September CPI's unrounded numbers show inflation running hotter than reported

As seen on the 24/7 Wall St. homepage on October 14, 2026.

The rounding hid it: core inflation accelerated to 2.564% annually, which makes the market's Fed-cut math a lot harder to defend.

U.S. INFLATION RUNS HOTTER THAN HEADLINE NUMBERS SUGGEST Unrounded September CPI rose 0.649% MoM, beating the 0.58% forecast, while core CPI climbed 0.335% vs. 0.21% expected. Annual inflation reached 3.738%, with core CPI accelerating to 2.564% from 2.446%. Both headline and
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September's headline CPI ran at 0.649% month over month on an unrounded basis, missing expectations of 0.58%.

On an annual basis, core CPI accelerated to 2.564%, a move in the wrong direction for anyone expecting the Federal Reserve to ease policy in the near term.

Conventional rounding compressed numbers that, left intact, present a meaningfully different inflation picture than the figures traders initially saw.

For markets pricing in Fed rate cuts, core CPI accelerating to 2.564% annually is a direct challenge to that positioning. The Fed's path narrows the longer underlying price pressures hold above the prior month's pace.