LYB vs WLK: Correlation
Measured on weekly returns over the past three years, LyondellBasell (LYB) and Westlake Corporation (WLK) carry a correlation of 0.61, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are LYB and WLK?
Across a 3-year window, the weekly returns of LYB and WLK correlate at 0.61, strong. Little has changed lately, as the 1-year reading of 0.54 lands near the 3-year figure. Stretching to 5 years gives 0.67, with an annualized covariance of 795.3 %².
By 3-year correlation, WLK places #5 of the 36 assets tracked against LYB. Their recent paths diverged sharply: over the last 12 months LYB outperformed by 30.9 percentage points (+19.1% for LYB against -11.8% for WLK).
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.
LYB vs WLK: side by side
| LYB (LyondellBasell) | WLK (Westlake Corporation) | |
|---|---|---|
| 1-year return | +19.1% | -11.8% |
| 5-year return | -12.8% | -8.0% |
| Volatility (ann.) | 33.7% | 39.0% |
| Beta vs S&P 500 | 0.42 | 0.82 |
| Max drawdown (3Y) | -55.4% | -64.2% |
| Market cap | $20.4B | $9.4B |
| P/E (trailing) | – | – |
| Dividend yield | 6.58% | 2.84% |
| Sector / category | Materials | US Listed |
Year-by-year returns
| Year | LYB | WLK |
|---|---|---|
| 2022 | -1.0% | +6.8% |
| 2023 | +20.7% | +38.4% |
| 2024 | -17.4% | -16.9% |
| 2025 | -36.0% | -33.8% |
| 2026 | +50.5% | +1.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are LYB and WLK good diversifiers for each other?
Only partially. A correlation of 0.61 means LYB and WLK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between LYB and WLK?
The LYB/WLK correlation stands at 0.61 on a 3-year window (1 year: 0.54, 5 years: 0.67), computed from weekly returns as of 2026-08-27.
Is WLK a good diversifier for LYB?
Only partially. A correlation of 0.61 means LYB and WLK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.61 mean?
On the −1 to +1 scale, 0.61 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/lyb-vs-wlk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/lyb-vs-wlk/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: LYB correlations · WLK correlations
