SJT vs WST: Correlation
Measured on weekly returns over the past three years, San Juan Basin Royalty Trust (SJT) and West Pharmaceutical Services (WST) carry a correlation of -0.24, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SJT and WST?
On 3 years of weekly data the SJT/WST correlation comes out at -0.24, negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.22) sits close to the 3-year figure. The 5-year figure is -0.11, and annualized covariance runs at -390.1 %².
WST is close to the least connected end of SJT's tracked universe, ranking #11 of 11. The last year tells two different stories: WST led by 93.9 percentage points, -52.8% for SJT against +41.1% for WST.
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.
SJT vs WST: side by side
| SJT (San Juan Basin Royalty Trust) | WST (West Pharmaceutical Services) | |
|---|---|---|
| 1-year return | -52.8% | +41.1% |
| 5-year return | -10.0% | -22.4% |
| Volatility (ann.) | 41.6% | 38.6% |
| Beta vs S&P 500 | 0.18 | 0.86 |
| Max drawdown (3Y) | -67.4% | -53.8% |
| Market cap | – | $24.4B |
| P/E (trailing) | – | 44.8 |
| Dividend yield | 0.00% | 0.25% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | SJT | WST |
|---|---|---|
| 2022 | +120.6% | -49.7% |
| 2023 | -50.0% | +50.0% |
| 2024 | -22.9% | -6.8% |
| 2025 | +46.7% | -15.7% |
| 2026 | -51.6% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SJT and WST good diversifiers for each other?
Yes. With a correlation of -0.24, SJT and WST have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between SJT and WST?
The SJT/WST correlation stands at -0.24 on a 3-year window (1 year: -0.22, 5 years: -0.11), computed from weekly returns as of 2026-08-27.
Is WST a good diversifier for SJT?
Yes. With a correlation of -0.24, SJT and WST have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.24 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/sjt-vs-wst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/sjt-vs-wst/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: SJT correlations · WST correlations
