PROK vs SABS: Correlation
ProKidney Corp. - Class A (PROK) and SAB Biotherapeutics, Inc. (SABS) show a moderate relationship: their 3-year correlation of weekly returns is 0.35.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PROK and SABS?
Across a 3-year window, the weekly returns of PROK and SABS correlate at 0.35, moderate. The relationship has been stable: the 1-year correlation (0.25) sits close to the 3-year figure. Stretching to 5 years gives 0.25, with an annualized covariance of 11098.8 %².
By 3-year correlation, SABS places #14 of the 21 assets tracked against PROK. Correlation aside, the last 12 months split them widely, with SABS ahead by 112.3 points (-26.9% versus +85.4%). Risk is not evenly split, since PROK carries 4.2 times the volatility of the other side.
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.
PROK vs SABS: side by side
| PROK (ProKidney Corp. - Class A) | SABS (SAB Biotherapeutics, Inc.) | |
|---|---|---|
| 1-year return | -26.9% | +85.4% |
| 5-year return | -81.3% | -96.1% |
| Volatility (ann.) | 368.1% | 86.9% |
| Beta vs S&P 500 | 2.21 | 0.67 |
| Max drawdown (3Y) | -94.3% | -89.0% |
| Market cap | $0.7B | $0.4B |
| P/E (trailing) | – | 16.4 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PROK | SABS |
|---|---|---|
| 2022 | -30.7% | -92.4% |
| 2023 | -74.1% | +16.6% |
| 2024 | -5.1% | -44.9% |
| 2025 | +32.5% | -1.4% |
| 2026 | -18.7% | +5.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PROK and SABS good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.35 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between PROK and SABS?
Using weekly returns as of 2026-08-27: 0.35 over 3 years, with 0.25 over the last year and 0.25 over 5 years.
Is SABS a good diversifier for PROK?
Yes, to a useful degree: a correlation of 0.35 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.35 mean?
On the −1 to +1 scale, 0.35 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/prok-vs-sabs.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/prok-vs-sabs/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: PROK correlations · SABS correlations
