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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

MBB vs PULS: how they differ

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

iShares MBS ETF and PGIM Ultra Short Bond ETF.

What they hold in common

By the books each fund has filed, MBB and PULS 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 MBBOnly in PULS
BLACKROCK CASH CL INST SL AGENCY 7.26%PGIM ETF Trust 2.38%
GNMA2 SF 30YR 0.09%GLENCORE FUNDING LLC 0.98%
GNMA II 30YR SF - JUMBO-CONFORMING 0.08%Alexandria Real Estate Equities, Inc. 0.87%
GNMA2 SINGLE FAMILY 30YR 0.04%ABN AMRO BANK NV 0.75%
GNMA II 30YR 0.03%BX TRUST 2022-LBA6 0.68%
GNMA2 30YR TBA(REG C) 0.03%FEDERATION DES CAISSES DESJARDINS DU QUE 0.67%
UMBS 15YR TBA(REG B) 0.03%BX TRUST 2018-BILT 0.56%
FNMA 30YR UMBS MEGA REMIC SUPER 0.02%BROADCOM INC 0.56%

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 May 29, 2026 and Sep 10, 2026.

MBB and PULS on the fields both publish, as of Sep 13, 2026. Source: ETFIQ.
MBB
iShares MBS ETF
PULS
PGIM Ultra Short Bond ETF
Where it sitsCore index fundCore index fund
IssueriSharesPGIM
What it isMbsPGIM Ultra Short Bond
Total return, 1 year−0.1%+4.2%
S&P 500 over the same days+17.5%+17.5%
Gap to the S&P 500−17.6 pts−13.3 pts
Expense ratio0.04%0.15%
Holdings2599553

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.

PULS in plain words

PULS is a cash and treasury bills tracking the PGIM Ultra Short Bond. Over the year to Sep 11, 2026 it returned +4.2% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.15% a year.

Questions people ask

Which returned more over the last year, MBB or PULS?
In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and PULS returned +4.2%, so PULS returned more. One year is one year; the longer windows are in the table.
Which is cheaper, MBB or PULS?
MBB charges 0.04% a year and PULS charges 0.15%, so MBB is cheaper. Fees come from each fund's prospectus.

Other comparisons

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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.

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

A comparison is not a recommendation. Standards and sources