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: Finance, Healthcare and Technology. IWM is less expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.39% for IWMW. IWM is up 20.11% year-to-date (YTD) with -$7.28B in YTD flows. IWMW performs worse with 15.91% YTD performance, and +$24M 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 09/08/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWM IWMW | -1.79%-0.46% | +3.94%+7.43% | +20.11%+15.91% | +24.98%+19.22% | +65.90%n/a | +40.13%n/a |
| Flows | IWM IWMW | +$311M+$751K | -$908M+$8M | -$7.28B+$24M | -$2.74B+$35M | -$2.35B- | -$5.33B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWM IWMW | +14.88%+9.86% | +18.90%+12.24% | +21.24%n/a | +22.50%n/a |
| Max drawdown | IWM IWMW | -4.76%-2.86% | -11.03%-6.92% | -27.52%n/a | -31.96%n/a |
| Max drawdown duration | IWM IWMW | 23d23d | 82d62d | 289dn/a | 1093dn/a |
Trading data
IWM | IWMW | |
Last sale 9/9/2026 at 1:30 PM | $290.64 | $38.91 |
| Previous close 09/08/2026 | $294.67 | $39.44 |
| Consolidated volume 09/08/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 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 9/9/2026 at 1:30 PM
Live
Closed
IWM | IWMW | |
|---|---|---|
| Last price | $290.64 | $38.91 |
| 1D performance | -1.37% | -1.34% |
| AuM | $79.99 B | $59.99 M |
| E/R | 0.19% | 0.39% |
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Exposure
Countries
IWM
USA
95.53%
Other
4.47%
IWMW
USA
96.06%
Other
3.94%
Sectors
IWM
Finance
26.78%
Healthcare
20.22%
Technology
11.82%
Industrials
10.54%
Other
30.64%
IWMW
Finance
26.88%
Healthcare
20.29%
Technology
11.87%
Industrials
10.58%
Other
30.37%
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Diversification
IWM
Total weight of top 15 holdings out of 15
4.93%
IWMW
Total weight of top 15 holdings out of 15
5.1%
Top 15 holdings
Data as of July 31, 2026
IWM
BlackRock Cash Funds - Treasury
0.46%
Moog, Inc.
0.39%
BrightSpring Health Services, Inc.
0.38%
Hut 8 Corp.
0.36%
UMB Financial Corp.
0.35%
Cytokinetics, Inc.
0.34%
ViaSat, Inc.
0.32%
Glaukos Corp.
0.31%
Krystal Biotech, Inc.
0.31%
CareTrust REIT, Inc.
0.30%
Old National Bancorp
0.30%
Brinker International, Inc.
0.29%
Crinetics Pharmaceuticals, Inc.
0.28%
HealthEquity, Inc.
0.28%
JFrog Ltd.
0.27%
IWMW
BlackRock Cash Funds - Treasury
0.61%
Moog, Inc.
0.39%
BrightSpring Health Services, Inc.
0.38%
Hut 8 Corp.
0.36%
UMB Financial Corp.
0.35%
Cytokinetics, Inc.
0.34%
ViaSat, Inc.
0.32%
Glaukos Corp.
0.31%
Krystal Biotech, Inc.
0.31%
CareTrust REIT, Inc.
0.30%
Old National Bancorp
0.30%
Brinker International, Inc.
0.29%
Crinetics Pharmaceuticals, Inc.
0.28%
HealthEquity, Inc.
0.28%
JFrog Ltd.
0.28%
Frequently asked questions about IWM and IWMW
How have the IWM and IWMW ETFs performed in 2026?
As of September 8, 2026, IWM is up 20.11% year-to-date (YTD), while IWMW has returned 15.91%. 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 -$7.28B in flows, compared to +$24M for IWMW.
Which ETF is more volatile: IWM or IWMW?
Over the past year, IWM had a volatility of 18.9%, while IWMW experienced 12.24%.
Which ETF is bigger: IWM or IWMW?
As of September 8, 2026, IWM holds $79.99 B in assets under management (AUM), while IWMW manages $59.99 M.
What sectors do the IWM and IWMW ETFs invest in?
IWM leans toward sectors like Finance, Healthcare and Technology. Meanwhile, IWMW focuses on Finance, Healthcare and Technology.
What are the top holdings of the IWM ETF and IWMW ETF?
IWM top holdings include BlackRock Cash Funds - Treasury, Moog, Inc. and BrightSpring Health Services, Inc.. IWMW holds in its top three: BlackRock Cash Funds - Treasury, Moog, Inc. and BrightSpring Health Services, Inc..
Which ETF is more diversified: IWM or IWMW?
IWM holds 1957 securities with 4.93% of its assets in the top 15. IWMW has 1957 securities and a top 15 weight of 5.1%.
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Latest news about IWM & IWMW
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