0.27% on a Rewritten Index (August PCE Preview, 30 September 2026): What to Expect and What It Means for the Dollar
August PCE lands 30 September at 8:30 ET; the Cleveland Fed nowcast sees core +0.27%, 3.40% y/y — on the same morning BEA rewrites the index back to 2021.
0.27% on a Rewritten Index (August PCE Preview, 30 September 2026): What to Expect and What It Means for the Dollar
August's Personal Income and Outlays report lands at 8:30 a.m. Eastern on Wednesday 30 September, and the Cleveland Fed's nowcast puts core PCE at +0.27% on the month and 3.40% on the year. But the number arrives on the same morning the Bureau of Economic Analysis rewrites the index back to 2021 — including the portfolio-management line that supplied roughly half of July's core increase. The July figure everyone remembers, 3.3%, will no longer exist by 8:31.
This is the Fed's target measure, printed two weeks after a rate hike, into a front end that already prices more. The useful question is not what it will say. It is which comparison will still be valid once it does.
- Release: Wednesday 30 September 2026, 8:30 a.m. EDT, per BEA. Nowcast: core +0.27% m/m, 3.40% y/y; headline +0.34%, 3.78% (Cleveland Fed, 25 September).
- Same morning, BEA's annual update revises Q1 2021–Q1 2026 and changes three deflators: portfolio management, legal services and software.
- July's 3.344% core was the last reading on the old method. Compare August with the revised July in the same release, not with 3.3%.
- The inputs split: core CPI +0.29% and hospital PPI +0.62% push up; portfolio-management PPI −1.43% would have pushed down — on a method being retired.
- The two-year yield is 4.81% against a 3.875% policy midpoint. The dollar reacts to changes in that path, not to the print itself.
- The live currency strength meter scores the dollar and seven other majors on five factors; this report reaches the interest-rate factor first.
When the August PCE report is released — and what else lands with it
BEA's July release set the timetable: Personal Income and Outlays, August 2026 publishes on 30 September at 8:30 a.m. EDT. What makes this edition unusual is the sentence underneath it. The 2026 annual updates of national, industry and regional statistics all begin that day — the first time BEA has run them concurrently — and the national update explicitly includes "monthly personal income and outlays." BEA's July release says updated monthly estimates will be published on 30 September "along with the estimate for August 2026."
So the report has two parts that usually arrive months apart. One is a new month of data. The other is a revised history covering the first quarter of 2021 through the first quarter of 2026, built with new source data — the 2023 Annual Integrated Economic Survey, 2023 IRS income tabulations and first-quarter wage data from the BLS Quarterly Census of Employment and Wages — plus three methodology changes, all set out in BEA's preview of the annual update.
The rest of the week is crowded. The September jobs report follows on Friday 2 October, so the PCE print is the first half of a two-part test for a Committee that has just started hiking again.
What the forecasts expect for August
The most transparent public estimate is the Cleveland Fed's daily inflation nowcast, which in July came within a tenth of a basis point on core. As of 25 September:
| Measure | Nowcast for August | July, as published (old method) |
|---|---|---|
| Core PCE, month over month | +0.27% | +0.246% |
| Core PCE, year over year | 3.40% | 3.344% |
| Headline PCE, month over month | +0.34% | +0.156% |
| Headline PCE, year over year | 3.78% | 3.701% |
The right-hand column is the problem. It is the vintage BEA supersedes on the morning of the release. A nowcast is a model of the method it has been trained on, and on 30 September that method changes for three categories. The nowcast is still the best single reference point available — but it is a reference to a world that ends at 8:30.
Most of the inputs are already public. BLS data retrieved from its public API show:
| Input published in September | August change | What it feeds in PCE |
|---|---|---|
| Core CPI (seasonally adjusted) | +0.29% | Most goods and many services, at PCE weights |
| PPI, hospitals (not seasonally adjusted) | +0.62% m/m; +3.52% y/y | A large share of health care services |
| PPI, portfolio management | −1.43% m/m (after +5.39% in July); +17.75% y/y | Portfolio management and investment advice — on the old method |
| PPI, final demand less foods, energy and trade | +0.10% | Background pipeline pressure |
Two of those push the core reading up. Health care matters more in PCE than in CPI because PCE counts spending made on households' behalf, including employer-funded insurance, and BEA prices hospital care from the producer index rather than the consumer one. The third line is the one being rewritten.
The line that changes: portfolio management
In July this category was the story. Portfolio management and investment advice prices rose 5.624% in BEA's index that month and contributed roughly 0.12 percentage points to a 0.246% core increase — close to half — as covered in the July PCE breakdown. The mechanism is that fees are charged as a percentage of assets, so a producer price index that treats revenue per account as the "price" records equity-market gains as inflation, with a lag.
On the old method, August would have run the other way. The PPI for portfolio management fell 1.43% in August. At about 2.1% of the core basket, a move of that size is worth something like −0.03 percentage points on the month — small, but in the right direction to offset part of the health care push.
On 30 September that link is cut. BEA replaces the PPI for this category with a quantity extrapolator based on BLS employment data, which it says will "better reflect the timing and quantity of services consumed." In plain terms: instead of inferring real output from fee revenue deflated by a price index that tracks asset values, BEA will anchor the volume of the service to employment in the industry.
The two smaller changes cut in their own directions. Legal services moves from a CPI series to a composite of detailed legal-services PPIs from 2024 onward. Computer software moves from a single CPI to a blend of that CPI with PPIs for game software publishing and for hosting and IT infrastructure. Neither is large in the basket; both are reasons the revised history will not match the old one line for line.
The comparison that will be wrong on the day
Here is the specific trap. July core PCE was widely reported as 3.3%. If August prints at, say, 3.2% on the new basis, the tempting headline is "inflation eased." That reading is only valid if July, re-estimated on the same method, still reads 3.3%. If the revision took July down to 3.2%, August at 3.2% is flat. If it took July to 3.1%, August at 3.2% is an acceleration.
The same logic applies to the monthly figure, which is where rate markets usually look first. A monthly print is less exposed to the base-period change, but it is not immune: the August change on the new method is not comparable with a July change computed on the old one.
There is a second revision worth watching that has nothing to do with prices. BEA folds first-quarter QCEW wage data into personal income on the same day. July's personal saving rate was 3.0%, near multi-decade lows, and saving is calculated as the residual of income minus outlays — so a revision to wages flows directly into it. A materially higher or lower saving rate changes the question of how much room consumers have left, which matters for a Committee weighing inflation against real spending that stalled at zero in July.
Three scenarios and what each would mean for the dollar
The Federal Reserve raised its target range to 3.75–4.00% on 16 September by a 12–0 vote, and the median projection shows one more quarter-point increase this year, as covered in the September rate decisions. The market has gone further. On the Treasury's daily par yield curve, the two-year note closed at 4.81% on 25 September, roughly 94 basis points above the 3.875% policy midpoint; the ten-year was at 5.17%.
| Scenario | What it looks like on the new vintage | Channel to the dollar |
|---|---|---|
| Firm | Core ≥ 0.3% m/m and the y/y rate at or above revised July | Validates the extra hike in the projections and some of what the two-year already prices; the rate factor supports USD, with the ceiling set by how much is already in |
| Model-consistent | Core near 0.27% m/m, y/y roughly unchanged against revised July | Little new information on the path; attention moves to Friday's jobs report |
| Soft, or softened by revision | Core ≤ 0.2% m/m, or history revised down enough to lower the y/y rate materially | Challenges a front end sitting ~94bp over the policy midpoint; the rate leg of USD support is what gives back first |
The asymmetry is in the positioning, not the data. With the two-year already well above the policy rate, a firm print confirms a path the market has largely priced, while a soft one — or a revision that lowers the level of inflation the Committee has been reacting to — contradicts it. That does not tell you which will happen. It tells you where the larger repricing would have to come from.
What to watch at 8:30
- The revised July core rate, printed in the same tables. This is the benchmark August must be read against.
- The portfolio management and investment advice line in BEA's underlying price detail. It shows whether the new method still carries the equity-market echo.
- Health care services, where the hospital PPI's 0.62% monthly rise feeds through.
- The revised saving rate and real spending for July and August, which frame the growth side of the argument.
- The two-year yield in the first minutes, relative to where it opened. That is the rate factor in real time; the dollar page tracks how it feeds the USD score, and the same channel runs in reverse through the euro and yen.
Bottom line
On most months, the PCE report is a known quantity by the time it lands: CPI and PPI have already been translated, and the nowcast is rarely far off. This month it is different because the ruler changes on the morning of the measurement. The core figure will be read against a 3.3% that, by then, has been replaced — and the category BEA is rewriting is precisely the one that made July's number look stickier than the rest of the basket. The mechanism to hold onto is simple: read August against revised July, read the month against a front end already priced for more, and treat any claim about the revision's size before 8:30 as a guess. The August CPI detail that feeds this print is in the August CPI breakdown, and the thinking behind the site's approach is on the about page.
Educational macro context only — not investment advice.