Inflation Jumps to 3.7% in September, Keeping Pressure on the Fed to Raise Rates Again

Inflation accelerated more than expected in September, with consumer prices up 3.7% from a year earlier, the Bureau of Labor Statistics reported Wednesday — the hottest annual reading since the Federal Reserve resumed raising interest rates last month, and a print that raises the odds the central bank hikes again rather than pauses at its meeting later this month.

What happened

The Consumer Price Index rose 0.6% in September from August, the BLS said, after a 0.4% increase the prior month, pushing the year-over-year rate to 3.7% from 3.4% in August and above the roughly 3.6% economists had expected. The core index, which strips out volatile food and energy prices and is watched closely by the Fed as a gauge of underlying inflation, rose 0.3% for the month and 2.6% over the year — also hotter than forecast. Gasoline prices jumped 9.1% in September alone, which the bureau said accounted for more than half of the month's overall increase, and are up 34.2% over the past year. Shelter costs, the single largest category in the index, rose 0.4% for the month and 3.2% over the year.

The numbers

Energy prices overall climbed 5.2% in September and 20.4% over the year. Airline fares rose 1.2% for the month and are up 22.4% year-over-year. Food prices were essentially flat, with the cost of eating out up slightly and grocery prices down slightly. Following the release, the 10-year Treasury yield closed at 5.19%, according to the Treasury Department's daily yield curve data, and the 30-year yield closed at 5.52%, both higher on the day as bond markets priced in a greater chance of continued rate increases. Major stock indexes fell in response, with the S&P 500 down roughly 1% and the Nasdaq Composite down close to 2% as rate-sensitive sectors, including chipmakers and homebuilders, led the declines, according to same-day market coverage. The Dow Jones Industrial Average, which had been up more than 100 points earlier in the session, finished little changed.

The report is the government's last full inflation snapshot before policymakers meet again, and it arrived at a moment when traders had largely expected the Fed to take a breather. Futures markets tied to the Fed's benchmark rate had shown roughly a three-in-four chance of a hold going into Wednesday's release; bond yields' move higher immediately afterward reflected traders marking down those odds and pricing in a greater likelihood of another increase.

How we got here

The report lands just four weeks after the Fed, under Chair Kevin Warsh, raised its benchmark rate a quarter point to a range of 3.75% to 4% on September 16 — its first increase since 2023 and a reversal after a long stretch of holding or cutting rates. In its statement announcing that decision, the Federal Open Market Committee said "inflation remains elevated" and that the move would "support a timelier return to the Committee's 2 percent goal," a statement the committee approved by a unanimous 12-0 vote. Policymakers had signaled at the time that one more increase before year's end was plausible. Wednesday's data makes that scenario more likely: markets had been leaning toward the Fed holding steady at its upcoming meeting before the report, and traders have since been pricing in a greater chance of another hike.

Who's affected

Higher gasoline and shelter costs weigh most heavily on lower- and middle-income households, who spend a larger share of their budgets on both. Homebuilders were among the hardest-hit stocks the day of the release, reflecting investor concern that a Fed still raising rates will keep mortgage costs elevated for longer, compounding a housing market that has already seen borrowing costs climb for seven straight weeks. Rate-sensitive technology and chip stocks also sold off sharply, and the decline extended overseas, with South Korea's stock market falling sharply amid the same rate-hike worries. Savers, by contrast, stand to benefit if the Fed does raise rates again, since yields on savings accounts and short-term Treasury bills tend to track the central bank's benchmark rate upward.

The inflation data also matters beyond markets: the same September CPI figures feed directly into next year's Social Security cost-of-living adjustment and into various federal tax-bracket and benefit calculations, meaning Wednesday's report has consequences for household budgets well beyond the bond market's reaction.

Reaction

"Inflation remains elevated," the Federal Open Market Committee said in the statement explaining its September rate increase — language that now reads as a warning that policymakers may not be finished raising rates.

New York Fed President John Williams said in remarks the day before the report that one more increase before the end of the year remained "appropriate" in his view, while saying he did not currently see a need for further hikes into 2027 — a position that may come under renewed pressure now that both headline and core inflation have come in hotter than forecast for a second straight month.

What happens next

The Fed's next policy meeting is scheduled for October 27-28, and Wednesday's data will be the last major inflation reading policymakers see before they vote. A further rate increase would mark the second of the Fed's current tightening cycle and would likely push mortgage, credit-card and auto-loan rates higher still. The bureau's next Consumer Price Index report, covering October, is due in mid-November, giving the Fed one more month of data before its final scheduled meeting of the year in December. Until then, Wednesday's numbers leave both consumers and investors watching the same question: whether a central bank that just resumed raising rates after a long pause is now closer to the start of a longer tightening run than markets had been expecting.