QQQ vs STXS: Correlation
Measured on weekly returns over the past three years, Invesco QQQ Trust (QQQ) and Stereotaxis, Inc. (STXS) carry a correlation of 0.25, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are QQQ and STXS?
Over the past 3 years, QQQ and STXS moved with a correlation of 0.25, which is weak. The link has tightened recently: the 1-year correlation (0.48) runs above the 3-year figure (0.25). Over 5 years the correlation is 0.34, and the annualized covariance of weekly returns is 249.3 %².
By 3-year correlation, STXS places #2179 of the 4755 assets tracked against QQQ. The last year tells two different stories: QQQ led by 75.1 percentage points, +26.3% for QQQ against -48.8% for STXS. Note the risk asymmetry: STXS runs 2.6 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.
QQQ vs STXS: side by side
| QQQ (Invesco QQQ Trust) | STXS (Stereotaxis, Inc.) | |
|---|---|---|
| 1-year return | +26.3% | -48.8% |
| 5-year return | +95.4% | -76.8% |
| Volatility (ann.) | 19.6% | 51.7% |
| Beta vs S&P 500 | 1.28 | 1.07 |
| Max drawdown (3Y) | -22.8% | -64.7% |
| Market cap | – | $0.1B |
| P/E (trailing) | – | – |
| Dividend yield | 0.44% | 0.00% |
| Expense ratio | 0.18% | – |
| Assets under management | $452.8B | – |
| Sector / category | ETF · US Growth & Tech | US Listed |
QQQ, Invesco's Large Growth fund, carries $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | QQQ | STXS |
|---|---|---|
| 2022 | -32.6% | -66.6% |
| 2023 | +54.9% | -15.5% |
| 2024 | +25.6% | +30.3% |
| 2025 | +20.8% | +0.9% |
| 2026 | +17.7% | -36.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are QQQ and STXS good diversifiers for each other?
Reasonably. At 0.25, QQQ and STXS keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between QQQ and STXS?
As of 2026-08-27, the correlation of weekly returns between QQQ and STXS is 0.25 over 3 years, 0.48 over 1 year and 0.34 over 5 years.
Is STXS a good diversifier for QQQ?
Reasonably. At 0.25, QQQ and STXS keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.25 mean?
A reading of 0.25 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/qqq-vs-stxs.json
Embed this badge (it refreshes with the data), with attribution:
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Related comparisons
Hubs: QQQ correlations · STXS correlations
