CTSO vs SSM: Correlation
Cytosorbents Corporation (CTSO) and Sono Group N.V. (SSM) show a negative relationship: their 3-year correlation of weekly returns is -0.30.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CTSO and SSM?
Over the past 3 years, CTSO and SSM moved with a correlation of -0.30, which is negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at 0.07 versus -0.30 over 3 years. Over 5 years the correlation is -0.22, and the annualized covariance of weekly returns is -27107.8 %².
Among the 10 assets we track against CTSO, SSM sits near the bottom by co-movement, at rank #10. Over the last 12 months SSM came out ahead by 12.9 percentage points (-63.4% against -50.5%). Note the risk asymmetry: SSM runs 15.9 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.
CTSO vs SSM: side by side
| CTSO (Cytosorbents Corporation) | SSM (Sono Group N.V.) | |
|---|---|---|
| 1-year return | -63.4% | -50.5% |
| 5-year return | -96.4% | -99.9% |
| Volatility (ann.) | 75.9% | 1204.8% |
| Beta vs S&P 500 | 0.98 | 0.56 |
| Max drawdown (3Y) | -87.9% | -99.4% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CTSO | SSM |
|---|---|---|
| 2022 | -63.0% | -89.8% |
| 2023 | -28.4% | -93.9% |
| 2024 | -18.0% | -16.7% |
| 2025 | -29.8% | +86.7% |
| 2026 | -46.7% | -61.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CTSO and SSM good diversifiers for each other?
By historical standards, yes. A correlation of -0.30 means the two rarely move for the same reasons.
FAQ
What is the correlation between CTSO and SSM?
Using weekly returns as of 2026-08-27: -0.30 over 3 years, with 0.07 over the last year and -0.22 over 5 years.
Is SSM a good diversifier for CTSO?
By historical standards, yes. A correlation of -0.30 means the two rarely move for the same reasons.
What does a correlation of -0.30 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/ctso-vs-ssm.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ctso-vs-ssm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CTSO correlations · SSM correlations
