BESS vs STAA: Correlation
Bimergen Energy Corporation (BESS) and STAAR Surgical Company (STAA) show a negative relationship: their 3-year correlation of weekly returns is -0.28.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BESS and STAA?
Over the past 3 years, BESS and STAA moved with a correlation of -0.28, which is negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (0.21) runs above the 3-year figure (-0.28). Over 5 years the correlation is -0.21, and the annualized covariance of weekly returns is -88510.9 %².
Within BESS's tracked universe of 51 assets, STAA comes in at #40 by 3-year correlation. Correlation aside, the last 12 months split them widely, with STAA ahead by 31.8 points (-50.4% versus -18.6%). Risk is not evenly split, since BESS carries 83.0 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.
BESS vs STAA: side by side
| BESS (Bimergen Energy Corporation) | STAA (STAAR Surgical Company) | |
|---|---|---|
| 1-year return | -50.4% | -18.6% |
| 5-year return | -87.7% | -85.0% |
| Volatility (ann.) | 5140.2% | 61.9% |
| Beta vs S&P 500 | 17.01 | 0.90 |
| Max drawdown (3Y) | -99.5% | -71.1% |
| Market cap | – | $1.1B |
| P/E (trailing) | – | 279.9 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BESS | STAA |
|---|---|---|
| 2022 | -30.0% | -46.8% |
| 2023 | -14.3% | -35.7% |
| 2024 | +16.7% | -22.2% |
| 2025 | +7.1% | -4.9% |
| 2026 | -70.5% | -3.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BESS and STAA good diversifiers for each other?
By historical standards, yes. A correlation of -0.28 means the two rarely move for the same reasons.
FAQ
What is the correlation between BESS and STAA?
As of 2026-08-27, the correlation of weekly returns between BESS and STAA is -0.28 over 3 years, 0.21 over 1 year and -0.21 over 5 years.
Is STAA a good diversifier for BESS?
By historical standards, yes. A correlation of -0.28 means the two rarely move for the same reasons.
What does a correlation of -0.28 mean?
A reading of -0.28 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/bess-vs-staa.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bess-vs-staa/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BESS correlations · STAA correlations
