#USCorePCEMay This is a label or hashtag that refers to the Core Personal Consumption Expenditures (PCE) Price Index for the United States for the month of May.

The Core PCE is a key measure of inflation that the Federal Reserve (the central bank of the U.S.) closely monitors to make decisions about interest rates and monetary policy. It is "core" because it excludes the volatile components of energy and food, which provides a clearer picture of underlying inflationary pressures.

When you see "#USCorePCEMay" on social media, especially in the financial or cryptocurrency context, it means that the Core PCE inflation data for May is being discussed or reported, and how this data may impact financial markets.