GNTX vs WST: Correlation
Gentex Corporation (GNTX) and West Pharmaceutical Services (WST) show a moderate relationship: their 3-year correlation of weekly returns is 0.49.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GNTX and WST?
On 3 years of weekly data the GNTX/WST correlation comes out at 0.49, moderate. The link has loosened recently: the 1-year correlation (0.37) runs below the 3-year figure (0.49). The 5-year figure is 0.39, and annualized covariance runs at 468.5 %².
Within GNTX's tracked universe of 12 assets, WST comes in at #6 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months WST outperformed by 58.3 percentage points (-17.2% for GNTX against +41.1% for WST). One caveat on sizing: WST is 1.6 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.
GNTX vs WST: side by side
| GNTX (Gentex Corporation) | WST (West Pharmaceutical Services) | |
|---|---|---|
| 1-year return | -17.2% | +41.1% |
| 5-year return | -18.8% | -22.4% |
| Volatility (ann.) | 24.9% | 38.6% |
| Beta vs S&P 500 | 0.61 | 0.86 |
| Max drawdown (3Y) | -43.0% | -53.8% |
| Market cap | $4.9B | $24.4B |
| P/E (trailing) | 12.2 | 44.8 |
| Dividend yield | 2.01% | 0.25% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | GNTX | WST |
|---|---|---|
| 2022 | -20.4% | -49.7% |
| 2023 | +21.8% | +50.0% |
| 2024 | -10.7% | -6.8% |
| 2025 | -17.4% | -15.7% |
| 2026 | +0.7% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GNTX and WST good diversifiers for each other?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between GNTX and WST?
The GNTX/WST correlation stands at 0.49 on a 3-year window (1 year: 0.37, 5 years: 0.39), computed from weekly returns as of 2026-08-27.
Is WST a good diversifier for GNTX?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.49 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/gntx-vs-wst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/gntx-vs-wst/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: GNTX correlations · WST correlations
