What will core inflation be in December 2026?

Currently, prediction market odds reflect a different perspective than many traditional analyst forecasts for core inflation. While many economists predict a gradual decline in inflation, this market’s pricing suggests a wider range of potential outcomes. It's important to remember that prediction markets represent the collective wisdom of a diverse group of traders, incorporating information and perspectives that may not be fully captured in standard economic models. Comparing this market to consensus forecasts provides a valuable check on conventional thinking and highlights areas of disagreement.

On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing different core inflation levels, and the price of each contract reflects the probability of that outcome occurring. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price is determined solely by supply and demand; as more traders believe inflation will be higher, the price of contracts representing higher inflation increases. Conversely, if traders anticipate lower inflation, those contracts become cheaper. This dynamic pricing mechanism allows the market to quickly adapt to new information and changing expectations.

This market resolves around Jan 13, 2027, with the outcome confirmed once the official core inflation rate for December 2026 (Core CPI YoY) is verifiable from credible public reporting. The resolution will be based on the year-over-year percentage change in the Consumer Price Index (CPI) excluding food and energy, as reported by the Bureau of Labor Statistics. Traders will then be paid out based on whether their contracts align with the final reported inflation figure. This provides a clear and objective determination of the market’s outcome.

Several key economic signals and events could significantly impact this market. Unexpected shifts in monetary policy by the Federal Reserve, such as interest rate changes or quantitative easing programs, would likely cause price fluctuations. Major geopolitical events, supply chain disruptions, or significant changes in energy prices could also influence inflation expectations and move this market. Additionally, strong or weak economic data releases, particularly those related to employment, wages, and consumer spending, will be closely watched by traders and could lead to substantial shifts in pricing.