iShares MBS ETF
Price through Oct 27, 2026 · Flows through Oct 26, 2026. Figures use the latest available records, not a live quote. Fund details retrieved Oct 27, 2026. Holdings snapshot retrieved Oct 27, 2026.
he Fund will invest at least 80% of its assets in the component securities of the underlying index and TBAs that have economic characteristics that are substantially identical to the economic characteristics of the component securities of the index, and the fund will invest at least 90% of its assets in fixed income securities of the types included in the underlying index that BFA believes will help the fund track the index.
MBB price
Table
| Date | MBB close |
|---|---|
| Jul 27, 2026 | $93.37 |
| Jul 28, 2026 | $93.67 |
| Jul 29, 2026 | $93.23 |
| Jul 30, 2026 | $93.29 |
| Jul 31, 2026 | $92.92 |
| Aug 3, 2026 | $92.72 |
| Aug 4, 2026 | $93.30 |
| Aug 5, 2026 | $93.34 |
| Aug 6, 2026 | $93.01 |
| Aug 7, 2026 | $93.27 |
| Aug 10, 2026 | $92.92 |
| Aug 11, 2026 | $93.03 |
| Aug 12, 2026 | $93.19 |
| Aug 13, 2026 | $93.49 |
| Aug 14, 2026 | $93.20 |
| Aug 17, 2026 | $93.05 |
| Aug 18, 2026 | $93.08 |
| Aug 19, 2026 | $93.57 |
| Aug 20, 2026 | $93.30 |
| Aug 21, 2026 | $93.12 |
| Aug 24, 2026 | $93.31 |
| Aug 25, 2026 | $93.77 |
| Aug 26, 2026 | $93.58 |
| Aug 27, 2026 | $93.52 |
| Aug 28, 2026 | $93.17 |
| Aug 31, 2026 | $93.10 |
| Sep 1, 2026 | $92.41 |
| Sep 2, 2026 | $92.51 |
| Sep 3, 2026 | $92.66 |
| Sep 4, 2026 | $92.72 |
| Sep 8, 2026 | $92.53 |
| Sep 9, 2026 | $92.22 |
| Sep 10, 2026 | $91.48 |
| Sep 11, 2026 | $91.38 |
| Sep 14, 2026 | $91.22 |
| Sep 15, 2026 | $91.24 |
| Sep 16, 2026 | $91.22 |
| Sep 17, 2026 | $91.81 |
| Sep 18, 2026 | $91.29 |
| Sep 21, 2026 | $91.59 |
| Sep 22, 2026 | $91.45 |
| Sep 23, 2026 | $90.53 |
| Sep 24, 2026 | $89.86 |
| Sep 25, 2026 | $90.34 |
| Sep 28, 2026 | $89.66 |
| Sep 29, 2026 | $89.52 |
| Sep 30, 2026 | $89.62 |
| Oct 1, 2026 | $89.55 |
| Oct 2, 2026 | $89.22 |
| Oct 5, 2026 | $89.09 |
| Oct 6, 2026 | $89.36 |
| Oct 7, 2026 | $89.22 |
| Oct 8, 2026 | $89.73 |
| Oct 9, 2026 | $89.79 |
| Oct 12, 2026 | $89.83 |
| Oct 13, 2026 | $89.97 |
| Oct 14, 2026 | $90.00 |
| Oct 15, 2026 | $90.59 |
| Oct 16, 2026 | $90.52 |
| Oct 19, 2026 | $90.22 |
| Oct 20, 2026 | $90.49 |
| Oct 21, 2026 | $90.54 |
| Oct 22, 2026 | $91.38 |
| Oct 23, 2026 | $91.29 |
| Oct 26, 2026 | $91.52 |
| Oct 27, 2026 | $91.55 |
Weekly net flows, 3M
Net outflow over the range: −$2.6B
- Inflow / above zero
- Outflow / below zero
Show as table
| Label | Value ($) |
|---|---|
| Jul 27 | $198.7M |
| Aug 3 | −$198.7M |
| Aug 10 | $94 |
| Aug 17 | −$186 |
| Aug 24 | $820.8M |
| Aug 31 | −$162.8M |
| Sep 7 | −$91 |
| Sep 14 | $92 |
| Sep 21 | −$1.4B |
| Sep 28 | −$1.2B |
| Oct 5 | −$90 |
| Oct 12 | −$663.9M |
| Oct 19 | $850.5K |
| Oct 26 | $0 |
Money is leaving — −$1.9B in net outflows over the past month, about 5.3% of the fund's asset base, while the price has returned -3.9% so far this year. At 0.040% a year it is not the cheapest way in — AGG has a reported fee of 0.03%.
COMPOSED FROM THE FUND’S OWN DAILY RECORDS · UPDATED WITH EACH REFRESH
CELL SIZE IS PORTFOLIO WEIGHT · COLOR IS THE CHANGE IN THE LATEST AVAILABLE SNAPSHOT · TOP 40 POSITIONS
| # | Holding | Weight | Price | Day | 52-wk | |
|---|---|---|---|---|---|---|
| 1 | —GNMA2 30YR TBA(REG C) | 0.99% | — | — | — | |
| 2 | —UMBS 30YR TBA(REG A) | 0.84% | — | — | — | |
| 3 | —UMBS 30YR TBA(REG A) | 0.78% | — | — | — | |
| 4 | —GNMA2 30YR TBA(REG C) | 0.68% | — | — | — | |
| 5 | —GNMA2 30YR | 0.56% | — | — | — | |
| 6 | —GNMA2 30YR | 0.55% | — | — | — | |
| 7 | —GNMA2 30YR | 0.54% | — | — | — | |
| 8 | —FNMA 30YR UMBS | 0.53% | — | — | — | |
| 9 | —FHLMC 30YR UMBS SUPER | 0.51% | — | — | — | |
| 10 | —GNMA2 30YR TBA(REG C) | 0.46% | — | — | — | |
| 11 | —GNMA2 30YR | 0.46% | — | — | — | |
| 12 | —FNMA 30YR UMBS | 0.45% | — | — | — | |
| 13 | —FNMA 30YR UMBS SUPER | 0.44% | — | — | — | |
| 14 | —GNMA2 30YR | 0.42% | — | — | — | |
| 15 | —GNMA2 30YR | 0.37% | — | — | — |
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- Agency Fixed Rate93.82%
- Cash and/or Derivatives1.53%
Show as table
| Item | Value (%) |
|---|---|
| Agency Fixed Rate | 93.82% |
| Cash and/or Derivatives | 1.53% |
| 1 week | +1.1% |
| 1 month | +1.3% |
| 3 months | -1.9% |
| 6 months | -3.9% |
| YTD | -3.9% |
| 1 year | -4.8% |
| 3 years | — |
PRICE RETURN, DISTRIBUTIONS NOT REINVESTED
| 1 week | +$77M |
| 1 month | −$1.9B |
| 3 months | −$2.6B |
| YTD | −$1.8B |
| 1 year | −$4.8B |
CREATION/REDEMPTION DOLLARS, DAILY RECORDS
Monthly net flows
- Inflow / above zero
- Outflow / below zero
Show as table
| Label | Value ($) |
|---|---|
| Oct | −$166.8M |
| Nov | −$2.5B |
| Dec | −$142.5M |
| Jan | $106.3M |
| Feb | $0 |
| Mar | −$285.2M |
| Apr | −$342M |
| May | $0 |
| Jul | $1.6B |
| Aug | $459.3M |
| Sep | −$1.9B |
| Oct | −$1.4B |
The top holding is 1.1% of the book; the top ten carry 7%. Spread across 250+ names, it behaves like roughly 145 equally-weighted positions.
VOLATILITY & DRAWDOWN FROM THE DAILY TAPE · CONCENTRATION FROM THE LATEST DISCLOSED BOOK
Due diligence cuts both ways. These funds sit on the same shelf and beat MBB on at least one dimension that matters — the fee, the asset base, or where the money is going.
| Fund | Fee | Assets | Flow, 1M | The case | |
|---|---|---|---|---|---|
| STIP iShares 0-5 Year TIPS Bond ETF | 0.03% | $16.4B | +$489M | -1bp on fee · +$489M in over the month | Head-to-head |
| IJH iShares Core S&P Mid-Cap ETF | 0.05% | $123.5B | +$2.3B | 3× the assets · +$2.3B in over the month | Head-to-head |
| IGSB iShares 1-5 Year Investment Grade Corporate Bond ETF | 0.04% | $23.7B | +$51M | +$51M in over the month | Head-to-head |
| IGIB iShares 5-10 Year Investment Grade Corporate Bond ETF | 0.04% | $18.6B | +$412M | +$412M in over the month | Head-to-head |
| MUB iShares National Muni Bond ETF | 0.05% | $48B | +$2B | +$2B in over the month | Head-to-head |