Why It Matters
Every month, NAHB surveys ~900 single-family builders about three things: current sales, expected sales in 6 months, and current buyer traffic. The traffic question is uniquely forward-looking. A prospective buyer who walks through a model home today isn't a sale — they're at the top of the funnel. If traffic is strong, pending sales accelerate 60-90 days later. If traffic is weak, pending sales slow in the next 2-3 months. The traffic sub-index is on the same 0-100 scale as the composite HMI, with 50 as neutral. For investors, it's the earliest signal in the housing data pipeline — earlier than pending sales (NAR), earlier than existing home sales, earlier than building permits. When traffic drops below 30, the market is signaling material weakness ahead.
At a Glance
- What it measures: Builder-reported traffic of prospective buyers at new-home sales and model centers.
- Scale: 0-100. 50 = neutral. Historical range since 1985: 6 (2009 trough) to 75 (2021 peak).
- Release cadence: Monthly, mid-month, as part of the NAHB HMI release.
- Lead time: 60-90 days ahead of NAR pending home sales; 90-120 days ahead of existing home sales.
- Weight in composite HMI: 20% (current sales 50%, expected sales 30%, traffic 20%).
- Key threshold: Below 30 signals material demand weakness. Above 60 signals strong buyer engagement.
How It Works
The survey question. NAHB asks each surveyed builder to rate current traffic of prospective buyers at new-home sales locations as "high to very high," "average," "low," or "very low." Responses convert to a 0-100 index: "high" responses boost the index, "low" and "very low" drag it down. The resulting sub-index gets published monthly alongside the composite HMI and the other two sub-indices (current sales and expected sales).
Why traffic leads the cycle. Traffic measures funnel entry — buyers who are actively considering a new home. Those buyers take 60-90 days to advance through the pipeline: initial visit, return visit, financing pre-approval, offer, contract, closing. A surge of traffic today becomes pending sales in 2-3 months and closings in 3-4 months. A drop in traffic today becomes weak pending sales 60-90 days out and soft closings 90-120 days out. The mechanical relationship is what makes traffic the earliest reliable signal.
The 30-threshold convention. Historical analysis of NAHB data shows traffic readings below 30 have consistently preceded material weakness in housing starts, permits, and pending sales. The 2008 housing crisis had traffic drop from 35 to 6 over 12 months. The 2022-2023 rate-shock slowdown saw traffic fall from 67 to 24 in 18 months. The 30 threshold isn't magic — it's observational: when fewer than 3 in 10 builders rate traffic as high/very high, demand has structurally weakened. Above 60, most builders see strong interest — an expansion setup.
Why investors weight traffic heavily. Of the three HMI sub-indices, traffic is the best single forward indicator. Current sales measures what's happening now. Expected sales measures builder sentiment about the future. Traffic measures actual buyer behavior today that will manifest as sales in the near future. It's the closest thing to real-time buyer-demand telemetry that's free and publicly available. Investors reading NAHB releases should check composite HMI first, then go directly to the traffic sub-index as the key signal.
Real-World Example
Carlos Medina uses the traffic sub-index to decide on a rental acquisition.
Carlos is deciding whether to close on a single-family rental in the Raleigh metro. It's April. He pulls the NAHB HMI release:
- Composite HMI: 38 (weak, below 50)
- Current sales: 44
- Expected sales (6 months): 40
- Buyer traffic: 22 (down from 28 in March, 34 in January)
Traffic at 22 is the standout weakness. The composite says builders are mildly pessimistic; the traffic sub-index says buyer demand is materially weak — weaker than the composite suggests.
Carlos reads this as good news for rental pricing. Weak new-home buyer traffic means households that would have moved to new construction stay in rentals longer. His rental competes less against new supply. He cross-references:
- Raleigh-Cary MSA NAR pending home sales: -8% YoY through March
- Raleigh ZORI rent index: +3.6% YoY
- Raleigh new-home months of supply: 6.4 months (elevated)
The pattern is consistent: buyer demand is weakening (traffic 22), new supply is accumulating (6.4 months), but rental demand is strong (rent +3.6% YoY). The typical landlord setup for rent growth acceleration in 12-18 months as rental competition from new builds diminishes.
He closes on the rental. Two months later, Raleigh pending sales drop another 6%, confirming the traffic signal was correct 60-90 days earlier. His decision to close was informed by an indicator nobody else tracked closely.
Pros & Cons
- Earliest reliable housing-demand signal — 60-90 days ahead of pending sales
- Free, public, monthly cadence from NAHB
- 40-year historical data for back-testing
- Measures actual behavior (traffic visits) not sentiment about sentiment
- Weighted at 20% of composite HMI so it influences the headline number
- Only covers new-home traffic — doesn't directly measure existing-home buyer demand
- Sample size is small (~900 builders) — subject to sampling noise in any single month
- Regional breakdowns have thinner samples and more volatility
- Builders' judgment of "traffic" is subjective and unstandardized
- Leading indicator only — doesn't tell you current transaction volumes
Watch Out
- Single-month moves are noisy: Traffic can swing 3-5 points month-to-month from sampling variation. Look for sustained 3+ month trends.
- New-home vs existing-home traffic: NAHB traffic measures new-home showing activity. Existing-home traffic (through Zillow browsing data, ShowingTime data) moves differently. For the full demand picture, check both.
- Regional differences: The NAHB traffic sub-index is released at national grain plus four regional breakouts (Northeast, Midwest, South, West). Regional numbers have thinner samples; treat as directional only.
- Not all traffic converts equally: High traffic with weak buyer quality (tire-kickers only) converts to sales slower than moderate traffic with high buyer quality. The index doesn't distinguish.
- Rate environment matters: Traffic responds to mortgage rates. When rates drop, traffic spikes even if underlying demand is weak. Always contextualize traffic against the rate environment.
Ask an Investor
The Takeaway
Buyer traffic is the earliest reliable housing-demand signal available — a sub-index of the NAHB Housing Market Index that measures prospective buyer visits at new-home sales centers. It leads pending sales by 60-90 days and existing home sales by 90-120 days. Below 30, material demand weakness ahead. Above 60, strong buyer engagement setup for expansion. The index is the closest thing to real-time buyer telemetry available to public investors. Pair with composite HMI, Census building permits, and NAR pending home sales to build a complete demand-supply read. Available monthly at nahb.org and via FRED.