ETF comparison
FBND vs IUSB
Both US Aggregate Bond.
Fidelity Total Bond ETF · iShares Core Universal USD Bond ETF
Holdings overlap
1,375 positions appear in both funds. Buying equal dollars of FBND and IUSB would leave roughly 14.7% 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
IUSB is 30 bps cheaper than FBND. On a $100,000 position that's about $300/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 IUSB.
Top shared holdings
1,375 shared in total| # | Holding | In FBND | In IUSB | Overlap |
|---|---|---|---|---|
| 1 | UST NOTES | 2.73% | 0.37% | 0.37% |
| 2 | UST NOTES | 0.79% | 0.35% | 0.35% |
| 3 | UST NOTES | 1.97% | 0.34% | 0.34% |
| 4 | UST NOTES | 0.42% | 0.34% | 0.34% |
| 5 | UST NOTES | 0.92% | 0.34% | 0.34% |
| 6 | UST NOTES | 1.04% | 0.33% | 0.33% |
| 7 | UST NOTES | 2.04% | 0.33% | 0.33% |
| 8 | UST NOTES | 0.54% | 0.33% | 0.33% |
| 9 | UST NOTES | 0.87% | 0.32% | 0.32% |
| 10 | UST NOTES | 0.44% | 0.29% | 0.29% |
| 11 | UST NOTES | 0.32% | 0.27% | 0.27% |
| 12 | UST NOTES | 0.29% | 0.26% | 0.26% |
Only in FBND
3,255 total- Fidelity Revere Street Trust 3.16%
- FNMA/FHLG TBA ISSUER 1.99%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 1.28%
- FNMA/FHLG TBA ISSUER 1.25%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 0.97%
- FNMA/FHLG TBA ISSUER 0.57%
- UST NOTES 0.49%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 0.46%
- FNMA/FHLG TBA ISSUER 0.31%
- GNMA II GTD PASS THRU CTF MULTIPLE ISSUER 0.30%
Only in IUSB
16,669 total- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.41%
- United States of America 0.33%
- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.31%
- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.30%
- United States of America 0.30%
- United States of America 0.29%
- United States of America 0.29%
- United States of America 0.29%
- United States of America 0.29%
- United States of America 0.28%
Related comparisons
More comparisons with FBND
- FBND vs SPAB · State Street SPDR Portfolio Aggregate Bond Index ETF 14.6%
- FBND vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 12.1%
- FBND vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 12.1%
- FBND vs TLT · iShares 20+ Year Treasury Bond ETF 11.6%
- FBND vs DFCF · Dimensional Core Fixed Income ETF 9.3%
- FBND vs VCRB · Vanguard Core Bond ETF 8.3%
More comparisons with IUSB
- IUSB vs VCRB · Vanguard Core Bond ETF 14.6%
- IUSB vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 14.3%
- IUSB vs VGSH · Vanguard Short-Term Treasury Index Fund ETF Shares 14.1%
- IUSB vs SHY · iShares 1-3 Year Treasury Bond ETF 13.9%
- IUSB vs MBB · iShares MBS ETF 9.5%
- IUSB vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 7.7%
Percentages are holdings overlap with the named fund.
Open FBND or IUSB 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.