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

In the year to Oct 28, 2026, with distributions reinvested, AGG returned −1.4% and MBB −0.8%.

Which is cheaper, AGG or MBB?

AGG is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.

Data as of Oct 28, 2026.

Across categories

AGG vs MBB: Differences, Returns & Fees

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On Aug 31, 2026 AGG's duration was 5.8 years and MBB's 5.7; AGG charges 0.03% to MBB's 0.04%.

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Net assets: $139.4bn on Oct 27, 2026 for iShares Core U.S. Aggregate Bond ETF, and $35.5bn on Oct 28, 2026 for iShares MBS ETF.

AGG on its own →MBB on its own →

At a glance

−1.4%

AGG total return, 1 year

−0.8%

MBB total return, 1 year

0.03%

AGG expense ratio

0.04%

MBB expense ratio

Pair scorecard

AGG costs 0.01 points a year less; their one-year returns differ by 0.6 points; AGG is 3.9 times larger.

AGG vs MBB: Differences, Returns & Fees
Measure	AGG	MBB
Return
Measure	AGG	MBB
Total return, 1 year	−1.4%	−0.8%
Drawdown
Measure	AGG	MBB
Below its high	3.4%, high on Aug 4, 2020
Benchmark
Measure	AGG	MBB
What it tracks	Bloomberg U.S. Aggregate Bond Index	Bloomberg U.S. MBS Index
Cost and size
Measure	AGG	MBB
Expense ratio	0.03%	0.04%
Net assets, as of Oct 26, 2026	$139.3bn	$35.6bn
Holdings
Measure	AGG	MBB
Holdings in common	17%

Holdings in common uses holdings dated Aug 31, 2026. Method

Risk and return

Mar 23, 2007 to Oct 23, 2026 · 1,022 weekly returns

AGG MBB

Return

Total return edge AGG +73.9% +63.4%

Annualized edge AGG +2.9% +2.5%

Price return edge AGG −4.4% −9.6%

Risk

Volatility edge MBB 5.4% 4.2%

Max drawdown edge MBB (slight) −18.2% −17.4%

Downside capture 97.5% 78.4%

Beta 0.94 0.76

Risk-adjusted

Sharpe edge AGG (slight) 0.26 0.24

Sortino edge Tie 0.35 0.35

Treynor 0.004 0.009

Calmar edge AGG (slight) 0.16 0.15

Against the benchmark

Alpha +0.1% a year +0.1% a year

Alpha t-stat 0.23 0.26

Information ratio 0.04 −0.03

Tracking error 1.1% 2.3%

Each against its own benchmark: AGG against SCHZ, Jul 22, 2011 to Oct 23, 2026; MBB against SPMB, Feb 6, 2009 to Oct 23, 2026.

Reading

AGG returned more: +73.9% to +63.4%. MBB swung less: 4.2% to 5.4%. MBB fell slightly less at its worst: −17.4% to −18.2%.

Full scorecard

19 measures, with how each is measured Open ↓

Risk and return: AGG vs MBB: Differences, Returns & Fees
Measure	AGG	MBB	Edge	How it is measured
Return
Total return	+73.9%	+63.4%	AGG	Price change plus distributions, reinvested.
Annualized	+2.9%	+2.5%	AGG	Total return as a yearly rate.
Price return	−4.4%	−9.6%	AGG	Price change alone, distributions left out.
Risk
Volatility	5.4%	4.2%	MBB	Spread of weekly returns, annualized. Lower is steadier.
Downside deviation	4.0%	2.9%	MBB	Like volatility, counting only weeks below the Treasury bill rate.
Max drawdown	−18.2%	−17.4%	MBB (slight)	Deepest fall from a high to the low after it.
Upside capture	97.5%	77.8%		Share of its benchmark's rise caught in the weeks it rose.
Downside capture	97.5%	78.4%		Share of its benchmark's fall taken in the weeks it fell. Lower is better.
Beta	0.94	0.76	Not an edge	How far it moves for each 1% its benchmark moves.
R squared	0.95	0.76	Not an edge	Share of its weekly moves its benchmark explains.
Risk-adjusted
Sharpe	0.26	0.24	AGG (slight)	Return above Treasury bills per unit of volatility.
Sortino	0.35	0.35	Tie	Return above Treasury bills per unit of downside deviation.
Treynor	0.004	0.009		Return above Treasury bills per unit of beta.
Calmar	0.16	0.15	AGG (slight)	Annualized return divided by the max drawdown.
Against the benchmark
Benchmark	SCHZ	SPMB		The ETF each fund is measured against.
Alpha	+0.1% a year	+0.1% a year	Not significant	Yearly return beyond what its beta to the benchmark predicts.
Alpha t-stat	0.23	0.26	Not an edge	How sure the alpha is. Below 2, it could be chance.
Alpha range	−0.4% to +0.6%	−0.8% to +1.1%	Includes zero	The 95% range for the yearly alpha.
Information ratio	0.04	−0.03		Return against its benchmark per unit of tracking error.
Tracking error	1.1%	2.3%	Not an edge	How far weekly returns stray from the benchmark, annualized.

Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 1,022 weekly returns. Cash rate: the 13-week Treasury bill.

What they share

17%

By the books each fund has filed, AGG and MBB hold 17% of their money in the same securities at the same weight. Holdings dated Aug 31, 2026.

50%

0 half 100%

half

17% in common

Positions both hold · largest shared weight first AGG MBB

Fannie Mae Pool, due Oct 1, 2051 0.21% 0.29%

Ginnie Mae, due Sep 1, 2056 0.20% 1.05%

Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.17% 0.70%

Ginnie Mae, due Sep 1, 2056 0.16% 0.53%

Uniform Mortgage-Backed Security, TBA, due Sep 1, 2041 0.15% 0.39%

Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.15% 0.17%

Ginnie Mae, due Sep 1, 2056 0.15% 0.46%

Freddie Mac Pool, due Mar 1, 2052 0.13% 0.17%

Ginnie Mae II Pool, due May 20, 2051 0.13% 0.33%

Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.13% 0.85%

Fannie Mae Pool, due Nov 1, 2051 0.13% 0.41%

Ginnie Mae II Pool, due Dec 20, 2054 0.13% 0.22%

Only in one fund ↓

Only in AGG

U.S. Treasury Notes, due Feb 15, 2035 0.41%

U.S. Treasury Notes, due Nov 15, 2034 0.40%

U.S. Treasury Notes, due Feb 28, 2030 0.40%

U.S. Treasury Notes, due May 15, 2034 0.40%

U.S. Treasury Notes, due Aug 15, 2034 0.39%

U.S. Treasury Notes, due Feb 15, 2036 0.39%

U.S. Treasury Notes, due May 15, 2035 0.39%

U.S. Treasury Notes, due Nov 15, 2033 0.38%

Only in MBB

Fannie Mae Pool, due Apr 1, 2052 0.31%

Fannie Mae Pool, due Feb 1, 2051 0.26%

Ginnie Mae II Pool, due Aug 20, 2056 0.25%

Freddie Mac Pool, due May 1, 2053 0.22%

Fannie Mae Pool, due May 1, 2052 0.21%

Fannie Mae Pool, due Feb 1, 2051 0.19%

Fannie Mae Pool, due Nov 1, 2053 0.19%

Fannie Mae Pool, due Sep 1, 2048 0.18%

Check overlap with more funds →

Side by side

AGG iShares Core U.S. Aggregate Bond ETF MBB iShares MBS ETF

Where it sits Bond ETF Bond ETF

Issuer iShares iShares

What it is Tracks an index of US aggregate bonds Tracks an index of mortgage-backed securities

Total return, 1 year −1.4% −0.8%

Its benchmark over the same days −1.3% (SCHZ) −1.1% (SPMB)

Gap to its benchmark −0.1 pts vs SCHZ +0.3 pts vs SPMB

Expense ratio 0.03% 0.04%

Holdings 13469 10813

Net assets, AGG as of Oct 27, 2026 and MBB as of Oct 28, 2026 $139.4bn $35.5bn

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

Client brief · page 1 of 2 Report BR-6B274718F4

AGG and MBB do different jobs. What does each one do in a portfolio?

What each follows. AGG follows Bloomberg U.S. Aggregate Bond Index and MBB follows Bloomberg U.S. MBS Index.
Holdings in common. 17% of the weight is in the same securities (holdings dated Aug 31, 2026).
Size. AGG has $139.3bn in net assets and MBB $35.6bn (net assets, as of Oct 26, 2026); AGG is 3.9 times larger.

Data as of Oct 28, 2026.

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About each fund

AGG

AGG tracks an index of US aggregate bonds. Over the year to Oct 28, 2026 it returned −1.4% with distributions reinvested, against −1.3% for its benchmark, the Bloomberg U.S. Aggregate Bond Index. The prospectus expense ratio is 0.03% a year. It sat 3.4% below its high of Aug 4, 2020 on Oct 28, 2026.

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, AGG or MBB?: In the year to Oct 28, 2026, with distributions reinvested, AGG returned −1.4% and MBB −0.8%.
Which is cheaper, AGG or MBB?: AGG is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.

Other comparisons

AGG vs BINC AGG vs SCHP AGG vs BNDX AGG vs TIP BND vs MBB MBB vs SGOV BNDX vs MBB MBB vs VCIT

Where to next

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

Sources and dates

AGG and MBB filings on SEC EDGAR ↗

AGG and MBB prospectus with the expense ratio (SEC) ↗

iShares page for AGG ↗

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

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