US Inflation Surges in September, Raising Fed Rate Hike Bets

U.S. inflation accelerated in September, fueling expectations that the Federal Reserve could raise interest rates later this month as Wall Street reacted to stronger-than-expected consumer price pressures.

Data released Wednesday by the Bureau of Labor Statistics showed the headline Consumer Price Index (CPI) increased 0.6% month-over-month, matching economists’ forecasts but exceeding August’s 0.4% rise. Core CPI, which excludes volatile food and energy prices, climbed 0.3%, above the anticipated 0.2%.

On an annual basis, headline inflation reached 3.7%, surpassing the 3.6% forecast and August’s 3.4% reading. Core inflation increased to 2.6%, exceeding expectations of 2.5% and accelerating from 2.4% the previous month.

The hotter U.S. CPI report revived speculation about an October Federal Reserve rate hike. According to CME FedWatch data, traders increased the probability of a 25-basis-point increase to approximately 39%, compared with nearly 22% before the inflation figures were released.

Financial markets responded negatively as Wall Street futures declined and Treasury yields advanced. The S&P 500 dropped approximately 1%, while the benchmark 10-year U.S. Treasury yield climbed 3.1 basis points to 5.248%.

Economists offered mixed assessments of the inflation outlook and potential monetary policy response.

Jeffrey Roach, chief economist at LPL Financial, warned that inflation pressures were spreading beyond energy, potentially complicating the Fed’s efforts to restore price stability.

Charlie Ripley of Allianz Investment Management offered a more cautious interpretation, noting that gasoline prices contributed significantly to headline inflation. He highlighted unexpected increases in shelter costs, airfares and used vehicles as key drivers of core inflation.

Ripley estimated that shelter costs alone contributed roughly 0.15 percentage points to September’s core CPI increase but cautioned against assuming the acceleration would persist.

Meanwhile, Joseph Brusuelas, chief economist at RSM US, projected another quarter-point Fed rate hike before year-end. He identified trade disruptions, energy pressures and artificial intelligence-related demand as major inflationary forces.

Jamie Cox of Harris Financial and Ross Gerber of Gerber Kawasaki also emphasized the impact of geopolitical conflicts and rising energy costs.

The latest inflation figures leave the Federal Reserve facing a difficult policy decision as persistent price pressures, elevated Treasury yields and uncertainty surrounding energy supplies challenge the outlook for U.S. interest rates.