BCHT vs NSSC: Correlation
How closely do Birchtech Corp. (BCHT) and NAPCO Security Technologies, Inc. (NSSC) trade together? Their weekly returns over three years give a correlation of 0.33, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BCHT and NSSC?
Across a 3-year window, the weekly returns of BCHT and NSSC correlate at 0.33, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.02 versus 0.33 over 3 years. Stretching to 5 years gives 0.12, with an annualized covariance of 1360.2 %².
NSSC is one of the assets that tracks BCHT most closely: it ranks #3 out of the 12 assets we track against BCHT. Their recent paths diverged sharply: over the last 12 months NSSC outperformed by 48.1 percentage points (-54.9% for BCHT against -6.8% for NSSC). Risk is not evenly split, since BCHT carries 1.6 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.
BCHT vs NSSC: side by side
| BCHT (Birchtech Corp.) | NSSC (NAPCO Security Technologies, Inc.) | |
|---|---|---|
| 1-year return | -54.9% | -6.8% |
| 5-year return | -67.4% | +91.1% |
| Volatility (ann.) | 80.4% | 51.3% |
| Beta vs S&P 500 | 0.41 | 1.46 |
| Max drawdown (3Y) | -80.2% | -65.4% |
| Market cap | – | $1.3B |
| P/E (trailing) | – | 29.6 |
| Dividend yield | 0.00% | 1.62% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BCHT | NSSC |
|---|---|---|
| 2022 | -55.9% | +10.0% |
| 2023 | +253.8% | +25.6% |
| 2024 | -44.6% | +5.0% |
| 2025 | +47.1% | +19.2% |
| 2026 | -66.9% | -14.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BCHT and NSSC good diversifiers for each other?
Reasonably. At 0.33, BCHT and NSSC keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between BCHT and NSSC?
The BCHT/NSSC correlation stands at 0.33 on a 3-year window (1 year: 0.02, 5 years: 0.12), computed from weekly returns as of 2026-08-27.
Is NSSC a good diversifier for BCHT?
Reasonably. At 0.33, BCHT and NSSC keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.33 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.
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Related comparisons
Hubs: BCHT correlations · NSSC correlations
