ALGN vs WST: Correlation
Measured on weekly returns over the past three years, Align Technology (ALGN) and West Pharmaceutical Services (WST) carry a correlation of 0.42, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ALGN and WST?
Across a 3-year window, the weekly returns of ALGN and WST correlate at 0.42, moderate. The relationship has been stable: the 1-year correlation (0.37) sits close to the 3-year figure. Stretching to 5 years gives 0.50, with an annualized covariance of 721.9 %².
By 3-year correlation, WST places #23 of the 37 assets tracked against ALGN. The last year tells two different stories: WST led by 29.2 percentage points, +11.9% for ALGN against +41.1% for WST. Across three years, the rolling one-year figure varied moderately, from 0.25 to 0.59.
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.
ALGN vs WST: side by side
| ALGN (Align Technology) | WST (West Pharmaceutical Services) | |
|---|---|---|
| 1-year return | +11.9% | +41.1% |
| 5-year return | -77.4% | -22.4% |
| Volatility (ann.) | 44.3% | 38.6% |
| Beta vs S&P 500 | 1.51 | 0.86 |
| Max drawdown (3Y) | -66.7% | -53.8% |
| Market cap | $11.3B | $24.4B |
| P/E (trailing) | 27.6 | 44.8 |
| Dividend yield | 0.00% | 0.25% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | ALGN | WST |
|---|---|---|
| 2022 | -67.9% | -49.7% |
| 2023 | +29.9% | +50.0% |
| 2024 | -23.9% | -6.8% |
| 2025 | -25.1% | -15.7% |
| 2026 | +1.7% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ALGN and WST good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between ALGN and WST?
The ALGN/WST correlation stands at 0.42 on a 3-year window (1 year: 0.37, 5 years: 0.50), computed from weekly returns as of 2026-08-27.
Is WST a good diversifier for ALGN?
Yes, to a useful degree: a correlation of 0.42 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.42 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/algn-vs-wst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/algn-vs-wst/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ALGN correlations · WST correlations
