SPMB
US Aggregate BondState Street SPDR Portfolio Mortgage Backed Bond ETF
State Street · Tracks Bloomberg US MBS Index · Inception Jan 15, 2009
Composite score
Based on a 0.040% expense ratio.
Based on $7.07B in net assets.
Top-10 holdings represent 13.6% of net assets.
US Aggregate Bond base · ETF wrapper · 4.11% TTM yield.
The composite is a weighted average of the four core sub-scores above (cost, tax efficiency, liquidity, concentration). Missing sub-scores fall back to the per-category median when the category has at least 50% data coverage, so funds without (e.g.) parsed N-PORT holdings aren't accidentally boosted by renormalization. Tracking quality is shown where computable but isn't currently part of the composite weighting. See methodology for formulas, the tracking-quality partial-coverage rationale, and the dimensions we deliberately don't score (methodology v0.5.1).
Use SPMB in our tools
Tool · Cost
Compare SPMB's fee against another fund
Compounds the 0.040% expense ratio against a peer over decades.
Tool · Overlap
Compare SPMB's holdings with peers
Pairwise holdings heatmap, pre-loaded with similar US Aggregate Bond funds.
Tool · TLH
Find a tax-loss harvesting partner for SPMB
Ranks every catalog fund by holdings overlap, flags wash-sale risk.
Tool · Placement
Where should this fund live across your accounts?
Asset-location optimizer — places each fund in taxable / tax-deferred / Roth.
Top holdings
| # | Holding | Weight |
|---|---|---|
| 1 | State Street Global Advisors | 7.49% |
| 2 | Freddie Mac | 0.92% |
| 3 | Freddie Mac | 0.89% |
| 4 | Fannie Mae | 0.83% |
| 5 | Freddie Mac | 0.64% |
| 6 | Government National Mortgage Association | 0.62% |
| 7 | Freddie Mac | 0.60% |
| 8 | UMBS, TBA | 0.60% |
| 9 | Fannie Mae | 0.54% |
| 10 | Government National Mortgage Association | 0.52% |
Compare SPMB with another fund
Or skim the closest-overlap funds below.
Similar ETFs by holdings overlap
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