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IWOvsRZGETF Comparison

ETF 1

IWO

iShares Russell 2000 Growth ETF

This fund is part of

US Small Cap Growth

-0.22%

Full IWO fund page

VS

ETF 2

RZG

Invesco S&P SmallCap 600® Pure Growth ETF

This fund is part of

US Small Cap Growth

-0.22%

Full RZG fund page

iShares Russell 2000 Growth ETF (IWO) and Invesco S&P SmallCap 600® Pure Growth ETF (RZG) belong to the same industry segment: US Small Cap Growth. IWO's top 3 sector exposures are Health Care, Information Technology and Industrials. In contrast, RZG's top sector exposures are Health Care, Industrials and Financials. IWO is less expensive with a Total Expense Ratio (TER) of 0.24%, versus 0.35% for RZG. IWO is up 10.61% year-to-date (YTD) with -$809M in YTD flows. RZG performs better with 17.14% YTD performance, and -$35K in YTD flows. Run a side-by-side ETF comparison of IWO and RZG 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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IWO vs RZG 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 04/27/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	IWO RZG	+16.32%+14.85%	+3.32%+10.13%	+10.61%+17.14%	+41.72%+38.86%	+64.12%+71.33%	+17.90%+23.70%
Flows	IWO RZG	-$129M-	-$530M-$584K	-$809M-$35K	-$1.22B-$12M	-$1.05B-$18M	-$576M-$30M

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	IWO RZG	+25.63%+22.16%	+21.38%+18.56%	+22.42%+20.45%	+24.55%+22.90%
Max drawdown	IWO RZG	-12.94%-8.37%	-14.82%-8.40%	-28.47%-25.62%	-40.45%-38.45%
Max drawdown duration	IWO RZG	76d40d	84d43d	280d296d	1409d1521d

Trading data

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	IWO	RZG
Last sale 4/28/2026 at 1:30 PM	$351.50	$63.04
Previous close 04/27/2026	$357.83	$63.57
Consolidated volume 04/27/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of March 31, 2026

1-year trailing difference

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	IWO	RZG
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 4/28/2026 at 1:30 PM

Live

Closed

	IWO	RZG
Last price	$351.50	$63.04
1D performance	-1.77%	-0.84%
AuM	$13.78 B	$120.74 M
E/R	0.24%	0.35%

Characteristics

	IWO	RZG
Management strategy	Passive	Passive
Provider	iShares	Invesco
Benchmark	Russell 2000 Growth Index	S&P SmallCap 600 Pure Growth Index
N° of holdings	897	120
Asset class	Equities	Equities
Trailing 12m distribution yield	Join	Join
Inception date	July 24, 2000	March 1, 2006
ESG	No	No

More IWO data on Trackinsight

More RZG data on Trackinsight

Exposure

Countries

IWO

USA

93.17%

Other

6.83%

RZG

USA

96.12%

Other

3.88%

Sectors

IWO

Health Care

21.43%

Information Techn.

20.12%

Industrials

19.42%

Consumer Discreti.

8.17%

Financials

7.05%

Other

23.81%

RZG

Health Care

19.78%

Industrials

19.44%

Financials

15.45%

Information Techn.

13.71%

Consumer Discreti.

9.96%

Other

21.65%

Diversification

IWO

Total weight of top 15 holdings out of 15

13.39%

RZG

Total weight of top 15 holdings out of 15

22.09%

Top 15 holdings

Data as of March 31, 2026

IWO

BLOOM ENERGY CORP

1.99%

FABRINET

1.26%

CREDO TECHNOLOGY GROUP HOLDING

1.02%

US65290E1010

0.94%

KRATOS DEFENSE AND SECURITY SOLS

0.86%

ADVANCED ENERGY INDUSTRIES

0.82%

STERLING INFRASTRUCTURE INC

0.81%

BRIDGEBIO PHARMA

0.79%

GUARDANT HEALTH INC

0.77%

MODINE MNFC CO

0.76%

ENSIGN GROUP

0.76%

IONQ

0.67%

DYCOM INDUSTRIES

0.66%

US78473E1038

0.65%

COEUR MINING INC

0.64%

RZG

ARGAN

1.78%

DIGITALOCEAN HOLDINGS

1.64%

CLEAR SECURE

1.62%

POWELL INDUSTRIES

1.58%

PROTAGONIST THERAPEUTICS INC

1.58%

PHIBRO ANIMAL /D

1.55%

ACM RESEARCH

1.48%

PRIMORIS SERVICES

1.46%

PTC THERAPEUTI/D

1.41%

DXP ENTERPRISES

1.40%

STONEX GROUP INC

1.35%

TIDEWATER

1.33%

US00676P1075

1.33%

US6496048405

1.29%

US0423157058

1.28%

Frequently asked questions about IWO and RZG

How have the IWO and RZG ETFs performed in 2026?

As of April 27, 2026, IWO is up 10.61% year-to-date (YTD), while RZG has returned 17.14%. That puts RZG better performer ahead so far this year.

Which ETF is attracting more investor money: IWO or RZG?

Year-to-date, the IWO ETF saw -$809M in flows, compared to -$35K for RZG.

Which ETF is more volatile: IWO or RZG?

Over the past year, IWO had a volatility of 21.38%, while RZG experienced 18.56%.

Which ETF is bigger: IWO or RZG?

As of April 27, 2026, IWO holds $13.78 B in assets under management (AUM), while RZG manages $120.74 M.

What sectors do the IWO and RZG ETFs invest in?

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

What are the top holdings of the IWO ETF and RZG ETF?

IWO top holdings include BLOOM ENERGY CORP, FABRINET and CREDO TECHNOLOGY GROUP HOLDING. RZG holds in its top three: ARGAN, DIGITALOCEAN HOLDINGS and CLEAR SECURE.

IWOvsRZGETF Comparison

iShares Russell 2000 Growth ETF

Invesco S&P SmallCap 600® Pure Growth ETF

IWO vs RZG 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 IWO and RZG ETFs performed in 2026?

As of April 27, 2026, IWO is up 10.61% year-to-date (YTD), while RZG has returned 17.14%. That puts RZG better performer ahead so far this year.

Which ETF is attracting more investor money: IWO or RZG?

Year-to-date, the IWO ETF saw -$809M in flows, compared to -$35K for RZG.

Which ETF is more volatile: IWO or RZG?

Over the past year, IWO had a volatility of 21.38%, while RZG experienced 18.56%.

Which ETF is bigger: IWO or RZG?

As of April 27, 2026, IWO holds $13.78 B in assets under management (AUM), while RZG manages $120.74 M.

What sectors do the IWO and RZG ETFs invest in?

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

What are the top holdings of the IWO ETF and RZG ETF?

IWO top holdings include BLOOM ENERGY CORP, FABRINET and CREDO TECHNOLOGY GROUP HOLDING. RZG holds in its top three: ARGAN, DIGITALOCEAN HOLDINGS and CLEAR SECURE.

Which ETF is more diversified: IWO or RZG?

IWO holds 1099 securities with 13.39% of its assets in the top 15. RZG has 131 securities and a top 15 weight of 22.09%.

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