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Housing Price Index

Also known asHPI
Published Nov 13, 2024Updated Mar 18, 2026

What Is Housing Price Index?

The Housing Price Index tracks home price changes over time. FHFA HPI uses conforming mortgage data; case-shiller-index uses repeat sales in 20 metros. Investors use HPI for appreciation assumptions, market-fundamentals, and cycle timing. Expansion-phase and peak-phase show strong HPI growth; contraction-phase shows declines. Bubble risk when HPI growth far exceeds rental-income and income growth.

The Housing Price Index (HPI) is a measure of home price changes over time—typically tracking repeat sales or appraisals—used to gauge appreciation, market-value trends, and market-fundamentals by geography.

At a Glance

  • What it is: Measure of home price changes over time
  • Why it matters: Appreciation assumptions, market-fundamentals
  • Sources: FHFA HPI, case-shiller-index
  • Geography: National, metro, state, submarket
  • Lag: 2–3 months typical

How It Works

FHFA HPI. Federal Housing Finance Agency index. Uses conforming mortgage data (Fannie/Freddie). Covers all 50 states, metros, and submarkets. Repeat-sales methodology. Quarterly and monthly. Free.

Case-Shiller. S&P case-shiller-index. Repeat sales in 20 metros + national composite. More widely cited for primary-market metros. Monthly, 2-month lag. Case-shiller-index is a type of HPI.

Real estate impact. HPI growth supports appreciation assumptions. Expansion-phase and peak-phase show strong growth. Contraction-phase shows declines. Bubble risk when HPI growth far exceeds rental-income and income—prices disconnect from market-fundamentals.

Real-World Example

Ava tracks FHFA HPI for Memphis. 2020–2023: +38% cumulative. Expansion-phase and peak-phase.

She models 3% annual appreciation for underwriting—conservative vs. recent HPI. Case-shiller-index for primary-market metros shows similar trends. HPI informs market-fundamentals and appreciation assumptions.

Pros & Cons

Advantages
  • Appreciation and market-value trend data
  • FHFA and case-shiller-index are authoritative
  • Geography: national, metro, submarket
  • Free (FHFA) or widely available (case-shiller-index)
Drawbacks
  • 2–3 month lag
  • Submarket variance—metro-level can mask local trends
  • Bubble risk when HPI growth exceeds rental-income and income
  • SFR-focused—multifamily has different indexes

Watch Out

  • Bubble risk: HPI growth far exceeding rental-income and income = bubble
  • Lag: 2–3 months typical
  • Submarket: Metro-level can mask submarket variance
  • Exit risk: Contraction-phase HPI decline can reverse appreciation

Ask an Investor

The Takeaway

Housing Price Index tracks home price changes. FHFA and case-shiller-index are key sources. Use for appreciation assumptions and market-fundamentals. Bubble risk when HPI growth far exceeds rental-income and income.

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