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

In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and TLT returned −6.4%, so MBB returned more. One year is one year; the longer windows are in the table.

Which is cheaper, MBB or TLT?

MBB charges 0.04% a year and TLT 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 TLT: how they differ

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

iShares MBS ETF and iShares 20+ Year Treasury Bond ETF.

What they hold in common

By the books each fund has filed, MBB and TLT 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 TLT
BLACKROCK CASH CL INST SL AGENCY 7.26%	TREASURY BOND (2OLD) 4.16%
GNMA2 SF 30YR 0.09%	TREASURY BOND (OLD) 4.05%
GNMA II 30YR SF - JUMBO-CONFORMING 0.08%	TREASURY BOND (OTR) 1.03%
GNMA2 SINGLE FAMILY 30YR 0.04%	TREASURY BOND 0.02%
GNMA II 30YR 0.03%
GNMA2 30YR TBA(REG C) 0.03%
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 TLT on the fields both publish, as of Sep 13, 2026. Source: ETFIQ.
	MBB iShares MBS ETF	TLT iShares 20+ Year Treasury Bond ETF
Where it sits	Core index fund	Core index fund
Issuer	iShares	iShares
What it is	Mbs	20+ year Treasuries
Total return, 1 year	−0.1%	−6.4%
S&P 500 over the same days	+17.5%	+17.5%
Gap to the S&P 500	−17.6 pts	−23.9 pts
Expense ratio	0.04%	0.15%
Holdings	2599	41

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.

TLT in plain words

TLT is a bond fund tracking the 20+ year Treasuries. Over the year to Sep 11, 2026 it returned −6.4% 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. It sat 42.9% below its high of Aug 4, 2020 on Sep 11, 2026.

Questions people ask

Which returned more over the last year, MBB or TLT?: In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and TLT returned −6.4%, so MBB returned more. One year is one year; the longer windows are in the table.
Which is cheaper, MBB or TLT?: MBB charges 0.04% a year and TLT 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 TLT, 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 TLT, data as of Sep 13, 2026. https://etfiq.com/compare/any/mbb-vs-tlt Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources