# Bloomberg U.S. MBS ETF fund flows: MBB and SPMB

> Three months to Oct 8, 2026: of 2 Bloomberg U.S. MBS ETFs counted throughout, SPMB took in the most, $110m to Oct 7.

Data as of Oct 8, 2026. Rebuilt every trading night.

Flows as of Oct 8, 2026 , the trading day.

Compare flows · the two Bloomberg U.S. MBS funds · daily figures

## MBB and SPMB: money in and out, side by side

Three months to Oct 8, 2026: of 2 Bloomberg U.S. MBS ETFs counted throughout, SPMB took in the most, $110m to Oct 7.

Open these funds in the flows tool

### Net flow, each fund on one scale

Last three months · small multiples · the cumulative line over each

MBB Daily, from the issuer’s count

Net −$2.0bn over the three months; in on 2 days, out on 6.

SPMB Daily, from the issuer’s count

Net +$110m over the three months to Oct 7; in on 18 days, out on 6.

- MBB

- SPMB

- Money in

- Money out, any fund

- Cumulative since Jul 9, drawn with a ground-colour casing so it reads over its own bars

Daily: issuer share counts × prior-day NAV.

CSV

### Period by fund

Dollars · the total column adds the daily funds only

| Period | MBB | SPMB | Total, daily funds |
| --- | --- | --- | --- |
| 1 day · Oct 8 | $0 | counted to Oct 7 | $0 1 of 2 with a figure |
| 1 week · Oct 2 to Oct 8 | $0 | −$8.4m to Oct 7 | −$8.4m 1 of 2 with every day |
| 1 month · Sep 9 to Oct 8 | −$2.7bn | −$70.2m to Oct 7 | −$2.7bn 1 of 2 with every day |
| 3 months · Jul 9 to Oct 8 | −$2.0bn | +$110m to Oct 7 | −$1.9bn 1 of 2 with every day |
| Year to date | −$1.1bn | +$574m to Oct 7 | −$572m 1 of 2 with every day |
| 1 year | −$4.4bn | +$841m to Oct 7 | −$3.6bn 1 of 2 with every day |

Same sources as above.

CSV

MBB daily

Net assets, Jul 8 $39.3bn 3 months −$2.0bn · −5.1% Days / months in 2 · out 6 Streak none Peer rank 1st of 3 Government mortgage-backed, 1M SEC check May: +$451m both; agree

SPMB daily

Net assets, Jul 8 $7.0bn 3 months +$110m · 1.6%, to Oct 7 Days / months in 18 · out 6 Streak none Peer rank 2nd of 3 Government mortgage-backed, 1M SEC check Jun: +$125m both; agree

### Other sets, chosen by rule

Funds tracking the same index. Each is a static page; the flows tool loads any of them.

### 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.

ETFIQ is an independent publisher and makes no recommendations; a rank is a sort of one published figure, not an opinion.

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Source: ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.
Cite: 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/
Licence: https://etfiq.com/license/ Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.
HTML: https://etfiq.com/flows/compare/by-index/bloomberg-us-mbs/