ERNA vs ZTS: Correlation
How closely do Ernexa Therapeutics Inc. (ERNA) and Zoetis (ZTS) trade together? Their weekly returns over three years give a correlation of -0.33, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ERNA and ZTS?
On 3 years of weekly data the ERNA/ZTS correlation comes out at -0.33, negative, meaning they tend to move in opposite directions. The link has loosened recently: the 1-year correlation (-0.55) runs below the 3-year figure (-0.33). The 5-year figure is -0.13, and annualized covariance runs at -1302.3 %².
ZTS is close to the least connected end of ERNA's tracked universe, ranking #14 of 14. The last year tells two different stories: ZTS led by 35.6 percentage points, -86.4% for ERNA against -50.8% for ZTS. Note the risk asymmetry: ERNA runs 4.4 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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 ZTS: side by side
| ERNA (Ernexa Therapeutics Inc.) | ZTS (Zoetis) | |
|---|---|---|
| 1-year return | -86.4% | -50.8% |
| 5-year return | -100.0% | -61.5% |
| Volatility (ann.) | 131.2% | 30.1% |
| Beta vs S&P 500 | 1.62 | 0.51 |
| Max drawdown (3Y) | -99.7% | -63.0% |
| Market cap | – | $31.0B |
| P/E (trailing) | – | 12.7 |
| Dividend yield | 0.00% | 2.66% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | ERNA | ZTS |
|---|---|---|
| 2022 | -96.1% | -39.5% |
| 2023 | -44.1% | +35.9% |
| 2024 | -83.9% | -16.6% |
| 2025 | -72.4% | -21.8% |
| 2026 | -84.2% | -39.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ERNA and ZTS good diversifiers for each other?
Yes. With a correlation of -0.33, ERNA and ZTS have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between ERNA and ZTS?
The ERNA/ZTS correlation stands at -0.33 on a 3-year window (1 year: -0.55, 5 years: -0.13), computed from weekly returns as of 2026-08-27.
Is ZTS a good diversifier for ERNA?
Yes. With a correlation of -0.33, ERNA and ZTS have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.33 mean?
A reading of -0.33 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/erna-vs-zts.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/erna-vs-zts/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: ERNA correlations · ZTS correlations
