IWMvsRESMETF Comparison
VS
iShares Russell 2000 ETF (IWM) belongs to the US Small Cap segment. Columbia Research Enhanced Small Cap ETF (RESM) is part of the US Multi-Factor 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 0.32% for RESM. IWM is up 12.8% year-to-date (YTD) with -$7.92B in YTD flows. RESM performs better with 16.75% YTD performance, and +$397K in YTD flows. Run a side-by-side ETF comparison of IWM and RESM below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
Find out how industry players manage ETF portfolios. Discover our library of Model portfolios
IWM vs RESM 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 RESM | -2.13%+0.25% | -5.28%-2.90% | +12.80%+16.75% | +13.07%n/a | +72.87%n/a | +27.92%n/a |
| Flows | IWM RESM | -$328M- | -$1.69B+$2M | -$7.92B+$397K | -$3.36B- | -$3.41B- | -$7.73B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWM RESM | +13.94%+12.14% | +18.21%n/a | +21.10%n/a | +22.45%n/a |
| Max drawdown | IWM RESM | -11.10%-9.03% | -11.10%n/a | -27.52%n/a | -31.96%n/a |
| Max drawdown duration | IWM RESM | 68d68d | 68dn/a | 289dn/a | 1093dn/a |
Trading data
IWM | RESM | |
Last sale 10/23/2026 at 1:30 PM | $275.75 | $23.22 |
| Previous close 10/22/2026 | $276.67 | $23.26 |
| 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
Create an account to view replication metrics
Join for free
RESM
is actively managed and doesn’t replicate an indexIWM | RESM | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
Advertisement
Main metrics
Last update 10/23/2026 at 1:30 PM
Live
Closed
IWM | RESM | |
|---|---|---|
| Last price | $275.75 | $23.22 |
| 1D performance | -0.33% | -0.19% |
| AuM | $74.21 B | $5.81 M |
| E/R | 0.19% | 0.32% |
Characteristics
IWM | RESM | |
|---|---|---|
| Management strategy | Passive | Active |
| Provider | iShares | Columbia Threadneedle Investments |
| Benchmark | Russell 2000 Index | - |
| N° of holdings | 1940 | 1013 |
| Asset class | Equities | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 22, 2000 | December 11, 2025 |
| ESG | No | No |
Exposure
Countries
IWM
USA
94.99%
Other
5.01%
RESM
USA
93.96%
Other
6.04%
Sectors
IWM
Finance
26.05%
Healthcare
20.69%
Technology
11.8%
Industrials
10.33%
Other
31.12%
RESM
Finance
24.46%
Healthcare
20.2%
Technology
13.36%
Industrials
10.11%
Other
31.87%
Advertisement
Diversification
IWM
Total weight of top 15 holdings out of 15
4.62%
RESM
Total weight of top 15 holdings out of 15
6.79%
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%
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%
RESM
JFrog Ltd.
0.58%
UMB Financial Corp.
0.52%
ViaSat, Inc.
0.50%
Moog, Inc.
0.49%
Glaukos Corp.
0.48%
Columbia Short Term Cash Fund
0.46%
CareTrust REIT, Inc.
0.46%
InterDigital, Inc.
0.45%
FirstCash Holdings, Inc.
0.45%
Old National Bancorp
0.44%
BrightSpring Health Services, Inc.
0.43%
Brinker International, Inc.
0.40%
Ryman Hospitality Properties, Inc.
0.39%
StoneX Group, Inc.
0.37%
Silicon Laboratories, Inc.
0.37%
Frequently asked questions about IWM and RESM
How have the IWM and RESM ETFs performed in 2026?
As of October 23, 2026, IWM is up 12.8% year-to-date (YTD), while RESM has returned 16.75%. That puts RESM better performer ahead so far this year.
Which ETF is attracting more investor money: IWM or RESM?
Year-to-date, the IWM ETF saw -$7.92B in flows, compared to +$397K for RESM.
Which ETF is bigger: IWM or RESM?
As of October 23, 2026, IWM holds $74.21 B in assets under management (AUM), while RESM manages $5.81 M.
What sectors do the IWM and RESM ETFs invest in?
IWM leans toward sectors like Finance, Healthcare and Technology. Meanwhile, RESM focuses on Finance, Healthcare and Technology.
What are the top holdings of the IWM ETF and RESM ETF?
IWM top holdings include JFrog Ltd., Moog, Inc. and UMB Financial Corp.. RESM holds in its top three: JFrog Ltd., UMB Financial Corp. and ViaSat, Inc..
Which ETF is more diversified: IWM or RESM?
IWM holds 1953 securities with 4.62% of its assets in the top 15. RESM has 1016 securities and a top 15 weight of 6.79%.
Advertisement
Latest news about IWM & RESM
