QQQ vs WST: Correlation
Invesco QQQ Trust (QQQ) and West Pharmaceutical Services (WST) show a weak relationship: their 3-year correlation of weekly returns is 0.26.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are QQQ and WST?
On 3 years of weekly data the QQQ/WST correlation comes out at 0.26, weak. The relationship has been stable: the 1-year correlation (0.30) sits close to the 3-year figure. The 5-year figure is 0.42, and annualized covariance runs at 197.2 %².
Among the 4755 assets we track against QQQ, WST ranks #2056 by 3-year correlation. On 12-month performance WST holds a 14.8-point edge, +26.3% against +41.1%. Do not treat this figure as fixed: across three years the rolling one-year correlation ranged all the way from -0.03 to 0.58. Risk is not evenly split, since WST carries 2.0 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.
QQQ vs WST: side by side
| QQQ (Invesco QQQ Trust) | WST (West Pharmaceutical Services) | |
|---|---|---|
| 1-year return | +26.3% | +41.1% |
| 5-year return | +95.4% | -22.4% |
| Volatility (ann.) | 19.6% | 38.6% |
| Beta vs S&P 500 | 1.28 | 0.86 |
| Max drawdown (3Y) | -22.8% | -53.8% |
| Market cap | – | $24.4B |
| P/E (trailing) | – | 44.8 |
| Dividend yield | 0.44% | 0.25% |
| Expense ratio | 0.18% | – |
| Assets under management | $452.8B | – |
| Sector / category | ETF · US Growth & Tech | Health Care |
On the fund side, QQQ sits in the Large Growth category at Invesco, with $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | QQQ | WST |
|---|---|---|
| 2022 | -32.6% | -49.7% |
| 2023 | +54.9% | +50.0% |
| 2024 | +25.6% | -6.8% |
| 2025 | +20.8% | -15.7% |
| 2026 | +17.7% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are QQQ and WST good diversifiers for each other?
A fair diversifier. At 0.26, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between QQQ and WST?
The QQQ/WST correlation stands at 0.26 on a 3-year window (1 year: 0.30, 5 years: 0.42), computed from weekly returns as of 2026-08-27.
Is WST a good diversifier for QQQ?
A fair diversifier. At 0.26, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.26 mean?
On the −1 to +1 scale, 0.26 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/qqq-vs-wst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/qqq-vs-wst/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: QQQ correlations · WST correlations
