PROK vs SRFM: Correlation
ProKidney Corp. - Class A (PROK) and Surf Air Mobility Inc. (SRFM) show a moderate relationship: their 3-year correlation of weekly returns is 0.49.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PROK and SRFM?
Across a 3-year window, the weekly returns of PROK and SRFM correlate at 0.49, moderate. The relationship has been stable: the 1-year correlation (0.52) sits close to the 3-year figure. Stretching to 5 years gives n/a, with an annualized covariance of 26897.5 %².
By 3-year correlation, SRFM places #9 of the 21 assets tracked against PROK. Their recent paths diverged sharply: over the last 12 months PROK outperformed by 57.0 percentage points (-26.9% for PROK against -83.9% for SRFM). Risk is not evenly split, since PROK carries 2.4 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 SRFM: side by side
| PROK (ProKidney Corp. - Class A) | SRFM (Surf Air Mobility Inc.) | |
|---|---|---|
| 1-year return | -26.9% | -83.9% |
| 5-year return | -81.3% | n/a |
| Volatility (ann.) | 368.1% | 150.4% |
| Beta vs S&P 500 | 2.21 | 3.45 |
| Max drawdown (3Y) | -94.3% | -96.2% |
| Market cap | $0.7B | $0.1B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PROK | SRFM |
|---|---|---|
| 2022 | -30.7% | – |
| 2023 | -74.1% | – |
| 2024 | -5.1% | -50.3% |
| 2025 | +32.5% | -64.0% |
| 2026 | -18.7% | -62.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PROK and SRFM good diversifiers for each other?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between PROK and SRFM?
As of 2026-08-27, the correlation of weekly returns between PROK and SRFM is 0.49 over 3 years, 0.52 over 1 year and n/a over 5 years.
Is SRFM a good diversifier for PROK?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.49 mean?
A reading of 0.49 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: PROK correlations · SRFM correlations
