4.2 percent. U.S. consumer prices rose by that amount in May, the fastest annual pace in three years, the Bureau of Labor Statistics said. Households bore most of the squeeze, with petrol and broader household energy bills doing much of the heavy lifting while core inflation, which strips out food and energy, rose 2.9 percent. That energy-driven jump makes the Federal Reserve's ability to cut interest rates and has become a political vulnerability for President Donald Trump as the U.S.-Israel war with Iran keeps oil benchmarks elevated.

4.2 percent. The headline number understates where the pressure landed: energy and transport costs were the dominant contributors to the monthly rise, the BLS report shows.

Energy and transport drove the increase

The Bureau of Labor Statistics said the 4.2 percent annual pace in May was up from 3.8 percent in April and marked the third consecutive monthly increase. Energy costs were the main driver of the monthly jump, and motoring groups reported a marked rise in pump prices since late winter. Overall household energy bills and transport costs were much higher year on year, and airline fares have risen sharply.

Stripping out volatile food and energy, core consumer price inflation increased 2.9 percent year on year. That divergence, where headline inflation is pushed up by commodity-linked items while core inflation remains more moderate, will make the Fed's deliberations. A rise in energy costs hits household disposable income directly, leaving less to spend on other items and slowing real consumption.

Politics and policy fallout

President Donald Trump told reporters at the White House, "I love the inflation," and said he expected prices to "come down like a rock" once the war with Iran ends. He linked recent operations around the Strait of Hormuz and alleged seizures of oil and ships to a softening in oil prices, and said he approved secret measures to move tankers through the waterway.

Mastheads

Analysts and politicians warned that higher inflation could keep the Federal Reserve from cutting rates this year, even as headline inflation remains well below the 9.1 percent peak recorded in 2022. That choice will be consequential.

If the Fed pushes back on planned cuts it will raise borrowing costs relative to current market expectations, with knock-on effects for mortgages, corporate financing and the housing market.

For Mr Trump and his party the timing is awkward. Commentators noted that inflation has become a political weakness for the president, whose approval ratings on the cost of living have dropped to the lowest levels of his political career. Higher petrol prices and elevated household energy bills are politically salient because they affect everyday budgets and travel plans, ordinary expenses that register at the ballot box.

The wider conflict is the lens through which many industry analysts read the figures. The US-Israel war with Iran has disrupted shipping through the Strait of Hormuz and lifted global oil benchmarks above pre-war levels, keeping energy prices elevated and contributing to higher costs for petrol, fertiliser and other goods. Even if diplomatic or military developments ease the immediate disruption, industry analysts say it's likely to take months to return supplies to pre-conflict flows, prolonging upward pressure on prices through 2026.

Policy makers will be eyeing the data for signs of persistence. A single monthly blip driven by energy would be easier for the Fed to tolerate; a series of months with elevated headline inflation, especially if accompanied by firming core inflation, will make rate cuts harder to justify.

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Policymakers will be watching the next monthly inflation prints for signs of persistence; a sustained run of elevated headline readings would make Federal Reserve rate cuts much harder to justify.

This article was created with AI assistance.