CASY vs PHGE: Correlation
How closely do Casey's (CASY) and BiomX Inc. (PHGE) trade together? Their weekly returns over three years give a correlation of -0.20, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CASY and PHGE?
Across a 3-year window, the weekly returns of CASY and PHGE correlate at -0.20, negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.30 over 1 year against -0.20 over 3. Stretching to 5 years gives -0.13, with an annualized covariance of -871.7 %².
Within CASY's tracked universe of 30 assets, PHGE comes in at #21 by 3-year correlation. The last year tells two different stories: CASY led by 152.4 percentage points, +53.7% for CASY against -98.7% for PHGE. One caveat on sizing: PHGE is 5.1 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.
CASY vs PHGE: side by side
| CASY (Casey's) | PHGE (BiomX Inc.) | |
|---|---|---|
| 1-year return | +53.7% | -98.7% |
| 5-year return | +284.3% | -100.0% |
| Volatility (ann.) | 28.9% | 147.0% |
| Beta vs S&P 500 | 0.39 | 0.33 |
| Max drawdown (3Y) | -16.6% | -99.9% |
| Market cap | $28.2B | – |
| P/E (trailing) | 42.2 | – |
| Dividend yield | 0.28% | 0.00% |
| Sector / category | Consumer Staples | US Listed |
Year-by-year returns
| Year | CASY | PHGE |
|---|---|---|
| 2022 | +14.5% | -88.3% |
| 2023 | +23.3% | +49.7% |
| 2024 | +45.0% | -73.9% |
| 2025 | +40.1% | -86.5% |
| 2026 | +38.4% | -92.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CASY and PHGE good diversifiers for each other?
Yes. With a correlation of -0.20, CASY and PHGE have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between CASY and PHGE?
As of 2026-08-27, the correlation of weekly returns between CASY and PHGE is -0.20 over 3 years, -0.30 over 1 year and -0.13 over 5 years.
Is PHGE a good diversifier for CASY?
Yes. With a correlation of -0.20, CASY and PHGE have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.20 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/casy-vs-phge.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/casy-vs-phge/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: CASY correlations · PHGE correlations
