CISS vs SXTC: Correlation
C3is Inc. (CISS) and China SXT Pharmaceuticals, Inc. - Class A (SXTC) show a very strong relationship: their 3-year correlation of weekly returns is 0.89.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CISS and SXTC?
Over the past 3 years, CISS and SXTC moved with a correlation of 0.89, which is very strong, meaning they move nearly in lockstep. Little has changed lately, as the 1-year reading of 0.89 lands near the 3-year figure. Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is 12998201.0 %².
In CISS's tracked universe of 42 assets, SXTC sits right near the top at #3. Neither side won the trailing year by much: -99.5% against -98.4%. Note the risk asymmetry: SXTC runs 3.3 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 SXTC: side by side
| CISS (C3is Inc.) | SXTC (China SXT Pharmaceuticals, Inc. - Class A) | |
|---|---|---|
| 1-year return | -99.5% | -98.4% |
| 5-year return | n/a | -99.9% |
| Volatility (ann.) | 2098.5% | 6970.7% |
| Beta vs S&P 500 | 2.24 | 6.97 |
| Max drawdown (3Y) | -100.0% | -100.0% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CISS | SXTC |
|---|---|---|
| 2022 | – | -16.6% |
| 2023 | – | -70.7% |
| 2024 | -98.9% | -87.2% |
| 2025 | -97.3% | +215.0% |
| 2026 | -93.4% | -98.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CISS and SXTC good diversifiers for each other?
Not really. At 0.89, the two trade almost as one position, and owning both buys little extra protection.
FAQ
What is the correlation between CISS and SXTC?
Using weekly returns as of 2026-08-27: 0.89 over 3 years, with 0.89 over the last year and n/a over 5 years.
Is SXTC a good diversifier for CISS?
Not really. At 0.89, the two trade almost as one position, and owning both buys little extra protection.
What does a correlation of 0.89 mean?
On the −1 to +1 scale, 0.89 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ciss-vs-sxtc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ciss-vs-sxtc/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CISS correlations · SXTC correlations
