BRK.B vs WRB: Correlation
Berkshire Hathaway (BRK.B) and W. R. Berkley Corporation (WRB) show a moderate relationship: their 3-year correlation of weekly returns is 0.53.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BRK.B and WRB?
On 3 years of weekly data the BRK.B/WRB correlation comes out at 0.53, moderate. Recent behaviour matches the longer record: 0.46 over 1 year against 0.53 over 3. The 5-year figure is 0.49, and annualized covariance runs at 191.4 %².
By 3-year correlation, WRB places #16 of the 31 assets tracked against BRK.B. Their 12-month results are close: +1.6% for BRK.B against -2.0% for WRB. Across three years, the rolling one-year figure varied moderately, from 0.27 to 0.67.
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.
BRK.B vs WRB: side by side
| BRK.B (Berkshire Hathaway) | WRB (W. R. Berkley Corporation) | |
|---|---|---|
| 1-year return | +1.6% | -2.0% |
| 5-year return | +76.3% | +130.5% |
| Volatility (ann.) | 15.9% | 22.5% |
| Beta vs S&P 500 | 0.43 | 0.19 |
| Max drawdown (3Y) | -14.9% | -17.6% |
| Market cap | $1,078.3B | $25.4B |
| P/E (trailing) | 12.7 | 14.1 |
| Dividend yield | 0.00% | 0.54% |
| Sector / category | Financials | Financials |
Year-by-year returns
| Year | BRK.B | WRB |
|---|---|---|
| 2022 | +3.3% | +33.9% |
| 2023 | +15.5% | +0.2% |
| 2024 | +27.1% | +27.2% |
| 2025 | +10.9% | +23.0% |
| 2026 | +0.2% | -1.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BRK.B and WRB good diversifiers for each other?
To a limited degree. At 0.53 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 BRK.B and WRB?
The BRK.B/WRB correlation stands at 0.53 on a 3-year window (1 year: 0.46, 5 years: 0.49), computed from weekly returns as of 2026-08-27.
Is WRB a good diversifier for BRK.B?
To a limited degree. At 0.53 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 0.53 mean?
On the −1 to +1 scale, 0.53 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
$ curl https://www.pairbook.io/api/v1/pairs/brk-b-vs-wrb.json
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Related comparisons
Hubs: BRK.B correlations · WRB correlations
