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Data as of Oct 28, 2026.

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MBB vs VGIT: Differences, Returns & Fees

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MBB's duration was 5.7 years on Aug 31, 2026 and VGIT's 4.7 on May 31, 2026; VGIT charges 0.03% to MBB's 0.04%.

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Net assets: $35.5bn on Oct 28, 2026 for iShares MBS ETF, and $39.7bn on Sep 30, 2026 for Vanguard Intermediate-Term Treasury ETF.

MBB on its own →VGIT on its own →
At a glance
−0.8%
MBB total return, 1 year
−1.5%
VGIT total return, 1 year
0.04%
MBB expense ratio
0.03%
VGIT expense ratio

Pair scorecard

VGIT costs 0.01 points a year less; their one-year returns differ by 0.7 points; VGIT is 1.1 times larger.

MBB vs VGIT: Differences, Returns & Fees
MeasureMBBVGIT
Return
Total return, 1 year−0.8%−1.5%
Drawdown
Below its high3.5%, high on Aug 4, 2020
Benchmark
What it tracksBloomberg U.S. MBS IndexBloomberg U.S. Treasury 3-10 Year Index
Cost and size
Expense ratio0.04%0.03%
Net assets, as of Sep 30, 2026$36.2bn$39.7bn
Holdings
Holdings in common0%

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

What they share

0%

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

0 half 100%

half

0% in common

Positions both hold · largest shared weight first MBB VGIT
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 VGIT
US TREASURY N/B, due Feb 15, 2035 1.94%
US TREASURY N/B, due May 15, 2034 1.92%
US TREASURY N/B, due Nov 15, 2034 1.90%
US TREASURY N/B, due Aug 15, 2035 1.89%
US TREASURY N/B, due May 15, 2035 1.89%
US TREASURY N/B, due Aug 15, 2034 1.87%
US TREASURY N/B, due Feb 15, 2034 1.87%
US TREASURY N/B, due Nov 15, 2033 1.84%
Check overlap with more funds →

Side by side

MBB iShares MBS ETF VGIT Vanguard Intermediate-Term Treasury ETF
Where it sits Bond ETF Bond ETF
Issuer iShares Vanguard
What it is Tracks an index of mortgage-backed securities Tracks an index of Intermediate-Term Treasury
Total return, 1 year −0.8% −1.5%
Its benchmark over the same days −1.1% (SPMB) −1.5% (SCHR)
Gap to its benchmark +0.3 pts vs SPMB 0.0 pts vs SCHR
Expense ratio 0.04% 0.03%
Holdings 10813 103
Net assets, MBB as of Oct 28, 2026 and VGIT as of Sep 30, 2026 $35.5bn $39.7bn

MBB and VGIT 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.

VGIT

VGIT tracks an index of Intermediate-Term Treasury. Over the year to Oct 28, 2026 it returned −1.5% with distributions reinvested, against −1.5% for its benchmark, the Bloomberg U.S. Treasury 3-10 Year Index. The prospectus expense ratio is 0.03% a year. It sat 3.5% below its high of Aug 4, 2020 on Oct 28, 2026.

Questions people ask

Which returned more over the last year, MBB or VGIT?
In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and VGIT −1.5%.
Which is cheaper, MBB or VGIT?
VGIT is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
GOVT vs MBBIEF vs MBBMBB vs VCSHMBB vs VGSHBINC vs VGITBOXX vs VGITEMB vs VGITPFF vs VGIT
Where to next
MBB on its own →VGIT on its own →Hold both: look the portfolio through →Rankings →MBB dividend history →MBB holdings →VGIT dividend history →VGIT holdings →Standards and sources →
Sources and dates
MBB filings on SEC EDGAR ↗
MBB prospectus with the expense ratio (SEC) ↗
iShares page for MBB ↗
VGIT filings on SEC EDGAR ↗
VGIT prospectus with the expense ratio (SEC) ↗
Vanguard page for VGIT ↗

Links are sources, not endorsements. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

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ETFIQ, MBB against VGIT, data as of Oct 28, 2026. https://etfiq.com/compare/any/mbb-vs-vgit

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Free to use with attribution for data ETFIQ computes; issuer data stays under its owner's terms.