VMBS
US Aggregate BondVanguard Mortgage-Backed Securities Index Fund ETF Shares
Vanguard · Tracks Bloomberg US MBS Float Adjusted Index · Inception Nov 19, 2009
Trailing returns
through Oct 23, 2026- 1 year
- +0.2%
- 3 year
- +6.3%
- annualized
- 5 year
- +0.3%
- annualized
Price return from month-end closes, distributions reinvested at month end. Excludes trading costs, bid-ask spreads and taxes. Past performance says nothing about future returns and is not part of the composite score — see the methodology for what the score does measure.
Composite score
Based on a 0.030% expense ratio.
Based on $17.10B in net assets for the whole fund, all 3 share classes. Our sources don't report the ETF class alone.
Top-10 holdings represent 3.2% of net assets.
US Aggregate Bond base · ETF wrapper · 4.35% 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 v0.5.2).
Look through VMBS, or compare the fee
Tool · Look-through
Underlying holdings, with other funds added
Add tickers and weights; N-PORT positions are summed across the basket.
Tool · Cost
Compare VMBS's fee against another fund
Compounds the 0.030% expense ratio against a peer over decades.
Tool · Overlap
Compare VMBS's holdings with peers
Pairwise holdings heatmap, pre-loaded with similar US Aggregate Bond funds.
Tool · TLH
Find a tax-loss harvesting partner for VMBS
Ranks every catalog fund by holdings overlap, flags wash-sale risk.
Tool · Placement
Asset location for VMBS across account types
Asset-location optimizer — places each fund in taxable / tax-deferred / Roth.
Top holdings
| # | Holding | Weight |
|---|---|---|
| 1 | Fannie Mae or Freddie Mac | 0.52% |
| 2 | Ginnie Mae II Pool | 0.36% |
| 3 | Ginnie Mae II Pool | 0.32% |
| 4 | Ginnie Mae II Pool | 0.31% |
| 5 | Fannie Mae Pool | 0.29% |
| 6 | Ginnie Mae II Pool | 0.29% |
| 7 | Ginnie Mae II Pool | 0.29% |
| 8 | Ginnie Mae II Pool | 0.28% |
| 9 | Freddie Mac Pool | 0.27% |
| 10 | Freddie Mac Pool | 0.27% |
Compare VMBS with another fund
Or skim the closest-overlap funds below.
Similar ETFs by holdings overlap
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