Which returned more over the last year, MBB or MTUM?

In the year to Sep 12, 2026, with distributions reinvested, MBB returned −0.1% and MTUM returned +21.8%, so MTUM returned more. One year is one year; the longer windows are in the table.

Which is cheaper, MBB or MTUM?

MBB charges 0.04% a year and MTUM charges 0.15%, so MBB 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

MBB vs MTUM: how they differ

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

iShares MBS ETF and iShares MSCI USA Momentum Factor ETF.

What they hold in common

By the books each fund has filed, MBB and MTUM 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 MBB	Only in MTUM
Freddie Mac 1.07%	MICRON TECHNOLOGY, INC. 5.57%
Government National Mortgage Association 0.97%	BROADCOM INC. 5.41%
UMBS, TBA 0.85%	NVIDIA CORPORATION 4.65%
Government National Mortgage Association 0.69%	ADVANCED MICRO DEVICES, INC. 4.04%
UMBS, TBA 0.66%	INTEL CORPORATION 3.84%
Government National Mortgage Association 0.56%	JOHNSON & JOHNSON 3.76%
Government National Mortgage Association 0.55%	LAM RESEARCH CORPORATION 3.62%
Government National Mortgage Association 0.54%	EXXON MOBIL CORPORATION 3.44%

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 Apr 30, 2026 and May 31, 2026.

MBB and MTUM on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	MBB iShares MBS ETF	MTUM iShares MSCI USA Momentum Factor ETF
Where it sits	Core index fund	Core index fund
Issuer	iShares	iShares
What it is	Mbs	MSCI USA Momentum Factor
Total return, 1 year	−0.1%	+21.8%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−17.6 pts	+4.3 pts
Expense ratio	0.04%	0.15%
Holdings	11144	125

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.

MTUM in plain words

MTUM is an index equity fund tracking the MSCI USA Momentum Factor. Over the year to Sep 11, 2026 it returned +21.8% 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. By its holdings filed for Apr 30, 2026, 98% of the fund by weight is stocks the S&P 500 also holds, across 125 positions, with the top ten at 40.5%. It sat 11.1% below its high of Jun 22, 2026 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, MBB or MTUM?: In the year to Sep 12, 2026, with distributions reinvested, MBB returned −0.1% and MTUM returned +21.8%, so MTUM returned more. One year is one year; the longer windows are in the table.
Which is cheaper, MBB or MTUM?: MBB charges 0.04% a year and MTUM charges 0.15%, 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.

MBB against MTUM, 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, MBB against MTUM, data as of Sep 12, 2026. https://etfiq.com/compare/any/MBB-MTUM Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources