COFS vs QQQ: Correlation
How closely do ChoiceOne Financial Services, Inc. (COFS) and Invesco QQQ Trust (QQQ) trade together? Their weekly returns over three years give a correlation of 0.21, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COFS and QQQ?
Across a 3-year window, the weekly returns of COFS and QQQ correlate at 0.21, weak. Recent behaviour matches the longer record: 0.17 over 1 year against 0.21 over 3. Stretching to 5 years gives 0.18, with an annualized covariance of 150.5 %².
Out of 12 assets tracked against COFS, QQQ lands near the bottom at #9. Their recent paths diverged sharply: over the last 12 months QQQ outperformed by 15.6 percentage points (+10.7% for COFS against +26.3% for QQQ). One caveat on sizing: COFS is 1.9 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.
COFS vs QQQ: side by side
| COFS (ChoiceOne Financial Services, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +10.7% | +26.3% |
| 5-year return | +66.4% | +95.4% |
| Volatility (ann.) | 36.3% | 19.6% |
| Beta vs S&P 500 | 0.84 | 1.28 |
| Max drawdown (3Y) | -34.9% | -22.8% |
| Market cap | $0.5B | – |
| P/E (trailing) | 8.8 | – |
| Dividend yield | 3.43% | 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 | COFS | QQQ |
|---|---|---|
| 2022 | +14.4% | -32.6% |
| 2023 | +5.3% | +54.9% |
| 2024 | +26.3% | +25.6% |
| 2025 | -14.0% | +20.8% |
| 2026 | +14.8% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COFS and QQQ good diversifiers for each other?
Reasonably. At 0.21, COFS and QQQ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between COFS and QQQ?
The COFS/QQQ correlation stands at 0.21 on a 3-year window (1 year: 0.17, 5 years: 0.18), computed from weekly returns as of 2026-08-27.
Is QQQ a good diversifier for COFS?
Reasonably. At 0.21, COFS and QQQ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.21 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/cofs-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/cofs-vs-qqq/)
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Related comparisons
Hubs: COFS correlations · QQQ correlations
