BMRA vs NATH: Correlation
Measured on weekly returns over the past three years, Biomerica, Inc. (BMRA) and Nathan's Famous, Inc. (NATH) carry a correlation of 0.36, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BMRA and NATH?
Across a 3-year window, the weekly returns of BMRA and NATH correlate at 0.36, moderate. The past 12 months show a weaker link (0.02) than the 3-year average (0.36). Stretching to 5 years gives 0.24, with an annualized covariance of 885.2 %².
NATH is one of the assets that tracks BMRA most closely: it ranks #2 out of the 10 assets we track against BMRA. The last year tells two different stories: NATH led by 27.8 percentage points, -33.3% for BMRA against -5.5% for NATH. One caveat on sizing: BMRA is 3.9 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.
BMRA vs NATH: side by side
| BMRA (Biomerica, Inc.) | NATH (Nathan's Famous, Inc.) | |
|---|---|---|
| 1-year return | -33.3% | -5.5% |
| 5-year return | -94.0% | +68.7% |
| Volatility (ann.) | 97.9% | 25.3% |
| Beta vs S&P 500 | 1.49 | 0.50 |
| Max drawdown (3Y) | -88.7% | -19.5% |
| Market cap | – | $0.4B |
| P/E (trailing) | – | 20.2 |
| Dividend yield | 0.00% | 2.05% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BMRA | NATH |
|---|---|---|
| 2022 | -13.9% | +18.7% |
| 2023 | -62.7% | +19.2% |
| 2024 | -76.0% | +3.5% |
| 2025 | +5.0% | +24.6% |
| 2026 | -16.7% | +5.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BMRA and NATH good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.36 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BMRA and NATH?
The BMRA/NATH correlation stands at 0.36 on a 3-year window (1 year: 0.02, 5 years: 0.24), computed from weekly returns as of 2026-08-27.
Is NATH a good diversifier for BMRA?
Yes, to a useful degree: a correlation of 0.36 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.36 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bmra-vs-nath.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bmra-vs-nath/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BMRA correlations · NATH correlations
