SPMB
State Street SPDR Portfolio Mortgage Backed Bond ETF
Stock · Financial Services · Asset Management - Bonds · US · $6.9B market cap
Held by ETFs$93M
Share of the company≈1%
Top-10 holding in2 ETFs
Built on SPMB alone0 ETFs
Most per dollar · basket—
Biggest holderFISR $88M
Every ETF built around SPMB
Closest to the stock first, then outward.
Map · size = assets, color = YTDFundNameWhat it gives youSPMB per $1,000YTDYieldFeeAssets
4Heaviest basketsSPMB is the biggest slice; over $1B first2 funds hold it in their top 10
Where the ETF money in SPMB sits
Other $93M
The ETF Tracker@TheETFTrackerTile size = dollars of SPMB held · $93M across funds that list it in their top 10
The ETF TrackerWhere the ETF money in SPMB sits@TheETFTracker · etftracker.io · Nov 2, 2026