WSO vs XLI: Correlation
How closely do Watsco, Inc. (WSO) and Industrial Select Sector SPDR Fund (XLI) trade together? Their weekly returns over three years give a correlation of 0.63, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are WSO and XLI?
Across a 3-year window, the weekly returns of WSO and XLI correlate at 0.63, strong. Recent behaviour matches the longer record: 0.68 over 1 year against 0.63 over 3. Stretching to 5 years gives 0.66, with an annualized covariance of 314.6 %².
Few assets follow WSO as closely as XLI, which ranks #3 of 11 tracked partners. Correlation aside, the last 12 months split them widely, with XLI ahead by 39.1 points (-20.8% versus +18.3%). Risk is not evenly split, since WSO 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.
WSO vs XLI: side by side
| WSO (Watsco, Inc.) | XLI (Industrial Select Sector SPDR Fund) | |
|---|---|---|
| 1-year return | -20.8% | +18.3% |
| 5-year return | +28.2% | +84.0% |
| Volatility (ann.) | 31.9% | 15.7% |
| Beta vs S&P 500 | 1.05 | 0.89 |
| Max drawdown (3Y) | -44.1% | -18.5% |
| Market cap | $12.9B | – |
| P/E (trailing) | 27.0 | – |
| Dividend yield | 3.91% | 1.15% |
| Expense ratio | – | 0.08% |
| Assets under management | – | $32.9B |
| Sector / category | US Listed | Sector ETF |
XLI is an Industrials fund from State Street Investment Management: $32.9B under management, 83 holdings, a 0.08% expense ratio, a 1.15% trailing dividend yield.
Year-by-year returns
| Year | WSO | XLI |
|---|---|---|
| 2022 | -17.7% | -5.6% |
| 2023 | +77.0% | +18.1% |
| 2024 | +13.2% | +17.3% |
| 2025 | -27.0% | +19.3% |
| 2026 | -4.8% | +15.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are WSO and XLI good diversifiers for each other?
Somewhat, no more. With 0.63 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between WSO and XLI?
The WSO/XLI correlation stands at 0.63 on a 3-year window (1 year: 0.68, 5 years: 0.66), computed from weekly returns as of 2026-08-27.
Is XLI a good diversifier for WSO?
Somewhat, no more. With 0.63 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.63 mean?
A reading of 0.63 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/wso-vs-xli.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/wso-vs-xli/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: WSO correlations · XLI correlations
