ETF comparison
BNDvsVMBS
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 roughly15.5%of each dollar exposed to the same underlying securities.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — seewhat we don't scorefor 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 thecost 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/Bond0.47%
- United States Treasury Note/Bond0.41%
- United States Treasury Note/Bond0.41%
- United States Treasury Note/Bond0.41%
- United States Treasury Note/Bond0.41%
- United States Treasury Note/Bond0.41%
- United States Treasury Note/Bond0.41%
- United States Treasury Note/Bond0.40%
- United States Treasury Note/Bond0.39%
- United States Treasury Note/Bond0.39%
Only in VMBS
1,508 total- Fannie Mae or Freddie Mac0.52%
- Ginnie Mae II Pool0.29%
- Freddie Mac Pool0.27%
- Fannie Mae or Freddie Mac0.25%
- Fannie Mae or Freddie Mac0.20%
- Fannie Mae Pool0.20%
- Fannie Mae or Freddie Mac0.19%
- Ginnie Mae II Pool0.15%
- Fannie Mae or Freddie Mac0.15%
- Ginnie Mae II Pool0.14%
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 methodologyand 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.