ETF overview
The iShares MBS ETF, known by its symbol MBB, is structured to mirror the financial performance of a specific index. This index is made up of premium, mortgage-backed pass-through securities that have been either provided or secured by agencies of the United States government.
Current price
90.54 USD+0.06%
Close 21 Oct 2026Interval
BenchmarksFund facts
- Expense ratio
- 0.04%
- Fund assets
- 35.25B USD (all share classes)
- Issuer
- iShares
- Inception date
- Mar 13, 2007
- Number of holdings
- 10,811
Breakdown
Holdings (10,811)
| Name | Ticker | Weight |
|---|---|---|
| FHLMC 30YR UMBS SUPER 2.00% 05/01/2051 | 1.05% | |
| GNMA2 30YR TBA 6.00% 11/19/2026 | 0.62% | |
| UMBS 30YR TBA(REG A) 5.50% 11/12/2026 | 0.60% | |
| GNMA2 30YR 5.00% 11/20/2054 | 0.59% | |
| GNMA2 30YR 2.00% 10/20/2051 | 0.54% | |
| GNMA2 30YR 2.00% 12/20/2051 | 0.53% | |
| FNMA 30YR UMBS 2.00% 12/01/2051 | 0.53% | |
| GNMA2 30YR TBA(REG C) 5.50% 11/19/2026 | 0.53% | |
| GNMA2 30YR 2.50% 07/20/2051 | 0.52% | |
| FHLMC 30YR UMBS SUPER 2.00% 04/01/2051 | 0.51% | |
| and 10,798 more | ||
Historical returns do not guarantee future returns. This is not investment advice.
Benchmarks
Fund facts
- Expense ratio
- 0.04%
- Fund assets
- 35.25B USD (all share classes)
- Issuer
- iShares
- Inception date
- Mar 13, 2007
- Number of holdings
- 10,811
Breakdown
Holdings (10,811)
| Name | Ticker | Weight |
|---|---|---|
| FHLMC 30YR UMBS SUPER 2.00% 05/01/2051 | 1.05% | |
| GNMA2 30YR TBA 6.00% 11/19/2026 | 0.62% | |
| UMBS 30YR TBA(REG A) 5.50% 11/12/2026 | 0.60% | |
| GNMA2 30YR 5.00% 11/20/2054 | 0.59% | |
| GNMA2 30YR 2.00% 10/20/2051 | 0.54% | |
| GNMA2 30YR 2.00% 12/20/2051 | 0.53% | |
| FNMA 30YR UMBS 2.00% 12/01/2051 | 0.53% | |
| GNMA2 30YR TBA(REG C) 5.50% 11/19/2026 | 0.53% | |
| GNMA2 30YR 2.50% 07/20/2051 | 0.52% | |
| FHLMC 30YR UMBS SUPER 2.00% 04/01/2051 | 0.51% | |
| and 10,798 more | ||
ETF overview
The iShares MBS ETF, known by its symbol MBB, is structured to mirror the financial performance of a specific index. This index is made up of premium, mortgage-backed pass-through securities that have been either provided or secured by agencies of the United States government.
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