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Headline vs core inflation

Two numbers, one report

Every month the Bureau of Labor Statistics publishes the Consumer Price Index. The headline number, "all items," tracks the whole basket: rent, groceries, gas, car insurance, haircuts. Core is the same basket with food and energy taken out.

How the gap works (example numbers, not real data): say headline inflation comes in at 4.0% for the year and core at 3.0%. That one-point gap comes from the things core leaves out. If gas prices jumped that year, they pull headline up while core never sees them.

Why leave out food and energy?

Food and energy prices swing hard with weather, wars and supply shocks, and they can reverse just as fast. Core strips out that noise to show the slower trend in everything else. That's why economists and the Fed watch it closely.

The two numbers answer different questions. Core asks whether inflation is spreading through the economy. Headline asks how much more your life costs.

Which one do you feel?

You feel headline. You can't skip buying gas because it's left out of core.

When headline runs well above core, energy or food is usually the reason. When core starts climbing too, higher prices are spreading into rents, services and goods.

Where the Fed fits

The Fed's 2% inflation target is measured with a different index, the PCE price index from the Bureau of Economic Analysis. It comes in headline and core versions too, and the Fed leans on core to judge the trend.

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Future Macro is education, not financial advice.