The core PCE data has just been released, and the inflation rate for December reached 2.9%, up slightly from the previous month's 2.8%. This indicator is called the Personal Consumption Expenditures Price Index, simply reflecting the changes in prices of everyday goods and services consumed by Americans.

The reason why core PCE is important is because the Federal Reserve's FOMC considers it a primary reference for judging inflation. The Bureau of Economic Analysis started compiling this data early on, and it was officially incorporated into the Federal Reserve's decision-making framework in 2002. Compared to other inflation indicators, it better represents the actual cost changes of private consumption.

From this perspective, the rise in core PCE indicates increasing purchasing power pressure among American consumers. How the Federal Reserve will adjust its policies moving forward will still depend on the continued performance of such data.