BEA Methodology Tweaks Set to Trim Core PCE Inflation by 0.2 Point
The Bureau of Economic Analysis is revising the methodology behind three subcategories of the Personal Consumption Expenditures Price Index, with updated data due September 30. Analysts have coalesced around a consensus…
The Bureau of Economic Analysis is revising the methodology behind three subcategories of the Personal Consumption Expenditures Price Index, with updated data due September 30. Analysts have coalesced around a consensus view that the changes will reduce core PCE inflation by roughly 0.2 percentage point — meaningful relief for a measure that registered 3.4% for the 12 months ended in May and has not touched the Federal Reserve's 2% target in a single month since March 2021. The technical case for the revisions is defensible, but the political timing is not.
What the BEA Is Changing
The three affected subcategories are portfolio management and investment advice services, computer software and accessories, and legal services. The BEA announced the changes late last month; they will be folded into the broader data revision release on September 30. The revisions are designed to give the PCE a sharper read on underlying price dynamics rather than allowing market performance or outdated product classifications to distort the index.
The Technical Argument
The portfolio management fix addresses a well-documented quirk: under the current methodology, a client paying a fixed 1% fee on an account that rises 20% in value effectively registers as a 20% increase in prices for asset management services. Former Fed governor Stephen Miran, in a speech last December, framed the problem plainly — what should be recorded as an increased quantity of services consumed is instead recorded as increased prices.
Miran, alongside Fed staff economists Alessandro Barbarino and Anthony M. Diercks, published a paper in May detailing flaws in the measurement of computer software and accessories, including how portable memory devices, video games, and other tech products are counted. JPMorgan economist Abiel Reinhart observed, with some wry understatement, that Grand Theft Auto VI may yet have a chance to move the Treasury curve.
Political Backdrop Complicates the Optics
Sound methodology or not, the revisions land against a fraught institutional backdrop. Less than a year ago, President Trump dismissed the commissioner of the Bureau of Labor Statistics following a weak jobs report; his initial replacement nominee drew broad criticism as underqualified. Brett Matsumoto, the current nominee for the post, has attracted wider support and his confirmation is pending in the Senate.
With the Trump administration pressing publicly for Federal Reserve interest rate cuts, data revisions that nudge inflation readings lower offer ready material for skeptics — even when the underlying adjustments are technically grounded.
Calls for Greater Transparency
Vikas Patel of Employ America, a liberal think tank, urged the BEA to be more transparent on timing, weights, and historical revisions given the erosion of trust in official data. Patel also called on statistical authorities to extend the same scrutiny to categories that share the same measurement challenges but were left untouched by this update.
The Fed's preferred inflation yardstick is about to get more accurate — and, incidentally, more favorable. Whether markets take the September 30 revision at face value may depend less on the math than on the institutional credibility surrounding it.