Guide · Basics

The Producer Price Index: What Wholesale Inflation Says Before It Reaches You

Published a day after CPI, the producer price index measures what businesses charge each other. Here is how to read it, why "core" PPI strips out trade margins, and what a 1.3% monthly jump in September 2026 did — and did not — mean.

Oct 16, 2026

The consumer price index measures what households pay. The producer price index (PPI) measures what domestic producers receive for their goods and services, one step earlier in the chain. It is published by the Bureau of Labor Statistics the morning after CPI, which is why the two tend to be read together.

The headline number is the index for final demand: goods and services sold for personal consumption, capital investment, government and export. Within it, the BLS reports prices for final-demand goods and final-demand services separately, and a 'core' version that excludes food, energy and trade services. Trade services are the margins earned by wholesalers and retailers, which swing with inventories and discounting rather than with underlying costs; removing them, along with fuel and food, leaves the measure most analysts and the Federal Reserve watch.

September 2026 showed why the distinction matters. Final-demand prices rose 1.3% in the month, the largest increase since March 2022, and 6.3% over twelve months, against forecasts of 0.6% and 5.5%. But final-demand energy rose 10.8% and gasoline 20.3%, while the core measure rose 0.5% in the month and 5.0% over the year. Goods prices rose 2.6%, services 0.8%. The 10-year Treasury yield fell to 5.09% that day — markets treated the headline as a fuel story, not an inflation regime change.

PPI is often described as a leading indicator for CPI, and in a narrow sense it is: when producers' costs rise, some of the increase reaches shelves in later months. But the link is loose. Producers absorb part of cost increases in their margins, and much of CPI — shelter, most services — has no wholesale equivalent. Several components of PPI, such as airfares, healthcare services and portfolio management fees, feed directly into the Fed's preferred PCE price index, which is the better reason to pay attention to the details.

For traders, three things in each report are worth checking: the core measure against its forecast, the split between goods and services, and the energy line. A hot headline driven by goods and energy, with services and core in line, usually produces a brief reaction; a surprise in core services is what moves rate expectations for more than a day.

One last habit: look at the revisions. The BLS revises the previous four months with each release. In October 2026 August's increase was shown as 0.5%, and the picture of the summer changed slightly as a result.