BZAI vs CISS: Correlation
How closely do Blaize Holdings, Inc. (BZAI) and C3is Inc. (CISS) 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 BZAI and CISS?
Over the past 3 years, BZAI and CISS moved with a correlation of -0.28, which is negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.37 lands near the 3-year figure. Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is -56358.9 %².
CISS is close to the least connected end of BZAI's tracked universe, ranking #16 of 16. Over the last 12 months BZAI came out ahead by 12.2 percentage points (-87.3% against -99.5%). One caveat on sizing: CISS is 21.6 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
BZAI vs CISS: side by side
| BZAI (Blaize Holdings, Inc.) | CISS (C3is Inc.) | |
|---|---|---|
| 1-year return | -87.3% | -99.5% |
| 5-year return | -94.8% | n/a |
| Volatility (ann.) | 97.0% | 2098.5% |
| Beta vs S&P 500 | 0.55 | 2.24 |
| Max drawdown (3Y) | -97.0% | -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 | BZAI | CISS |
|---|---|---|
| 2023 | +5.6% | – |
| 2024 | +39.8% | -98.9% |
| 2025 | -87.0% | -97.3% |
| 2026 | -73.8% | -93.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BZAI and CISS good diversifiers for each other?
Yes. With a correlation of -0.28, BZAI and CISS have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BZAI and CISS?
As of 2026-08-27, the correlation of weekly returns between BZAI and CISS is -0.28 over 3 years, -0.37 over 1 year and n/a over 5 years.
Is CISS a good diversifier for BZAI?
Yes. With a correlation of -0.28, BZAI and CISS have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.28 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
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[](https://www.pairbook.io/pair/bzai-vs-ciss/)
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Related comparisons
Hubs: BZAI correlations · CISS correlations
