BSBK vs CTSO: Correlation
Measured on weekly returns over the past three years, Bogota Financial Corp. (BSBK) and Cytosorbents Corporation (CTSO) carry a correlation of 0.31, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSBK and CTSO?
On 3 years of weekly data the BSBK/CTSO correlation comes out at 0.31, moderate. The link has loosened recently: the 1-year correlation (0.01) runs below the 3-year figure (0.31). The 5-year figure is 0.21, and annualized covariance runs at 505.6 %².
Within BSBK's tracked universe of 14 assets, CTSO comes in at #5 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months BSBK outperformed by 62.3 percentage points (-1.1% for BSBK against -63.4% for CTSO). One caveat on sizing: CTSO is 3.6 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.
BSBK vs CTSO: side by side
| BSBK (Bogota Financial Corp.) | CTSO (Cytosorbents Corporation) | |
|---|---|---|
| 1-year return | -1.1% | -63.4% |
| 5-year return | -12.7% | -96.4% |
| Volatility (ann.) | 21.2% | 75.9% |
| Beta vs S&P 500 | 0.12 | 0.98 |
| Max drawdown (3Y) | -21.6% | -87.9% |
| Market cap | $0.1B | – |
| P/E (trailing) | 43.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BSBK | CTSO |
|---|---|---|
| 2022 | +9.8% | -63.0% |
| 2023 | -28.0% | -28.4% |
| 2024 | -6.8% | -18.0% |
| 2025 | +12.7% | -29.8% |
| 2026 | +7.9% | -46.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSBK and CTSO good diversifiers for each other?
A fair diversifier. At 0.31, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between BSBK and CTSO?
As of 2026-08-27, the correlation of weekly returns between BSBK and CTSO is 0.31 over 3 years, 0.01 over 1 year and 0.21 over 5 years.
Is CTSO a good diversifier for BSBK?
A fair diversifier. At 0.31, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.31 mean?
A reading of 0.31 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bsbk-vs-ctso.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bsbk-vs-ctso/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BSBK correlations · CTSO correlations
