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

In the year to Sep 12, 2026, with distributions reinvested, BSV returned +1.1% and MBB returned −0.1%, so BSV returned more. One year is one year; the longer windows are in the table.

Which is cheaper, BSV or MBB?

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

Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

BSV vs MBB: how they differ

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

Vanguard Short-Term Bond Index Fund and iShares MBS ETF.

What they hold in common

By the books each fund has filed, BSV 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 BSV	Only in MBB
United States Treasury Note/Bond 1.13%	Freddie Mac 1.07%
United States Treasury Note/Bond 0.90%	Government National Mortgage Association 0.97%
United States Treasury Note/Bond 0.89%	UMBS, TBA 0.85%
United States Treasury Note/Bond 0.82%	Government National Mortgage Association 0.69%
United States Treasury Note/Bond 0.81%	UMBS, TBA 0.66%
United States Treasury Note/Bond 0.81%	Government National Mortgage Association 0.56%
United States Treasury Note/Bond 0.80%	Government National Mortgage Association 0.55%
United States Treasury Note/Bond 0.78%	Government National Mortgage Association 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 May 31, 2026.

BSV and MBB on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	BSV Vanguard Short-Term Bond Index Fund	MBB iShares MBS ETF
Where it sits	Core index fund	Core index fund
Issuer	Vanguard	iShares
What it is	Short-Term Bond	Mbs
Total return, 1 year	+1.1%	−0.1%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−16.4 pts	−17.6 pts
Expense ratio	0.03%	0.04%
Holdings	3185	11144

BSV in plain words

BSV is a bond fund tracking the Short-Term Bond. Over the year to Sep 11, 2026 it returned +1.1% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.03% a year.

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, BSV or MBB?: In the year to Sep 12, 2026, with distributions reinvested, BSV returned +1.1% and MBB returned −0.1%, so BSV returned more. One year is one year; the longer windows are in the table.
Which is cheaper, BSV or MBB?: BSV charges 0.03% a year and MBB charges 0.04%, so BSV is cheaper. Fees come from each fund's prospectus.

Other comparisons

Where to next

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.

BSV against MBB, ETFIQ, data as of Sep 12, 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, BSV against MBB, data as of Sep 12, 2026. https://etfiq.com/compare/any/BSV-MBB Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources