Inflation is proving stickier than expected, which could cause Fed to hit pause button on more interest rate cuts.

Consumer Price Index showed an acceleration to 2.9%, the highest rate since July. With such high inflation, the Fed is unlikely to cut rates in January.

Annual inflation ticked up for a third straight month in December as food, energy costs rose, CPI report showed. But underlying price measure eased.

The Consumer Price Index rose 2.9 percent from a year earlier, but a measure of underlying inflation was more encouraging.

U.S. inflation picked up last month as prices rose for gas, eggs, and used cars, yet underlying price pressures also showed signs of easing a bit. Wednesday’s report from the Labor Department showed that the consumer price index rose 2.