ETF comparison
BIV vs IUSB
Both US Aggregate Bond.
Vanguard Intermediate-Term Bond Index Fund ETF Shares · iShares Core Universal USD Bond ETF
Holdings overlap
2,313 positions appear in both funds. Buying equal dollars of BIV and IUSB would leave roughly 15.4% 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
BIV is 3 bps cheaper than IUSB. On a $100,000 position that's about $30/yr more in fees for IUSB.
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 BIV vs IUSB.
Top shared holdings
2,313 shared in total| # | Holding | In BIV | In IUSB | Overlap |
|---|---|---|---|---|
| 1 | United States Treasury Note/Bond | 0.79% | 0.37% | 0.37% |
| 2 | United States Treasury Note/Bond | 2.14% | 0.36% | 0.36% |
| 3 | United States Treasury Note/Bond | 2.08% | 0.35% | 0.35% |
| 4 | United States Treasury Note/Bond | 2.04% | 0.34% | 0.34% |
| 5 | United States Treasury Note/Bond | 2.13% | 0.34% | 0.34% |
| 6 | United States Treasury Note/Bond | 2.08% | 0.34% | 0.34% |
| 7 | United States Treasury Note/Bond | 2.04% | 0.33% | 0.33% |
| 8 | United States Treasury Note/Bond | 2.14% | 0.33% | 0.33% |
| 9 | United States Treasury Note/Bond | 2.02% | 0.33% | 0.33% |
| 10 | United States Treasury Note/Bond | 1.56% | 0.33% | 0.33% |
| 11 | United States Treasury Note/Bond | 1.94% | 0.32% | 0.32% |
| 12 | United States Treasury Note/Bond | 2.10% | 0.29% | 0.29% |
Only in BIV
42 total- Corp Andina de Fomento 0.04%
- Broadcom Inc 0.04%
- European Investment Bank 0.04%
- Japan Bank for International Cooperation 0.03%
- Federal Home Loan Banks 0.03%
- BlackRock Funding Inc 0.03%
- BlackRock Funding Inc/DE 0.02%
- Tennessee Valley Authority 0.02%
- Nomura Holdings Inc 0.02%
- BlackRock Funding Inc/DE 0.01%
Only in IUSB
15,731 total- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.41%
- United States of America 0.37%
- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.31%
- United States of America 0.31%
- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.30%
- United States of America 0.30%
- United States of America 0.30%
- United States of America 0.29%
- United States of America 0.29%
- United States of America 0.29%
Related comparisons
More comparisons with BIV
- BIV vs EAGG · iShares ESG U.S. Aggregate Bond ETF 15.4%
- BIV vs VCRB · Vanguard Core Bond ETF 10.0%
- BIV vs AGGY · WisdomTree Yield Enhanced U.S. Aggregate Bond Fund 9.0%
- BIV vs CGCP · Capital Group Core Plus Income ETF 5.1%
- BIV vs JCPB · JPMorgan Core Plus Bond ETF 4.5%
- BIV vs BOND · PIMCO Active Bond Exchange-Traded Fund 2.8%
More comparisons with IUSB
- IUSB vs DFCF · Dimensional Core Fixed Income ETF 15.2%
- IUSB vs VCRB · Vanguard Core Bond ETF 14.6%
- IUSB vs FBND · Fidelity Total Bond ETF 14.4%
- IUSB vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 14.3%
- IUSB vs VGSH · Vanguard Short-Term Treasury Index Fund ETF Shares 12.5%
- IUSB vs SHY · iShares 1-3 Year Treasury Bond ETF 12.4%
Percentages are holdings overlap with the named fund.
Open BIV 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.