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

In the year to Sep 13, 2026, with distributions reinvested, IGSB returned +1.7% and MBB returned −0.1%, so IGSB returned more. One year is one year; the longer windows are in the table.

Which is cheaper, IGSB or MBB?

IGSB charges 0.04% a year and MBB charges 0.04%, so IGSB 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

IGSB vs MBB: how they differ

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

iShares 1-5 Year Investment Grade Corporate Bond ETF and iShares MBS ETF.

What they hold in common

By the books each fund has filed, IGSB 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 IGSB	Only in MBB
BLK CSH FND TREASURY SL AGENCY 0.56%	BLACKROCK CASH CL INST SL AGENCY 7.26%
EAGLE FUNDING LUXCO S. R.L. 144A 0.29%	GNMA2 SF 30YR 0.09%
SPACE EXPLORATION TECHNOLOGIES COR 144A 0.15%	GNMA II 30YR SF - JUMBO-CONFORMING 0.08%
DEUTSCHE TELEKOM INTERNATIONAL FIN 0.10%	GNMA2 SINGLE FAMILY 30YR 0.04%
BAYER US FINANCE II LLC 144A 0.09%	GNMA II 30YR 0.03%
JPMORGAN CHASE & CO MTN 0.09%	GNMA2 30YR TBA(REG C) 0.03%
GOLDMAN SACHS BANK USA (FXD-FRN) 0.08%	UMBS 15YR TBA(REG B) 0.03%
GOLDMAN SACHS GROUP INC/THE MTN 0.08%	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.

IGSB and MBB on the fields both publish, as of Sep 13, 2026. Source: ETFIQ.
	IGSB iShares 1-5 Year Investment Grade Corporate Bond ETF	MBB iShares MBS ETF
Where it sits	Core index fund	Core index fund
Issuer	iShares	iShares
What it is	1-5 Year Investment Grade Corporate Bond	Mbs
Total return, 1 year	+1.7%	−0.1%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−15.8 pts	−17.6 pts
Expense ratio	0.04%	0.04%
Holdings	4496	2599

IGSB in plain words

IGSB is a bond fund tracking the 1-5 Year Investment Grade Corporate 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 0.04% 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. 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, IGSB or MBB?: In the year to Sep 13, 2026, with distributions reinvested, IGSB returned +1.7% and MBB returned −0.1%, so IGSB returned more. One year is one year; the longer windows are in the table.
Which is cheaper, IGSB or MBB?: IGSB charges 0.04% a year and MBB charges 0.04%, so IGSB 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.

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

A comparison is not a recommendation. Standards and sources