IWS vs MDY: holdings overlap, shared companies and scores
As of October 28, 2026, IWS and MDY overlap 22.6% by weight. iShares Russell Mid-Cap Value ETF (IWS): U.S. mid-cap value stocks. State Street SPDR S&P MIDCAP 400 ETF Trust (MDY): U.S. mid-cap stocks.
Updated October 28, 2026
Where IWS and MDY trade against their own history
IWS trades at 18.9 times earnings, against its own median of 17.8, and is more expensive than 63% of its own last 9 years.
MDY trades at 20.2 times earnings, against its own median of 18.9, and is more expensive than 65% of its own last 9 years.
What do IWS and MDY each hold?
What's inside IWS: Tech 13%, Semiconductors 1%.
7% of IWS is its ten largest holdings.
What's inside MDY: Tech 16%, Semiconductors 4%.
7% of MDY is its ten largest holdings.
How much do IWS and MDY overlap? 22.6% by weight
As of October 28, 2026, IWS and MDY overlap 22.6% by weight.
23% of IWS is already inside MDY.
76% of MDY is already inside IWS.
IWS holds 721 companies and MDY holds 397; 279 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 IWS and MDY? 4.5 and 4.4 out of 10
As of October 28, 2026, ETF Copilot scores IWS 4.5 out of 10 and MDY 4.4 out of 10.
They differ most on Growth: IWS 2.2 and MDY 5.0.
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 | IWS | MDY |
|---|---|---|
| Growth | 2.2 | 5.0 |
| Value | 5.2 | 4.9 |
| Risk | 7.5 | 5.3 |
| Quality | 2.9 | 2.4 |
| Return | 5.5 | 4.2 |
IWS and MDY both charge 0.23% a year
As of October 28, 2026, IWS charges 0.23% a year, yields 1.30% and holds $14.9B in assets across 721 positions.
As of October 28, 2026, MDY charges 0.23% a year, yields 1.05% and holds $25.9B in assets across 397 positions.
| Measure | IWS | MDY |
|---|---|---|
| Expense ratio | 0.23% | 0.23% |
| Dividend yield | 1.30% | 1.05% |
| Assets under management | $14.9B | $25.9B |
| Holdings | 721 | 397 |
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, “IWS vs MDY holdings overlap and scores”, as of October 28, 2026.
https://etf-copilot.com/compare/iws-vs-mdy
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