ASG vs WST: Correlation
Measured on weekly returns over the past three years, Liberty All-Star Growth Fund, Inc. (ASG) and West Pharmaceutical Services (WST) carry a correlation of 0.38, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASG and WST?
On 3 years of weekly data the ASG/WST correlation comes out at 0.38, moderate. Little has changed lately, as the 1-year reading of 0.41 lands near the 3-year figure. The 5-year figure is 0.47, and annualized covariance runs at 269.7 %².
Among the 52 assets we track against ASG, WST sits near the bottom by co-movement, at rank #49. The last year tells two different stories: WST led by 37.8 percentage points, +3.3% for ASG against +41.1% for WST. One caveat on sizing: WST is 2.1 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.
ASG vs WST: side by side
| ASG (Liberty All-Star Growth Fund, Inc.) | WST (West Pharmaceutical Services) | |
|---|---|---|
| 1-year return | +3.3% | +41.1% |
| 5-year return | -5.6% | -22.4% |
| Volatility (ann.) | 18.3% | 38.6% |
| Beta vs S&P 500 | 1.12 | 0.86 |
| Max drawdown (3Y) | -25.3% | -53.8% |
| Market cap | $0.3B | $24.4B |
| P/E (trailing) | 23.9 | 44.8 |
| Dividend yield | 8.76% | 0.25% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | ASG | WST |
|---|---|---|
| 2022 | -40.9% | -49.7% |
| 2023 | +16.2% | +50.0% |
| 2024 | +16.8% | -6.8% |
| 2025 | +2.2% | -15.7% |
| 2026 | +6.0% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASG and WST good diversifiers for each other?
A fair diversifier. At 0.38, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ASG and WST?
The ASG/WST correlation stands at 0.38 on a 3-year window (1 year: 0.41, 5 years: 0.47), computed from weekly returns as of 2026-08-27.
Is WST a good diversifier for ASG?
A fair diversifier. At 0.38, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.38 mean?
A reading of 0.38 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/asg-vs-wst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/asg-vs-wst/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ASG correlations · WST correlations
