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 12.69% year-to-date (YTD) with -$2M in YTD flows. IWM performs better with 12.8% YTD performance, and -$7.92B 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 10/23/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWC IWM | -5.80%-2.13% | -6.14%-5.28% | +12.69%+12.80% | +14.96%+13.07% | +98.73%+72.87% | +26.58%+27.92% |
| Flows | IWC IWM | -$100M-$328M | -$127M-$1.69B | -$2M-$7.92B | +$47M-$3.36B | -$70M-$3.41B | -$173M-$7.73B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWC IWM | +17.37%+13.94% | +22.96%+18.21% | +24.46%+21.10% | +24.46%+22.45% |
| Max drawdown | IWC IWM | -13.34%-11.10% | -13.34%-11.10% | -29.17%-27.52% | -40.55%-31.96% |
| Max drawdown duration | IWC IWM | 68d68d | 68d68d | 233d289d | 1409d1093d |
Trading data
IWC | IWM | |
Last sale 10/23/2026 at 1:30 PM | $176.36 | $275.75 |
| Previous close 10/22/2026 | $177.59 | $276.67 |
| Consolidated volume 10/22/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 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 | ||
Main metrics
Last update 10/23/2026 at 1:30 PM
Live
Closed
IWC | IWM | |
|---|---|---|
| Last price | $176.36 | $275.75 |
| 1D performance | -0.69% | -0.33% |
| AuM | $1.23 B | $74.21 B |
| E/R | 0.6% | 0.19% |
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Exposure
Countries
IWC
USA
97.67%
Other
2.33%
IWM
USA
94.99%
Other
5.01%
Sectors
IWC
Finance
28.98%
Healthcare
27.18%
Technology
10.72%
Industrials
8.71%
Other
24.41%
IWM
Finance
26.05%
Healthcare
20.69%
Technology
11.8%
Industrials
10.33%
Other
31.12%
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Diversification
IWC
Total weight of top 15 holdings out of 15
7.17%
IWM
Total weight of top 15 holdings out of 15
4.62%
Top 15 holdings
Data as of August 31, 2026
IWC
CareDx, Inc.
0.60%
SELLAS Life Sciences Group, Inc.
0.58%
Nurix Therapeutics, Inc.
0.57%
Penguin Solutions, Inc.
0.57%
Interface, Inc.
0.51%
Ouster, Inc.
0.50%
BlackRock Cash Funds - Treasury
0.50%
Viridian Therapeutics, Inc.
0.49%
MBX Biosciences, Inc.
0.44%
UroGen Pharma Ltd.
0.43%
Innodata, Inc.
0.42%
Nuvation Bio, Inc.
0.39%
QCR Holdings, Inc.
0.39%
Ellington Financial, Inc.
0.39%
Butterfly Network, Inc.
0.39%
IWM
JFrog Ltd.
0.35%
Moog, Inc.
0.34%
UMB Financial Corp.
0.34%
Glaukos Corp.
0.33%
BlackRock Cash Funds - Treasury
0.33%
Brinker International, Inc.
0.32%
BrightSpring Health Services, Inc.
0.30%
Krystal Biotech, Inc.
0.30%
Cytokinetics, Inc.
0.30%
Old National Bancorp
0.29%
Protagonist Therapeutics, Inc.
0.29%
SM Energy Co.
0.29%
Twist Bioscience Corp.
0.28%
FirstCash Holdings, Inc.
0.28%
CareTrust REIT, Inc.
0.28%
Frequently asked questions about IWC and IWM
How have the IWC and IWM ETFs performed in 2026?
As of October 23, 2026, IWC is up 12.69% year-to-date (YTD), while IWM has returned 12.8%. That puts IWM better performer ahead so far this year.
Which ETF is attracting more investor money: IWC or IWM?
Year-to-date, the IWC ETF saw -$2M in flows, compared to -$7.92B for IWM.
Which ETF is more volatile: IWC or IWM?
Over the past year, IWC had a volatility of 22.96%, while IWM experienced 18.21%.
Which ETF is bigger: IWC or IWM?
As of October 23, 2026, IWC holds $1.23 B in assets under management (AUM), while IWM manages $74.21 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 CareDx, Inc., SELLAS Life Sciences Group, Inc. and Nurix Therapeutics, Inc.. IWM holds in its top three: JFrog Ltd., Moog, Inc. and UMB Financial Corp..
Which ETF is more diversified: IWC or IWM?
IWC holds 1346 securities with 7.17% of its assets in the top 15. IWM has 1953 securities and a top 15 weight of 4.62%.
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