CPI is back near 2.5%, but is the Fed satisfied?

Headline CPI is the most-cited inflation number in financial press, but the Federal Reserve's formal 2% inflation target is tied to Core PCE, the personal consumption expenditures price index excluding food and energy. The gap matters, even when both look low.

Why the Fed reads Core PCE, not CPI

Core PCE typically runs 30-50 bps below headline CPI for two structural reasons:

• Methodology. PCE's consumption-weighted basket updates more frequently than CPI's fixed basket, so it captures substitution effects (people switching from beef to chicken when beef prices spike) that CPI misses.
• Composition. Core PCE excludes the volatile food + energy components by definition. Headline CPI includes them, which makes the number more sensitive to oil price shocks but less useful as a gauge of underlying price pressure.

The practical takeaway

For investors and analysts, watch both:

• Headline CPI drives the public narrative response: what newspapers call "the inflation rate," what voters react to, what the BLS report leads with.
• Core PCE drives the FOMC reaction function: what determines whether and when the Fed cuts or holds.