PMCB vs WRB: Correlation
Measured on weekly returns over the past three years, PharmaCyte Biotech, Inc. (PMCB) and W. R. Berkley Corporation (WRB) carry a correlation of -0.32, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PMCB and WRB?
Across a 3-year window, the weekly returns of PMCB and WRB correlate at -0.32, negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.54 versus -0.32 over 3 years. Stretching to 5 years gives -0.22, with an annualized covariance of -445.8 %².
Among the 10 assets we track against PMCB, WRB sits near the bottom by co-movement, at rank #10. Correlation aside, the last 12 months split them widely, with WRB ahead by 42.3 points (-44.3% versus -2.0%). One caveat on sizing: PMCB is 2.8 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.
PMCB vs WRB: side by side
| PMCB (PharmaCyte Biotech, Inc.) | WRB (W. R. Berkley Corporation) | |
|---|---|---|
| 1-year return | -44.3% | -2.0% |
| 5-year return | -83.6% | +130.5% |
| Volatility (ann.) | 62.1% | 22.5% |
| Beta vs S&P 500 | 0.92 | 0.19 |
| Max drawdown (3Y) | -80.3% | -17.6% |
| Market cap | – | $25.4B |
| P/E (trailing) | – | 14.1 |
| Dividend yield | 0.00% | 0.54% |
| Sector / category | US Listed | Financials |
Year-by-year returns
| Year | PMCB | WRB |
|---|---|---|
| 2022 | +17.2% | +33.9% |
| 2023 | -26.3% | +0.2% |
| 2024 | -27.3% | +27.2% |
| 2025 | -53.9% | +23.0% |
| 2026 | -25.4% | -1.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PMCB and WRB good diversifiers for each other?
Yes. With a correlation of -0.32, PMCB and WRB have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between PMCB and WRB?
Using weekly returns as of 2026-08-27: -0.32 over 3 years, with -0.54 over the last year and -0.22 over 5 years.
Is WRB a good diversifier for PMCB?
Yes. With a correlation of -0.32, PMCB and WRB have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.32 mean?
On the −1 to +1 scale, -0.32 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
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Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/pmcb-vs-wrb/)
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Related comparisons
Hubs: PMCB correlations · WRB correlations
