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

In the year to Oct 28, 2026, with distributions reinvested, AOR returned +7.8% and MBB −0.8%.

Which is cheaper, AOR or MBB?

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

AOR vs MBB: Differences, Returns & Fees

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Over the year to Oct 28, 2026, AOR returned +7.8% to MBB's −0.8%; 0% of their weight is in the same names.

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Net assets on Oct 28, 2026: $3.9bn for iShares Core 60/40 Balanced Allocation ETF and $35.5bn for iShares MBS ETF.

AOR on its own →MBB on its own →

At a glance

+7.8%

AOR total return, 1 year

−0.8%

MBB total return, 1 year

0.15%

AOR expense ratio

0.04%

MBB expense ratio

Pair scorecard

MBB costs 0.11 points a year less; their one-year returns differ by 8.6 points; MBB is 9.1 times larger.

AOR vs MBB: Differences, Returns & Fees
Measure	AOR	MBB
Return
Measure	AOR	MBB
Total return, 1 year	+7.8%	−0.8%
Benchmark
Measure	AOR	MBB
What it tracks	60/40 Balanced Allocation	Bloomberg U.S. MBS Index
Cost and size
Measure	AOR	MBB
Expense ratio	0.15%	0.04%
Net assets	$3.9bn	$35.5bn
Holdings
Measure	AOR	MBB
Holdings in common	0%
In the S&P 500, by weight	0%
Top ten holdings, share of the fund	99.9%

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

What they share

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

Only in one fund ↓

Only in AOR

ISHARES CORE S&P ETF TRUST 35.70%

ISHARES CORE UNIV USD BOND ETF 32.15%

ISHARES CORE MSCI INT DEVEL ETF 17.10%

ISHARES CORE MSCI EMERGING MARKETS 6.34%

iShares Core Intl Aggregate Bnd ET 5.81%

ISHARES CORE S&P MID-CAP ETF 1.89%

ISHARES CORE S&P SMALL-CAP ETF 0.92%

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%

Check overlap with more funds →

Side by side

AOR iShares Core 60/40 Balanced Allocation ETF MBB iShares MBS ETF

Where it sits Allocation ETF Bond ETF

Issuer iShares iShares

What it is Tracks an index of 60/40 Balanced Allocation Tracks an index of mortgage-backed securities

Total return, 1 year +7.8% −0.8%

Its benchmark over the same days +13.4% (ACWI) −1.1% (SPMB)

Gap to its benchmark −5.6 pts vs ACWI +0.3 pts vs SPMB

Expense ratio 0.15% 0.04%

Holdings 7 10813

Net assets $3.9bn $35.5bn

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

Alert

About each fund

AOR

AOR tracks an index of 60/40 Balanced Allocation. Over the year to Oct 28, 2026 it returned +7.8% with distributions reinvested, against +13.4% for its benchmark, the MSCI All Country World Index. The prospectus expense ratio is 0.15% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 7 positions, with the top ten at 99.9%.

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.

Questions people ask

Which returned more over the last year, AOR or MBB?: In the year to Oct 28, 2026, with distributions reinvested, AOR returned +7.8% and MBB −0.8%.
Which is cheaper, AOR or MBB?: 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

AOR vs BNDX AOR vs EMB AOR vs VBIL AOR vs PFF CGBL vs MBB IYR vs MBB HYMB vs MBB FXI vs MBB

Where to next

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

Sources and dates

AOR and MBB filings on SEC EDGAR ↗

AOR prospectus with the expense ratio (SEC) ↗

iShares page for AOR ↗

MBB prospectus with the expense ratio (SEC) ↗

iShares page for MBB ↗

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

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