Every month, two different government reports claim to measure inflation, and they routinely disagree by half a point or more. This week the Bureau of Economic Analysis releases the one that actually drives Federal Reserve policy, and it is not the one most headlines lead with.

The short answer

The Fed targets the Personal Consumption Expenditures (PCE) price index, not the Consumer Price Index (CPI), because PCE covers a broader slice of spending, updates its basket every month to capture substitution, and is the specific measure the Fed defined its 2% inflation goal around in 2012. The Bureau of Economic Analysis releases July's PCE data on August 26, 2026.

What PCE actually measures

The Personal Consumption Expenditures price index tracks the prices of everything households buy, and a few things bought on their behalf. It comes from the Bureau of Economic Analysis's monthly Personal Income and Outlays report, the same release that reports how much Americans earned and spent that month. "Core PCE" strips out food and energy prices, which swing sharply for reasons that have little to do with underlying inflation, so the Fed watches core PCE more closely than the headline number. In June 2026, core PCE ran at 3.3% year over year, down slightly from 3.4% in May, still well above the Fed's target. The next reading, covering July, arrives August 26.

How PCE differs from CPI, the report you've heard of

CPI gets more headlines because it releases about a month before PCE and comes from the Bureau of Labor Statistics rather than the Commerce Department. The two measure overlapping but different things, and the gap between them comes down to three mechanical choices.

Scope
CPI counts only what households pay out of pocket. PCE also counts spending made on a household's behalf, most notably employer-sponsored health insurance and Medicare and Medicaid spending, which makes healthcare a much bigger slice of the PCE basket than the CPI basket.
Weighting
CPI assigns roughly double the weight to shelter that PCE does. Shelter costs move slowly and lag real-time rent data, so a CPI-heavy view of inflation can stay elevated even after real-time price growth has cooled, one reason the two reports can tell different short-term stories.
Formula and update frequency
CPI uses a fixed basket updated annually. PCE updates its weights every month, so when consumers shift from beef to chicken as beef prices rise, PCE captures that substitution almost immediately, while CPI assumes people keep buying the same basket regardless of price. This is a major reason PCE tends to run cooler.

Why does the Fed use PCE instead of CPI?

The Fed has used PCE as its primary inflation gauge since 2000, and when it formally adopted a numeric inflation target in 2012, the Federal Open Market Committee's statement on longer-run goals defined that 2% target explicitly in terms of PCE, not CPI. The broader scope is the main reason: PCE captures spending across the entire economy, including costs paid by employers and government programs on consumers' behalf, which gives the Fed a fuller picture of the cost pressures actually facing households and businesses. CPI's narrower, urban-consumer-only panel and slower-updating basket make it a useful, more visible check, but PCE is the number written into the Fed's own mandate, so it is the number that actually moves interest rate decisions.

What the latest PCE reading shows, and a genuine reversal

Core PCE has historically run cooler than core CPI. Since 1960, core CPI has registered a higher reading than core PCE in roughly 80% of months, averaging about 0.47 percentage points hotter. That pattern flipped in November 2025: core PCE has been running above core CPI ever since, and as of June 2026 the gap sat at roughly 0.69 percentage points, with core PCE at 3.3% against core CPI at 2.6%. That is not what standard inflation theory would predict, and it is one reason the Fed's rate decisions have leaned more cautious than headline CPI coverage alone would suggest.

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Why this reversal matters: Healthcare costs, which PCE weights far more heavily than CPI, have been a persistent driver of the gap. A single month's reversal would be noise, but seven consecutive months of PCE running hotter is the kind of pattern that shapes how seriously the Fed treats "core" inflation regardless of which report grabs the morning's headline.

How markets react to a PCE report

The mechanism is the same one that moves markets around any Fed-relevant data: a PCE print that comes in hotter or cooler than economists expected shifts the odds traders assign to a rate cut or hike, those odds move bond yields, and bond yields reset how investors value future company earnings, particularly for growth and high-valuation stocks. This week's release carries extra weight because it lands in the same five-day stretch as the Jackson Hole symposium, where the Fed chair typically previews policy thinking, and comes ahead of the September 15 and 16 FOMC meeting. See what the Fed's June and July decisions already signaled for the fuller rate-path context this report will be read against.

The honest counterargument

Someone could reasonably argue that ignoring the PCE report entirely means missing real, tradeable signal. Professional traders and the Fed itself take this number seriously for a reason: it genuinely informs monetary policy, and monetary policy genuinely moves markets in the short run. Dismissing every data point as noise would be its own kind of mistake.

The catch is timing. By the time you read a PCE headline in the news, professional trading desks with automated models have already repriced markets in the minutes after the 8:30 a.m. release. A long-term individual investor reacting to that headline is not getting ahead of the information, they are trading on old news with extra steps. The report matters for understanding the economy. It is a poor basis for adjusting your own portfolio on the day it drops. See why time in the market beats timing the market for the broader case against reacting to any single data release.

What a beginner should actually do

  • Do not trade around the PCE release itself. The market has already repriced by the time you see the headline.
  • Keep automatic contributions running through the release, whatever the number shows.
  • Watch the trend across several months, not one print, since the gap between PCE and CPI can flip for reasons unrelated to the broader inflation picture.
  • Let Fed statements and the dot plot, not individual data releases, guide your sense of where rates are headed. See how the CPI report affects the stock market for the same discipline applied to that release.
  • If you are rate-sensitive, holding adjustable debt or deciding where to park cash, reassess after a pattern confirms itself, not after one month's data.
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The actionable takeaway: Know which report the Fed actually targets so headlines built around CPI alone do not throw off your read of where rates are headed. Then let your investing plan run on autopilot regardless of what either report says this month.

The quick version

  • The Fed's 2% inflation target is defined in terms of core PCE, not CPI, since 2012
  • PCE covers a broader basket, including employer and government healthcare spending, and updates its weights monthly to capture substitution
  • CPI weights shelter about twice as heavily as PCE and updates its basket only once a year
  • Core PCE ran at 3.3% year over year in June 2026, versus 2.6% for core CPI, a reversal of the usual pattern that has held since November 2025
  • The Bureau of Economic Analysis releases July's PCE data on August 26, 2026, alongside the Jackson Hole symposium
  • Markets reprice within minutes of the release, so reacting to the headline after the fact is trading on old news
  • The right move is to track the trend, not the print, and keep your plan running regardless

Two inflation reports, two agendas: CPI tells you what a typical household actually paid out of pocket last month, and PCE tells you the number that actually steers the Fed's hand. Knowing the difference does not change what you should do with your portfolio. It just means the next time PCE and CPI tell different stories, you will know which one the Fed is listening to.