FERG vs IWM: Correlation
How closely do Ferguson Enterprises (FERG) and iShares Russell 2000 ETF (IWM) trade together? Their weekly returns over three years give a correlation of 0.58, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FERG and IWM?
Over the past 3 years, FERG and IWM moved with a correlation of 0.58, which is moderate. Little has changed lately, as the 1-year reading of 0.52 lands near the 3-year figure. Over 5 years the correlation is 0.58, and the annualized covariance of weekly returns is 346.8 %².
Among the 35 assets we track against FERG, IWM ranks #9 by 3-year correlation. Correlation aside, the last 12 months split them widely, with IWM ahead by 27.3 points (+1.1% versus +28.4%). On a rolling one-year basis the correlation drifted between 0.45 and 0.76, a moderate band. One caveat on sizing: FERG is 1.5 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.
FERG vs IWM: side by side
| FERG (Ferguson Enterprises) | IWM (iShares Russell 2000 ETF) | |
|---|---|---|
| 1-year return | +1.1% | +28.4% |
| 5-year return | +82.2% | +41.5% |
| Volatility (ann.) | 30.0% | 19.8% |
| Beta vs S&P 500 | 0.99 | 1.06 |
| Max drawdown (3Y) | -32.9% | -27.5% |
| Market cap | $45.1B | – |
| P/E (trailing) | 23.0 | – |
| Dividend yield | 1.80% | 0.91% |
| Expense ratio | – | 0.19% |
| Assets under management | – | $80.1B |
| Sector / category | Industrials | ETF · US Small & Mid Cap |
IWM, iShares's Small Blend fund, carries $80.1B under management, 1757 holdings, a 0.19% expense ratio, a 0.91% trailing dividend yield.
Year-by-year returns
| Year | FERG | IWM |
|---|---|---|
| 2022 | -27.2% | -20.5% |
| 2023 | +55.1% | +16.8% |
| 2024 | -8.6% | +11.4% |
| 2025 | +29.9% | +12.7% |
| 2026 | +6.4% | +22.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FERG and IWM good diversifiers for each other?
Somewhat, no more. With 0.58 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between FERG and IWM?
As of 2026-08-27, the correlation of weekly returns between FERG and IWM is 0.58 over 3 years, 0.52 over 1 year and 0.58 over 5 years.
Is IWM a good diversifier for FERG?
Somewhat, no more. With 0.58 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.58 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/ferg-vs-iwm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/ferg-vs-iwm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: FERG correlations · IWM correlations
