https://www.stlouisfed.org/on-the-economy/2024/may/measuring-inflation-headline… Created Fri, 03/05/2024 - 19:30 Updated Fri, 03/05/2024 - 19:30 Inflation measures like CPI and PCEPI and their variations of headline, core and supercore differ in the prices they cover and in the weighting of price categories.