IWMvsBBSCETF Comparison
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iShares Russell 2000 ETF (IWM) and JPMorgan BetaBuilders U.S. Small Cap Equity ETF (BBSC) belong to the same industry segment: US Small Cap. Both ETFs have the same top 3 sector exposures: Finance, Healthcare and Technology. IWM is more expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.09% for BBSC. IWM is up 12.8% year-to-date (YTD) with -$7.92B in YTD flows. BBSC performs better with 14.8% YTD performance, and +$50M in YTD flows. Run a side-by-side ETF comparison of IWM and BBSC 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 BBSC performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/23/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWM BBSC | -2.13%-1.53% | -5.28%-4.59% | +12.80%+14.80% | +13.07%+13.71% | +72.87%+78.09% | +27.92%+33.34% |
| Flows | IWM BBSC | -$328M+$24M | -$1.69B+$69M | -$7.92B+$50M | -$3.36B+$59M | -$3.41B-$239M | -$7.73B+$88M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWM BBSC | +13.94%+13.86% | +18.21%+17.44% | +21.10%+21.57% | +22.45%+22.85% |
| Max drawdown | IWM BBSC | -11.10%-10.67% | -11.10%-10.67% | -27.52%-29.10% | -31.96%-30.97% |
| Max drawdown duration | IWM BBSC | 68d68d | 68d68d | 289d296d | 1093d1072d |
Trading data
IWM | BBSC | |
Last sale 10/26/2026 at 1:30 PM | $276.99 | |
| Previous close 10/23/2026 | $275.75 | |
| Consolidated volume 10/23/2026 | ||
| 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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IWM | BBSC | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/26/2026 at 1:30 PM
Live
Closed
IWM | BBSC | |
|---|---|---|
| Last price | $276.99 | – |
| 1D performance | +0.45% | – |
| AuM | $74.21 B | $729.73 M |
| E/R | 0.19% | 0.09% |
Characteristics
IWM | BBSC | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | J.P. Morgan Asset Management |
| Benchmark | Russell 2000 Index | Morningstar US Small Cap Target Market Exposure Extended Index |
| N° of holdings | 1940 | 846 |
| Asset class | Equities | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 22, 2000 | November 16, 2020 |
| ESG | No | No |
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Exposure
Countries
IWM
USA
94.99%
Other
5.01%
BBSC
USA
96.87%
Other
3.13%
Sectors
IWM
Finance
26.05%
Healthcare
20.69%
Technology
11.8%
Industrials
10.33%
Other
31.12%
BBSC
Finance
25.22%
Healthcare
17.8%
Technology
14.72%
Industrials
10.59%
Other
31.66%
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Diversification
IWM
Total weight of top 15 holdings out of 15
4.62%
BBSC
Total weight of top 15 holdings out of 15
5.75%
Top 15 holdings
Data as of August 31, 2026
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%
Protagonist Therapeutics, Inc.
0.29%
Old National Bancorp
0.29%
SM Energy Co.
0.29%
Twist Bioscience Corp.
0.28%
FirstCash Holdings, Inc.
0.28%
CareTrust REIT, Inc.
0.28%
BBSC
Semtech Corp.
0.51%
Corcept Therapeutics, Inc.
0.44%
Arrowhead Pharmaceuticals, Inc.
0.42%
Moog, Inc.
0.42%
American Healthcare REIT, Inc.
0.42%
JFrog Ltd.
0.41%
Brinker International, Inc.
0.38%
Twist Bioscience Corp.
0.36%
Krystal Biotech, Inc.
0.35%
BrightSpring Health Services, Inc.
0.35%
DigitalOcean Holdings, Inc.
0.35%
Crinetics Pharmaceuticals, Inc.
0.34%
SM Energy Co.
0.34%
FormFactor, Inc.
0.33%
CareTrust REIT, Inc.
0.33%
Frequently asked questions about IWM and BBSC
How have the IWM and BBSC ETFs performed in 2026?
As of October 23, 2026, IWM is up 12.8% year-to-date (YTD), while BBSC has returned 14.8%. That puts BBSC better performer ahead so far this year.
Which ETF is attracting more investor money: IWM or BBSC?
Year-to-date, the IWM ETF saw -$7.92B in flows, compared to +$50M for BBSC.
Which ETF is more volatile: IWM or BBSC?
Over the past year, IWM had a volatility of 18.21%, while BBSC experienced 17.44%.
Which ETF is bigger: IWM or BBSC?
As of October 23, 2026, IWM holds $74.21 B in assets under management (AUM), while BBSC manages $729.73 M.
What sectors do the IWM and BBSC ETFs invest in?
IWM leans toward sectors like Finance, Healthcare and Technology. Meanwhile, BBSC focuses on Finance, Healthcare and Technology.
What are the top holdings of the IWM ETF and BBSC ETF?
IWM top holdings include JFrog Ltd., Moog, Inc. and UMB Financial Corp.. BBSC holds in its top three: Semtech Corp., Corcept Therapeutics, Inc. and Arrowhead Pharmaceuticals, Inc..
Which ETF is more diversified: IWM or BBSC?
IWM holds 1953 securities with 4.62% of its assets in the top 15. BBSC has 850 securities and a top 15 weight of 5.75%.
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Latest news about IWM & BBSC
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