CPI vs. PCE: Two Key Signals That Guide the Fed

The US relies on two major inflation measures: CPI and PCE. While both track changes in prices, they capture slightly different parts of the economy. CPI focuses more on what households directly pay, while PCE includes a broader range of goods and services, making it the Fed’s preferred gauge.
When both indicators point in the same direction  whether rising or falling it often strengthens the case for adjusting interest rates. But when they diverge, it can create uncertainty and mixed signals for policymakers.
For example, if CPI shows strong inflation but PCE rises only modestly, the Fed may be more cautious in tightening policy. On the other hand, if both jump sharply, it can increase pressure for the Fed to act quickly.
This is why markets react strongly each time new CPI or PCE numbers are released. These indicators shape the Fed’s confidence, guide expectations, and influence financial conditions across the board.