ETF comparison
FBND vs SPAB
Both US Aggregate Bond.
Fidelity Total Bond ETF · State Street SPDR Portfolio Aggregate Bond ETF
Holdings overlap
514 positions appear in both funds. Buying equal dollars of FBND and SPAB would leave roughly 14.6% 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
SPAB is 33 bps cheaper than FBND. On a $100,000 position that's about $330/yr more in fees for FBND.
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 FBND vs SPAB.
Top shared holdings
514 shared in total| # | Holding | In FBND | In SPAB | Overlap |
|---|---|---|---|---|
| 1 | UST NOTES | 1.02% | 0.40% | 0.40% |
| 2 | UST NOTES | 2.17% | 0.40% | 0.40% |
| 3 | UST NOTES | 0.47% | 0.37% | 0.37% |
| 4 | UST NOTES | 0.48% | 0.37% | 0.37% |
| 5 | UST NOTES | 0.87% | 0.37% | 0.37% |
| 6 | UST NOTES | 1.81% | 0.37% | 0.37% |
| 7 | UST NOTES | 2.21% | 0.36% | 0.36% |
| 8 | UST NOTES | 0.93% | 0.33% | 0.33% |
| 9 | UST NOTES | 0.35% | 0.32% | 0.32% |
| 10 | GNMA II GTD PASS THRU CTF MULTIPLE ISSUER | 0.32% | 0.28% | 0.28% |
| 11 | UST NOTES | 0.54% | 0.28% | 0.28% |
| 12 | UST NOTES | 0.30% | 0.26% | 0.26% |
Only in FBND
3,955 total- Fidelity Revere Street Trust 4.62%
- FNMA/FHLG TBA ISSUER 1.19%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 1.14%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 0.89%
- FNMA/FHLG TBA ISSUER 0.73%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 0.45%
- FNMA/FHLG TBA ISSUER 0.44%
- UST NOTES 0.42%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 0.41%
- FNMA/FHLG TBA ISSUER 0.39%
Only in SPAB
7,771 total- United States Treasury 0.79%
- United States Treasury 0.44%
- United States Treasury 0.43%
- United States Treasury 0.42%
- United States Treasury 0.39%
- United States Treasury 0.38%
- United States Treasury 0.34%
- United States Treasury 0.34%
- United States Treasury 0.32%
- United States Treasury 0.31%
Related comparisons
More comparisons with FBND
- FBND vs IUSB · iShares Core Universal USD Bond ETF 14.4%
- FBND vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 12.5%
- FBND vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 12.0%
- FBND vs TLT · iShares 20+ Year Treasury Bond ETF 11.6%
- FBND vs DFCF · Dimensional Core Fixed Income ETF 9.5%
- FBND vs VCRB · Vanguard Core Bond ETF 8.3%
More comparisons with SPAB
- SPAB vs SHY · iShares 1-3 Year Treasury Bond ETF 14.3%
- SPAB vs VMBS · Vanguard Mortgage-Backed Securities Index Fund ETF Shares 9.7%
- SPAB vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 9.6%
- SPAB vs CGCP · Capital Group Core Plus Income ETF 7.7%
- SPAB vs JCPB · JPMorgan Core Plus Bond ETF 6.2%
- SPAB vs MBB · iShares MBS ETF 5.7%
Percentages are holdings overlap with the named fund.
Open FBND 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.