IWB vs IYM: holdings overlap, shared companies and scores
As of October 9, 2026, IWB and IYM overlap 1.6% by weight. iShares Russell 1000 ETF (IWB): Russell 1000 index. iShares U.S. Basic Materials ETF (IYM): U.S. basic materials stocks.
Updated October 9, 2026
Where IWB and IYM trade against their own history
IWB trades at 24.4 times earnings, against its own median of 22.4, and is more expensive than 63% of its own last 9 years.
IYM trades at 23.1 times earnings, against its own median of 18.0, and is more expensive than 79% of its own last 9 years.
What moved IWB and IYM this week
IWB rose 1.2% in the week to October 9, 2026. The holdings that moved it most were Microsoft (+3.4%), Amazon.com (+4.3%) and Alphabet (+2.4%); Nvidia (−2.0%) pushed the other way.
IYM rose 0.8% in the week to October 9, 2026. The holdings that moved it most were Freeport-McMoRan (+2.3%), Newmont (+2.0%) and Ecolab (+3.0%); Mosaic (−11.1%) pushed the other way.
What do IWB and IYM each hold?
What's inside IWB: Tech 44%, Magnificent 7 32%.
37% of IWB is its ten largest holdings.
68% of IYM is its ten largest holdings.
How much do IWB and IYM overlap? 1.6% by weight
As of October 9, 2026, IWB and IYM overlap 1.6% by weight.
2% of IWB is already inside IYM.
100% of IYM is already inside IWB.
IWB holds 1,023 companies and IYM holds 43; 42 are in both.
Computed by ETF Copilot from both funds' holdings rather than quoted from a data provider, and rebuilt nightly.
How does ETF Copilot score IWB and IYM? 6.7 and 4.4 out of 10
As of October 9, 2026, ETF Copilot scores IWB 6.7 out of 10 and IYM 4.4 out of 10.
They differ most on Growth: IWB 7.3 and IYM 4.0.
The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.
| Factor | IWB | IYM |
|---|---|---|
| Growth | 7.3 | 4.0 |
| Value | 3.1 | 3.0 |
| Risk | 6.6 | 3.5 |
| Quality | 8.1 | 6.2 |
| Return | 7.8 | 5.0 |
IWB is the cheaper of the two at 0.15% a year
As of October 9, 2026, IWB charges 0.15% a year, yields 0.90% and holds $49.6B in assets across 1023 positions.
As of October 9, 2026, IYM charges 0.37% a year, yields 1.27% and holds $1.3B in assets across 43 positions.
| Measure | IWB | IYM |
|---|---|---|
| Expense ratio | 0.15% | 0.37% |
| Dividend yield | 0.90% | 1.27% |
| Assets under management | $49.6B | $1.3B |
| Holdings | 1023 | 43 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Compare with similar funds
Cite this
ETF Copilot, “IWB vs IYM holdings overlap and scores”, as of October 9, 2026.
https://etf-copilot.com/compare/iwb-vs-iym
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