IEX vs ROK: Correlation
How closely do IDEX Corporation (IEX) and Rockwell Automation (ROK) trade together? Their weekly returns over three years give a correlation of 0.50, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IEX and ROK?
Over the past 3 years, IEX and ROK moved with a correlation of 0.50, which is moderate. Little has changed lately, as the 1-year reading of 0.48 lands near the 3-year figure. Over 5 years the correlation is 0.58, and the annualized covariance of weekly returns is 327.4 %².
By 3-year correlation, ROK places #27 of the 40 assets tracked against IEX. Their recent paths diverged sharply: over the last 12 months IEX outperformed by 17.3 percentage points (+43.0% for IEX against +25.7% for ROK). Across three years, the rolling one-year figure varied moderately, from 0.31 to 0.67.
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.
IEX vs ROK: side by side
| IEX (IDEX Corporation) | ROK (Rockwell Automation) | |
|---|---|---|
| 1-year return | +43.0% | +25.7% |
| 5-year return | +10.5% | +44.9% |
| Volatility (ann.) | 23.3% | 27.9% |
| Beta vs S&P 500 | 0.89 | 0.97 |
| Max drawdown (3Y) | -34.6% | -29.0% |
| Market cap | $17.2B | $48.2B |
| P/E (trailing) | 33.8 | 40.6 |
| Dividend yield | 1.23% | 1.26% |
| Sector / category | Industrials | Industrials |
Year-by-year returns
| Year | IEX | ROK |
|---|---|---|
| 2022 | -2.2% | -24.8% |
| 2023 | -3.8% | +22.6% |
| 2024 | -2.4% | -6.2% |
| 2025 | -13.7% | +38.4% |
| 2026 | +32.9% | +12.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IEX and ROK good diversifiers for each other?
Somewhat, no more. With 0.50 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between IEX and ROK?
As of 2026-08-27, the correlation of weekly returns between IEX and ROK is 0.50 over 3 years, 0.48 over 1 year and 0.58 over 5 years.
Is ROK a good diversifier for IEX?
Somewhat, no more. With 0.50 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.50 mean?
A reading of 0.50 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/iex-vs-rok.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/iex-vs-rok/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IEX correlations · ROK correlations
