Key Takeaways: U.S. home prices rose 2.1% in the year to August 2026 on the S&P Cotality Case-Shiller National Index, up from 1.9% in July, while the FHFA House Price Index rose 2.4% over the same year. Both gains trailed August inflation of 3.4%, so prices fell in real terms for a 15th straight month. The map split wide: Chicago prices rose 6.7% in a year while Seattle prices fell 2.0%.
Your home can be worth more than a year ago and still be worth less. That is the story in the two big price indexes released on October 27.
S&P Dow Jones Indices released the August 2026 Case-Shiller results that day, and the Federal Housing Finance Agency released its August House Price Index the same morning. Read together, they agree on the direction and disagree only on the size.
Two Indexes, One Message: Prices Up on Paper, Down After Inflation
The FHFA release tracks single-family values using purchase-only data from Fannie Mae and Freddie Mac and a weighted repeat-sales method. Case-Shiller tracks repeat sales too, and its national index covers all nine U.S. census divisions.
| August 2026 reading | Figure |
|---|---|
| Case-Shiller National, year over year | +2.1% |
| Case-Shiller National, July year over year | +1.9% |
| Case-Shiller 10-City Composite, year over year | +3.6% |
| Case-Shiller 20-City Composite, year over year | +2.7% |
| FHFA House Price Index, year over year | +2.4% |
| FHFA House Price Index, month over month | +0.3% |
| Consumer price inflation, year over year | +3.4% |
Here is the insight the headline hides. A 2.1% gain against 3.4% inflation is a real loss of about 1.3 percentage points, and August was the 15th straight month that happened.
Rebecca Kaufman, Associate Director of Commodities at S&P Dow Jones Indices, said U.S. home prices “declined in real terms for the 15th consecutive month in August 2026, though the gap narrowed as nominal home price growth strengthened.”
The monthly numbers explain why some headlines sounded weaker. Before seasonal adjustment, Case-Shiller’s national index fell 0.2% in August. After adjustment, it rose 0.3%, which matches FHFA’s 0.3% monthly gain.
FHFA also revised July’s monthly gain down to 0.2% from the 0.3% it first reported. That pattern fits what investors saw a month later, when home prices rose 1.7% in the year to September but slipped from August.
An 8.7-Point Split: Chicago Up 6.7%, Seattle Down 2.0%
The national average is the least useful number in the release. Nearly 9 percentage points separated the strongest metro from the weakest.
- Leading metros: Chicago rose 6.7% in a year, leading all 20 tracked metros for a sixth straight month. New York followed at 6.2% and Cleveland at 4.3%.
- Falling metros: Seattle fell 2.0%, the largest annual decline for a third straight month. Las Vegas fell 1.3% and Denver fell 0.8%.
- FHFA regions: monthly changes ranged from a 0.8% drop in New England to a 2.1% gain in the East South Central division. Over 12 months, the range ran from 0.5% in the Mountain division to 4.4% in the East North Central division.
- One missing metro: Detroit got no valid August Case-Shiller update because of transaction recording delays in Wayne County. S&P Dow Jones Indices published a valid July update instead.
That split is now a pattern, not a one-month quirk. Home prices rose in 78% of metros in the third quarter, even as overall sales stalled, so most places gained while a handful of expensive Western markets gave ground back.
Rates set the ceiling for all of it. Mortgage rates ended October at 7.24%, which keeps monthly payments high even where the sticker price barely moves.
What Beginner Investors Should Do When Gains Trail Inflation
- Underwrite in real terms. If prices in your market rise 2% while inflation runs 3.4%, the property is losing purchasing power on price alone. Rent income and a good purchase price have to carry the return.
- Price your metro, not the nation. A deal in Chicago, up 6.7%, and a deal in Seattle, down 2.0%, cannot share the same price assumption. Pull your metro reading from the release before you offer.
- Read both monthly versions. The unadjusted index fell 0.2% and the adjusted index rose 0.3% in the same month. One headline without the other will mislead you about momentum.
- Shop the falling metros carefully. Seattle, Las Vegas, and Denver posted annual declines, which can mean better entry prices. Check local jobs and inventory first, because a falling price alone is not a bargain.
- Mark November 24 on your calendar. FHFA releases its next index that day, with monthly data through September and quarterly data through the third quarter. That release will show whether the real-terms streak reaches 16 months.
The bottom line is simple. Prices rose 2.1% on Case-Shiller and 2.4% on FHFA in the year to August, and both trailed 3.4% inflation. Investors who plan for flat real prices, and who buy on local numbers instead of national headlines, are the ones this market rewards.
Data: S&P Dow Jones Indices, S&P Cotality Case-Shiller Indices, August 2026 results, released October 27, 2026; U.S. Federal Housing Finance Agency, FHFA House Price Index, August 2026, released October 27, 2026.
