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VBKvsIWOETF Comparison

ETF 1

VBK

Vanguard Small-Cap Growth ETF

This fund is part of

US Small Cap Growth

+0.36%

Full VBK fund page

VS

ETF 2

IWO

iShares Russell 2000 Growth ETF

This fund is part of

US Small Cap Growth

+0.36%

Full IWO fund page

Vanguard Small-Cap Growth ETF (VBK) and iShares Russell 2000 Growth ETF (IWO) belong to the same industry segment: US Small Cap Growth. VBK's top 3 sector exposures are Information Technology, Industrials and Health Care. In contrast, IWO's top sector exposures are Health Care, Industrials and Information Technology. VBK is less expensive with a Total Expense Ratio (TER) of 0.05%, versus 0.24% for IWO. VBK is up 8.97% year-to-date (YTD) with -$476M in YTD flows. IWO performs worse with 7.8% YTD performance, and -$862M in YTD flows. Run a side-by-side ETF comparison of VBK and IWO 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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VBK vs IWO 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 04/15/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	VBK IWO	+7.40%+9.32%	+1.37%+0.04%	+8.97%+7.80%	+38.49%+44.20%	+54.14%+55.70%	+18.62%+17.65%
Flows	VBK IWO	+$55M-$246M	+$219M-$775M	-$476M-$862M	-$531M-$1.31B	+$1.53B-$1.03B	+$2.88B-$720M

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	VBK IWO	+24.60%+25.87%	+20.07%+21.80%	+20.93%+22.43%	+23.48%+24.58%
Max drawdown	VBK IWO	-11.37%-14.82%	-11.37%-14.82%	-27.46%-28.47%	-38.36%-40.45%
Max drawdown duration	VBK IWO	82d83d	82d83d	287d280d	1110d1409d

Trading data

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	VBK	IWO
Last sale 4/16/2026 at 1:30 PM	$329.58	$348.67
Previous close 04/15/2026	$328.37	$347.98
Consolidated volume 04/15/2026
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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	VBK	IWO
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 4/16/2026 at 1:30 PM

Live

Closed

	VBK	IWO
Last price	$329.58	$348.67
1D performance	+0.37%	+0.20%
AuM	$21.97 B	$13.37 B
E/R	0.05%	0.24%

Characteristics

	VBK	IWO
Management strategy	Passive	Passive
Provider	Vanguard	iShares
Benchmark	CRSP U.S. Small Cap Growth Index	Russell 2000 Growth Index
N° of holdings	468	902
Asset class	Equities	Equities
Trailing 12m distribution yield	Join	Join
Inception date	January 26, 2004	July 24, 2000
ESG	No	No

More VBK data on Trackinsight

More IWO data on Trackinsight

Exposure

Countries

VBK

USA

92.54%

Other

7.46%

IWO

USA

93.05%

Other

6.95%

Sectors

VBK

Information Techn.

21.62%

Industrials

17.43%

Health Care

15.13%

Consumer Discreti.

9.91%

Other

35.9%

IWO

Health Care

21.29%

Industrials

20.23%

Information Techn.

20.18%

Consumer Discreti.

8.44%

Financials

7.25%

Other

22.61%

Diversification

VBK

Total weight of top 15 holdings out of 15

15.59%

IWO

Total weight of top 15 holdings out of 15

13.71%

Top 15 holdings

Data as of February 28, 2026

VBK

COMFORT SYSTEMS USA

1.53%

LUMENTUM HOLDINGS

1.51%

CIENA

1.49%

US80004C2008

1.42%

US19247G1076

1.23%

US7731211089

1.12%

BLOOM ENERGY CORP

1.00%

KYG3730V1059

0.95%

NATERA

0.83%

TECHNIPFMC PLC

0.81%

CURTISS WRIGHT

0.78%

CASEYS GENERAL STORES

0.77%

ROYAL GOLD

0.77%

WOODWARD

0.70%

ATI INC

0.67%

IWO

BLOOM ENERGY CORP

2.17%

FABRINET

1.26%

CREDO TECHNOLOGY GROUP HOLDING

1.10%

KRATOS DEFENSE AND SECURITY SOLS

0.91%

IONQ

0.83%

STERLING INFRASTRUCTURE INC

0.81%

ADVANCED ENERGY INDUSTRIES

0.81%

US65290E1010

0.78%

ENSIGN GROUP

0.77%

MODINE MNFC CO

0.76%

DYCOM INDUSTRIES

0.75%

GUARDANT HEALTH INC

0.73%

US78473E1038

0.70%

RAMBUS

0.68%

BRIDGEBIO PHARMA

0.67%

Frequently asked questions about VBK and IWO

How have the VBK and IWO ETFs performed in 2026?

As of April 15, 2026, VBK is up 8.97% year-to-date (YTD), while IWO has returned 7.8%. That puts VBK better performer ahead so far this year.

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

Year-to-date, the VBK ETF saw -$476M in flows, compared to -$862M for IWO.

Which ETF is more volatile: VBK or IWO?

Over the past year, VBK had a volatility of 20.07%, while IWO experienced 21.8%.

Which ETF is bigger: VBK or IWO?

As of April 15, 2026, VBK holds $21.97 B in assets under management (AUM), while IWO manages $13.37 B.

What sectors do the VBK and IWO ETFs invest in?

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

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

VBK top holdings include COMFORT SYSTEMS USA, LUMENTUM HOLDINGS and CIENA. IWO holds in its top three: BLOOM ENERGY CORP, FABRINET and CREDO TECHNOLOGY GROUP HOLDING.

VBKvsIWOETF Comparison

Vanguard Small-Cap Growth ETF

iShares Russell 2000 Growth ETF

VBK vs IWO 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 VBK and IWO ETFs performed in 2026?

As of April 15, 2026, VBK is up 8.97% year-to-date (YTD), while IWO has returned 7.8%. That puts VBK better performer ahead so far this year.

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

Year-to-date, the VBK ETF saw -$476M in flows, compared to -$862M for IWO.

Which ETF is more volatile: VBK or IWO?

Over the past year, VBK had a volatility of 20.07%, while IWO experienced 21.8%.

Which ETF is bigger: VBK or IWO?

As of April 15, 2026, VBK holds $21.97 B in assets under management (AUM), while IWO manages $13.37 B.

What sectors do the VBK and IWO ETFs invest in?

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

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

VBK top holdings include COMFORT SYSTEMS USA, LUMENTUM HOLDINGS and CIENA. IWO holds in its top three: BLOOM ENERGY CORP, FABRINET and CREDO TECHNOLOGY GROUP HOLDING.

Which ETF is more diversified: VBK or IWO?

VBK holds 549 securities with 15.59% of its assets in the top 15. IWO has 1089 securities and a top 15 weight of 13.71%.

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