NDRA vs PROK: Correlation
How closely do ENDRA Life Sciences Inc. (NDRA) and ProKidney Corp. - Class A (PROK) trade together? Their weekly returns over three years give a correlation of 0.50, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NDRA and PROK?
Over the past 3 years, NDRA and PROK moved with a correlation of 0.50, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.13 versus 0.50 over 3 years. Over 5 years the correlation is 0.44, and the annualized covariance of weekly returns is 27681.5 %².
In NDRA's tracked universe of 11 assets, PROK sits right near the top at #2. Their recent paths diverged sharply: over the last 12 months NDRA outperformed by 58.4 percentage points (+31.5% for NDRA against -26.9% for PROK). 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.
NDRA vs PROK: side by side
| NDRA (ENDRA Life Sciences Inc.) | PROK (ProKidney Corp. - Class A) | |
|---|---|---|
| 1-year return | +31.5% | -26.9% |
| 5-year return | -100.0% | -81.3% |
| Volatility (ann.) | 150.8% | 368.1% |
| Beta vs S&P 500 | 1.41 | 2.21 |
| Max drawdown (3Y) | -99.9% | -94.3% |
| Market cap | – | $0.7B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NDRA | PROK |
|---|---|---|
| 2022 | -70.6% | -30.7% |
| 2023 | -47.9% | -74.1% |
| 2024 | -99.8% | -5.1% |
| 2025 | -27.6% | +32.5% |
| 2026 | +19.3% | -18.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NDRA and PROK good diversifiers for each other?
Only partially. A correlation of 0.50 means NDRA and PROK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between NDRA and PROK?
Using weekly returns as of 2026-08-27: 0.50 over 3 years, with 0.13 over the last year and 0.44 over 5 years.
Is PROK a good diversifier for NDRA?
Only partially. A correlation of 0.50 means NDRA and PROK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.50 mean?
A reading of 0.50 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/ndra-vs-prok.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ndra-vs-prok/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: NDRA correlations · PROK correlations
