Inflation Peaked at 9.1 Percent and the Composition Told the Real Story
The June consumer price report showed the fastest annual increase in roughly four decades. Underneath the headline, the drivers had shifted in a way that shaped policy for the next two years.
The Peak
The consumer price index reading covering June 2022, released in mid July, showed headline inflation at roughly 9.1 percent year over year, the highest in about forty years. It marked the cycle peak, though nobody could know that at the time, and the path down proved far slower than the path up.
Headline Versus Core
Two measures get quoted constantly and they answer different questions. Headline inflation includes everything a household buys. Core inflation excludes food and energy.
Excluding food and energy sounds absurd, since those are the prices people notice most. The justification is statistical rather than dismissive. Energy and food prices are volatile and driven substantially by global supply conditions that monetary policy cannot influence. A central bank raising rates cannot produce more oil. Core inflation is meant to isolate the component that reflects domestic demand, which is what policy can actually address.
In June 2022 the gap between the two was wide, because energy was contributing heavily following the commodity shock. That made the headline number the most alarming and the core number the more policy relevant.
Headline inflation tells you what households are experiencing. Core inflation tells you what the central bank can do something about. Both matter and they are not interchangeable.
The Shelter Problem
The component that mattered most for the following two years was shelter, which carries the largest single weight in the index. It is also measured in a way that surprises most people.
The index does not use home prices. It uses rents, including an estimate called owners equivalent rent, which asks what a homeowner would pay to rent their own home. Because leases typically run twelve months and the survey samples gradually, this component reflects market rents with a lag of roughly a year.
That lag cuts both ways. Shelter inflation was still rising through 2022 based on market rent increases from 2021, and it kept the index elevated well after market rents had cooled. Anyone reading the data literally in late 2022 saw persistent shelter inflation. Anyone reading the lag structure understood a mechanical decline was already in the pipeline.
Goods Versus Services
The other useful split is between goods and services. Goods inflation had been driven by supply chains and the pandemic demand shift, and it faded as those normalized, in some categories turning negative as retailers cleared excess inventory.
Services inflation is different. Services are labor intensive, so services prices track wages, and wages respond to labor market tightness rather than to shipping rates. That is why officials paid close attention to services excluding shelter as the measure most connected to the labor market, and why the last stretch of disinflation was the slowest.
Why the Peak Was Not the End
Reaching a peak means the rate of increase stopped accelerating. It does not mean prices fell. Inflation returning from 9 percent to 3 percent still means prices rose 3 percent on top of the increases already absorbed. The price level does not revert.
That distinction explains much of the gap between improving economic data and persistent public frustration in the years that followed. Economists were describing the derivative. Households were experiencing the level.
The Bottom Line
Inflation peaked at 9.1 percent on the back of energy, but the durable problem was shelter and services, which move on lags and wages. Reading the composition rather than the headline is what made the following two years predictable.