ETF comparison
IUSB vs VCRB
Both US Aggregate Bond.
iShares Core Universal USD Bond ETF · Vanguard Core Bond ETF
Holdings overlap
1,960 positions appear in both funds. Buying equal dollars of IUSB and VCRB 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
IUSB is 4 bps cheaper than VCRB. On a $100,000 position that's about $40/yr more in fees for VCRB.
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 IUSB vs VCRB.
Top shared holdings
1,960 shared in total| # | Holding | In IUSB | In VCRB | Overlap |
|---|---|---|---|---|
| 1 | United States of America | 0.37% | 0.55% | 0.37% |
| 2 | United States of America | 0.35% | 0.52% | 0.35% |
| 3 | United States of America | 0.34% | 0.51% | 0.34% |
| 4 | United States of America | 0.33% | 0.41% | 0.33% |
| 5 | United States of America | 0.29% | 0.35% | 0.29% |
| 6 | United States of America | 0.26% | 0.43% | 0.26% |
| 7 | United States of America | 0.22% | 0.54% | 0.22% |
| 8 | United States of America | 0.22% | 0.34% | 0.22% |
| 9 | United States of America | 0.19% | 0.53% | 0.19% |
| 10 | United States of America | 0.18% | 0.27% | 0.18% |
| 11 | United States of America | 0.18% | 0.65% | 0.18% |
| 12 | United States of America | 0.17% | 1.02% | 0.17% |
Only in IUSB
16,084 total- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.41%
- United States of America 0.37%
- United States of America 0.36%
- United States of America 0.34%
- United States of America 0.34%
- United States of America 0.33%
- United States of America 0.33%
- United States of America 0.33%
- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.31%
- United States of America 0.31%
Only in VCRB
1,454 total- Fannie Mae or Freddie Mac 2.33%
- Fannie Mae or Freddie Mac 0.68%
- Kreditanstalt fuer Wiederaufbau 0.60%
- Fannie Mae REMICS 0.59%
- OBX 2026-INV2 Trust 0.57%
- Ginnie Mae II Pool 0.56%
- Finland Government International Bond 0.54%
- Fannie Mae or Freddie Mac 0.54%
- OBX 2026-INV4 Trust 0.47%
- Canada Government International Bond 0.38%
Related comparisons
More comparisons with IUSB
- 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%
- IUSB vs MBB · iShares MBS ETF 9.0%
- IUSB vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 7.5%
More comparisons with VCRB
- VCRB vs EAGG · iShares ESG U.S. Aggregate Bond ETF 13.1%
- VCRB vs BLV · Vanguard Long-Term Bond Index Fund ETF Shares 12.1%
- VCRB vs GVI · iShares Intermediate Government/Credit Bond ETF 10.4%
- VCRB vs BIV · Vanguard Intermediate-Term Bond Index Fund ETF Shares 10.0%
- VCRB vs FBND · Fidelity Total Bond ETF 8.3%
- VCRB vs GOVT · iShares U.S. Treasury Bond ETF 7.7%
Percentages are holdings overlap with the named fund.
Open IUSB or VCRB 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.