ACH vs CISS: Correlation
Accendra Health, Inc. (ACH) and C3is Inc. (CISS) show a negative relationship: their 3-year correlation of weekly returns is -0.41.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACH and CISS?
Across a 3-year window, the weekly returns of ACH and CISS correlate at -0.41, negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.60) than the 3-year average (-0.41). Stretching to 5 years gives n/a, with an annualized covariance of -77091.9 %².
CISS is close to the least connected end of ACH's tracked universe, ranking #15 of 16. The last year tells two different stories: ACH led by 24.2 percentage points, -75.3% for ACH against -99.5% for CISS. Note the risk asymmetry: CISS runs 23.6 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.
ACH vs CISS: side by side
| ACH (Accendra Health, Inc.) | CISS (C3is Inc.) | |
|---|---|---|
| 1-year return | -75.3% | -99.5% |
| 5-year return | -96.8% | n/a |
| Volatility (ann.) | 89.1% | 2098.5% |
| Beta vs S&P 500 | 1.37 | 2.24 |
| Max drawdown (3Y) | -96.6% | -100.0% |
| Market cap | $0.1B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACH | CISS |
|---|---|---|
| 2022 | -55.1% | – |
| 2023 | -1.3% | – |
| 2024 | -32.2% | -98.9% |
| 2025 | -78.6% | -97.3% |
| 2026 | -56.8% | -93.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACH and CISS good diversifiers for each other?
Yes: at -0.41, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between ACH and CISS?
The ACH/CISS correlation stands at -0.41 on a 3-year window (1 year: -0.60, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is CISS a good diversifier for ACH?
Yes: at -0.41, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.41 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: ACH correlations · CISS correlations
