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

In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and MTUM +18.4%.

Which is cheaper, MBB or MTUM?

MBB is cheaper, by 0.11 percentage points a year. That is about $11 on $10,000 held for a year. Fees come from each fund's prospectus.

Data as of Oct 28, 2026.

Across categories

MBB vs MTUM: Differences, Returns & Fees

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Over the year to Oct 28, 2026, MBB returned −0.8% to MTUM's +18.4%; 0% of their weight is in the same names.

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Net assets: $35.5bn on Oct 28, 2026 for iShares MBS ETF, and $18.7bn on Oct 27, 2026 for iShares MSCI USA Momentum Factor ETF.

MBB on its own →MTUM on its own →

At a glance

−0.8%

MBB total return, 1 year

+18.4%

MTUM total return, 1 year

0.04%

MBB expense ratio

0.15%

MTUM expense ratio

Pair scorecard

MBB costs 0.11 points a year less; their one-year returns differ by 19.2 points; MBB is 1.9 times larger.

MBB vs MTUM: Differences, Returns & Fees
Measure	MBB	MTUM
Return
Measure	MBB	MTUM
Total return, 1 year	−0.8%	+18.4%
Drawdown
Measure	MBB	MTUM
Below its high		11.9%, high on Jun 22, 2026
Benchmark
Measure	MBB	MTUM
What it tracks	Bloomberg U.S. MBS Index	MSCI USA Momentum SR Variant Index
Cost and size
Measure	MBB	MTUM
Expense ratio	0.04%	0.15%
Net assets, as of Oct 26, 2026	$35.6bn	$18.4bn
Holdings
Measure	MBB	MTUM
Holdings in common	0%
In the S&P 500, by weight		93%
Top ten holdings, share of the fund		35.5%

Holdings in common uses holdings dated Oct 27, 2026. Method

What they share

By the books each fund has filed, MBB and MTUM hold 0% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.

50%

0 half 100%

half

0% in common

Positions both hold · largest shared weight first MBB MTUM

Only in one fund ↓

Only in MBB

BLACKROCK CASH CL INST SL AGENCY 5.45%

FHLMC 30YR UMBS SUPER 1.05%

UMBS 30YR TBA(REG A) 0.60%

GNMA2 30YR 0.59%

GNMA2 30YR 0.54%

FNMA 30YR UMBS 0.53%

GNMA2 30YR 0.53%

GNMA2 30YR 0.52%

Only in MTUM

ADVANCED MICRO DEVICES 6.06%

MICRON TECHNOLOGY 5.00%

INTEL CORPORATION 3.92%

CISCO SYSTEMS INC 3.64%

JOHNSON & JOHNSON 3.45%

EXXONMOBIL HOLDINGS CORP 2.96%

PALO ALTO NETWORKS 2.88%

ALPHABET CLASS A 2.62%

Check overlap with more funds →

Side by side

MBB iShares MBS ETF MTUM iShares MSCI USA Momentum Factor ETF

Where it sits Bond ETF Stock ETF

Issuer iShares iShares

What it is Tracks an index of mortgage-backed securities Tracks the MSCI USA Momentum Factor

Total return, 1 year −0.8% +18.4%

Its benchmark over the same days −1.1% (SPMB) +13.6% (MLRG)

Gap to its benchmark +0.3 pts vs SPMB +4.8 pts vs MLRG

Expense ratio 0.04% 0.15%

Holdings 10813 126

Net assets, MBB as of Oct 28, 2026 and MTUM as of Oct 27, 2026 $35.5bn $18.7bn

MBB and MTUM on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

Alert

About each fund

MBB

MBB tracks an index of mortgage-backed securities. Over the year to Oct 28, 2026 it returned −0.8% with distributions reinvested, against −1.1% for its benchmark, the Bloomberg U.S. MBS Index. The prospectus expense ratio is 0.04% a year.

MTUM

MTUM tracks the MSCI USA Momentum Factor. Over the year to Oct 28, 2026 it returned +18.4% with distributions reinvested, against +13.6% for its benchmark, the MSCI USA Index. The prospectus expense ratio is 0.15% a year. By its holdings published by its issuer for Oct 27, 2026, 93% of the fund by weight is stocks the S&P 500 also holds, across 126 positions, with the top ten at 35.5%. It sat 11.9% below its high of Jun 22, 2026 on Oct 28, 2026.

Questions people ask

Which returned more over the last year, MBB or MTUM?: In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and MTUM +18.4%.
Which is cheaper, MBB or MTUM?: MBB is cheaper, by 0.11 percentage points a year. That is about $11 on $10,000 held for a year. Fees come from each fund's prospectus.

Other comparisons

AVUS vs MBB CGGR vs MBB MBB vs SPHQ DFUS vs MBB MTUM vs TLT MTUM vs PULS MTUM vs USFR MTUM vs SCHP

Where to next

MBB on its own →MTUM on its own →Hold both: look the portfolio through →Rankings →MBB dividend history →MBB holdings →MTUM dividend history →MTUM holdings →Standards and sources →

Sources and dates

MBB and MTUM filings on SEC EDGAR ↗

MBB prospectus with the expense ratio (SEC) ↗

iShares page for MBB ↗

MTUM prospectus with the expense ratio (SEC) ↗

iShares page for MTUM ↗

Links are sources, not endorsements. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

Cite this pageCitation, APA and Markdown

ETFIQ, MBB against MTUM, data as of Oct 28, 2026. https://etfiq.com/compare/any/mbb-vs-mtum

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Free to use with attribution for data ETFIQ computes; issuer data stays under its owner's terms.