Core inflation is a measure of inflation that excludes volatile food and energy prices to provide a more stable view of underlying price trends. This metric helps central bankers and economists assess the persistent component of inflation by removing temporary price fluctuations that can distort the overall inflation picture.

Core inflation data is closely watched by the Federal Reserve and other central banks when making monetary policy decisions. Food and energy prices can be highly volatile due to weather, geopolitical events, and seasonal factors, making core inflation a better indicator of monetary policy effectiveness. Traders monitor core inflation releases as they often have greater impact on interest rate expectations than headline inflation figures.

Real-world example: While headline inflation reaches 6% due to rising gas prices, core inflation remains at 3%, suggesting underlying price pressures are more moderate and less likely to prompt aggressive Fed action.