AMPH vs XWEL: Correlation
Amphastar Pharmaceuticals, Inc. (AMPH) and XWELL, Inc. (XWEL) show a negative relationship: their 3-year correlation of weekly returns is -0.30.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AMPH and XWEL?
Across a 3-year window, the weekly returns of AMPH and XWEL correlate at -0.30, negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.55 versus -0.30 over 3 years. Stretching to 5 years gives -0.22, with an annualized covariance of -2531.2 %².
Out of 13 assets tracked against AMPH, XWEL lands near the bottom at #13. The last year tells two different stories: XWEL led by 20.7 percentage points, -28.2% for AMPH against -7.5% for XWEL. Risk is not evenly split, since XWEL carries 4.3 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.
AMPH vs XWEL: side by side
| AMPH (Amphastar Pharmaceuticals, Inc.) | XWEL (XWELL, Inc.) | |
|---|---|---|
| 1-year return | -28.2% | -7.5% |
| 5-year return | +12.9% | -97.2% |
| Volatility (ann.) | 44.1% | 188.4% |
| Beta vs S&P 500 | 0.67 | 0.41 |
| Max drawdown (3Y) | -73.4% | -92.8% |
| Market cap | $0.9B | – |
| P/E (trailing) | 13.0 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AMPH | XWEL |
|---|---|---|
| 2022 | +20.3% | -82.2% |
| 2023 | +120.7% | -75.8% |
| 2024 | -40.0% | -13.2% |
| 2025 | -27.9% | -69.5% |
| 2026 | -18.3% | +115.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AMPH and XWEL good diversifiers for each other?
Yes. With a correlation of -0.30, AMPH and XWEL have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between AMPH and XWEL?
The AMPH/XWEL correlation stands at -0.30 on a 3-year window (1 year: -0.55, 5 years: -0.22), computed from weekly returns as of 2026-08-27.
Is XWEL a good diversifier for AMPH?
Yes. With a correlation of -0.30, AMPH and XWEL have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.30 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-xwel.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/amph-vs-xwel/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AMPH correlations · XWEL correlations
