IWM vs WCC: Correlation
How closely do iShares Russell 2000 ETF (IWM) and WESCO International, Inc. (WCC) 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 IWM and WCC?
On 3 years of weekly data the IWM/WCC correlation comes out at 0.63, strong. The past 12 months show a weaker link (0.44) than the 3-year average (0.63). The 5-year figure is 0.68, and annualized covariance runs at 478.6 %².
Among the 320 assets we track against IWM, WCC ranks #90 by 3-year correlation. Correlation aside, the last 12 months split them widely, with WCC ahead by 27.0 points (+28.4% versus +55.4%). Note the risk asymmetry: WCC runs 1.9 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
IWM vs WCC: side by side
| IWM (iShares Russell 2000 ETF) | WCC (WESCO International, Inc.) | |
|---|---|---|
| 1-year return | +28.4% | +55.4% |
| 5-year return | +41.5% | +203.7% |
| Volatility (ann.) | 19.8% | 38.3% |
| Beta vs S&P 500 | 1.06 | 1.59 |
| Max drawdown (3Y) | -27.5% | -37.4% |
| Market cap | – | $17.1B |
| P/E (trailing) | – | 24.0 |
| Dividend yield | 0.91% | 0.55% |
| Expense ratio | 0.19% | – |
| Assets under management | $80.1B | – |
| Sector / category | ETF · US Small & Mid Cap | US Listed |
IWM is a Small Blend fund from iShares: $80.1B under management, 1757 holdings, a 0.19% expense ratio, a 0.91% trailing dividend yield.
Year-by-year returns
| Year | IWM | WCC |
|---|---|---|
| 2022 | -20.5% | -4.9% |
| 2023 | +16.8% | +40.2% |
| 2024 | +11.4% | +5.1% |
| 2025 | +12.7% | +36.4% |
| 2026 | +22.3% | +43.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IWM and WCC good diversifiers for each other?
To a limited degree. At 0.63 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between IWM and WCC?
As of 2026-08-27, the correlation of weekly returns between IWM and WCC is 0.63 over 3 years, 0.44 over 1 year and 0.68 over 5 years.
Is WCC a good diversifier for IWM?
To a limited degree. At 0.63 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.63 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/iwm-vs-wcc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/iwm-vs-wcc/)
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Related comparisons
Hubs: IWM correlations · WCC correlations
