Both the FHFA and Case‑Shiller released the latest update on home price appreciation this week. Actually, in the current case, it’s more like home price depreciation (at least in month over month terms). This is a bit confusing because average prices were higher versus the previous month, but that is virtually always true at this time of year.  Seasonal adjustments are very useful for data like home prices (which have a reliable cadence that follows the typical homebuying seasons).  It’s after adjusting for seasonality that we see emerging signs of weakness.  FHFA House Price Index (seasonally adjusted, MoM)
May: −0.2%; April was revised from −0.4% to −0.3%
YoY: +2.8% from May 2024 to May 2025
Monthly figures varied regionally: Middle Atlantic showed the steepest fall at −0.8%, while West South Central and New England saw modest gains of +0.3%. All nine census divisions remain positive YoY, ranging from +0.6% to +5.9%. Case‑Shiller National Index (unadjusted)
YoY: +2.3% in May, down from +2.7% in April
MoM (raw): +0.4%
MoM (seasonally adjusted): −0.3%
This marks the smallest annual national gain since July 2023 and the third consecutive monthly decline in seasonally adjusted data. Seasonally Adjusted Comparison Table: FHFA vs Case‑Shiller (May 2025)

Index
MoM (SA)
YoY

FHFA HPI
−0.2%
+2.8%

Case‑Shiller
−0.3%
+2.3%