PESI vs QQQ: Correlation
How closely do Perma-Fix Environmental Services, Inc. (PESI) and Invesco QQQ Trust (QQQ) trade together? Their weekly returns over three years give a correlation of 0.18, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PESI and QQQ?
On 3 years of weekly data the PESI/QQQ correlation comes out at 0.18, weak. Little has changed lately, as the 1-year reading of 0.12 lands near the 3-year figure. The 5-year figure is 0.17, and annualized covariance runs at 210.5 %².
Out of 10 assets tracked against PESI, QQQ lands near the bottom at #7. Their recent paths diverged sharply: over the last 12 months PESI outperformed by 35.1 percentage points (+61.4% for PESI against +26.3% for QQQ). Note the risk asymmetry: PESI runs 3.0 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.
PESI vs QQQ: side by side
| PESI (Perma-Fix Environmental Services, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +61.4% | +26.3% |
| 5-year return | +234.5% | +95.4% |
| Volatility (ann.) | 59.3% | 19.6% |
| Beta vs S&P 500 | 1.10 | 1.28 |
| Max drawdown (3Y) | -58.0% | -22.8% |
| Market cap | $0.4B | – |
| 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 | PESI | QQQ |
|---|---|---|
| 2022 | -44.2% | -32.6% |
| 2023 | +122.7% | +54.9% |
| 2024 | +40.8% | +25.6% |
| 2025 | +13.7% | +20.8% |
| 2026 | +53.3% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PESI and QQQ good diversifiers for each other?
Yes: at 0.18, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between PESI and QQQ?
As of 2026-08-27, the correlation of weekly returns between PESI and QQQ is 0.18 over 3 years, 0.12 over 1 year and 0.17 over 5 years.
Is QQQ a good diversifier for PESI?
Yes: at 0.18, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of 0.18 mean?
A reading of 0.18 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/pesi-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/pesi-vs-qqq/)
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Related comparisons
Hubs: PESI correlations · QQQ correlations
