Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
MBB vs VTIP: how they differ
MBB and VTIP hold 0% of their weight in the same names, and VTIP returned more over the year.
iShares MBS ETF and Vanguard Short-Term Inflation-Protected Securities Index Fund.
What they hold in common
By the books each fund has filed, MBB and VTIP hold 0% of their money in the same securities at the same weight.
| Only in MBB | Only in VTIP |
|---|---|
| BLACKROCK CASH CL INST SL AGENCY 7.26% | United States Treasury Inflation Indexed 5.44% |
| GNMA2 SF 30YR 0.09% | United States Treasury Inflation Indexed 5.38% |
| GNMA II 30YR SF - JUMBO-CONFORMING 0.08% | United States Treasury Inflation Indexed 5.36% |
| GNMA2 SINGLE FAMILY 30YR 0.04% | United States Treasury Inflation Indexed 5.19% |
| GNMA II 30YR 0.03% | United States Treasury Inflation Indexed 5.02% |
| GNMA2 30YR TBA(REG C) 0.03% | United States Treasury Inflation Indexed 4.88% |
| UMBS 15YR TBA(REG B) 0.03% | United States Treasury Inflation Indexed 4.87% |
| FNMA 30YR UMBS MEGA REMIC SUPER 0.02% | United States Treasury Inflation Indexed 4.79% |
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 Jun 30, 2026 and Sep 10, 2026.
| MBB iShares MBS ETF | VTIP Vanguard Short-Term Inflation-Protected Securities Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Mbs | Short-Term Inflation-Protected Securities |
| Total return, 1 year | −0.1% | +1.7% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −17.6 pts | −15.8 pts |
| Expense ratio | 0.04% | 0.03% |
| Holdings | 2599 | 25 |
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.
VTIP in plain words
VTIP is a bond fund tracking the Short-Term Inflation-Protected Securities. 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 0.03% a year.
Questions people ask
- Which returned more over the last year, MBB or VTIP?
- In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and VTIP returned +1.7%, so VTIP returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, MBB or VTIP?
- MBB charges 0.04% a year and VTIP charges 0.03%, so VTIP is cheaper. Fees come from each fund's prospectus.
Other comparisons
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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.
Cite this page. ETFIQ, MBB against VTIP, data as of Sep 13, 2026. https://etfiq.com/compare/any/mbb-vs-vtip Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources