April’s consumer price index jumped to 3.8% year‑over‑year, the fastest rise since May 2023, as energy costs surged amid the Middle‑East conflict. The Labor Department said the uptick followed a 2.4% gain before February’s war and a 3.3% increase in March. Higher gasoline, now above $4.50 a gallon, pushed transportation and food prices higher.

Energy accounts for most of the rise, with monthly oil prices climbing 3.8% and diesel nearly doubling. Strains on the Strait of Hormuz have throttled commodity flows, replacing tariff‑driven inflation that faded after President Trump’s trade measures were rolled back. Even the “core” CPI, which strips food and energy, edged up to 2.8% year‑over‑year.

Rising shelter costs added pressure, with rents and owners’ equivalent rent climbing 3.3% annually. Executives surveyed by the Cleveland Fed now anticipate 3.7% inflation over the next year, the highest since last April, tightening expectations for Federal Reserve rate cuts. The hotter CPI reading weakens the case for easing monetary policy this cycle.

Investors responded with a sell‑off in rate‑sensitive sectors; Treasury yields rose as traders priced in a longer‑run tightening path. Commodity‑heavy stocks also felt pressure, reflecting concerns that supply disruptions could linger. Analysts warn that persistent energy‑driven inflation may erode corporate profit margins unless the Fed signals a decisive policy shift in the near term soon.