RESMvsIWMWETF Comparison
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Columbia Research Enhanced Small Cap ETF (RESM) belongs to the US Multi-Factor 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. RESM is less expensive with a Total Expense Ratio (TER) of 0.32%, versus 0.39% for IWMW. RESM is up 20.89% year-to-date (YTD) with -$2M in YTD flows. IWMW performs worse with 13.86% YTD performance, and +$22M in YTD flows. Run a side-by-side ETF comparison of RESM 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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RESM vs IWMW performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 07/30/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | RESM IWMW | -1.52%+0.36% | +6.81%+8.17% | +20.89%+13.86% | n/a+24.27% | n/an/a | n/an/a |
| Flows | RESM IWMW | -+$2M | -+$6M | -$2M+$22M | -+$34M | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | RESM IWMW | +15.34%+10.70% | n/a+12.66% | n/an/a | n/an/a |
| Max drawdown | RESM IWMW | -4.10%-2.57% | n/a-6.92% | n/an/a | n/an/a |
| Max drawdown duration | RESM IWMW | 19d7d | n/a62d | n/an/a | n/an/a |
Trading data
RESM | IWMW | |
Last sale 7/30/2026 at 1:30 PM | $24.05 | $39.58 |
| Previous close 07/30/2026 | $23.81 | $39.07 |
| Consolidated volume 07/30/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of June 30, 2026
1-year trailing difference
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RESM
is actively managed and doesn’t replicate an indexRESM | 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 7/30/2026 at 1:30 PM
Live
Closed
RESM | IWMW | |
|---|---|---|
| Last price | $24.05 | $39.58 |
| 1D performance | +1.01% | +1.30% |
| AuM | $3.61 M | $57.74 M |
| E/R | 0.32% | 0.39% |
Characteristics
RESM | IWMW | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | Columbia Threadneedle Investments | iShares |
| Benchmark | - | Cboe FTSE Russell IWM 2% OTM BuyWrite Index |
| N° of holdings | 1027 | 1962 |
| Asset class | - | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | December 11, 2025 | March 14, 2024 |
| ESG | No | No |
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Exposure
Countries
RESM
USA
93.89%
Other
6.11%
IWMW
USA
96.99%
Other
3.01%
Sectors
RESM
Finance
23.32%
Healthcare
19.62%
Technology
14.45%
Industrials
11.16%
Other
31.45%
IWMW
Finance
26%
Healthcare
20.42%
Technology
13.14%
Industrials
11.71%
Other
28.73%
Diversification
RESM
Total weight of top 15 holdings out of 15
7.08%
IWMW
Total weight of top 15 holdings out of 15
4.94%
Top 15 holdings
Data as of June 30, 2026
RESM
ViaSat, Inc.
0.61%
MaxLinear, Inc.
0.56%
Moog, Inc.
0.53%
UMB Financial Corp.
0.51%
JFrog Ltd.
0.51%
BrightSpring Health Services, Inc.
0.49%
Argan, Inc.
0.48%
CareTrust REIT, Inc.
0.47%
Old National Bancorp
0.44%
FirstCash Holdings, Inc.
0.43%
StoneX Group, Inc.
0.42%
Plexus Corp.
0.42%
ESCO Technologies, Inc.
0.41%
Ryman Hospitality Properties, Inc.
0.39%
ACM Research, Inc.
0.39%
IWMW
Moog, Inc.
0.38%
Hut 8 Corp.
0.38%
ViaSat, Inc.
0.36%
BrightSpring Health Services, Inc.
0.36%
Cytokinetics, Inc.
0.36%
MaxLinear, Inc.
0.35%
Argan, Inc.
0.35%
UMB Financial Corp.
0.33%
JFrog Ltd.
0.31%
Riot Platforms, Inc.
0.31%
Krystal Biotech, Inc.
0.31%
ESCO Technologies, Inc.
0.29%
CareTrust REIT, Inc.
0.29%
Old National Bancorp
0.29%
FirstCash Holdings, Inc.
0.28%
Frequently asked questions about RESM and IWMW
How have the RESM and IWMW ETFs performed in 2026?
As of July 30, 2026, RESM is up 20.89% year-to-date (YTD), while IWMW has returned 13.86%. That puts RESM better performer ahead so far this year.
Which ETF is attracting more investor money: RESM or IWMW?
Year-to-date, the RESM ETF saw -$2M in flows, compared to +$22M for IWMW.
Which ETF is bigger: RESM or IWMW?
As of July 30, 2026, RESM holds $3.61 M in assets under management (AUM), while IWMW manages $57.74 M.
What sectors do the RESM and IWMW ETFs invest in?
RESM leans toward sectors like Finance, Healthcare and Technology. Meanwhile, IWMW focuses on Finance, Healthcare and Technology.
What are the top holdings of the RESM ETF and IWMW ETF?
RESM top holdings include ViaSat, Inc., MaxLinear, Inc. and Moog, Inc.. IWMW holds in its top three: Moog, Inc., Hut 8 Corp. and ViaSat, Inc..
Which ETF is more diversified: RESM or IWMW?
RESM holds 1034 securities with 7.08% of its assets in the top 15. IWMW has 1993 securities and a top 15 weight of 4.94%.
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