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

In the year to Sep 12, 2026, with distributions reinvested, BIL returned +3.7% and MBB returned −0.1%, so BIL returned more. One year is one year; the longer windows are in the table.

Which is cheaper, BIL or MBB?

BIL charges 0.14% a year and MBB charges 0.04%, 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

BIL vs MBB: how they differ

BIL is a short-term Treasury fund and MBB a bond index fund, and over the year BIL returned more, +3.7% against −0.1%.

SPDR Bloomberg 1-3 Month T-Bill ETF and iShares MBS ETF.

BIL and MBB on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	BIL SPDR Bloomberg 1-3 Month T-Bill ETF	MBB iShares MBS ETF
Where it sits	Core index fund	Core index fund
Issuer	State Street	iShares
What it is	1-3 month T-bills	Mbs
Total return, 1 year	+3.7%	−0.1%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−13.8 pts	−17.6 pts
Expense ratio	0.14%	0.04%
Holdings	not filed	11144

BIL in plain words

BIL is a cash and treasury bills tracking the 1-3 month T-bills. Over the year to Sep 11, 2026 it returned +3.7% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.14% 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, BIL or MBB?: In the year to Sep 12, 2026, with distributions reinvested, BIL returned +3.7% and MBB returned −0.1%, so BIL returned more. One year is one year; the longer windows are in the table.
Which is cheaper, BIL or MBB?: BIL charges 0.14% a year and MBB charges 0.04%, 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.

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

A comparison is not a recommendation. Standards and sources