rose 3.9% on the month and is now up a staggering 23.5% year-over-year — the highest annual reading since the 2022 inflation cycle.
Within energy, gasoline prices surged 7.0% in May after a 5.4% jump in April, lifting the annual rate to 40.5%, while fuel oil prices are now running 58.9% above year-ago levels.
The energy commodities aggregate is up 40.6% year-over-year.
Outside energy, several services categories also showed renewed strength.
The communication index jumped 1.3% on the month after falling 0.2% in April, with wireless telephone services up 2.2%. Airline fares climbed 2.7% in May, extending a powerful run that has lifted the index 26.7% year-over-year.
Personal care prices rose 1.0%, while postage and delivery services jumped 5.2%, lifting the annual rate to 14.7%.
Categories with the strongest monthly price increases (May vs. April)
| Category | MoM Change |
|---|---|
| Gasoline (all types) | +7.0% |
| Energy commodities | +6.7% |
| Airline fares | +2.7% |
| Communication services | +1.3% |
| Personal care | +1.0% |
| Medical care services | +0.5% |
| Shelter | +0.3% |
| Recreation | +0.3% |
| Food away from home | +0.3% |
Among single goods and services with the steepest monthly seasonally adjusted increases, the standouts were lettuce (+16.4%), tax return preparation and accounting fees (+11.8%), tobacco and cigarettes (+1.0% to +1.2%), and jewelry (+2.9%).
Shelter rose 0.3% on the month and 3.4% year-over-year, with rent of primary residence up 0.4%.
Conversely, several core categories offered offsets.
Motor vehicle insurance dropped 1.7% on the month, the steepest decline in over a year, and is now running 2.0% below year-ago levels. Household furnishings and operations fell 0.6%, and the new vehicles index declined 0.3%.
Tomatoes also reversed sharply, falling 6.1% after April’s 15.1% surge, while dairy prices dropped 0.6% as cheese collapsed 2.9% on the month.
The split is significant: the headline acceleration was almost entirely an energy story, while the core measure was kept in check by weakness in motor vehicle insurance, furnishings, and new vehicles.
Market Reaction
The market reacted with a notable risk-on tone amid the cooler core print.
Equity futures held losses but pared their worst premarket levels: S&P 500 futures slipped 0.22% to 7,365, Nasdaq 100 futures dropped 0.20% to 28,910, while Dow futures fell 0.23% to 50,737.
On Wednesday, the S&P 500 – tracked by the SPDR S&P 500 ETF Trust (NYSE:SPY) – closed 0.3% lower.
The Treasury market told a similar story. The 2-year yield, the maturity most sensitive to Fed expectations, fell 2 basis points to 4.11%, with the move accelerating in the minutes after the release as the cooler core print led traders to pare some of the most aggressive hike pricing.
The U.S. Dollar Index slipped 0.11% to 99.54, while spot gold dropped 0.50% to $4,158 per troy ounce and WTI crude oil slid 0.17% to $88.92 per barrel.
The market’s measured reaction came against a sharply escalating geopolitical backdrop.
President Donald Trump warned on Truth Social Wednesday morning that Tehran has “taken too long to negotiate a deal” — adding that “now they will have to pay the price.”
Separately, Fox News reported that Trump told the network he is close to ordering new strikes against Iranian power plants and bridges, signaling a potential second wave of U.S. military escalation against the regime.
Image: Shutterstock
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