ARAY vs QQQ: Correlation
Accuray Incorporated (ARAY) and Invesco QQQ Trust (QQQ) show a moderate relationship: their 3-year correlation of weekly returns is 0.31.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ARAY and QQQ?
Over the past 3 years, ARAY and QQQ moved with a correlation of 0.31, which is moderate. Little has changed lately, as the 1-year reading of 0.28 lands near the 3-year figure. Over 5 years the correlation is 0.39, and the annualized covariance of weekly returns is 445.8 %².
QQQ is close to the least connected end of ARAY's tracked universe, ranking #7 of 10. Their recent paths diverged sharply: over the last 12 months QQQ outperformed by 109.6 percentage points (-83.3% for ARAY against +26.3% for QQQ). One caveat on sizing: ARAY is 3.7 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.
ARAY vs QQQ: side by side
| ARAY (Accuray Incorporated) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | -83.3% | +26.3% |
| 5-year return | -93.4% | +95.4% |
| Volatility (ann.) | 73.2% | 19.6% |
| Beta vs S&P 500 | 1.77 | 1.28 |
| Max drawdown (3Y) | -92.5% | -22.8% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| 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 | ARAY | QQQ |
|---|---|---|
| 2022 | -56.2% | -32.6% |
| 2023 | +35.4% | +54.9% |
| 2024 | -30.0% | +25.6% |
| 2025 | -58.6% | +20.8% |
| 2026 | -68.0% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ARAY and QQQ good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.31 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ARAY and QQQ?
As of 2026-08-27, the correlation of weekly returns between ARAY and QQQ is 0.31 over 3 years, 0.28 over 1 year and 0.39 over 5 years.
Is QQQ a good diversifier for ARAY?
Yes, to a useful degree: a correlation of 0.31 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.31 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: ARAY correlations · QQQ correlations
