ACFN vs CSIQ: Correlation
Acorn Energy, Inc. (ACFN) and Canadian Solar Inc. (CSIQ) show a negative relationship: their 3-year correlation of weekly returns is -0.23.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACFN and CSIQ?
On 3 years of weekly data the ACFN/CSIQ correlation comes out at -0.23, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.33 lands near the 3-year figure. The 5-year figure is -0.18, and annualized covariance runs at -1505.5 %².
Among the 14 assets we track against ACFN, CSIQ sits near the bottom by co-movement, at rank #12. Correlation aside, the last 12 months split them widely, with CSIQ ahead by 62.2 points (-27.0% versus +35.2%).
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 CSIQ: side by side
| ACFN (Acorn Energy, Inc.) | CSIQ (Canadian Solar Inc.) | |
|---|---|---|
| 1-year return | -27.0% | +35.2% |
| 5-year return | +122.5% | -62.6% |
| Volatility (ann.) | 81.3% | 79.8% |
| Beta vs S&P 500 | 0.68 | 1.82 |
| Max drawdown (3Y) | -58.1% | -76.1% |
| Market cap | $0.1B | $0.9B |
| P/E (trailing) | 33.9 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACFN | CSIQ |
|---|---|---|
| 2022 | -44.4% | -1.2% |
| 2023 | +8.8% | -15.1% |
| 2024 | +193.8% | -57.6% |
| 2025 | -15.6% | +113.8% |
| 2026 | +36.8% | -41.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACFN and CSIQ good diversifiers for each other?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between ACFN and CSIQ?
As of 2026-08-27, the correlation of weekly returns between ACFN and CSIQ is -0.23 over 3 years, -0.33 over 1 year and -0.18 over 5 years.
Is CSIQ a good diversifier for ACFN?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.23 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/acfn-vs-csiq.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/acfn-vs-csiq/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ACFN correlations · CSIQ correlations
