CAR vs EFOI: Correlation
Avis Budget Group, Inc. (CAR) and Energy Focus, Inc. (EFOI) show a moderate relationship: their 3-year correlation of weekly returns is 0.44.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CAR and EFOI?
Across a 3-year window, the weekly returns of CAR and EFOI correlate at 0.44, moderate. Lately the two have moved closer together, with the 1-year correlation at 0.55 versus 0.44 over 3 years. Stretching to 5 years gives 0.28, with an annualized covariance of 6195.9 %².
Within CAR's tracked universe of 10 assets, EFOI comes in at #4 by 3-year correlation. The last year tells two different stories: EFOI led by 24.3 percentage points, -11.1% for CAR against +13.2% for EFOI. One caveat on sizing: EFOI is 1.8 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.
CAR vs EFOI: side by side
| CAR (Avis Budget Group, Inc.) | EFOI (Energy Focus, Inc.) | |
|---|---|---|
| 1-year return | -11.1% | +13.2% |
| 5-year return | +63.5% | -87.5% |
| Volatility (ann.) | 89.7% | 158.7% |
| Beta vs S&P 500 | 1.84 | 1.96 |
| Max drawdown (3Y) | -80.8% | -58.2% |
| Market cap | $4.9B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CAR | EFOI |
|---|---|---|
| 2022 | -20.9% | -92.5% |
| 2023 | +13.8% | -32.6% |
| 2024 | -54.5% | -21.2% |
| 2025 | +59.2% | +94.1% |
| 2026 | +8.7% | +25.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CAR and EFOI good diversifiers for each other?
Reasonably. At 0.44, CAR and EFOI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between CAR and EFOI?
As of 2026-08-27, the correlation of weekly returns between CAR and EFOI is 0.44 over 3 years, 0.55 over 1 year and 0.28 over 5 years.
Is EFOI a good diversifier for CAR?
Reasonably. At 0.44, CAR and EFOI keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.44 mean?
A reading of 0.44 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/car-vs-efoi.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/car-vs-efoi/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: CAR correlations · EFOI correlations
