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

In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and XLB +18.5%.

Which is cheaper, MBB or XLB?

MBB is cheaper, by 0.04 percentage points a year. That is about $4 on $10,000 held for a year. Fees come from each fund's prospectus.

Data as of Oct 28, 2026.

Across categories

MBB vs XLB: Differences, Returns & Fees

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Over the year to Oct 28, 2026, MBB returned −0.8% to XLB's +18.5%; 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 $8.1bn on Oct 27, 2026 for State Street Materials Select Sector SPDR ETF.

MBB on its own →XLB on its own →

At a glance

−0.8%

MBB total return, 1 year

+18.5%

XLB total return, 1 year

0.04%

MBB expense ratio

0.08%

XLB expense ratio

Pair scorecard

MBB costs 0.04 points a year less; their one-year returns differ by 19.3 points; MBB is 4.5 times larger.

MBB vs XLB: Differences, Returns & Fees
Measure	MBB	XLB
Return
Measure	MBB	XLB
Total return, 1 year	−0.8%	+18.5%
Benchmark
Measure	MBB	XLB
What it tracks	Bloomberg U.S. MBS Index	Materials Select Sector Index
Cost and size
Measure	MBB	XLB
Expense ratio	0.04%	0.08%
Net assets, as of Oct 26, 2026	$35.6bn	$8.0bn
Holdings
Measure	MBB	XLB
Holdings in common	0%
In the S&P 500, by weight		100%
Top ten holdings, share of the fund		58.5%

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

What they share

By the books each fund has filed, MBB and XLB 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 XLB

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 XLB

LINDE PLC 12.96%

NEWMONT CORP 6.56%

FREEPORT MCMORAN INC 5.23%

ECOLAB INC 4.98%

VULCAN MATERIALS CO 4.89%

NUCOR CORP 4.89%

AIR PRODUCTS + CHEMICALS INC 4.84%

STEEL DYNAMICS INC 4.77%

Check overlap with more funds →

Side by side

MBB iShares MBS ETF XLB State Street Materials Select Sector SPDR ETF

Where it sits Bond ETF Stock ETF

Issuer iShares State Street

What it is Tracks an index of mortgage-backed securities Tracks an index of Materials

Total return, 1 year −0.8% +18.5%

Its benchmark over the same days −1.1% (SPMB) not measured

Gap to its benchmark +0.3 pts vs SPMB not measured

Expense ratio 0.04% 0.08%

Holdings 10813 25

Net assets, MBB as of Oct 28, 2026 and XLB as of Oct 27, 2026 $35.5bn $8.1bn

MBB and XLB 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.

XLB

XLB tracks an index of Materials. Over the year to Oct 28, 2026 it returned +18.5% with distributions reinvested. The prospectus expense ratio is 0.08% a year. By its holdings published by its issuer for Oct 27, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 25 positions, with the top ten at 58.5%.

Questions people ask

Which returned more over the last year, MBB or XLB?: In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and XLB +18.5%.
Which is cheaper, MBB or XLB?: MBB is cheaper, by 0.04 percentage points a year. That is about $4 on $10,000 held for a year. Fees come from each fund's prospectus.

Other comparisons

MBB vs XHB MBB vs VPU MBB vs VDC MBB vs VDE MINT vs XLB TIP vs XLB VBIL vs XLB PFF vs XLB

Where to next

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

Sources and dates

MBB filings on SEC EDGAR ↗

MBB prospectus with the expense ratio (SEC) ↗

iShares page for MBB ↗

XLB filings on SEC EDGAR ↗

XLB prospectus with the expense ratio (SEC) ↗

State Street website ↗

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 XLB, data as of Oct 28, 2026. https://etfiq.com/compare/any/mbb-vs-xlb

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