US Inflation Rebounds as Energy Costs Surge

US inflation rose to 3.7% in the year to September, up from 3.4% in August and higher than economists expected. The article attributes most of the increase to rising energy costs, especially petrol, following disruption to Middle Eastern energy supplies amid the US-Israel conflict with Iran. Vehicle fuel prices rose 34.2% over the year and 9.1% in September alone; energy inflation overall reached 20.4%, while fuel oil prices increased 74.2%. Food inflation was comparatively subdued at 2.5% year over year, and core inflation—which excludes food and energy—was 2.6%. The Federal Reserve will monitor whether energy costs spill over into other parts of the economy.

U.S. consumer prices rose faster than expected in September, with the Consumer Price Index increasing 0.6% for the month and 3.7% from a year earlier, according to the Bureau of Labor Statistics. Economists had expected annual inflation of 3.6%. Core CPI, which excludes food and energy, rose 0.3% monthly and 2.6% annually, also exceeding forecasts. Both headline and core inflation accelerated from their August readings. Energy costs were the largest contributor: the energy index rose 5.2%, gasoline prices jumped 9.1%, and gasoline accounted for about half of the monthly increase in headline CPI. Gasoline was up 34.2% over the year and fuel oil 74.2%. Yet price increases were not limited to energy. Shelter costs rose 0.4%, used vehicles 0.7%, and apparel 0.3%; food prices were unchanged for the month. The report unsettled financial markets. Stock futures turned lower, bond yields rose, and traders increased their expectations of Federal Reserve rate hikes, including at the end of the year. The release is the final CPI report available to Fed officials before their Oct. 27–28 meeting. The BLS was due to publish September producer-price data the following day, while the September personal consumption expenditures index—the Fed’s primary inflation measure—was expected later in the month. The article links renewed inflation pressures to the war involving the U.S., Israel and Iran, which has driven energy costs higher, as well as President Donald Trump’s tariffs and demand tied to the artificial-intelligence build-out. Although energy-related supply shocks can be temporary, policymakers are concerned that prolonged high prices could spread through the economy and influence inflation expectations. CPI inflation has remained above the Fed’s 2% target since March 2021. The Fed raised its benchmark rate by a quarter point in September, to a range of 3.75%–4%; markets expected a pause in October but further increases later, with some pricing implying additional hikes in 2027.

U.S. Treasury yields climbed Wednesday after September inflation came in hotter than economists expected, raising concerns that the Federal Reserve may need to keep interest rates higher for longer. The 10-year Treasury yield rose more than seven basis points to 5.289%, its highest level since October 8. The 30-year yield increased more than three basis points to 5.602%, while the rate-sensitive 2-year yield gained more than 10 basis points to 4.895%, reaching its highest level since September 29. Treasury yields and prices move in opposite directions; one basis point is 0.01 percentage point. The consumer price index rose 3.7% from a year earlier, above the Dow Jones consensus estimate of 3.6%. Core CPI, which excludes food and energy, was 2.6%, also exceeding the 2.5% estimate. With the Fed’s next rate decision approaching in two weeks, the report intensified expectations of further monetary tightening. Fwdbonds chief economist Christopher Rupkey said persistent inflation could lead the central bank to raise rates and keep them elevated into 2027, describing the inflation report as a shock to bond investors. Futures-market pricing reflected the shift. The perceived chance of a quarter-point rate hike at the October 28 meeting rose to 43.7%, from 22.1% the previous day. Markets also priced in a greater than 95% probability of at least one rate increase before year-end, including a 40% chance of a half-percentage-point increase—twice the odds a day earlier. Investors were also awaiting September producer-price data, September retail sales, and weekly initial jobless claims, all scheduled for Thursday.

US inflation rose faster than expected in September, with the Consumer Price Index increasing 3.7% from a year earlier, compared with 3.4% in August. Monthly inflation accelerated to 0.6% from 0.4%. Core inflation, which excludes food and energy, also picked up annually to 2.6%, while its monthly rate held at 0.3%. Economists surveyed by FactSet had expected an annual rate of 3.6%. The article attributes much of the renewed pressure to higher fuel costs linked to the Iran war, alongside increases in clothing and airfares. Petrol prices rose about 9% from August to September, while airfares were about 23% higher than a year earlier. Higher fuel costs may also raise businesses’ shipping expenses, which can be passed on to consumers; PepsiCo, for example, said it would increase prices on some products to offset higher input costs. The figures complicate the Federal Reserve’s effort to return inflation to its 2% target. The Fed raised rates in September for the first time in three years, to a range of 3.75%–4%, and faces another rate decision at its 27–28 October meeting. Higher borrowing costs can dampen spending and help restrain inflation, but cannot directly resolve supply disruptions. The data also had immediate market effects: US stock indices turned negative, precious metals fell, and Treasury yields rose as traders increased expectations of further rate hikes. Analysts warned that persistent inflation could push government borrowing costs higher. Politically, the report comes weeks before the US midterm elections and adds pressure on Republicans. An AP-NORC poll found low approval of President Donald Trump’s handling of both living costs and the economy.