Inflation odds move toward 100% on Polymarket as traders brace for Fed rate hikes

Polymarket traders have priced the probability of US inflation staying above 3% in 2026 at effectively 100%. April 2026 CPI came in at 3.8% year-over-year, a three-year high driven largely by surging energy costs tied to geopolitical tensions. The Federal Reserve’s 2% target suddenly looks less like a destination and more like a distant memory. The numbers behind the near-certainty Polymarket’s inflation contracts tell a layered story. While the “above 3%” band is essentially maxed out, higher thresholds paint a more nuanced picture. Odds for inflation exceeding 4% sit around 59%, meaning traders think there’s a better-than-coin-flip chance we get there. The “above 5%” band ranges between 13% and 28%. Fed Governor Michael Barr has warned that rate hikes are on the table if inflation doesn’t start trending back toward 2% by September 2026. As of early September 2026, traders assessed a 71-72% probability that at least one rate hike would occur during the year. Odds specifically for a hike at the September 2026 meeting fluctuated between 38% and 57%, swinging with each new data release. Why prediction markets are leading the conversation Prediction markets like Polymarket and Kalshi ...