ETF Exchange > MBB ETF
MBB - ETF Fact Sheet
iShares MBS ETF - USD
Fund Identification
Ticker
MBB
ISIN
US4642885887
Main Metrics
Price
$92.40Expense Ratio
0.04%AuM
$39,362.08MTracking Difference
-0.05%Ratings
Trackinsight rating
★★★★★Official Investment Strategy
The iShares MBS ETF (MBB) seeks to track the investment results of an index composed of investment-grade mortgage-backed pass-through securities issued and/or guaranteed by U.S. government agencies.
MBB's historical prices, performance, and flows
1m returns
0.18%
1m flows
$655M
* Net total returns
All data as of 1 September 2026
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MBB's characteristics
Manager
Manager statistics
1801 funds, $6,511.26Bn in AUM
Benchmark
Bloomberg U.S. MBS Total Return Index - USD
Replication method
Direct (Physical)
Asset class
Fixed Income
Dividend policy
Distributing
MBB's exposure
Countries
USA
27.34%
Other
72.66%
Sectors
Industrials
19.68%
Non-Corporate
7.43%
Other
72.88%
Top 5 holdings
Other
77.26%
BlackRock Cash Funds - Institutional
7.91%
FR SD8146, 2% 1may2051, USD (ABS)
1.00%
G2 MB0025, 5% 20nov2054, USD (ABS)
0.53%
G2 MA7648, 2% 20oct2051, USD (ABS)
0.52%
Total holdings
1,231
Total weight of top 5
87.22%