FERG vs IEX: Correlation
How closely do Ferguson Enterprises (FERG) and IDEX Corporation (IEX) trade together? Their weekly returns over three years give a correlation of 0.53, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FERG and IEX?
On 3 years of weekly data the FERG/IEX correlation comes out at 0.53, moderate. The relationship has been stable: the 1-year correlation (0.56) sits close to the 3-year figure. The 5-year figure is 0.52, and annualized covariance runs at 374.8 %².
Within FERG's tracked universe of 35 assets, IEX comes in at #18 by 3-year correlation. The last year tells two different stories: IEX led by 41.9 percentage points, +1.1% for FERG against +43.0% for IEX. On a rolling one-year basis the correlation drifted between 0.40 and 0.67, a moderate band.
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 IEX: side by side
| FERG (Ferguson Enterprises) | IEX (IDEX Corporation) | |
|---|---|---|
| 1-year return | +1.1% | +43.0% |
| 5-year return | +82.2% | +10.5% |
| Volatility (ann.) | 30.0% | 23.3% |
| Beta vs S&P 500 | 0.99 | 0.89 |
| Max drawdown (3Y) | -32.9% | -34.6% |
| Market cap | $45.1B | $17.2B |
| P/E (trailing) | 23.0 | 33.8 |
| Dividend yield | 1.80% | 1.23% |
| Sector / category | Industrials | Industrials |
Year-by-year returns
| Year | FERG | IEX |
|---|---|---|
| 2022 | -27.2% | -2.2% |
| 2023 | +55.1% | -3.8% |
| 2024 | -8.6% | -2.4% |
| 2025 | +29.9% | -13.7% |
| 2026 | +6.4% | +32.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FERG and IEX good diversifiers for each other?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between FERG and IEX?
As of 2026-08-27, the correlation of weekly returns between FERG and IEX is 0.53 over 3 years, 0.56 over 1 year and 0.52 over 5 years.
Is IEX a good diversifier for FERG?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.53 mean?
A reading of 0.53 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/ferg-vs-iex.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ferg-vs-iex/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: FERG correlations · IEX correlations
