Trader consensus on Polymarket has locked in a 100% implied probability for March 2026 US annual CPI inflation at exactly 3.3%, confirmed by the Bureau of Labor Statistics release on April 10 showing a year-over-year rise to 3.3% from February's 2.4%, the sharpest monthly jump since 2022. This surge stems from a 10.9% energy index increase—led by 21.2% gasoline gains amid escalating Iran-related geopolitical tensions boosting oil prices—aligning with pre-release economist forecasts around 3.3%. Core CPI also accelerated, reinforcing sticky inflation pressures. While BLS data carries high finality, rare methodological revisions or data corrections could theoretically challenge resolution, though historical precedent suggests minimal risk ahead of the next April report on May 12.