ASTS vs NSYS: Correlation
How closely do AST SpaceMobile, Inc. (ASTS) and Nortech Systems Incorporated (NSYS) trade together? Their weekly returns over three years give a correlation of -0.20, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASTS and NSYS?
Over the past 3 years, ASTS and NSYS moved with a correlation of -0.20, which is negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (0.06) than the 3-year average (-0.20). Over 5 years the correlation is -0.08, and the annualized covariance of weekly returns is -1254.5 %².
Out of 11 assets tracked against ASTS, NSYS lands near the bottom at #9. Over the last 12 months NSYS came out ahead by 9.3 percentage points (+27.3% against +36.6%). Note the risk asymmetry: ASTS runs 2.3 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
ASTS vs NSYS: side by side
| ASTS (AST SpaceMobile, Inc.) | NSYS (Nortech Systems Incorporated) | |
|---|---|---|
| 1-year return | +27.3% | +36.6% |
| 5-year return | +397.1% | -4.7% |
| Volatility (ann.) | 119.4% | 52.5% |
| Beta vs S&P 500 | 1.92 | 0.23 |
| Max drawdown (3Y) | -68.4% | -62.0% |
| Market cap | $23.9B | – |
| P/E (trailing) | – | 34.2 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ASTS | NSYS |
|---|---|---|
| 2022 | -39.3% | +18.4% |
| 2023 | +25.1% | -23.1% |
| 2024 | +249.9% | +9.2% |
| 2025 | +244.2% | -27.8% |
| 2026 | -15.4% | +65.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASTS and NSYS good diversifiers for each other?
By historical standards, yes. A correlation of -0.20 means the two rarely move for the same reasons.
FAQ
What is the correlation between ASTS and NSYS?
The ASTS/NSYS correlation stands at -0.20 on a 3-year window (1 year: 0.06, 5 years: -0.08), computed from weekly returns as of 2026-08-27.
Is NSYS a good diversifier for ASTS?
By historical standards, yes. A correlation of -0.20 means the two rarely move for the same reasons.
What does a correlation of -0.20 mean?
A reading of -0.20 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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$ curl https://www.pairbook.io/api/v1/pairs/asts-vs-nsys.json
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Related comparisons
Hubs: ASTS correlations · NSYS correlations
