NASDAQ · MBB
iShares MBS ETF
ETF · Fixed Income
$92.04▲ 0.39% ($0.36)at close
Pre-market$91.62▼ 0.46%4:01 AM ET
52-week
$88.58$96.97
AUM
$35.89B
Expense ratio
0.04%
Holdings
10,833
Top 10 weight
Price history
Return · Oct 30, 2025 – 2026
▼ 3.61% ($3.45)
Performance
Monthly returns
View as
Loading monthly returns.
ETF snapshot
NAV$91.96
Premium / discount0.09%
52w high$96.97
52w low$88.58
Volume2.96M
UpdatedNov 1, 2026
Data freshness · fund info Nov 1, 2026 · holdings Nov 1, 2026
What you own
Industry / sectorFederal National Mortgage Association 42.64%
RegionNorth America 94.69%
CountryUnited States 94.69%
Concentration
Top holding—
Top 10 holdings11.17%
Holdings coverage104.87%
Fund profile
The iShares MBS ETF, known by its symbol MBB, is structured to mirror the financial performance of a specific index.
IssuerIShares
Asset classFixed Income
DomicileUS
InceptionMar 13, 2007
Average volume4.23M
TickerMBB