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IWSvsMMIDETF Comparison
iShares Russell Mid-Cap Value ETF (IWS) belongs to the US Mid Cap Value segment. MFS Active Mid Cap ETF (MMID) is part of the Uncategorized Equities segment. IWS's top 3 sector exposures are Industrials, Financials and Information Technology. In contrast, MMID's top sector exposures are Industrials, Information Technology and Financials. IWS is less expensive with a Total Expense Ratio (TER) of 0.23%, versus 0.59% for MMID. IWS is up 4.73% year-to-date (YTD) with -$207M in YTD flows. MMID performs worse with 1.09% YTD performance, and +$512K in YTD flows. Run a side-by-side ETF comparison of IWS and MMID below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
IWS vs MMID performance and flow charts
Performance
Cumulative Flows
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWS MMID | -3.23%-3.48% | +3.53%+1.75% | +4.73%+1.09% | +19.38%n/a | +49.21%n/a | +47.68%n/a |
| Flows | IWS MMID | +$71M+$514K | -$79M+$512K | -$207M+$512K | -$417M- | -$2.16B- | -$2.25B- |
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWS MMID | +13.30%+13.70% | +18.28%n/a | +15.60%n/a | +17.33%n/a |
| Max drawdown | IWS MMID | -4.33%-3.92% | -13.73%n/a | -20.45%n/a | -21.32%n/a |
| Max drawdown duration | IWS MMID | 8d29d | 46dn/a | 269dn/a | 785dn/a |
IWS | MMID | |
Last sale 3/11/2026 at 1:30 PM | $147.45 | $24.90 |
| Previous close 03/10/2026 | $147.69 | $25.28 |
| Consolidated volume 03/10/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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IWS | MMID | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
IWS | MMID | |
|---|---|---|
| Last price | $147.45 | $24.90 |
| 1D performance | -0.16% | -1.52% |
| AuM | $14.80 B | $33.08 M |
| E/R | 0.23% | 0.59% |
Countries
Sectors
Diversification
Total weight of top 15 holdings out of 15
Total weight of top 15 holdings out of 15
Top 15 holdings
How have the IWS and MMID ETFs performed in 2026?
As of March 10, 2026, IWS is up 4.73% year-to-date (YTD), while MMID has returned 1.09%. That puts IWS better performer ahead so far this year.
Which ETF is attracting more investor money: IWS or MMID?
Year-to-date, the IWS ETF saw -$207M in flows, compared to +$512K for MMID.
Which ETF is bigger: IWS or MMID?
As of March 10, 2026, IWS holds $14.80 B in assets under management (AUM), while MMID manages $33.08 M.
What sectors do the IWS and MMID ETFs invest in?
IWS leans toward sectors like Industrials, Financials and Information Technology. Meanwhile, MMID focuses on Industrials, Information Technology and Financials.
What are the top holdings of the IWS ETF and MMID ETF?
IWS top holdings include WESTERN DIGITAL, CORNING and CUMMINS. MMID holds in its top three: ROSS STORES, DIAMONDBACK ENERGY and WABTEC.
Which ETF is more diversified: IWS or MMID?
IWS holds 714 securities with 9.98% of its assets in the top 15. MMID has 92 securities and a top 15 weight of 19.54%.
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