Data as of Oct 28, 2026.

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MBB vs SHV: Differences, Returns & Fees

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On Aug 31, 2026 MBB's duration was 5.7 years and SHV's 0.3; MBB charges 0.04% to SHV's 0.15%.

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Net assets: $35.5bn on Oct 28, 2026 for iShares MBS ETF, and $21.7bn on Oct 27, 2026 for iShares 0-1 Year Treasury Bond ETF.

At a glance
−0.8%
MBB total return, 1 year
+3.6%
SHV total return, 1 year
0.04%
MBB expense ratio
0.15%
SHV expense ratio

Pair scorecard

MBB costs 0.11 points a year less; their one-year returns differ by 4.4 points; MBB is 1.6 times larger.

MBB vs SHV: Differences, Returns & Fees
MeasureMBBSHV
Return
Total return, 1 year−0.8%+3.6%
Benchmark
What it tracksBloomberg U.S. MBS IndexICE Short US Treasury Securities Index
Cost and size
Expense ratio0.04%0.15%
Net assets, as of Oct 26, 2026$35.6bn$22.2bn
Holdings
Holdings in common0%

Holdings in common uses holdings dated Aug 31, 2026. Method

What they share

0%

By the books each fund has filed, MBB and SHV hold 0% of their money in the same securities at the same weight. Holdings dated Aug 31, 2026.

0 half 100%

half

0% in common

Positions both hold · largest shared weight first MBB SHV
Only in one fund ↓
Only in MBB
Ginnie Mae, due Sep 1, 2056 1.05%
Freddie Mac Pool, due May 1, 2051 0.98%
Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.85%
Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.70%
Ginnie Mae, due Sep 1, 2056 0.53%
Ginnie Mae II Pool, due Nov 20, 2054 0.51%
Ginnie Mae II Pool, due Oct 20, 2051 0.51%
Ginnie Mae II Pool, due Dec 20, 2051 0.50%
Only in SHV
U.S. Treasury Bills, due Jan 14, 2027 4.95%
U.S. Treasury Bills, due Oct 29, 2026 4.53%
U.S. Treasury Bills, due Oct 13, 2026 3.86%
U.S. Treasury Bills, due Dec 15, 2026 3.60%
U.S. Treasury Bills, due Oct 27, 2026 3.56%
U.S. Treasury Bills, due Dec 22, 2026 3.55%
U.S. Treasury Bills, due Oct 1, 2026 3.37%
U.S. Treasury Bills, due Nov 12, 2026 3.33%
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Side by side

MBB iShares MBS ETF SHV iShares 0-1 Year Treasury Bond ETF
Where it sits Bond ETF Bond ETF
What it is Tracks an index of mortgage-backed securities Tracks an index of 0-1 Year Treasury Bond
Total return, 1 year −0.8% +3.6%
Its benchmark over the same days −1.1% (SPMB) not measured
Gap to its benchmark +0.3 pts vs SPMB not measured
Expense ratio 0.04% 0.15%
Holdings 10813 66
Net assets, MBB as of Oct 28, 2026 and SHV as of Oct 27, 2026 $35.5bn $21.7bn

MBB and SHV on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

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About each fund
MBB

MBB tracks an index of mortgage-backed securities. Over the year to Oct 28, 2026 it returned −0.8% with distributions reinvested, against −1.1% for its benchmark, the Bloomberg U.S. MBS Index. The prospectus expense ratio is 0.04% a year.

SHV

SHV tracks an index of 0-1 Year Treasury Bond. Over the year to Oct 28, 2026 it returned +3.6% with distributions reinvested. The prospectus expense ratio is 0.15% a year.

Questions people ask

Which returned more over the last year, MBB or SHV?
In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and SHV +3.6%.
Which is cheaper, MBB or SHV?
MBB is cheaper, by 0.11 percentage points a year. That is about $11 on $10,000 held for a year. Fees come from each fund's prospectus.
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ETFIQ, MBB against SHV, data as of Oct 28, 2026. https://etfiq.com/compare/any/mbb-vs-shv

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