NSSC vs WMS: Correlation
Measured on weekly returns over the past three years, NAPCO Security Technologies, Inc. (NSSC) and Advanced Drainage Systems, Inc. (WMS) carry a correlation of 0.44, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NSSC and WMS?
Across a 3-year window, the weekly returns of NSSC and WMS correlate at 0.44, moderate. Recent behaviour matches the longer record: 0.53 over 1 year against 0.44 over 3. Stretching to 5 years gives 0.38, with an annualized covariance of 846.9 %².
By 3-year correlation, WMS places #5 of the 14 assets tracked against NSSC. Twelve-month performance is nearly a tie, at -6.8% for NSSC and -4.4% for WMS.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
NSSC vs WMS: side by side
| NSSC (NAPCO Security Technologies, Inc.) | WMS (Advanced Drainage Systems, Inc.) | |
|---|---|---|
| 1-year return | -6.8% | -4.4% |
| 5-year return | +91.1% | +22.1% |
| Volatility (ann.) | 51.3% | 37.1% |
| Beta vs S&P 500 | 1.46 | 1.31 |
| Max drawdown (3Y) | -65.4% | -45.8% |
| Market cap | $1.3B | $10.5B |
| P/E (trailing) | 29.6 | 23.6 |
| Dividend yield | 1.62% | 0.52% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NSSC | WMS |
|---|---|---|
| 2022 | +10.0% | -39.5% |
| 2023 | +25.6% | +72.4% |
| 2024 | +5.0% | -17.5% |
| 2025 | +19.2% | +26.0% |
| 2026 | -14.7% | -3.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NSSC and WMS good diversifiers for each other?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between NSSC and WMS?
The NSSC/WMS correlation stands at 0.44 on a 3-year window (1 year: 0.53, 5 years: 0.38), computed from weekly returns as of 2026-08-27.
Is WMS a good diversifier for NSSC?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.44 mean?
A reading of 0.44 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/nssc-vs-wms.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/nssc-vs-wms/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: NSSC correlations · WMS correlations
