{"url":"https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/","section":"flows","title":"Bloomberg U.S. MBS ETF fund flows: MBB and SPMB | ETFIQ","description":"Three months to Oct 8, 2026: of 2 Bloomberg U.S. MBS ETFs counted throughout, SPMB took in the most, $110m to Oct 7.","as_of":"Oct 8, 2026","structured_data":[{"@type":"Dataset","name":"MBB and SPMB: money in and out, side by side","description":"Three months to Oct 8, 2026: of 2 Bloomberg U.S. MBS ETFs counted throughout, SPMB took in the most, $110m to Oct 7.","url":"https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/","dateModified":"2026-10-09","variableMeasured":["Net fund flow"],"isAccessibleForFree":true,"creditText":"ETFIQ (etfiq.com)","distribution":[{"@type":"DataDownload","encodingFormat":"text/csv","contentUrl":"https://etfiq.com/data/flows/compare/by-index/bloomberg-us-mbs.csv"},{"@type":"DataDownload","encodingFormat":"text/csv","contentUrl":"https://etfiq.com/data/flows/compare/by-index/bloomberg-us-mbs-periods.csv"}],"license":"https://etfiq.com/license/","creator":{"@id":"https://etfiq.com/#org"},"publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published"},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Fund flows","item":"https://etfiq.com/flows/"},{"@type":"ListItem","position":3,"name":"Compare: MBB, SPMB","item":"https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/"}]},{"@type":"WebPage","name":"Bloomberg U.S. MBS ETF fund flows: MBB and SPMB","description":"Three months to Oct 8, 2026: of 2 Bloomberg U.S. MBS ETFs counted throughout, SPMB took in the most, $110m to Oct 7.","url":"https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/","dateModified":"2026-10-09","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":3847,"truncated":false,"content":"ETFIQ / Fund flows / Compare: MBB, SPMB \n \n Flows as of Oct 8, 2026 , the trading day.\n Compare flows \u00b7 the two Bloomberg U.S. MBS funds \u00b7 daily figures\n MBB and SPMB: money in and out, side by side\n Three months to Oct 8, 2026: of 2 Bloomberg U.S. MBS ETFs counted throughout, SPMB took in the most, $110m to Oct 7.\n Open these funds in the flows tool \n Net flow, each fund on one scale\n Last three months \u00b7 small multiples \u00b7 the cumulative line over each\n MBB Daily, from the issuer\u2019s count [MBB net flow each trading day, Jul 9, 2026 to Oct 8, 2026. MBB. +$572m. +$84.2m. \u2212$1.3bn. \u2212$190m. \u2212$271m. \u2212$44.9m. \u2212$179m. \u2212$717m] \n Net \u2212$2.0bn over the three months; in on 2 days, out on 6.\n SPMB Daily, from the issuer\u2019s count [SPMB net flow each trading day, Jul 9, 2026 to Oct 8, 2026. SPMB. \u2212$6.6m. +$8.8m. +$8.8m. +$32.8m. +$26.4m. +$13.2m. +$11.0m. +$33.0m. +$11.0m. +$6.6m. +$4.4m. +$13.3m. +$8.8m. +$8.8m. +$10.9m. +$10.8m. +$10.8m. +$2.2m. \u2212$21.6m. \u2212$64.2m. \u2212$19.1m. +$14.8m. \u2212$6.3m. \u2212$8.4m] \n Net +$110m over the three months to Oct 7; in on 18 days, out on 6.\n MBB\n SPMB\n Money in\n Money out, any fund\n Cumulative since Jul 9, drawn with a ground-colour casing so it reads over its own bars\n Daily: issuer share counts \u00d7 prior-day NAV.\n CSV \n \n Period by fund\n Dollars \u00b7 the total column adds the daily funds only\n Net flow by period for MBB and SPMB, the funds tracking the Bloomberg U.S. MBS Index, with the total over the funds with daily figures. Computed by ETFIQ. Period MBB SPMB Total, daily funds \n 1 day \u00b7 Oct 8 $0 counted to Oct 7 $0 1 of 2 with a figure \n 1 week \u00b7 Oct 2 to Oct 8 $0 \u2212$8.4m to Oct 7 \u2212$8.4m 1 of 2 with every day \n 1 month \u00b7 Sep 9 to Oct 8 \u2212$2.7bn \u2212$70.2m to Oct 7 \u2212$2.7bn 1 of 2 with every day \n 3 months \u00b7 Jul 9 to Oct 8 \u2212$2.0bn +$110m to Oct 7 \u2212$1.9bn 1 of 2 with every day \n Year to date \u2212$1.1bn +$574m to Oct 7 \u2212$572m 1 of 2 with every day \n 1 year \u2212$4.4bn +$841m to Oct 7 \u2212$3.6bn 1 of 2 with every day \n Same sources as above.\n CSV \n \n MBB daily \n Net assets, Jul 8 $39.3bn 3 months \u2212$2.0bn \u00b7 \u22125.1% Days / months in 2 \u00b7 out 6 Streak none Peer rank 1st of 3 Government mortgage-backed, 1M SEC check May: +$451m both; agree \n SPMB daily \n Net assets, Jul 8 $7.0bn 3 months +$110m \u00b7 1.6%, to Oct 7 Days / months in 18 \u00b7 out 6 Streak none Peer rank 2nd of 3 Government mortgage-backed, 1M SEC check Jun: +$125m both; agree \n\n Other sets, chosen by rule\n Funds tracking the same index. Each is a static page; the flows tool loads any of them.\n AGG, SPAB SPBO, VTC PBP, XYLD GOVZ, ZROZ USIG, CORP SPHY, BBHY SHY, BBSB TLT, BBLB TIP, VTP TBLL, TRSY QQQ, QQQM IWF, VONG IWM, VTWO IVV, SPY, SPYM, VOO SPYG, VOOG IJH, MDY Where these figures came from\n SEC Form N-PORT data sets: monthly sales and redemptions, item B.6 MBB: the filing that names its index (485BPOS, Jun 18, 2026) SPMB: the filing that names its index (485BPOS, Oct 24, 2025) ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.\n ETFIQ is an independent publisher and makes no recommendations; a rank is a sort of one published figure, not an opinion.\n\n Cite this page. ETFIQ, MBB and SPMB: money in and out, side by side, data as of Oct 8, 2026. https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/ Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data .\n Other forms Plain ETFIQ, MBB and SPMB: money in and out, side by side, data as of Oct 8, 2026. https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/ APA ETFIQ. (Oct 8, 2026). MBB and SPMB: money in and out, side by side. Retrieved from https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/ Markdown [MBB and SPMB: money in and out, side by side (ETFIQ, Oct 8, 2026)](https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/)","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 and SPMB: money in and out, side by side, data as of Oct 8, 2026. https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/"}