ETF comparison
BNDvsSPMB
Both US Aggregate Bond.
Vanguard Total Bond Market Index Fund ETF Shares · State Street SPDR Portfolio Mortgage Backed Bond ETF
Holdings overlap
845 positions appear in both funds. Buying equal dollars of BND and SPMB would leave roughly5.9%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
BND is 1 bps cheaper than SPMB. On a $100,000 position that's about $10/yr more in fees for SPMB.
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 SPMB.
Top shared holdings
845 shared in total| # | Holding | In BND | In SPMB | Overlap |
|---|---|---|---|---|
| 1 | Ginnie Mae II Pool | 0.11% | 0.36% | 0.11% |
| 2 | Ginnie Mae II Pool | 0.07% | 0.23% | 0.07% |
| 3 | Fannie Mae Pool | 0.06% | 0.26% | 0.06% |
| 4 | Fannie Mae Pool | 0.06% | 0.14% | 0.06% |
| 5 | Ginnie Mae II Pool | 0.06% | 0.42% | 0.06% |
| 6 | Freddie Mac Pool | 0.06% | 0.29% | 0.06% |
| 7 | Fannie Mae Pool | 0.06% | 0.17% | 0.06% |
| 8 | Freddie Mac Pool | 0.05% | 0.23% | 0.05% |
| 9 | Fannie Mae Pool | 0.05% | 0.26% | 0.05% |
| 10 | Fannie Mae or Freddie Mac | 0.05% | 0.20% | 0.05% |
| 11 | Ginnie Mae II Pool | 0.05% | 0.32% | 0.05% |
| 12 | Ginnie Mae II Pool | 0.06% | 0.05% | 0.05% |
Only in BND
16,551 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 SPMB
1,855 total- State Street Global Advisors1.03%
- Fannie Mae0.49%
- Fannie Mae0.47%
- Fannie Mae0.45%
- Freddie Mac0.44%
- Fannie Mae0.37%
- Fannie Mae0.36%
- Fannie Mae0.35%
- Fannie Mae0.35%
- Freddie Mac0.35%
Open BND or SPMB 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.