DOO vs EFOI: Correlation
Measured on weekly returns over the past three years, BRP Inc. - Common Subordinate Voting Shares (DOO) and Energy Focus, Inc. (EFOI) carry a correlation of -0.27, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DOO and EFOI?
On 3 years of weekly data the DOO/EFOI correlation comes out at -0.27, negative, meaning they tend to move in opposite directions. The link has loosened recently: the 1-year correlation (-0.53) runs below the 3-year figure (-0.27). The 5-year figure is -0.20, and annualized covariance runs at -1754.3 %².
Out of 11 assets tracked against DOO, EFOI lands near the bottom at #11. Twelve-month performance is nearly a tie, at +10.0% for DOO and +13.2% for EFOI. One caveat on sizing: EFOI is 3.8 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.
DOO vs EFOI: side by side
| DOO (BRP Inc. - Common Subordinate Voting Shares) | EFOI (Energy Focus, Inc.) | |
|---|---|---|
| 1-year return | +10.0% | +13.2% |
| 5-year return | -24.2% | -87.5% |
| Volatility (ann.) | 41.6% | 158.7% |
| Beta vs S&P 500 | 0.66 | 1.96 |
| Max drawdown (3Y) | -58.9% | -58.2% |
| Market cap | $4.6B | – |
| P/E (trailing) | 20.0 | – |
| Dividend yield | 1.49% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | DOO | EFOI |
|---|---|---|
| 2022 | -12.3% | -92.5% |
| 2023 | -5.4% | -32.6% |
| 2024 | -28.3% | -21.2% |
| 2025 | +40.8% | +94.1% |
| 2026 | -11.8% | +25.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DOO and EFOI good diversifiers for each other?
Yes. With a correlation of -0.27, DOO and EFOI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between DOO and EFOI?
As of 2026-08-27, the correlation of weekly returns between DOO and EFOI is -0.27 over 3 years, -0.53 over 1 year and -0.20 over 5 years.
Is EFOI a good diversifier for DOO?
Yes. With a correlation of -0.27, DOO and EFOI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.27 mean?
A reading of -0.27 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/doo-vs-efoi.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/doo-vs-efoi/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: DOO correlations · EFOI correlations
