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MMIDvsIWRETF Comparison
MFS Active Mid Cap ETF (MMID) belongs to the Uncategorized Equities segment. iShares Russell Mid-Cap ETF (IWR) is part of the US Mid Cap segment. Both ETFs have the same top 3 sector exposures: Industrials, Information Technology and Financials. MMID is more expensive with a Total Expense Ratio (TER) of 0.59%, versus 0.18% for IWR. MMID is down -0.39% year-to-date (YTD) with +$502K in YTD flows. IWR performs better with 0.96% YTD performance, and +$281M in YTD flows. Run a side-by-side ETF comparison of MMID and IWR below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
MMID vs IWR performance and flow charts
Performance
Cumulative Flows
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | MMID IWR | -4.71%-3.37% | -2.03%-0.19% | -0.39%+0.96% | n/a+17.17% | n/a+51.37% | n/a+39.23% |
| Flows | MMID IWR | +$502K+$566M | +$502K+$729M | +$502K+$281M | -+$4.17B | -+$7.76B | -+$10.09B |
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MMID IWR | +13.40%+14.02% | n/a+19.18% | n/a+16.03% | n/a+18.23% |
| Max drawdown | MMID IWR | -5.33%-6.03% | n/a-14.39% | n/a-21.08% | n/a-26.20% |
| Max drawdown duration | MMID IWR | 31d14d | n/a46d | n/a239d | n/a854d |
MMID | IWR | |
Last sale 3/13/2026 at 1:30 PM | $24.54 | $97.08 |
| Previous close 03/12/2026 | $24.54 | $97.20 |
| Consolidated volume 03/12/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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MMID | IWR | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
MMID | IWR | |
|---|---|---|
| Last price | $24.54 | $97.08 |
| 1D performance | +0.00% | -0.12% |
| AuM | $32.59 M | $47.10 B |
| E/R | 0.59% | 0.18% |
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 MMID and IWR ETFs performed in 2026?
As of March 11, 2026, MMID is down -0.39% year-to-date (YTD), while IWR has returned 0.96%. That puts IWR better performer ahead so far this year.
Which ETF is attracting more investor money: MMID or IWR?
Year-to-date, the MMID ETF saw +$502K in flows, compared to +$281M for IWR.
Which ETF is bigger: MMID or IWR?
As of March 11, 2026, MMID holds $32.59 M in assets under management (AUM), while IWR manages $47.10 B.
What sectors do the MMID and IWR ETFs invest in?
MMID leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, IWR focuses on Industrials, Information Technology and Financials.
What are the top holdings of the MMID ETF and IWR ETF?
MMID top holdings include ROSS STORES, DIAMONDBACK ENERGY and WABTEC. IWR holds in its top three: WESTERN DIGITAL, ROYAL CARIBBEAN GROUP and BANK OF NEW YORK MELLON.
Which ETF is more diversified: MMID or IWR?
MMID holds 92 securities with 19.54% of its assets in the top 15. IWR has 808 securities and a top 15 weight of 8.71%.
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