BESS vs WTM: Correlation
How closely do Bimergen Energy Corporation (BESS) and White Mountains Insurance Group, Ltd. (WTM) trade together? Their weekly returns over three years give a correlation of -0.23, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BESS and WTM?
On 3 years of weekly data the BESS/WTM correlation comes out at -0.23, negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at 0.11 versus -0.23 over 3 years. The 5-year figure is -0.17, and annualized covariance runs at -24657.2 %².
Within BESS's tracked universe of 51 assets, WTM comes in at #32 by 3-year correlation. Correlation aside, the last 12 months split them widely, with WTM ahead by 65.7 points (-50.4% versus +15.3%). One caveat on sizing: BESS is 249.5 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.
BESS vs WTM: side by side
| BESS (Bimergen Energy Corporation) | WTM (White Mountains Insurance Group, Ltd.) | |
|---|---|---|
| 1-year return | -50.4% | +15.3% |
| 5-year return | -87.7% | +90.5% |
| Volatility (ann.) | 5140.2% | 20.6% |
| Beta vs S&P 500 | 17.01 | 0.23 |
| Max drawdown (3Y) | -99.5% | -18.0% |
| Market cap | – | $5.1B |
| P/E (trailing) | – | 4.9 |
| Dividend yield | 0.00% | 0.05% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BESS | WTM |
|---|---|---|
| 2022 | -30.0% | +39.6% |
| 2023 | -14.3% | +6.5% |
| 2024 | +16.7% | +29.3% |
| 2025 | +7.1% | +6.9% |
| 2026 | -70.5% | +2.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BESS and WTM good diversifiers for each other?
Yes. With a correlation of -0.23, BESS and WTM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BESS and WTM?
As of 2026-08-27, the correlation of weekly returns between BESS and WTM is -0.23 over 3 years, 0.11 over 1 year and -0.17 over 5 years.
Is WTM a good diversifier for BESS?
Yes. With a correlation of -0.23, BESS and WTM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.23 mean?
A reading of -0.23 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
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Related comparisons
Hubs: BESS correlations · WTM correlations
