PDEX vs QQQ: Correlation
Measured on weekly returns over the past three years, Pro-Dex, Inc. (PDEX) and Invesco QQQ Trust (QQQ) carry a correlation of 0.07, a near-zero link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PDEX and QQQ?
Over the past 3 years, PDEX and QQQ moved with a correlation of 0.07, which is near zero, meaning they move largely independently. The link has tightened recently: the 1-year correlation (0.31) runs above the 3-year figure (0.07). Over 5 years the correlation is 0.10, and the annualized covariance of weekly returns is 86.6 %².
Among the 31 assets we track against PDEX, QQQ ranks #6 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months PDEX outperformed by 16.2 percentage points (+42.5% for PDEX against +26.3% for QQQ). Risk is not evenly split, since PDEX carries 3.0 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.
PDEX vs QQQ: side by side
| PDEX (Pro-Dex, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +42.5% | +26.3% |
| 5-year return | +152.4% | +95.4% |
| Volatility (ann.) | 59.6% | 19.6% |
| Beta vs S&P 500 | 0.17 | 1.28 |
| Max drawdown (3Y) | -65.3% | -22.8% |
| Market cap | $0.2B | – |
| P/E (trailing) | 17.5 | – |
| 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 | PDEX | QQQ |
|---|---|---|
| 2022 | -31.5% | -32.6% |
| 2023 | +10.2% | +54.9% |
| 2024 | +166.8% | +25.6% |
| 2025 | -17.7% | +20.8% |
| 2026 | +68.6% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PDEX and QQQ good diversifiers for each other?
Yes. With a correlation of 0.07, PDEX and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between PDEX and QQQ?
Using weekly returns as of 2026-08-27: 0.07 over 3 years, with 0.31 over the last year and 0.10 over 5 years.
Is QQQ a good diversifier for PDEX?
Yes. With a correlation of 0.07, PDEX and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.07 mean?
A reading of 0.07 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
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[](https://www.pairbook.io/pair/pdex-vs-qqq/)
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Related comparisons
Hubs: PDEX correlations · QQQ correlations
