The Bureau of Economic Analysis (BEA) is set to update how it measures prices for a handful of services, a technical tweak that could quietly lower a key inflation reading that the Federal Reserve and markets watch closely. The change, scheduled for September 30 as part of the annual GDP revision, may reduce May's core personal consumption expenditures (PCE) price index to roughly 3.2%-3.3% from the originally reported 3.4%, according to estimates from Goldman Sachs and JPMorgan.
Core PCE is the Fed's preferred inflation gauge because it strips out volatile food and energy prices, giving policymakers a clearer view of underlying price trends. The central bank targets a 2% annual rate for this measure. Any revision that brings the number closer to that target could influence how investors interpret the pace of disinflation and what it means for interest rates.
What's Changing and Why
The BEA said it will alter how it calculates prices for three categories: portfolio management and investment advice, legal services, and computer software. These are not new data points but rather methodological improvements in how existing data is processed. The agency periodically updates its methods to better reflect economic reality, and this round focuses on services where pricing can be complex or tied to asset values.
For example, fees for investment advice often move with stock market performance, which can introduce volatility into the inflation measure. The BEA's adjustment aims to smooth out such effects. The revisions will apply not just to the most recent data but all the way back to 2021, meaning the entire recent inflation trend could look slightly different after September 30.
Goldman Sachs estimates the change could lower May's year-on-year core PCE by about 0.2 percentage points, to 3.2%. JPMorgan sees a slightly smaller reduction, to around 3.3% after rounding. Both banks emphasize that no actual prices in the economy need to change for the printed number to move—it is purely a statistical recalibration.
What It Means for Investors
For everyday investors, this is a reminder that inflation data is not a perfect mirror of reality. The published numbers are estimates based on models and assumptions, and they can be revised months or even years later. A lower core PCE reading could be interpreted as progress toward the Fed's 2% target, potentially reducing pressure on the central bank to keep raising interest rates.
That, in turn, could affect short-dated US Treasury yields and interest-rate futures, which are sensitive to changes in rate expectations. Lower yields can boost bond prices and make borrowing cheaper for consumers and businesses. However, because the revision is methodological rather than reflecting actual price declines, its impact on markets may be muted once investors digest the news.
The fact that the changes run back to 2021 means the entire recent inflation narrative could be reshaped. Analysts who have argued that inflation is "stuck" above 3% may need to revise their views if the historical data shows a lower trajectory. Conversely, those who see disinflation as on track might find their case strengthened.
For context, the Fed has been closely watching core PCE as it decides whether to pause or continue its rate-hiking cycle. The central bank raised rates aggressively in 2022 and early 2023 to combat inflation, but has signaled it may slow down as price pressures ease. A lower core PCE reading, even if due to methodology, could reinforce the case for a pause.
Investors should also note that the revision is not a one-off event. The BEA plans to incorporate the changes into monthly personal income and outlays reports going forward, meaning future inflation data will also be affected. This could create a persistent downward bias in core PCE readings compared to what would have been reported under the old method.
Other recent inflation data has shown mixed signals. Treasury yields edged up recently as oil price gains stoked inflation concerns, while US consumer sentiment edged up in June and inflation expectations cooled. The BEA's revision adds another layer of complexity to the inflation picture.
For those tracking the Fed's next moves, September 30 could be a date to watch. The revised data may shift the narrative around whether inflation is truly cooling or just being measured differently. Either way, it underscores that the numbers investors rely on are not set in stone.
