IWCvsIWMETF Comparison
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iShares Micro-Cap ETF (IWC) and iShares Russell 2000 ETF (IWM) belong to the same industry segment: US Small Cap. Both ETFs have the same top 3 sector exposures: Finance, Healthcare and Technology. IWC is more expensive with a Total Expense Ratio (TER) of 0.6%, versus 0.19% for IWM. IWC is up 24.27% year-to-date (YTD) with +$117M in YTD flows. IWM performs worse with 20.11% YTD performance, and -$7.28B in YTD flows. Run a side-by-side ETF comparison of IWC and IWM 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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IWC vs IWM performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/08/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWC IWM | -0.85%-1.79% | +6.45%+3.94% | +24.27%+20.11% | +37.17%+24.98% | +93.40%+65.90% | +40.86%+40.13% |
| Flows | IWC IWM | +$876K+$311M | -$4M-$908M | +$117M-$7.28B | +$166M-$2.74B | +$24M-$2.35B | -$54M-$5.33B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWC IWM | +18.33%+14.88% | +23.78%+18.90% | +24.52%+21.24% | +24.48%+22.50% |
| Max drawdown | IWC IWM | -7.10%-4.76% | -12.28%-11.03% | -29.17%-27.52% | -40.55%-31.96% |
| Max drawdown duration | IWC IWM | 43d23d | 82d82d | 233d289d | 1409d1093d |
Trading data
IWC | IWM | |
Last sale 9/9/2026 at 1:30 PM | $192.44 | $290.64 |
| Previous close 09/08/2026 | $195.17 | $294.67 |
| 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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IWC | IWM | |
|---|---|---|
| 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
IWC | IWM | |
|---|---|---|
| Last price | $192.44 | $290.64 |
| 1D performance | -1.40% | -1.37% |
| AuM | $1.48 B | $79.99 B |
| E/R | 0.6% | 0.19% |
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Exposure
Countries
IWC
USA
97.33%
Other
2.67%
IWM
USA
95.53%
Other
4.47%
Sectors
IWC
Finance
29.36%
Healthcare
26.12%
Technology
11.19%
Industrials
8.59%
Other
24.74%
IWM
Finance
26.78%
Healthcare
20.22%
Technology
11.82%
Industrials
10.54%
Other
30.64%
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Diversification
IWC
Total weight of top 15 holdings out of 15
6.8%
IWM
Total weight of top 15 holdings out of 15
4.93%
Top 15 holdings
Data as of July 31, 2026
IWC
Penguin Solutions, Inc.
0.61%
Nurix Therapeutics, Inc.
0.53%
Ouster, Inc.
0.52%
MBX Biosciences, Inc.
0.48%
Interface, Inc.
0.46%
CareDx, Inc.
0.46%
SELLAS Life Sciences Group, Inc.
0.46%
Innodata, Inc.
0.45%
Viridian Therapeutics, Inc.
0.42%
UroGen Pharma Ltd.
0.41%
Butterfly Network, Inc.
0.40%
QCR Holdings, Inc.
0.40%
Nuvation Bio, Inc.
0.40%
Ellington Financial, Inc.
0.40%
Monte Rosa Therapeutics, Inc.
0.39%
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%
Frequently asked questions about IWC and IWM
How have the IWC and IWM ETFs performed in 2026?
As of September 8, 2026, IWC is up 24.27% year-to-date (YTD), while IWM has returned 20.11%. That puts IWC better performer ahead so far this year.
Which ETF is attracting more investor money: IWC or IWM?
Year-to-date, the IWC ETF saw +$117M in flows, compared to -$7.28B for IWM.
Which ETF is more volatile: IWC or IWM?
Over the past year, IWC had a volatility of 23.78%, while IWM experienced 18.9%.
Which ETF is bigger: IWC or IWM?
As of September 8, 2026, IWC holds $1.48 B in assets under management (AUM), while IWM manages $79.99 B.
What sectors do the IWC and IWM ETFs invest in?
IWC leans toward sectors like Finance, Healthcare and Technology. Meanwhile, IWM focuses on Finance, Healthcare and Technology.
What are the top holdings of the IWC ETF and IWM ETF?
IWC top holdings include Penguin Solutions, Inc., Nurix Therapeutics, Inc. and Ouster, Inc.. IWM holds in its top three: BlackRock Cash Funds - Treasury, Moog, Inc. and BrightSpring Health Services, Inc..
Which ETF is more diversified: IWC or IWM?
IWC holds 1353 securities with 6.8% of its assets in the top 15. IWM has 1957 securities and a top 15 weight of 4.93%.
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