IWMvsIWMWETF Comparison
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iShares Russell 2000 ETF (IWM) belongs to the US Small Cap segment. iShares Russell 2000 BuyWrite ETF (IWMW) is part of the Options Strategies segment. Both ETFs have the same top 3 sector exposures: Industrials, Health Care and Financials. IWM is less expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.39% for IWMW. IWM is up 13.69% year-to-date (YTD) with -$5.35B in YTD flows. IWMW performs worse with 5.6% YTD performance, and +$16M in YTD flows. Run a side-by-side ETF comparison of IWM and IWMW below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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IWM vs IWMW performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 05/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWM IWMW | +11.99%+4.98% | +6.82%+3.11% | +13.69%+5.60% | +44.01%+23.80% | +65.12%n/a | +31.42%n/a |
| Flows | IWM IWMW | -$2.89B+$3M | -$1.59B+$7M | -$5.35B+$16M | -$3.95B+$30M | +$222M- | -$3.59B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWM IWMW | +22.01%+15.67% | +19.47%+12.31% | +21.26%n/a | +22.62%n/a |
| Max drawdown | IWM IWMW | -10.06%-6.92% | -11.03%-6.92% | -27.52%n/a | -31.96%n/a |
| Max drawdown duration | IWM IWMW | 63d62d | 82d62d | 289dn/a | 1093dn/a |
Trading data
IWM | IWMW | |
Last sale 5/1/2026 at 1:30 PM | $279.28 | $38.69 |
| Previous close 04/29/2026 | $277.97 | $38.53 |
| Consolidated volume 04/29/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of April 30, 2026
1-year trailing difference
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IWM | IWMW | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 5/1/2026 at 1:30 PM
Live
Closed
IWM | IWMW | |
|---|---|---|
| Last price | $279.28 | $38.69 |
| 1D performance | +0.47% | +0.41% |
| AuM | $77.89 B | $51.00 M |
| E/R | 0.19% | 0.39% |
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Exposure
Countries
IWM
USA
92.1%
Other
7.9%
IWMW
USA
93.98%
Other
6.02%
Sectors
IWM
Industrials
15.39%
Health Care
15.1%
Financials
14.5%
Information Techn.
14.1%
Consumer Discreti.
8.42%
Other
32.5%
IWMW
Industrials
15.67%
Health Care
15.36%
Financials
14.76%
Information Techn.
14.35%
Consumer Discreti.
8.57%
Other
31.3%
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Diversification
IWM
Total weight of top 15 holdings out of 15
7.51%
IWMW
Total weight of top 15 holdings out of 15
7.64%
Top 15 holdings
Data as of March 31, 2026
IWM
BLOOM ENERGY CORP
1.01%
COEUR MINING INC
0.65%
FABRINET
0.64%
US65290E1010
0.60%
ECHOSTAR
0.54%
CREDO TECHNOLOGY GROUP HOLDING
0.52%
KRATOS DEFENSE AND SECURITY SOLS
0.43%
ADVANCED ENERGY INDUSTRIES
0.41%
STERLING INFRASTRUCTURE INC
0.41%
HECLA MINING
0.40%
BRIDGEBIO PHARMA
0.40%
GUARDANT HEALTH INC
0.39%
MODINE MNFC CO
0.39%
ENSIGN GROUP
0.38%
TTM TECHNOLOGIES
0.34%
IWMW
BLOOM ENERGY CORP
1.02%
COEUR MINING INC
0.66%
FABRINET
0.65%
US65290E1010
0.61%
ECHOSTAR
0.55%
CREDO TECHNOLOGY GROUP HOLDING
0.52%
KRATOS DEFENSE AND SECURITY SOLS
0.44%
ADVANCED ENERGY INDUSTRIES
0.42%
STERLING INFRASTRUCTURE INC
0.42%
HECLA MINING
0.41%
BRIDGEBIO PHARMA
0.41%
GUARDANT HEALTH INC
0.40%
MODINE MNFC CO
0.39%
ENSIGN GROUP
0.39%
TTM TECHNOLOGIES
0.35%
Frequently asked questions about IWM and IWMW
How have the IWM and IWMW ETFs performed in 2026?
As of May 1, 2026, IWM is up 13.69% year-to-date (YTD), while IWMW has returned 5.6%. That puts IWM better performer ahead so far this year.
Which ETF is attracting more investor money: IWM or IWMW?
Year-to-date, the IWM ETF saw -$5.35B in flows, compared to +$16M for IWMW.
Which ETF is more volatile: IWM or IWMW?
Over the past year, IWM had a volatility of 19.47%, while IWMW experienced 12.31%.
Which ETF is bigger: IWM or IWMW?
As of May 1, 2026, IWM holds $77.89 B in assets under management (AUM), while IWMW manages $51.00 M.
What sectors do the IWM and IWMW ETFs invest in?
IWM leans toward sectors like Industrials, Health Care and Financials. Meanwhile, IWMW focuses on Industrials, Health Care and Financials.
What are the top holdings of the IWM ETF and IWMW ETF?
IWM top holdings include BLOOM ENERGY CORP, COEUR MINING INC and FABRINET. IWMW holds in its top three: BLOOM ENERGY CORP, COEUR MINING INC and FABRINET.
Which ETF is more diversified: IWM or IWMW?
IWM holds 1934 securities with 7.51% of its assets in the top 15. IWMW has 1934 securities and a top 15 weight of 7.64%.
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