{"url":"https://etfiq.com/compare/any/mbb-vs-spmb","section":"compare","title":"MBB vs SPMB: Differences, Returns & Fees | ETFIQ","description":"MBB and SPMB side by side to Oct 9, 2026: one-year total return \u22121.2% against \u22121.4%, expense ratio 0.04% against 0.04%.","as_of":"Oct 9, 2026","structured_data":[{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Which returned more over the last year, MBB or SPMB?","acceptedAnswer":{"@type":"Answer","text":"In the year to Oct 9, 2026, with distributions reinvested, MBB returned \u22121.2% and SPMB \u22121.4%."}},{"@type":"Question","name":"Which is cheaper, MBB or SPMB?","acceptedAnswer":{"@type":"Answer","text":"Neither: MBB and SPMB both charge 0.04% a year. Fees come from each fund's prospectus."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Compare ETFs","item":"https://etfiq.com/compare/"},{"@type":"ListItem","position":3,"name":"MBB vs SPMB","item":"https://etfiq.com/compare/any/mbb-vs-spmb"}]},{"@type":"WebPage","name":"MBB vs SPMB: Differences, Returns & Fees","description":"MBB and SPMB side by side to Oct 9, 2026: one-year total return \u22121.2% against \u22121.4%, expense ratio 0.04% against 0.04%.","url":"https://etfiq.com/compare/any/mbb-vs-spmb","dateModified":"2026-10-09","speakable":{"@type":"SpeakableSpecification","cssSelector":[".verdict",".lede",".faq"]},"isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"}},{"@type":"Dataset","name":"ETFIQ comparison of MBB and SPMB","description":"MBB and SPMB side by side to Oct 9, 2026: one-year total return \u22121.2% against \u22121.4%, expense ratio 0.04% against 0.04%.","dateModified":"2026-10-09","creator":{"@id":"https://etfiq.com/#org"},"license":"https://etfiq.com/license/","isAccessibleForFree":true,"url":"https://etfiq.com/compare/any/mbb-vs-spmb","publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published","distribution":[{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/alternatives.json"},{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/core.json"},{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/crypto.json"},{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/funds.json"},{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/income.json"},{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/leverage.json"},{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/thematic.json"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Compare ETFs","item":"https://etfiq.com/compare/"},{"@type":"ListItem","position":3,"name":"MBB vs SPMB","item":"https://etfiq.com/compare/any/mbb-vs-spmb"}]},{"@type":"WebPage","name":"MBB vs SPMB: Differences, Returns & Fees","description":"MBB and SPMB side by side to Oct 9, 2026: one-year total return \u22121.2% against \u22121.4%, expense ratio 0.04% against 0.04%.","url":"https://etfiq.com/compare/any/mbb-vs-spmb","dateModified":"2026-10-09","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".verdict",".lede",".faq"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":5513,"truncated":true,"content":"ETFIQ / Compare ETFs / MBB vs SPMB \n \n Data as of Oct 9, 2026.\n ETFIQ etfiq.com \u00b7 independent ETF data \n MBB vs SPMB: Differences, Returns & Fees\n MBB's duration was 5.4 years on May 31, 2026 and SPMB's 5.5 on Jun 30, 2026; both charge 0.04%.\n Copy this for sharing \n Both cost 0.04% a year; their one-year returns differ by 0.2 points; MBB is 5.2 times larger.\n MBB and SPMB at a glance. As of Oct 9, 2026. Source: ETFIQ. MBB SPMB \n Expense ratio 0.04% 0.04% \n Net assets, as of Oct 8, 2026 $35.6bn $6.8bn \n Total return, 1 year \u22121.2% \u22121.4% \n What it tracks Bloomberg U.S. MBS Index Bloomberg U.S. M","source":"ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.","publisher":{"@id":"https://etfiq.com/#org","name":"ETFIQ","url":"https://etfiq.com"},"license":"https://etfiq.com/license/","license_text":"Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, MBB against SPMB, data as of Oct 9, 2026. https://etfiq.com/compare/any/mbb-vs-spmb","a":{"ticker":"MBB","name":"iShares MBS ETF","issuer":"iShares","desk":"core","as_of":"2026-10-09","verdict":"MBB tracks an index of mortgage-backed securities and returned \u22121.2% over the past year.","url":"https://etfiq.com/funds/mbb","key_facts":[{"label":"Total return, 1 year","value":"\u22121.2%","as_of":"2026-10-09","source":null},{"label":"Expense ratio","value":"0.04%","as_of":"2026-10-09","source":null},{"label":"Holdings","value":"10855","as_of":"2026-10-09","source":null},{"label":"Below its high","value":"\u22124.6%","as_of":"2026-10-09","source":null},{"label":"12-month yield: cash paid, 1 year, on its starting price","value":"4.3%","as_of":"2026-10-09","source":null},{"label":"Last payment (paid monthly), ex-date Oct 1, 2026","value":"$0.3662","as_of":"2026-10-09","source":null},{"label":"Net assets","value":"$35.6bn","as_of":"2026-10-09","source":"the issuer\u2019s own daily fund list, as of Oct 9, 2026"}]},"b":{"ticker":"SPMB","name":"State Street SPDR Portfolio Mortgage Backed Bond ETF","issuer":"State Street","desk":"core","as_of":"2026-10-09","verdict":"SPMB tracks an index and returned \u22121.4% over the past year.","url":"https://etfiq.com/funds/spmb","key_facts":[{"label":"Total return, 1 year","value":"\u22121.4%","as_of":"2026-10-09","source":null},{"label":"Expense ratio","value":"0.04%","as_of":"2026-10-09","source":null},{"label":"Holdings","value":"2756","as_of":"2026-10-09","source":null},{"label":"Below its high","value":"\u22124.7%","as_of":"2026-10-09","source":null},{"label":"12-month yield: cash paid, 1 year, on its starting price","value":"4.1%","as_of":"2026-10-09","source":null},{"label":"Last payment (paid monthly), ex-date Oct 1, 2026","value":"$0.073","as_of":"2026-10-09","source":null},{"label":"Net assets","value":"$6.8bn","as_of":"2026-10-09","source":"the issuer\u2019s own daily fund list, as of Oct 8, 2026"}]},"overlap_pct":14,"full_text_at":"https://etfiq.com/compare/any/mbb-vs-spmb"}