CISS vs STRR: Correlation
How closely do C3is Inc. (CISS) and Star Equity Holdings, Inc. (STRR) trade together? Their weekly returns over three years give a correlation of -0.21, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CISS and STRR?
Over the past 3 years, CISS and STRR moved with a correlation of -0.21, which is negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.35) than the 3-year average (-0.21). Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is -15812.1 %².
Among the 42 assets we track against CISS, STRR ranks #20 by 3-year correlation. Correlation aside, the last 12 months split them widely, with STRR ahead by 107.1 points (-99.5% versus +7.6%). Note the risk asymmetry: CISS runs 59.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
CISS vs STRR: side by side
| CISS (C3is Inc.) | STRR (Star Equity Holdings, Inc.) | |
|---|---|---|
| 1-year return | -99.5% | +7.6% |
| 5-year return | n/a | -38.9% |
| Volatility (ann.) | 2098.5% | 35.1% |
| Beta vs S&P 500 | 2.24 | 0.69 |
| Max drawdown (3Y) | -100.0% | -62.9% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CISS | STRR |
|---|---|---|
| 2022 | – | -22.0% |
| 2023 | – | -31.6% |
| 2024 | -98.9% | -15.8% |
| 2025 | -97.3% | -13.8% |
| 2026 | -93.4% | -9.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CISS and STRR good diversifiers for each other?
By historical standards, yes. A correlation of -0.21 means the two rarely move for the same reasons.
FAQ
What is the correlation between CISS and STRR?
The CISS/STRR correlation stands at -0.21 on a 3-year window (1 year: -0.35, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is STRR a good diversifier for CISS?
By historical standards, yes. A correlation of -0.21 means the two rarely move for the same reasons.
What does a correlation of -0.21 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.
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Related comparisons
Hubs: CISS correlations · STRR correlations
