Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
MBB vs XLU: how they differ
MBB and XLU hold 0% of their weight in the same names, and XLU returned more over the year.
iShares MBS ETF and State Street(R) Utilities Select Sector SPDR(R) ETF.
What they hold in common
By the books each fund has filed, MBB and XLU hold 0% of their money in the same securities at the same weight.
| Only in MBB | Only in XLU |
|---|---|
| BLACKROCK CASH CL INST SL AGENCY 7.26% | NEXTERA ENERGY INC 13.01% |
| GNMA2 SF 30YR 0.09% | SOUTHERN CO/THE 7.49% |
| GNMA II 30YR SF - JUMBO-CONFORMING 0.08% | DUKE ENERGY CORP 7.04% |
| GNMA2 SINGLE FAMILY 30YR 0.04% | CONSTELLATION ENERGY 6.92% |
| GNMA II 30YR 0.03% | AMERICAN ELECTRIC POWER 5.08% |
| GNMA2 30YR TBA(REG C) 0.03% | DOMINION ENERGY INC 4.33% |
| UMBS 15YR TBA(REG B) 0.03% | SEMPRA 4.16% |
| FNMA 30YR UMBS MEGA REMIC SUPER 0.02% | ENTERGY CORP 3.66% |
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 iShares MBS ETF | XLU State Street(R) Utilities Select Sector SPDR(R) ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | State Street |
| What it is | Mbs | Utilities |
| Total return, 1 year | −0.1% | +2.4% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −17.6 pts | −15.1 pts |
| Expense ratio | 0.04% | 0.08% |
| Holdings | 2599 | 32 |
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.
XLU in plain words
XLU is an index equity fund tracking the Utilities. Over the year to Sep 11, 2026 it returned +2.4% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.08% a year. By its holdings filed for Sep 10, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 32 positions, with the top ten at 58.8%. It sat 10.0% below its high of Feb 27, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, MBB or XLU?
- In the year to Sep 13, 2026, with distributions reinvested, MBB returned −0.1% and XLU returned +2.4%, so XLU returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, MBB or XLU?
- MBB charges 0.04% a year and XLU charges 0.08%, so MBB 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 XLU, data as of Sep 13, 2026. https://etfiq.com/compare/any/mbb-vs-xlu Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources