ERNA vs SAM: Correlation
How closely do Ernexa Therapeutics Inc. (ERNA) and Boston Beer Company, Inc. (The) (SAM) trade together? Their weekly returns over three years give a correlation of -0.24, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ERNA and SAM?
Across a 3-year window, the weekly returns of ERNA and SAM correlate at -0.24, negative, meaning they tend to move in opposite directions. The link has loosened recently: the 1-year correlation (-0.43) runs below the 3-year figure (-0.24). Stretching to 5 years gives -0.10, with an annualized covariance of -1108.0 %².
Among the 14 assets we track against ERNA, SAM sits near the bottom by co-movement, at rank #11. The last year tells two different stories: SAM led by 68.8 percentage points, -86.4% for ERNA against -17.6% for SAM. One caveat on sizing: ERNA is 3.7 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.
ERNA vs SAM: side by side
| ERNA (Ernexa Therapeutics Inc.) | SAM (Boston Beer Company, Inc. (The)) | |
|---|---|---|
| 1-year return | -86.4% | -17.6% |
| 5-year return | -100.0% | -68.3% |
| Volatility (ann.) | 131.2% | 35.3% |
| Beta vs S&P 500 | 1.62 | 0.21 |
| Max drawdown (3Y) | -99.7% | -59.1% |
| Market cap | – | $1.9B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ERNA | SAM |
|---|---|---|
| 2022 | -96.1% | -34.8% |
| 2023 | -44.1% | +4.9% |
| 2024 | -83.9% | -13.2% |
| 2025 | -72.4% | -35.0% |
| 2026 | -84.2% | -6.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ERNA and SAM good diversifiers for each other?
Yes. With a correlation of -0.24, ERNA and SAM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between ERNA and SAM?
Using weekly returns as of 2026-08-27: -0.24 over 3 years, with -0.43 over the last year and -0.10 over 5 years.
Is SAM a good diversifier for ERNA?
Yes. With a correlation of -0.24, ERNA and SAM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.24 mean?
On the −1 to +1 scale, -0.24 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/erna-vs-sam.json
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Related comparisons
Hubs: ERNA correlations · SAM correlations
