BTU vs WDFC: Correlation
How closely do Peabody Energy Corporation (BTU) and WD-40 Company (WDFC) trade together? Their weekly returns over three years give a correlation of -0.20, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BTU and WDFC?
Across a 3-year window, the weekly returns of BTU and WDFC correlate at -0.20, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.19 lands near the 3-year figure. Stretching to 5 years gives -0.02, with an annualized covariance of -289.8 %².
WDFC is close to the least connected end of BTU's tracked universe, ranking #8 of 10. Correlation aside, the last 12 months split them widely, with BTU ahead by 76.9 points (+77.6% versus +0.7%). Risk is not evenly split, since BTU carries 1.9 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.
BTU vs WDFC: side by side
| BTU (Peabody Energy Corporation) | WDFC (WD-40 Company) | |
|---|---|---|
| 1-year return | +77.6% | +0.7% |
| 5-year return | +95.9% | +0.9% |
| Volatility (ann.) | 52.8% | 27.6% |
| Beta vs S&P 500 | 0.73 | 0.18 |
| Max drawdown (3Y) | -65.1% | -34.2% |
| Market cap | $3.6B | $2.9B |
| P/E (trailing) | – | 33.3 |
| Dividend yield | 1.10% | 1.85% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BTU | WDFC |
|---|---|---|
| 2022 | +162.4% | -33.0% |
| 2023 | -7.0% | +50.9% |
| 2024 | -12.8% | +2.9% |
| 2025 | +44.2% | -17.4% |
| 2026 | -0.0% | +12.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BTU and WDFC good diversifiers for each other?
Yes. With a correlation of -0.20, BTU and WDFC have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BTU and WDFC?
Using weekly returns as of 2026-08-27: -0.20 over 3 years, with -0.19 over the last year and -0.02 over 5 years.
Is WDFC a good diversifier for BTU?
Yes. With a correlation of -0.20, BTU and WDFC have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.20 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/btu-vs-wdfc.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/btu-vs-wdfc/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BTU correlations · WDFC correlations
