NSYS vs ZVIA: Correlation
How closely do Nortech Systems Incorporated (NSYS) and Zevia PBC (ZVIA) trade together? Their weekly returns over three years give a correlation of -0.24, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NSYS and ZVIA?
Over the past 3 years, NSYS and ZVIA moved with a correlation of -0.24, which is negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.15 lands near the 3-year figure. Over 5 years the correlation is -0.08, and the annualized covariance of weekly returns is -1021.4 %².
Among the 16 assets we track against NSYS, ZVIA sits near the bottom by co-movement, at rank #13. Correlation aside, the last 12 months split them widely, with NSYS ahead by 84.0 points (+36.6% versus -47.4%). Risk is not evenly split, since ZVIA carries 1.5 times the volatility of the other side.
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.
NSYS vs ZVIA: side by side
| NSYS (Nortech Systems Incorporated) | ZVIA (Zevia PBC) | |
|---|---|---|
| 1-year return | +36.6% | -47.4% |
| 5-year return | -4.7% | -90.1% |
| Volatility (ann.) | 52.5% | 80.3% |
| Beta vs S&P 500 | 0.23 | 1.22 |
| Max drawdown (3Y) | -62.0% | -78.2% |
| Market cap | – | $0.1B |
| P/E (trailing) | 34.2 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NSYS | ZVIA |
|---|---|---|
| 2022 | +18.4% | -42.0% |
| 2023 | -23.1% | -50.9% |
| 2024 | +9.2% | +108.5% |
| 2025 | -27.8% | -44.6% |
| 2026 | +65.7% | -38.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NSYS and ZVIA good diversifiers for each other?
Yes: at -0.24, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between NSYS and ZVIA?
Using weekly returns as of 2026-08-27: -0.24 over 3 years, with -0.15 over the last year and -0.08 over 5 years.
Is ZVIA a good diversifier for NSYS?
Yes: at -0.24, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.24 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/nsys-vs-zvia.json
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Related comparisons
Hubs: NSYS correlations · ZVIA correlations
