What's the opposite of inflation? Deflation, and that's exactly what happened in December, according to the latest consumer price index (CPI). Prices fell 0.1 percent last month, bringing the year-over-year rate to 6.5 percent, down from a peak of 9.1 percent last June. 

Here are the highlights: 

Energy contributed the biggest share to the decline, with prices falling 4.5 percent. Under that category, fuel oil saw the biggest drop, falling 16.6 percent. 

After energy, automobiles saw the most deflation in December. The price of new vehicles fell 0.1 percent, and the price of used vehicles fell 2.5 percent. 

Food prices, meanwhile, ticked up 0.3 percent. That's the smallest increase in the last six months. Shelter costs also jumped a sizable 0.8 percent, up from 0.6 percent in November. 

The report comes as a debate rages over whether the U.S. economy can achieve a so-called landing after several large rate hikes from the Federal Reserve. While the central bank has signaled moderation, any shift in the inflation narrative could change its tone.

Markets expected and had priced in the CPI drop, however, so it's possible stocks won't move drastically in response to the data. Futures rose slightly after the release. 

Share:
More In Business
Federal Reserve: Inflation Is, Uh, Still Up
An inflation gauge favored by the Federal Reserve increased in January, the latest sign that the slowdown in U.S. consumer price increases is occurring unevenly from month to month. (Getty Images)
Is 2024 the Most Affordable Year to Buy a New Car?
After years of price increases for cars and trucks in the United States, costs are slowing and in some cases falling, helping cool overall inflation and giving frustrated Americans more hope of finding an affordable vehicle.
Load More