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

In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and VXF returned +14.1%, so VXF returned more. One year is one year; the longer windows are in the table.

Which is cheaper, MBB or VXF?

MBB charges 0.04% a year and VXF charges 0.05%, so MBB 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

MBB vs VXF: how they differ

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

iShares MBS ETF and Vanguard Extended Market Index Fund.

What they hold in common

By the books each fund has filed, MBB and VXF 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 MBB	Only in VXF
BLACKROCK CASH CL INST SL AGENCY 7.26%	Space Exploration Technologies Corp 1.19%
GNMA2 SF 30YR 0.09%	Snowflake Inc 1.03%
GNMA II 30YR SF - JUMBO-CONFORMING 0.08%	Bloom Energy Corp 0.93%
GNMA2 SINGLE FAMILY 30YR 0.04%	Cloudflare Inc 0.92%
GNMA II 30YR 0.03%	Astera Labs Inc 0.76%
GNMA2 30YR TBA(REG C) 0.03%	Rocket Lab Corp 0.61%
UMBS 15YR TBA(REG B) 0.03%	Cheniere Energy Inc 0.59%
FNMA 30YR UMBS MEGA REMIC SUPER 0.02%	Ferguson Enterprises Inc 0.54%

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 Jun 30, 2026 and Sep 10, 2026.

MBB and VXF on the fields both publish, as of Sep 13, 2026. Source: ETFIQ.
	MBB iShares MBS ETF	VXF Vanguard Extended Market Index Fund
Where it sits	Core index fund	Core index fund
Issuer	iShares	Vanguard
What it is	Mbs	Extended Market
Total return, 1 year	−0.1%	+14.1%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−17.6 pts	−3.4 pts
Expense ratio	0.04%	0.05%
Holdings	2599	3365

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.

VXF in plain words

VXF is an index equity fund tracking the Extended Market. Over the year to Sep 11, 2026 it returned +14.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.05% a year. By its holdings filed for Jun 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 3365 positions, with the top ten at 7.6%. It sat 5.1% below its high of Aug 14, 2026 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, MBB or VXF?: In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and VXF returned +14.1%, so VXF returned more. One year is one year; the longer windows are in the table.
Which is cheaper, MBB or VXF?: MBB charges 0.04% a year and VXF charges 0.05%, so MBB 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.

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

A comparison is not a recommendation. Standards and sources