Builder sentiment indexes are surveys, not counts of homes sold or forecasts of investment returns. The clearest example is the NAHB/Wells Fargo Housing Market Index (HMI), which measures U.S. builders’ views of the market for newly built single-family homes. Investors can use its direction and component readings as context for housing demand, then test that signal against actual housing and economic data.
What the NAHB/Wells Fargo HMI measures
The National Association of Home Builders (NAHB) and Wells Fargo produce the HMI from a monthly survey of single-family homebuilders. It asks builders about current sales of new single-family homes, expected sales over the next six months, and traffic of prospective buyers. NAHB describes its purpose as gauging “the pulse of the single-family housing market.” NAHB’s HMI methodology and release page explains the measure.
The HMI is a 0–100 index. A reading above 50 means more builders report confidence in current and near-term conditions than report a lack of confidence. It is not a tally of sales, housing starts, prices, or builder profits.
How the composite is calculated
The headline HMI combines three component indexes. NAHB assigns each a published weight, so the components do not contribute equally:
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| Component | What builders assess | Weight | Interpretation |
|---|---|---|---|
| Present sales | Current sales of new single-family homes | 0.5920 | Builders’ assessment of conditions now |
| Expected sales | Sales over the next six months | 0.1358 | Builders’ near-term outlook |
| Prospective-buyer traffic | Traffic of prospective buyers at new-home sites | 0.2722 | A demand-side indication from builder-reported visits |
For the sales questions, builders choose good, fair, or poor. NAHB converts responses using (good minus poor + 100) / 2. For traffic, the corresponding calculation uses high/very high and low/very low responses. NAHB says its builder panel is stratified by region and builder size and refreshed annually. The methodology page provides the calculation details.
How investors can read the signal
Start with direction and trend
A rising HMI indicates that builders’ reported sentiment is improving; a falling reading indicates it is weakening. Look at a sequence of releases rather than treating one month as decisive. The survey can provide context on how builders view demand and near-term conditions, but a change by itself does not establish what will happen to homebuilder stocks, home prices, or the wider economy.
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Check the components, not just the headline
The weighted composite can conceal a split in views. For example, current sales might be holding up while six-month expectations or buyer traffic are weaker. That mix would describe a different picture from one in which all three components improve together. Read the component values alongside the overall HMI before drawing a conclusion.
Compare sentiment with observed conditions
Use the HMI alongside measures of housing starts and sales, mortgage conditions, affordability, employment, and building costs. These indicators answer different questions: the HMI reports builders’ assessments, while activity data record events or outcomes. NAHB identifies interest rates, employment, material costs, and inflation among factors that can affect builder sentiment. A mismatch between survey views and observed activity is a reason to investigate the differences, not to assume one measure is wrong.
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What the HMI does—and does not—cover
The HMI is specifically about demand for new, single-family housing in the United States. It does not directly measure existing-home transactions, home prices, remodeling, rents, all residential construction, or affordability. NAHB maintains separate measures for other questions and segments, including the Remodeling Market Index, Multifamily Market Survey, and Home Building Geography Index. Its index directory lists those measures.
A historical Fannie Mae paper describes the HMI as a monthly mail survey of NAHB builder members that began in January 1985 and focused on demand for new rather than existing homes. It reported approximately 400 responses per month at the time of that paper; that historical figure should not be treated as a current sample count. The paper also compared the HMI with other housing-related measures: the REALTORS® Confidence Index as member survey measures, Freddie Mac’s Multi-Indicator Market Index (MiMi) as a composite of market data, and the Pulsenomics/Zillow Housing Confidence Index as a consumer survey with sub-indexes. Those descriptions document historical methods, not current availability or unchanged designs. See Fannie Mae’s Building a Home Purchase Sentiment Index.
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How much predictive weight to give it
NAHB reports that a 1994 peer-reviewed study by Federal Reserve Board research economist John Goodman found the HMI significantly helped predict housing-market variables such as starts among the attitude surveys considered. NAHB says its later reassessment found essentially similar predictive ability. This supports treating the index as historically informative about housing activity; it does not establish a guaranteed lead over activity, current predictive accuracy, or a strategy for earning investment returns. For investors, the appropriate use is as one input among several, not a buy-or-sell rule. See the validation discussion on NAHB’s HMI page.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.September 2026 reading: a dated example
In the September 2026 release, NAHB reported an HMI of 32, down three points. The component readings were 35 for present sales, 37 for six-month sales expectations, and 23 for prospective-buyer traffic. That combination puts the component values below the 50 confidence threshold and shows weaker buyer traffic than either sales measure. NAHB also reported that 38% of builders cut prices that month, with an average reduction of 6%, and 66% used sales incentives. These are September 2026 figures, not a standing description of current conditions; monthly readings change. Check the dated release on NAHB’s HMI page for the latest values.
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