BALL vs ERNA: Correlation
Ball Corporation (BALL) and Ernexa Therapeutics Inc. (ERNA) show a negative relationship: their 3-year correlation of weekly returns is -0.21.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BALL and ERNA?
Across a 3-year window, the weekly returns of BALL and ERNA correlate at -0.21, negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.47) than the 3-year average (-0.21). Stretching to 5 years gives -0.07, with an annualized covariance of -744.0 %².
Out of 41 assets tracked against BALL, ERNA lands near the bottom at #38. The last year tells two different stories: BALL led by 109.3 percentage points, +22.9% for BALL against -86.4% for ERNA. Risk is not evenly split, since ERNA carries 4.9 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.
BALL vs ERNA: side by side
| BALL (Ball Corporation) | ERNA (Ernexa Therapeutics Inc.) | |
|---|---|---|
| 1-year return | +22.9% | -86.4% |
| 5-year return | -29.3% | -100.0% |
| Volatility (ann.) | 26.9% | 131.2% |
| Beta vs S&P 500 | 0.43 | 1.62 |
| Max drawdown (3Y) | -35.6% | -99.7% |
| Market cap | $16.8B | – |
| P/E (trailing) | 18.4 | – |
| Dividend yield | 1.25% | 0.00% |
| Sector / category | Materials | US Listed |
Year-by-year returns
| Year | BALL | ERNA |
|---|---|---|
| 2022 | -46.2% | -96.1% |
| 2023 | +14.1% | -44.1% |
| 2024 | -3.0% | -83.9% |
| 2025 | -2.4% | -72.4% |
| 2026 | +20.4% | -84.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BALL and ERNA good diversifiers for each other?
By historical standards, yes. A correlation of -0.21 means the two rarely move for the same reasons.
FAQ
What is the correlation between BALL and ERNA?
The BALL/ERNA correlation stands at -0.21 on a 3-year window (1 year: -0.47, 5 years: -0.07), computed from weekly returns as of 2026-08-27.
Is ERNA a good diversifier for BALL?
By historical standards, yes. A correlation of -0.21 means the two rarely move for the same reasons.
What does a correlation of -0.21 mean?
On the −1 to +1 scale, -0.21 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/ball-vs-erna.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ball-vs-erna/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BALL correlations · ERNA correlations
