PROK vs WKHS: Correlation
ProKidney Corp. - Class A (PROK) and Workhorse Group, Inc. (WKHS) show a strong relationship: their 3-year correlation of weekly returns is 0.78.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PROK and WKHS?
Over the past 3 years, PROK and WKHS moved with a correlation of 0.78, which is strong. The link has loosened recently: the 1-year correlation (0.18) runs below the 3-year figure (0.78). Over 5 years the correlation is 0.72, and the annualized covariance of weekly returns is 45452.9 %².
WKHS is one of the assets that tracks PROK most closely: it ranks #2 out of the 21 assets we track against PROK. Their recent paths diverged sharply: over the last 12 months PROK outperformed by 53.7 percentage points (-26.9% for PROK against -80.6% for WKHS). One caveat on sizing: PROK is 2.3 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.
PROK vs WKHS: side by side
| PROK (ProKidney Corp. - Class A) | WKHS (Workhorse Group, Inc.) | |
|---|---|---|
| 1-year return | -26.9% | -80.6% |
| 5-year return | -81.3% | -100.0% |
| Volatility (ann.) | 368.1% | 157.8% |
| Beta vs S&P 500 | 2.21 | 1.44 |
| Max drawdown (3Y) | -94.3% | -99.9% |
| Market cap | $0.7B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PROK | WKHS |
|---|---|---|
| 2022 | -30.7% | -65.1% |
| 2023 | -74.1% | -76.3% |
| 2024 | -5.1% | -90.3% |
| 2025 | +32.5% | -95.1% |
| 2026 | -18.7% | -37.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PROK and WKHS good diversifiers for each other?
To a limited degree. At 0.78 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between PROK and WKHS?
The PROK/WKHS correlation stands at 0.78 on a 3-year window (1 year: 0.18, 5 years: 0.72), computed from weekly returns as of 2026-08-27.
Is WKHS a good diversifier for PROK?
To a limited degree. At 0.78 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.78 mean?
A reading of 0.78 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/prok-vs-wkhs.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/prok-vs-wkhs/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PROK correlations · WKHS correlations
