News · Measurement
On September 30 the Bureau of Economic Analysis re-priced three categories of the PCE price index and revised five years of history. July, reported at 3.7% five weeks ago, is now 3.4%. No price moved. The gap to the Reality Index did.
On Tuesday morning the BEA released the August reading of the PCE price index — the inflation measure the Federal Reserve actually targets — alongside its annual revision of the national accounts. The August headline came in at 3.4%, core at 3.0%. Those are the numbers that will frame the Fed’s next meeting.
They are also lower than they would have been under the method the BEA was using a month ago. July, which the BEA reported at 3.7% headline and 3.3% core on August 26, is now about 3.4% and 3.0%. Nothing happened to July’s prices in the intervening five weeks. What happened is that three categories of spending are now priced differently, and the new prices were applied backwards to 2021.
The BEA’s own annual-update article lays it out, and to its credit, in plain language.
Portfolio management and investment advice. The old method took Census revenue for the industry and deflated it with a producer price index to get a quantity of services consumed. The two sources disagreed, which produced what the BEA calls “uncorroborated volatility.” The fix: stop pricing the service at all. Quantity is now extrapolated from the number of people employed in the industry, and the price index is whatever is left over once revenue is divided by headcount. If fees rise while headcount is flat, that now registers as more service, not a higher price.
Legal services. The CPI for legal services, the BEA notes, has been “mostly unpublished since 2023” because it “did not meet BLS publication quality guidelines.” It has been replaced by a blend of five producer price indexes — what law firms report charging for negligence, estate, real-estate and employment work — weighted by unpublished detail from the PCE itself.
Computer software. The CPI series is now blended with producer indexes for game publishing and cloud-hosting services, on the grounds that the national accounts’ definition of the category never matched the CPI’s.
Each change has a defensible rationale, and the BEA says the revised series “follow the same general pattern as previously published while reducing quarter-to-quarter volatility.” It does not say what the changes did to the inflation rate. The before-and-after prints say it for them.
There is a pattern here that long predates this revision, and it is the reason the Reality Index exists. When an official price measure is reworked — hedonic adjustment for cars and electronics, geometric means for substitution, owners’ equivalent rent for housing, and now employment-based extrapolation for financial advice — the revised number comes in below the old one. Each change is reasoned. Each is documented. And each moves the same way.
That is not evidence of anyone cooking anything. It is evidence of what happens when the people improving a measure are also the people whose job gets easier when the measure is lower, and when the improvements consistently take the form of modelling a price instead of observing one.
The Reality Index is built on the second kind. Its housing is priced from mortgage rates, house prices and rents. Its vehicles are priced at Manheim’s auctions and Kelley Blue Book’s transaction records. It holds a fixed basket so that nothing can be substituted away. Nobody re-levels it in September because a source stopped meeting publication guidelines.
Against the CPI, nothing changed on Tuesday: the Reality Index ran 94 basis points above the official rate in August, as it has, within a few points, all year. The BLS made no change to the CPI; its 2026 notices are seasonal factors, a rebasing of some series, and a geographic sample update that takes effect in 2028.
Against the Fed’s preferred gauge, the gap widened by about 30 basis points without a single price moving. August: Reality Index +4.33%, PCE +3.4%, core PCE +3.0%. A household living the fixed middle-class basket is now a point and a third above the number the central bank uses to decide whether its problem is solved.
The Fed meets with that 3.0% in front of it. The register does not know it has been revised.
Sources. BEA, Survey of Current Business, “The 2026 Annual Update of the National Economic Accounts” (September 2026); BEA, Personal Income and Outlays, July 2026 (August 26, 2026) and August 2026 (September 30, 2026); BLS, CPI notices, 2026. Reality Index figures from the monthly index: fixed-2000-basket Laspeyres, not seasonally adjusted.