ETF comparison
BND vs VMBS
Both US Aggregate Bond.
Vanguard Total Bond Market Index Fund ETF Shares · Vanguard Mortgage-Backed Securities Index Fund ETF Shares
Holdings overlap
3,604 positions appear in both funds. Buying equal dollars of BND and VMBS would leave roughly 15.5% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
Expense ratios are effectively identical (0.030% vs 0.030%).
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with BND vs VMBS.
Top shared holdings
3,604 shared in total| # | Holding | In BND | In VMBS | Overlap |
|---|---|---|---|---|
| 1 | Ginnie Mae II Pool | 0.07% | 0.08% | 0.07% |
| 2 | Fannie Mae Pool | 0.06% | 0.17% | 0.06% |
| 3 | Fannie Mae Pool | 0.06% | 0.23% | 0.06% |
| 4 | Ginnie Mae II Pool | 0.06% | 0.29% | 0.06% |
| 5 | Freddie Mac Pool | 0.06% | 0.23% | 0.06% |
| 6 | Ginnie Mae II Pool | 0.06% | 0.22% | 0.06% |
| 7 | Fannie Mae Pool | 0.06% | 0.07% | 0.06% |
| 8 | Ginnie Mae II Pool | 0.05% | 0.28% | 0.05% |
| 9 | Freddie Mac Pool | 0.05% | 0.14% | 0.05% |
| 10 | Fannie Mae Pool | 0.05% | 0.18% | 0.05% |
| 11 | Ginnie Mae II Pool | 0.05% | 0.16% | 0.05% |
| 12 | Ginnie Mae II Pool | 0.05% | 0.17% | 0.05% |
Only in BND
13,792 total- United States Treasury Note/Bond 0.47%
- United States Treasury Note/Bond 0.41%
- United States Treasury Note/Bond 0.41%
- United States Treasury Note/Bond 0.41%
- United States Treasury Note/Bond 0.41%
- United States Treasury Note/Bond 0.41%
- United States Treasury Note/Bond 0.41%
- United States Treasury Note/Bond 0.40%
- United States Treasury Note/Bond 0.39%
- United States Treasury Note/Bond 0.39%
Only in VMBS
1,508 total- Fannie Mae or Freddie Mac 0.52%
- Ginnie Mae II Pool 0.29%
- Freddie Mac Pool 0.27%
- Fannie Mae or Freddie Mac 0.25%
- Fannie Mae or Freddie Mac 0.20%
- Fannie Mae Pool 0.20%
- Fannie Mae or Freddie Mac 0.19%
- Ginnie Mae II Pool 0.15%
- Fannie Mae or Freddie Mac 0.15%
- Ginnie Mae II Pool 0.14%
Related comparisons
More comparisons with BND
- BND vs IEI · iShares 3-7 Year Treasury Bond ETF 15.4%
- BND vs SPIB · State Street SPDR Portfolio Intermediate Term Corporate Bond ETF 15.4%
- BND vs FBND · Fidelity Total Bond ETF 15.0%
- BND vs LQD · iShares iBoxx $ Investment Grade Corporate Bond ETF 13.6%
- BND vs SPTL · State Street SPDR Portfolio Long Term Treasury ETF 10.2%
- BND vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 10.0%
More comparisons with VMBS
- VMBS vs SCHZ · Schwab U.S. Aggregate Bond ETF 10.9%
- VMBS vs SPAB · State Street SPDR Portfolio Aggregate Bond ETF 9.7%
- VMBS vs EAGG · iShares ESG U.S. Aggregate Bond ETF 7.7%
- VMBS vs AGG · iShares Core U.S. Aggregate Bond ETF 7.6%
- VMBS vs IUSB · iShares Core Universal USD Bond ETF 4.7%
- VMBS vs VCRB · Vanguard Core Bond ETF 4.6%
Percentages are holdings overlap with the named fund.
Open BND or VMBS at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.