MBB
iShares MBS ETF
Stock · Financial Services · Asset Management - Bonds · US · $35.5B market cap
Held by ETFs$369M
Share of the company≈1%
Top-10 holding in10 ETFs
Built on MBB alone0 ETFs
Most per dollar · basketXAGG 0.0%
Biggest holderAPCB $119M
Every ETF built around MBB
Closest to the stock first, then outward.
Map · size = assets, color = YTDFundNameWhat it gives youMBB per $1,000YTDYieldFeeAssets
4Heaviest basketsMBB is the biggest slice; over $1B first10 funds hold it in their top 10
Where the ETF money in MBB sits
Other $336MIncome $33M
The ETF Tracker@TheETFTrackerTile size = dollars of MBB held · $369M across funds that list it in their top 10
The ETF TrackerWhere the ETF money in MBB sits@TheETFTracker · etftracker.io · Nov 2, 2026