ACFN vs ALTO: Correlation
How closely do Acorn Energy, Inc. (ACFN) and Alto Ingredients, Inc. (ALTO) trade together? Their weekly returns over three years give a correlation of -0.28, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACFN and ALTO?
On 3 years of weekly data the ACFN/ALTO correlation comes out at -0.28, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.28 lands near the 3-year figure. The 5-year figure is -0.22, and annualized covariance runs at -2095.3 %².
ALTO is close to the least connected end of ACFN's tracked universe, ranking #14 of 14. Their recent paths diverged sharply: over the last 12 months ALTO outperformed by 316.5 percentage points (-27.0% for ACFN against +289.5% for ALTO).
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.
ACFN vs ALTO: side by side
| ACFN (Acorn Energy, Inc.) | ALTO (Alto Ingredients, Inc.) | |
|---|---|---|
| 1-year return | -27.0% | +289.5% |
| 5-year return | +122.5% | -16.4% |
| Volatility (ann.) | 81.3% | 93.7% |
| Beta vs S&P 500 | 0.68 | 0.15 |
| Max drawdown (3Y) | -58.1% | -84.1% |
| Market cap | $0.1B | $0.3B |
| P/E (trailing) | 33.9 | 6.1 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACFN | ALTO |
|---|---|---|
| 2022 | -44.4% | -40.1% |
| 2023 | +8.8% | -7.6% |
| 2024 | +193.8% | -41.4% |
| 2025 | -15.6% | +84.6% |
| 2026 | +36.8% | +42.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACFN and ALTO good diversifiers for each other?
Yes. With a correlation of -0.28, ACFN and ALTO have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between ACFN and ALTO?
As of 2026-08-27, the correlation of weekly returns between ACFN and ALTO is -0.28 over 3 years, -0.28 over 1 year and -0.22 over 5 years.
Is ALTO a good diversifier for ACFN?
Yes. With a correlation of -0.28, ACFN and ALTO have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.28 mean?
On the −1 to +1 scale, -0.28 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/acfn-vs-alto.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/acfn-vs-alto/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ACFN correlations · ALTO correlations
