CLFD vs QQQ: Correlation
How closely do Clearfield, Inc. (CLFD) and Invesco QQQ Trust (QQQ) trade together? Their weekly returns over three years give a correlation of 0.40, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CLFD and QQQ?
Over the past 3 years, CLFD and QQQ moved with a correlation of 0.40, which is moderate. Little has changed lately, as the 1-year reading of 0.47 lands near the 3-year figure. Over 5 years the correlation is 0.38, and the annualized covariance of weekly returns is 379.2 %².
By 3-year correlation, QQQ places #7 of the 12 assets tracked against CLFD. Their recent paths diverged sharply: over the last 12 months QQQ outperformed by 34.8 percentage points (-8.5% for CLFD against +26.3% for QQQ). One caveat on sizing: CLFD is 2.5 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.
CLFD vs QQQ: side by side
| CLFD (Clearfield, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | -8.5% | +26.3% |
| 5-year return | -35.2% | +95.4% |
| Volatility (ann.) | 49.0% | 19.6% |
| Beta vs S&P 500 | 1.34 | 1.28 |
| Max drawdown (3Y) | -48.0% | -22.8% |
| Market cap | $0.4B | – |
| P/E (trailing) | 103.3 | – |
| 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 | CLFD | QQQ |
|---|---|---|
| 2022 | +11.5% | -32.6% |
| 2023 | -69.1% | +54.9% |
| 2024 | +6.6% | +25.6% |
| 2025 | -6.0% | +20.8% |
| 2026 | +2.8% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CLFD and QQQ good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.40 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CLFD and QQQ?
The CLFD/QQQ correlation stands at 0.40 on a 3-year window (1 year: 0.47, 5 years: 0.38), computed from weekly returns as of 2026-08-27.
Is QQQ a good diversifier for CLFD?
Yes, to a useful degree: a correlation of 0.40 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.40 mean?
A reading of 0.40 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/clfd-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/clfd-vs-qqq/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CLFD correlations · QQQ correlations
