# MBBA (iShares Mortgage-Backed Securities Active ETF)

iShares · Bond ETFs · Government mortgage-backed · data as of Oct 14, 2026

MBBA returned −2.8% from Jan 26, 2026 to Oct 14, 2026, charges 0.25% a year and holds $721m in net assets on Oct 14, 2026.

MBBA is actively managed and returned −2.8% since it first traded on Jan 26, 2026.

## Key facts

- MBBA, total return, since launch, Jan 26, 2026: −2.8%, as of Oct 14, 2026.
- MBBA, expense ratio: 0.25%, as of Oct 14, 2026.
- MBBA, holdings: 695, as of Oct 14, 2026.
- MBBA, below its high: −4.5%, as of Oct 14, 2026.
- MBBA, last payment (paid monthly), ex-date Oct 1, 2026: $0.0747, as of Oct 14, 2026.
- MBBA, net assets: $721m (the issuer’s own daily fund list, as of Oct 14, 2026).

## MBBA over each window to Oct 14, 2026

| Window | Total return |
| --- | --- |
| 1 month | −1.0% |
| 3 months | −3.5% |
| 6 months | −3.5% |
| Since launch | −2.8% |

## Every published field

| Field | Value | Source |
| --- | --- | --- |
| What it tracks | No index, actively managed | ETFIQ |
| Fund type | Bond fund | ETFIQ |
| Category | Bonds · Government mortgage-backed | ETFIQ |
| Expense ratio | 0.25% | 485BPOS XBRL, Aug 27, 2026 |
| Price | $47.22 | ETFIQ |
| First traded | Jan 26, 2026 | ETFIQ |
| Net assets | $721m | the issuer’s own daily fund list, as of Oct 14, 2026 |
| Benchmark | Its own holdings, as of Oct 13, 2026; its prospectus names no index it tracks | ETFIQ, from its filings |
| Below its high | −4.5% | ETFIQ |
| Holdings | 695 | ETFIQ |
| Top ten weight | not published | ETFIQ |
| Holdings published for | Oct 13, 2026 | the issuer’s daily file |
| Holdings as of the close of | Oct 13, 2026 | the issuer’s daily file |
| Why no share is published | Holdings are gross exposure, not a portfolio | ETFIQ |

## Money in and out, to Oct 14, 2026

| Window | Dates | Net flow |
| --- | --- | --- |
| 1 day | Oct 14, 2026 | +$1.9m |
| 1 week | Oct 8, 2026 to Oct 14, 2026 | +$7.5m |
| 1 month | Sep 15, 2026 to Oct 14, 2026 | +$576m |
| 3 months | Jul 15, 2026 to Oct 14, 2026 | +$583m |

Daily counts start Jan 26, 2026, so these windows have no daily figure: Year to date, 1 year.

Computed by ETFIQ from the change in shares outstanding times the previous day’s NAV. Every day and month: https://etfiq.com/data/flows/funds/mbba.json. Method: https://etfiq.com/methodology/flows

## Questions

### What does MBBA cost?

The prospectus expense ratio is 0.25% a year.

### How far is MBBA below its high?

4.5% below its high of Feb 27, 2026, measured on the reinvested series to Oct 14, 2026.


## Cite this page

ETFIQ, MBBA, bond fund, data as of Oct 14, 2026. https://etfiq.com/funds/mbba
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at https://etfiq.com/data/.

HTML: https://etfiq.com/funds/mbba  ·  JSON: https://etfiq.com/funds/mbba.json