Which returned more over the last year, IWO or MUB?

In the year to Sep 12, 2026, with distributions reinvested, IWO returned +17.0% and MUB returned +0.1%, so IWO returned more. One year is one year; the longer windows are in the table.

Which is cheaper, IWO or MUB?

IWO charges 0.24% a year and MUB charges 0.05%, so MUB is cheaper. Fees come from each fund's prospectus.

Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

IWO vs MUB: how they differ

IWO and MUB hold 0% of their weight in the same names, and IWO returned more over the year.

iShares Russell 2000 Growth ETF and iShares National Muni Bond ETF.

What they hold in common

By the books each fund has filed, IWO and MUB hold 0% of their money in the same securities at the same weight.

Largest positions each one holds and the other does not
Only in IWO	Only in MUB
Moog, Inc. 0.73%	Board of Regents of the University of Te 0.20%
BrightSpring Health Services, Inc. 0.68%	New York State Thruway Authority 0.16%
MaxLinear, Inc. 0.67%	New York State Dormitory Authority 0.14%
Argan, Inc. 0.66%	Houston Higher Education Finance Corp. 0.13%
JFrog Ltd. 0.60%	Northwest Independent School District 0.13%
Krystal Biotech, Inc. 0.58%	Ohio State University (The) 0.13%
ESCO Technologies, Inc. 0.56%	State of New Jersey 0.13%
FirstCash Holdings, Inc. 0.54%	State of California 0.13%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026 and May 31, 2026.

IWO and MUB on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	IWO iShares Russell 2000 Growth ETF	MUB iShares National Muni Bond ETF
Where it sits	Core index fund	Core index fund
Issuer	iShares	iShares
What it is	Russell 2000 Growth	National Muni Bond
Total return, 1 year	+17.0%	+0.1%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−0.5 pts	−17.4 pts
Expense ratio	0.24%	0.05%
Holdings	1133	6603

IWO in plain words

IWO is an index equity fund tracking the Russell 2000 Growth. Over the year to Sep 11, 2026 it returned +17.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.24% a year. By its holdings filed for Jun 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 1133 positions, with the top ten at 6.1%. It sat 7.1% below its high of Aug 14, 2026 on Sep 11, 2026.

MUB in plain words

MUB is a bond fund tracking the National Muni Bond. Over the year to Sep 11, 2026 it returned +0.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.05% a year. It sat 3.6% below its high of Jul 6, 2026 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, IWO or MUB?: In the year to Sep 12, 2026, with distributions reinvested, IWO returned +17.0% and MUB returned +0.1%, so IWO returned more. One year is one year; the longer windows are in the table.
Which is cheaper, IWO or MUB?: IWO charges 0.24% a year and MUB charges 0.05%, so MUB is cheaper. Fees come from each fund's prospectus.

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Where these figures came from

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.

IWO against MUB, ETFIQ, data as of Sep 12, 2026. Every figure is arithmetic on a named public source; the method is at etfiq.com/methodology. A comparison is not a recommendation.

Cite this page. ETFIQ, IWO against MUB, data as of Sep 12, 2026. https://etfiq.com/compare/any/IWO-MUB Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources