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

In the year to Sep 13, 2026, with distributions reinvested, IVV returned +17.6% and MBB returned −0.1%, so IVV returned more. One year is one year; the longer windows are in the table.

Which is cheaper, IVV or MBB?

IVV charges 0.03% a year and MBB charges 0.04%, so IVV is cheaper. Fees come from each fund's prospectus.

Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

IVV vs MBB: how they differ

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

iShares Core S&P 500 ETF and iShares MBS ETF.

What they hold in common

By the books each fund has filed, IVV and MBB 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 IVV	Only in MBB
NVIDIA 8.06%	BLACKROCK CASH CL INST SL AGENCY 7.26%
APPLE 7.31%	GNMA2 SF 30YR 0.09%
MICROSOFT 5.58%	GNMA II 30YR SF - JUMBO-CONFORMING 0.08%
AMAZON.COM INC 3.76%	GNMA2 SINGLE FAMILY 30YR 0.04%
ALPHABET CLASS A 2.98%	GNMA II 30YR 0.03%
BROADCOM INC 2.61%	GNMA2 30YR TBA(REG C) 0.03%
ALPHABET CLASS C 2.38%	UMBS 15YR TBA(REG B) 0.03%
META PLATFORMS CLASS A 2.16%	FNMA 30YR UMBS MEGA REMIC SUPER 0.02%

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 Sep 10, 2026.

IVV and MBB on the fields both publish, as of Sep 13, 2026. Source: ETFIQ.
	IVV iShares Core S&P 500 ETF	MBB iShares MBS ETF
Where it sits	Core index fund	Core index fund
Issuer	iShares	iShares
What it is	S&P 500	Mbs
Total return, 1 year	+17.6%	−0.1%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	+0.1 pts	−17.6 pts
Expense ratio	0.03%	0.04%
Holdings	505	2599

IVV in plain words

IVV is an index equity fund tracking the S&P 500. Over the year to Sep 11, 2026 it returned +17.6% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year. By its holdings filed for Sep 10, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 505 positions, with the top ten at 38.1%.

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.

Questions people ask

Which returned more over the last year, IVV or MBB?: In the year to Sep 13, 2026, with distributions reinvested, IVV returned +17.6% and MBB returned −0.1%, so IVV returned more. One year is one year; the longer windows are in the table.
Which is cheaper, IVV or MBB?: IVV charges 0.03% a year and MBB charges 0.04%, so IVV 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.

IVV against MBB, ETFIQ, data as of Sep 13, 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, IVV against MBB, data as of Sep 13, 2026. https://etfiq.com/compare/any/ivv-vs-mbb Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources