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IWMWvsRESMETF Comparison

ETF 1

IWMW

iShares Russell 2000 BuyWrite ETF

This fund is part of

Options Strategies

+0.07%

Full IWMW fund page

VS

ETF 2

RESM

Columbia Research Enhanced Small Cap ETF

This fund is part of

US Multi-Factor

+0.09%

Full RESM fund page

iShares Russell 2000 BuyWrite ETF (IWMW) belongs to the Options Strategies segment. Columbia Research Enhanced Small Cap ETF (RESM) is part of the US Multi-Factor segment. IWMW's top 3 sector exposures are Industrials, Health Care and Financials. In contrast, RESM's top sector exposures are Industrials, Information Technology and Health Care. IWMW is more expensive with a Total Expense Ratio (TER) of 0.39%, versus 0.32% for RESM. IWMW is up 5.6% year-to-date (YTD) with +$16M in YTD flows. RESM performs better with 13.19% YTD performance, and -$2M in YTD flows. Run a side-by-side ETF comparison of IWMW 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.

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IWMW vs RESM performance and flow charts

Performance

Cumulative Flows

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Daily, global ETF data for advanced analysis or integration into apps (API), from our partner Trackinsight.

Data Services

Historic performance and flows

Data as of 05/01/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	IWMW RESM	+4.98%+13.64%	+3.11%+8.11%	+5.60%+13.19%	+23.80%n/a	n/an/a	n/an/a
Flows	IWMW RESM	+$3M+$1K	+$7M-$2M	+$16M-$2M	+$30M-	--	--

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	IWMW RESM	+15.67%+19.40%	+12.31%n/a	n/an/a	n/an/a
Max drawdown	IWMW RESM	-6.92%-8.43%	-6.92%n/a	n/an/a	n/an/a
Max drawdown duration	IWMW RESM	62d43d	62dn/a	n/an/a	n/an/a

Trading data

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	IWMW	RESM
Last sale 5/1/2026 at 1:30 PM	$38.69	$22.58
Previous close 04/29/2026	$38.53	$22.52
Consolidated volume 04/29/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of April 30, 2026

1-year trailing difference

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RESM

is actively managed and doesn’t replicate an index

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	IWMW	RESM
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 5/1/2026 at 1:30 PM

Live

Closed

	IWMW	RESM
Last price	$38.69	$22.58
1D performance	+0.41%	+0.26%
AuM	$51.00 M	$3.38 M
E/R	0.39%	0.32%

Characteristics

	IWMW	RESM
Management strategy	Passive	Active
Provider	iShares	Columbia Threadneedle Investments
Benchmark	Cboe FTSE Russell IWM 2% OTM BuyWrite Index	-
N° of holdings	1612	855
Asset class	-	-
Trailing 12m distribution yield	Join	Join
Inception date	March 14, 2024	December 11, 2025
ESG	No	No

More IWMW data on Trackinsight

More RESM data on Trackinsight

Exposure

Countries

IWMW

USA

93.98%

Other

6.02%

RESM

USA

83.23%

Other

16.77%

Sectors

IWMW

Industrials

15.67%

Health Care

15.36%

Financials

14.76%

Information Techn.

14.35%

Consumer Discreti.

8.57%

Other

31.3%

RESM

Industrials

16.01%

Information Techn.

14.77%

Health Care

13.83%

Financials

13.8%

Consumer Discreti.

8.28%

Other

33.31%

Diversification

IWMW

Total weight of top 15 holdings out of 15

7.64%

RESM

Total weight of top 15 holdings out of 15

8.32%

Top 15 holdings

Data as of March 31, 2026

IWMW

BLOOM ENERGY CORP

1.02%

COEUR MINING INC

0.66%

FABRINET

0.65%

US65290E1010

0.61%

ECHOSTAR

0.55%

CREDO TECHNOLOGY GROUP HOLDING

0.52%

KRATOS DEFENSE AND SECURITY SOLS

0.44%

ADVANCED ENERGY INDUSTRIES

0.42%

STERLING INFRASTRUCTURE INC

0.42%

HECLA MINING

0.41%

BRIDGEBIO PHARMA

0.41%

GUARDANT HEALTH INC

0.40%

MODINE MNFC CO

0.39%

ENSIGN GROUP

0.39%

TTM TECHNOLOGIES

0.35%

RESM

FABRINET

0.97%

STERLING INFRASTRUCTURE INC

0.66%

LEXINGTON REIT

0.64%

ADVANCED ENERGY INDUSTRIES

0.63%

ENSIGN GROUP

0.57%

DYCOM INDUSTRIES

0.53%

HECLA MINING

0.53%

CHART INDUSTRIES

0.51%

TTM TECHNOLOGIES

0.51%

COEUR MINING INC

0.51%

IES HOLDINGS

0.50%

RAMBUS

0.48%

WTTS WTER TECH

0.43%

FIRSTCASH HOLDINGS INC

0.43%

PRIMORIS SERVICES

0.42%

Frequently asked questions about IWMW and RESM

How have the IWMW and RESM ETFs performed in 2026?

As of May 1, 2026, IWMW is up 5.6% year-to-date (YTD), while RESM has returned 13.19%. That puts RESM better performer ahead so far this year.

Which ETF is attracting more investor money: IWMW or RESM?

Year-to-date, the IWMW ETF saw +$16M in flows, compared to -$2M for RESM.

Which ETF is bigger: IWMW or RESM?

As of May 1, 2026, IWMW holds $51.00 M in assets under management (AUM), while RESM manages $3.38 M.

What sectors do the IWMW and RESM ETFs invest in?

IWMW leans toward sectors like Industrials, Health Care and Financials. Meanwhile, RESM focuses on Industrials, Information Technology and Health Care.

What are the top holdings of the IWMW ETF and RESM ETF?

IWMW top holdings include BLOOM ENERGY CORP, COEUR MINING INC and FABRINET. RESM holds in its top three: FABRINET, STERLING INFRASTRUCTURE INC and LEXINGTON REIT.

IWMWvsRESMETF Comparison

iShares Russell 2000 BuyWrite ETF

Columbia Research Enhanced Small Cap ETF

IWMW vs RESM performance and flow charts

Performance

Cumulative Flows

Get all the metrics on this page, and more, through a reliable ETF data feed

Countries

Sectors

Diversification

Top 15 holdings

How have the IWMW and RESM ETFs performed in 2026?

As of May 1, 2026, IWMW is up 5.6% year-to-date (YTD), while RESM has returned 13.19%. That puts RESM better performer ahead so far this year.

Which ETF is attracting more investor money: IWMW or RESM?

Year-to-date, the IWMW ETF saw +$16M in flows, compared to -$2M for RESM.

Which ETF is bigger: IWMW or RESM?

As of May 1, 2026, IWMW holds $51.00 M in assets under management (AUM), while RESM manages $3.38 M.

What sectors do the IWMW and RESM ETFs invest in?

IWMW leans toward sectors like Industrials, Health Care and Financials. Meanwhile, RESM focuses on Industrials, Information Technology and Health Care.

What are the top holdings of the IWMW ETF and RESM ETF?

IWMW top holdings include BLOOM ENERGY CORP, COEUR MINING INC and FABRINET. RESM holds in its top three: FABRINET, STERLING INFRASTRUCTURE INC and LEXINGTON REIT.

Which ETF is more diversified: IWMW or RESM?

IWMW holds 1934 securities with 7.64% of its assets in the top 15. RESM has 869 securities and a top 15 weight of 8.32%.

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