The index increased by 0.4% in December 2024 on a seasonally adjusted basis compared to a 0.3% increase in November 2024. CPI-U Formula The more common CPI-U calculation entails two primary formulas.

Because the PCE and CPI differ in their formula, weighting, scope and other effects, their results are different. The Federal Reserve prefers to use the PCE price index to measure inflation.

If you receive Social Security benefits, your payments are getting bigger this year. That’s because you’re getting a Cost of ...