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Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

HYMB vs MBB: how they differ

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

State Street(R) SPDR Nuveen ICE High Yield Municipal Bond ETF and iShares MBS ETF.

What they hold in common

By the books each fund has filed, HYMB and MBB 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 HYMBOnly in MBB
Puerto Rico Sales Tax Financing Corp Sal 2.53%BLACKROCK CASH CL INST SL AGENCY 7.26%
Puerto Rico Sales Tax Financing Corp Sal 1.54%GNMA2 SF 30YR 0.09%
Buckeye Tobacco Settlement Financing Aut 1.27%GNMA II 30YR SF - JUMBO-CONFORMING 0.08%
Commonwealth of Puerto Rico 0.64%GNMA2 SINGLE FAMILY 30YR 0.04%
Puerto Rico Sales Tax Financing Corp Sal 0.62%GNMA II 30YR 0.03%
Commonwealth of Puerto Rico 0.55%GNMA2 30YR TBA(REG C) 0.03%
New York Liberty Development Corp 0.47%UMBS 15YR TBA(REG B) 0.03%
Metropolitan Pier & Exposition Authority 0.43%FNMA 30YR UMBS MEGA REMIC SUPER 0.02%

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 Sep 10, 2026.

HYMB and MBB on the fields both publish, as of Sep 13, 2026. Source: ETFIQ.
HYMB
State Street(R) SPDR Nuveen ICE High Yield Municipal Bond ETF
MBB
iShares MBS ETF
Where it sitsCore index fundCore index fund
IssuerState StreetiShares
What it isSPDR Nuveen ICE High Yield Municipal BondMbs
Total return, 1 year+1.7%−0.1%
S&P 500 over the same days+17.5%+17.5%
Gap to the S&P 500−15.8 pts−17.6 pts
Expense ratio0.35%0.04%
Holdings18672599

HYMB in plain words

HYMB is a bond fund tracking the SPDR Nuveen ICE High Yield Municipal Bond. Over the year to Sep 11, 2026 it returned +1.7% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.35% a year. It sat 3.8% below its high of Jul 2, 2026 on Sep 11, 2026.

MBB in plain words

MBB is a bond fund tracking the Mbs. 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 0.04% a year. It sat 3.3% below its high of Feb 27, 2026 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, HYMB or MBB?
In the year to Sep 13, 2026, with distributions reinvested, HYMB returned +1.7% and MBB returned −0.1%, so HYMB returned more. One year is one year; the longer windows are in the table.
Which is cheaper, HYMB or MBB?
HYMB charges 0.35% a year and MBB charges 0.04%, so MBB 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.

HYMB against MBB, ETFIQ, data as of Sep 13, 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, HYMB against MBB, data as of Sep 13, 2026. https://etfiq.com/compare/any/hymb-vs-mbb Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources