What will inflation be in December 2026?

Currently, the collective prediction of traders in this market suggests a different outlook than many traditional analyst forecasts. While many economists predicted a swift return to the Federal Reserve’s 2% target, this market reflects a degree of uncertainty regarding that timeline. It’s important to note that prediction markets represent a ‘wisdom of the crowd’ approach, incorporating diverse perspectives and reacting to new information as it emerges, while analyst forecasts are often based on specific models and assumptions. The market’s view can evolve rapidly as new economic data is released.

On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing different CPI YoY rates for December 2026. The price of each contract reflects the market’s assessment of the probability of that specific rate occurring. As more traders participate, the prices adjust to reflect the collective intelligence of the crowd. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price movements are driven by supply and demand; if more people believe inflation will be higher, contracts predicting higher rates will become more expensive, and vice versa.

This market resolves around Jan 13, 2027, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the resolution will be based on the official Consumer Price Index (CPI) for December 2026, as released by the Bureau of Labor Statistics (BLS). The market will determine whether the year-over-year CPI inflation rate exceeds or falls below the levels specified in the different contract options available. Traders will then be paid out based on whether their predictions align with the official CPI data.

Several key signals and events could significantly impact this market. Major economic reports, such as monthly CPI and employment data, will be closely watched by traders. Unexpected shifts in monetary policy by the Federal Reserve, like interest rate changes or quantitative easing adjustments, could also cause substantial price movements. Geopolitical events, supply chain disruptions, and significant changes in energy prices are additional factors that could influence inflation expectations and, consequently, the prices in this market. Any news that alters the perceived trajectory of the US economy has the potential to move the market.