ETF comparison
BND vs SPAB
Both US Aggregate Bond.
Vanguard Total Bond Market Index Fund ETF Shares · State Street SPDR Portfolio Aggregate Bond ETF
Holdings overlap
6,598 positions appear in both funds. Buying equal dollars of BND and SPAB would leave roughly 58.8% 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 SPAB.
Top shared holdings
6,598 shared in total| # | Holding | In BND | In SPAB | Overlap |
|---|---|---|---|---|
| 1 | United States Treasury Note/Bond | 0.47% | 0.42% | 0.42% |
| 2 | United States Treasury Note/Bond | 0.41% | 0.40% | 0.40% |
| 3 | United States Treasury Note/Bond | 0.39% | 0.40% | 0.39% |
| 4 | United States Treasury Note/Bond | 0.41% | 0.37% | 0.37% |
| 5 | United States Treasury Note/Bond | 0.39% | 0.37% | 0.37% |
| 6 | United States Treasury Note/Bond | 0.41% | 0.37% | 0.37% |
| 7 | United States Treasury Note/Bond | 0.41% | 0.37% | 0.37% |
| 8 | United States Treasury Note/Bond | 0.41% | 0.36% | 0.36% |
| 9 | United States Treasury Note/Bond | 0.40% | 0.34% | 0.34% |
| 10 | United States Treasury Note/Bond | 0.36% | 0.34% | 0.34% |
| 11 | United States Treasury Note/Bond | 0.41% | 0.32% | 0.32% |
| 12 | United States Treasury Note/Bond | 0.36% | 0.32% | 0.32% |
Only in BND
10,798 total- United States Treasury Note/Bond 0.35%
- United States Treasury Note/Bond 0.34%
- United States Treasury Note/Bond 0.28%
- United States Treasury Note/Bond 0.22%
- United States Treasury Note/Bond 0.19%
- United States Treasury Note/Bond 0.19%
- United States Treasury Note/Bond 0.18%
- United States Treasury Note/Bond 0.16%
- United States Treasury Note/Bond 0.16%
- United States Treasury Note/Bond 0.15%
Only in SPAB
1,687 total- Fannie Mae 0.21%
- United States Treasury 0.17%
- Government National Mortgage Association 0.17%
- Freddie Mac 0.14%
- Freddie Mac 0.12%
- Fannie Mae 0.11%
- Fannie Mae 0.11%
- Government National Mortgage Association 0.10%
- Fannie Mae 0.09%
- Freddie Mac 0.09%
Related comparisons
More comparisons with BND
- BND vs IUSB · iShares Core Universal USD Bond ETF 57.4%
- BND vs GVI · iShares Intermediate Government/Credit Bond ETF 53.4%
- BND vs EAGG · iShares ESG U.S. Aggregate Bond ETF 51.1%
- BND vs BSV · Vanguard Short-Term Bond Index Fund ETF Shares 36.9%
- BND vs GOVT · iShares U.S. Treasury Bond ETF 32.9%
- BND vs AGGY · WisdomTree Yield Enhanced U.S. Aggregate Bond Fund 24.8%
More comparisons with SPAB
- SPAB vs AGG · iShares Core U.S. Aggregate Bond ETF 56.7%
- SPAB vs IUSB · iShares Core Universal USD Bond ETF 51.5%
- SPAB vs GVI · iShares Intermediate Government/Credit Bond ETF 49.4%
- SPAB vs EAGG · iShares ESG U.S. Aggregate Bond ETF 46.0%
- SPAB vs BSV · Vanguard Short-Term Bond Index Fund ETF Shares 34.9%
- SPAB vs GOVT · iShares U.S. Treasury Bond ETF 29.7%
Percentages are holdings overlap with the named fund.
Open BND or SPAB 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.