NASDAQ · MBB
iShares MBS ETF
ETF · Fixed Income
$91.81▲ 0.64% ($0.58)at close
After hours$91.82▲ 0.01%7:30 PM ET
52-week
$91.02$96.97
AUM
$38.91B
Expense ratio
0.04%
Holdings
11,211
Top 10 weight
12.72%
Price history
Return · Sep 17, 2025 – 2026
▼ 3.8% ($3.63)
Performance
Monthly returns
Loading monthly returns.
ETF snapshot
NAV$91.33
Premium / discount0.53%
52w high$96.97
52w low$91.02
Volume1.99M
UpdatedSep 15, 2026
Data freshness · fund info Sep 15, 2026 · holdings Sep 18, 2026
What you own
Industry / sectorCash & Others 100%
RegionNorth America 105.19%
CountryUnited States 105.19%
Concentration
Top holding—
Top 10 holdings12.72%
Holdings coverage105.31%
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 12, 2007
Average volume2.29M
TickerMBB