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

In the year to Sep 13, 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 13, 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
BLACKROCK CASH CL INST SL AGENCY 7.26%	USD CASH 0.88%
GNMA2 SF 30YR 0.09%	TREASURY NOTE (2OLD) 0.80%
GNMA II 30YR SF - JUMBO-CONFORMING 0.08%	TREASURY NOTE (OLD) 0.76%
GNMA2 SINGLE FAMILY 30YR 0.04%	TREASURY NOTE (OTR) 0.58%
GNMA II 30YR 0.03%	BLK CSH FND TREASURY SL AGENCY 0.26%
GNMA2 30YR TBA(REG C) 0.03%	TREASURY NOTE 0.06%
UMBS 15YR TBA(REG B) 0.03%
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.

MBB and SHY on the fields both publish, as of Sep 13, 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	2599	93

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 13, 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.

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.

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

A comparison is not a recommendation. Standards and sources