DCI vs QQQ: Correlation
How closely do Donaldson Company, Inc. (DCI) and Invesco QQQ Trust (QQQ) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DCI and QQQ?
On 3 years of weekly data the DCI/QQQ correlation comes out at 0.39, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.09 versus 0.39 over 3 years. The 5-year figure is 0.49, and annualized covariance runs at 161.8 %².
QQQ is close to the least connected end of DCI's tracked universe, ranking #11 of 15. The trailing year gives QQQ the advantage: +14.0% versus +26.3%, a 12.3-point spread.
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.
DCI vs QQQ: side by side
| DCI (Donaldson Company, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +14.0% | +26.3% |
| 5-year return | +44.4% | +95.4% |
| Volatility (ann.) | 21.0% | 19.6% |
| Beta vs S&P 500 | 0.74 | 1.28 |
| Max drawdown (3Y) | -26.0% | -22.8% |
| Market cap | – | – |
| P/E (trailing) | 24.8 | – |
| Dividend yield | 1.30% | 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 | DCI | QQQ |
|---|---|---|
| 2022 | +1.0% | -32.6% |
| 2023 | +12.8% | +54.9% |
| 2024 | +4.6% | +25.6% |
| 2025 | +33.7% | +20.8% |
| 2026 | +5.3% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DCI and QQQ good diversifiers for each other?
Reasonably. At 0.39, DCI and QQQ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between DCI and QQQ?
Using weekly returns as of 2026-08-27: 0.39 over 3 years, with 0.09 over the last year and 0.49 over 5 years.
Is QQQ a good diversifier for DCI?
Reasonably. At 0.39, DCI and QQQ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.39 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.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/dci-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/dci-vs-qqq/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: DCI correlations · QQQ correlations
