MBB
US Aggregate BondiShares MBS ETF
iShares · Tracks Bloomberg US MBS Index · Inception Mar 13, 2007
Expense ratio
0.040%
4.0 bps
Net assets
$38.31B
TTM yield
4.23%
Last price
$93.76
as of May 20, 2026
Composite score
85 / 100
Cost 96
Based on a 0.040% expense ratio.
Liquidity 100
Based on $38.31B in net assets.
Concentration N/A
No holdings data available — N-PORT not filed or fund is not a 1940-Act registrant.
Tax efficiency 45
US Aggregate Bond base · ETF wrapper · 4.23% TTM yield.
Tracking quality N/A
Planned for a future methodology version. Not yet computed.
Scores reflect available inputs only. The composite is a weighted average over present sub-scores; weights renormalize when components are unavailable. See methodology for formulas (methodology v0.3.0).
Top holdings
No holdings data available for this fund.
Compare MBB with another fund
Or skim the closest-overlap funds below.