ACLS vs QQQ: Correlation
How closely do Axcelis Technologies, Inc. (ACLS) and Invesco QQQ Trust (QQQ) trade together? Their weekly returns over three years give a correlation of 0.54, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACLS and QQQ?
On 3 years of weekly data the ACLS/QQQ correlation comes out at 0.54, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.38 versus 0.54 over 3 years. The 5-year figure is 0.61, and annualized covariance runs at 542.9 %².
By 3-year correlation, QQQ places #6 of the 11 assets tracked against ACLS. The last year tells two different stories: ACLS led by 23.1 percentage points, +49.4% for ACLS against +26.3% for QQQ. Risk is not evenly split, since ACLS carries 2.6 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.
ACLS vs QQQ: side by side
| ACLS (Axcelis Technologies, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +49.4% | +26.3% |
| 5-year return | +140.5% | +95.4% |
| Volatility (ann.) | 51.6% | 19.6% |
| Beta vs S&P 500 | 1.57 | 1.28 |
| Max drawdown (3Y) | -78.0% | -22.8% |
| Market cap | $3.8B | – |
| P/E (trailing) | 40.4 | – |
| 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 | ACLS | QQQ |
|---|---|---|
| 2022 | +6.4% | -32.6% |
| 2023 | +63.4% | +54.9% |
| 2024 | -46.1% | +25.6% |
| 2025 | +15.0% | +20.8% |
| 2026 | +52.4% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACLS and QQQ good diversifiers for each other?
Only partially. A correlation of 0.54 means ACLS and QQQ share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between ACLS and QQQ?
As of 2026-08-27, the correlation of weekly returns between ACLS and QQQ is 0.54 over 3 years, 0.38 over 1 year and 0.61 over 5 years.
Is QQQ a good diversifier for ACLS?
Only partially. A correlation of 0.54 means ACLS and QQQ share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.54 mean?
A reading of 0.54 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/acls-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/acls-vs-qqq/)
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Related comparisons
Hubs: ACLS correlations · QQQ correlations
