ACFN vs QQQ: Correlation
Acorn Energy, Inc. (ACFN) and Invesco QQQ Trust (QQQ) show a weak relationship: their 3-year correlation of weekly returns is 0.13.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACFN and QQQ?
Across a 3-year window, the weekly returns of ACFN and QQQ correlate at 0.13, weak. Recent behaviour matches the longer record: 0.18 over 1 year against 0.13 over 3. Stretching to 5 years gives 0.02, with an annualized covariance of 201.0 %².
Among the 14 assets we track against ACFN, QQQ ranks #7 by 3-year correlation. The last year tells two different stories: QQQ led by 53.3 percentage points, -27.0% for ACFN against +26.3% for QQQ. One caveat on sizing: ACFN is 4.1 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.
ACFN vs QQQ: side by side
| ACFN (Acorn Energy, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | -27.0% | +26.3% |
| 5-year return | +122.5% | +95.4% |
| Volatility (ann.) | 81.3% | 19.6% |
| Beta vs S&P 500 | 0.68 | 1.28 |
| Max drawdown (3Y) | -58.1% | -22.8% |
| Market cap | $0.1B | – |
| P/E (trailing) | 33.9 | – |
| 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 | ACFN | QQQ |
|---|---|---|
| 2022 | -44.4% | -32.6% |
| 2023 | +8.8% | +54.9% |
| 2024 | +193.8% | +25.6% |
| 2025 | -15.6% | +20.8% |
| 2026 | +36.8% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACFN and QQQ good diversifiers for each other?
Yes. With a correlation of 0.13, ACFN and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between ACFN and QQQ?
Using weekly returns as of 2026-08-27: 0.13 over 3 years, with 0.18 over the last year and 0.02 over 5 years.
Is QQQ a good diversifier for ACFN?
Yes. With a correlation of 0.13, ACFN and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.13 mean?
On the −1 to +1 scale, 0.13 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/acfn-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/acfn-vs-qqq/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ACFN correlations · QQQ correlations
