AMPH vs SHC: Correlation
Measured on weekly returns over the past three years, Amphastar Pharmaceuticals, Inc. (AMPH) and Sotera Health Company (SHC) carry a correlation of 0.48, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AMPH and SHC?
Across a 3-year window, the weekly returns of AMPH and SHC correlate at 0.48, moderate. Recent behaviour matches the longer record: 0.55 over 1 year against 0.48 over 3. Stretching to 5 years gives 0.19, with an annualized covariance of 855.1 %².
In AMPH's tracked universe of 13 assets, SHC sits right near the top at #1. Their recent paths diverged sharply: over the last 12 months SHC outperformed by 46.3 percentage points (-28.2% for AMPH against +18.1% for SHC).
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.
AMPH vs SHC: side by side
| AMPH (Amphastar Pharmaceuticals, Inc.) | SHC (Sotera Health Company) | |
|---|---|---|
| 1-year return | -28.2% | +18.1% |
| 5-year return | +12.9% | -21.9% |
| Volatility (ann.) | 44.1% | 40.4% |
| Beta vs S&P 500 | 0.67 | 1.09 |
| Max drawdown (3Y) | -73.4% | -43.5% |
| Market cap | $0.9B | $5.6B |
| P/E (trailing) | 13.0 | 34.2 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AMPH | SHC |
|---|---|---|
| 2022 | +20.3% | -64.6% |
| 2023 | +120.7% | +102.3% |
| 2024 | -40.0% | -18.8% |
| 2025 | -27.9% | +28.9% |
| 2026 | -18.3% | +10.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AMPH and SHC good diversifiers for each other?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between AMPH and SHC?
As of 2026-08-27, the correlation of weekly returns between AMPH and SHC is 0.48 over 3 years, 0.55 over 1 year and 0.19 over 5 years.
Is SHC a good diversifier for AMPH?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.48 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/amph-vs-shc.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/amph-vs-shc/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: AMPH correlations · SHC correlations
