METCB vs PROK: Correlation
Measured on weekly returns over the past three years, Ramaco Resources, Inc. (METCB) and ProKidney Corp. - Class A (PROK) carry a correlation of 0.44, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are METCB and PROK?
On 3 years of weekly data the METCB/PROK correlation comes out at 0.44, moderate. Lately the two have drifted apart, with the 1-year correlation at -0.03 versus 0.44 over 3 years. The 5-year figure is n/a, and annualized covariance runs at 9537.9 %².
In METCB's tracked universe of 11 assets, PROK sits right near the top at #3. The last year tells two different stories: PROK led by 26.1 percentage points, -53.0% for METCB against -26.9% for PROK. One caveat on sizing: PROK is 6.2 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.
METCB vs PROK: side by side
| METCB (Ramaco Resources, Inc.) | PROK (ProKidney Corp. - Class A) | |
|---|---|---|
| 1-year return | -53.0% | -26.9% |
| 5-year return | n/a | -81.3% |
| Volatility (ann.) | 59.3% | 368.1% |
| Beta vs S&P 500 | 0.57 | 2.21 |
| Max drawdown (3Y) | -71.4% | -94.3% |
| Market cap | $0.5B | $0.7B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | METCB | PROK |
|---|---|---|
| 2022 | – | -30.7% |
| 2023 | – | -74.1% |
| 2024 | -17.4% | -5.1% |
| 2025 | +25.9% | +32.5% |
| 2026 | -34.6% | -18.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are METCB and PROK good diversifiers for each other?
Reasonably. At 0.44, METCB and PROK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between METCB and PROK?
Using weekly returns as of 2026-08-27: 0.44 over 3 years, with -0.03 over the last year and n/a over 5 years.
Is PROK a good diversifier for METCB?
Reasonably. At 0.44, METCB and PROK keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.44 mean?
A reading of 0.44 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/metcb-vs-prok.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/metcb-vs-prok/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: METCB correlations · PROK correlations
