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

In the year to Sep 12, 2026, with distributions reinvested, MBB returned −0.1% and SHY returned +1.7%, so SHY returned more. One year is one year; the longer windows are in the table.

Which is cheaper, MBB or SHY?

MBB charges 0.04% a year and SHY charges 0.15%, so MBB 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

MBB vs SHY: how they differ

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

iShares MBS ETF and iShares 1-3 Year Treasury Bond ETF.

What they hold in common

By the books each fund has filed, MBB and SHY 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 SHY
Freddie Mac 1.07%	United States of America 1.97%
Government National Mortgage Association 0.97%	United States of America 1.86%
UMBS, TBA 0.85%	United States of America 1.72%
Government National Mortgage Association 0.69%	United States of America 1.62%
UMBS, TBA 0.66%	United States of America 1.61%
Government National Mortgage Association 0.56%	United States of America 1.53%
Government National Mortgage Association 0.55%	United States of America 1.49%
Government National Mortgage Association 0.54%	United States of America 1.47%

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 May 31, 2026.

MBB and SHY on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	MBB iShares MBS ETF	SHY iShares 1-3 Year Treasury Bond ETF
Where it sits	Core index fund	Core index fund
Issuer	iShares	iShares
What it is	Mbs	1-3 Year Treasury Bond
Total return, 1 year	−0.1%	+1.7%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−17.6 pts	−15.8 pts
Expense ratio	0.04%	0.15%
Holdings	11144	89

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.

SHY in plain words

SHY is a bond fund tracking the 1-3 Year Treasury Bond. Over the year to Sep 11, 2026 it returned +1.7% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.15% a year.

Questions people ask

Which returned more over the last year, MBB or SHY?: In the year to Sep 12, 2026, with distributions reinvested, MBB returned −0.1% and SHY returned +1.7%, so SHY returned more. One year is one year; the longer windows are in the table.
Which is cheaper, MBB or SHY?: MBB charges 0.04% a year and SHY charges 0.15%, 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 SHY, 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, MBB against SHY, data as of Sep 12, 2026. https://etfiq.com/compare/any/MBB-SHY Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources