The consumer price index increased by 2.9 percent in December from a year earlier, the Labor Department reported Wednesday, in line with economists’ expectations and hotter than a 2.7 percent rise in November. It was also above a 2.6 percent annual increase in October.

U.S. inflation accelerated last month as prices for gas, eggs, and used cars rose, yet underlying price pressures also showed signs of easing, bolstering hopes that the Federal Reserve could still cut its key interest rate this year.