ETF Exchange > MBB ETF
MBB - ETF Fact Sheet
iShares MBS ETF - USD
Fund Identification
Ticker
MBB
ISIN
US4642885887
Main Metrics
Price
$90.59Expense Ratio
0.04%AuM
$35,267.25MTracking Difference
-0.03%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
-0.34%
1m flows
-$3,312M
* Net total returns
All data as of 16 October 2026
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MBB's characteristics
Manager
Manager statistics
1813 funds, $6,496.14Bn 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
26.57%
Other
73.43%
Sectors
Industrials
19.25%
Non-Corporate
7.10%
Other
73.65%
Top 5 holdings
Other
78.60%
BlackRock Cash Funds - Institutional
7.60%
FR SD8146, 2% 1may2051, USD (ABS)
0.98%
G2 MB0025, 5% 20nov2054, USD (ABS)
0.55%
G2 MA7648, 2% 20oct2051, USD (ABS)
0.51%
Total holdings
1,237
Total weight of top 5
88.24%