Consumer prices continued their surge in May, with the latest CPI report showing inflation soared to 4.2%. This is the highest level that inflation has been seen at since 2023, according to the Bureau of Labor Statistics.

The index for energy prices alone accounted for more than 60% of the increase from April, with prices rising 3.9%. Food prices rose 0.2% in May from the previous month as cheese prices fell and coffee continued its march higher. Auto insurance prices declined 1.7% from April’s levels, while the cost of hospital services rose 0.7%.

“Today’s CPI data confirmed our expectation that higher energy costs and their ripple effects on the costs of transportation and food would drive May headline CPI higher,” Moody’s Ratings chief credit officer Atsi Sheth said in a statement. “We expect energy prices to remain a driver of headline inflation until there is greater geopolitical certainty in the Middle East.”

The inflation surge can be credited to many factors for its rise; one of the biggest factors is the ongoing US-Iran war. Since February 2026, inflation has climbed 2.4 percent. The conflict in the Middle East has impacted energy markets, with a fifth of the world’s oil supply effectively frozen in the Strait of Hormuz. Leading indexes, including the S&P 500 and Dow Jones, also fell slightly after the latest inflation data was released.

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Furthermore, the latest jump in U.S. inflation keeps pressure on the Federal Reserve to hold interest rates steady for the foreseeable future. Officials are weighing the risk that price pressures stemming from the war in Iran will broaden to other sectors. The Fed continues to track inflation as the leading decider on whether to cut rates. Now under new leadership, the central bank is expected to begin cutting rates again soon; however, the latest inflation report could present a red flag.