ETF comparison
IUSB vs VGLT
US Aggregate Bond vs US Treasury (Long).
iShares Core Universal USD Bond ETF · Vanguard Long-Term Treasury Index Fund ETF Shares
Holdings overlap
95 positions appear in both funds. Buying equal dollars of IUSB and VGLT would leave roughly 7.5% 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
VGLT 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 IUSB vs VGLT.
Top shared holdings
95 shared in total| # | Holding | In IUSB | In VGLT | Overlap |
|---|---|---|---|---|
| 1 | United States of America | 0.17% | 1.64% | 0.17% |
| 2 | United States of America | 0.17% | 2.21% | 0.17% |
| 3 | United States of America | 0.16% | 2.14% | 0.16% |
| 4 | United States of America | 0.16% | 2.21% | 0.16% |
| 5 | United States of America | 0.16% | 2.22% | 0.16% |
| 6 | United States of America | 0.16% | 1.54% | 0.16% |
| 7 | United States of America | 0.16% | 1.41% | 0.16% |
| 8 | United States of America | 0.16% | 1.50% | 0.16% |
| 9 | United States of America | 0.16% | 2.17% | 0.16% |
| 10 | United States of America | 0.15% | 2.13% | 0.15% |
| 11 | United States of America | 0.15% | 1.35% | 0.15% |
| 12 | United States of America | 0.15% | 2.17% | 0.15% |
Only in IUSB
17,949 total- Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.41%
- United States of America 0.37%
- United States of America 0.37%
- United States of America 0.36%
- United States of America 0.35%
- United States of America 0.34%
- United States of America 0.34%
- United States of America 0.34%
- United States of America 0.33%
- United States of America 0.33%
Only in VGLT
2 total- United States Treasury Note/Bond 0.36%
- United States Treasury Note/Bond 0.12%
Related comparisons
More comparisons with IUSB
- IUSB vs CGCP · Capital Group Core Plus Income ETF 7.3%
- IUSB vs JCPB · JPMorgan Core Plus Bond ETF 7.2%
- IUSB vs VMBS · Vanguard Mortgage-Backed Securities Index Fund ETF Shares 4.7%
- IUSB vs NEAR · iShares Short Duration Bond Active ETF 4.1%
- IUSB vs TLT · iShares 20+ Year Treasury Bond ETF 4.1%
- IUSB vs BINC · iShares Flexible Income Active ETF 3.7%
More comparisons with VGLT
- VGLT vs VCRB · Vanguard Core Bond ETF 7.1%
- VGLT vs BOND · PIMCO Active Bond Exchange-Traded Fund 5.6%
- VGLT vs JCPB · JPMorgan Core Plus Bond ETF 5.1%
- VGLT vs CORP · PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund 4.0%
- VGLT vs CGCP · Capital Group Core Plus Income ETF 3.9%
- VGLT vs DFCF · Dimensional Core Fixed Income ETF 3.2%
Percentages are holdings overlap with the named fund.
Open IUSB or VGLT 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.