CPI vs. PPI

Back to Basics: CPI vs. PPI When looking at inflation, two key terms often come up: CPI and PPI . Both measure how prices change over time, but they focus on different parts of the economy. CPI , or Consumer Price Index , tracks the average change in prices that consumers pay for everyday goods and services—things like groceries, rent, transportation, and clothing. In short, CPI tells us how much more (or less) it costs to live. PPI , or Producer Price Index , measures the average change in prices that producers receive for their goods. This includes raw materials, parts, and wholesale goods—basically, what businesses pay before products reach store shelves. Here’s a simple example: Imagine the cost of wheat rises. That shows up first in the PPI, since it affects what bakeries pay to make bread. If those costs stay high, the bakery might raise its prices, which eventually increases the CPI when customers buy bread at the store. It’s a common mistake to assume CPI and PPI a...