PLOW vs QQQ: Correlation
Measured on weekly returns over the past three years, Douglas Dynamics, Inc. (PLOW) and Invesco QQQ Trust (QQQ) carry a correlation of 0.14, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PLOW and QQQ?
Across a 3-year window, the weekly returns of PLOW and QQQ correlate at 0.14, weak. The link has loosened recently: the 1-year correlation (-0.04) runs below the 3-year figure (0.14). Stretching to 5 years gives 0.31, with an annualized covariance of 92.7 %².
Out of 10 assets tracked against PLOW, QQQ lands near the bottom at #7. Their 12-month results are close: +28.2% for PLOW against +26.3% for QQQ. Risk is not evenly split, since PLOW carries 1.7 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.
PLOW vs QQQ: side by side
| PLOW (Douglas Dynamics, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +28.2% | +26.3% |
| 5-year return | +30.5% | +95.4% |
| Volatility (ann.) | 32.7% | 19.6% |
| Beta vs S&P 500 | 0.55 | 1.28 |
| Max drawdown (3Y) | -29.6% | -22.8% |
| Market cap | $1.0B | – |
| P/E (trailing) | 18.9 | – |
| Dividend yield | 2.83% | 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 | PLOW | QQQ |
|---|---|---|
| 2022 | -4.0% | -32.6% |
| 2023 | -14.7% | +54.9% |
| 2024 | -16.5% | +25.6% |
| 2025 | +43.8% | +20.8% |
| 2026 | +30.9% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PLOW and QQQ good diversifiers for each other?
Yes: at 0.14, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between PLOW and QQQ?
The PLOW/QQQ correlation stands at 0.14 on a 3-year window (1 year: -0.04, 5 years: 0.31), computed from weekly returns as of 2026-08-27.
Is QQQ a good diversifier for PLOW?
Yes: at 0.14, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of 0.14 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
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Related comparisons
Hubs: PLOW correlations · QQQ correlations
