NSYS vs QQQ: Correlation
Nortech Systems Incorporated (NSYS) and Invesco QQQ Trust (QQQ) show a near-zero relationship: their 3-year correlation of weekly returns is 0.06.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NSYS and QQQ?
Over the past 3 years, NSYS and QQQ moved with a correlation of 0.06, which is near zero, meaning they move largely independently. Little has changed lately, as the 1-year reading of 0.08 lands near the 3-year figure. Over 5 years the correlation is 0.10, and the annualized covariance of weekly returns is 57.1 %².
By 3-year correlation, QQQ places #6 of the 16 assets tracked against NSYS. The trailing year gives NSYS the advantage: +36.6% versus +26.3%, a 10.3-point spread. One caveat on sizing: NSYS is 2.7 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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 QQQ: side by side
| NSYS (Nortech Systems Incorporated) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +36.6% | +26.3% |
| 5-year return | -4.7% | +95.4% |
| Volatility (ann.) | 52.5% | 19.6% |
| Beta vs S&P 500 | 0.23 | 1.28 |
| Max drawdown (3Y) | -62.0% | -22.8% |
| Market cap | – | – |
| P/E (trailing) | 34.2 | – |
| Dividend yield | 0.00% | 0.44% |
| Expense ratio | – | 0.18% |
| Assets under management | – | $452.8B |
| Sector / category | US Listed | ETF · US Growth & Tech |
QQQ is a Large Growth fund from Invesco: $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | NSYS | QQQ |
|---|---|---|
| 2022 | +18.4% | -32.6% |
| 2023 | -23.1% | +54.9% |
| 2024 | +9.2% | +25.6% |
| 2025 | -27.8% | +20.8% |
| 2026 | +65.7% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NSYS and QQQ good diversifiers for each other?
Yes. With a correlation of 0.06, NSYS and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between NSYS and QQQ?
As of 2026-08-27, the correlation of weekly returns between NSYS and QQQ is 0.06 over 3 years, 0.08 over 1 year and 0.10 over 5 years.
Is QQQ a good diversifier for NSYS?
Yes. With a correlation of 0.06, NSYS and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.06 mean?
A reading of 0.06 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/nsys-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/nsys-vs-qqq/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: NSYS correlations · QQQ correlations
