ETF comparison
IUSB vs SHY
US Aggregate Bond vs US Treasury (Short).
iShares Core Universal USD Bond ETF · iShares 1-3 Year Treasury Bond ETF
Holdings overlap
89 positions appear in both funds. Buying equal dollars of IUSB and SHY would leave roughly 13.9% 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 9 bps cheaper than SHY. On a $100,000 position that's about $90/yr more in fees for SHY.
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 SHY.
Top shared holdings
89 shared in total| # | Holding | In IUSB | In SHY | Overlap |
|---|---|---|---|---|
| 1 | United States of America | 0.30% | 1.23% | 0.30% |
| 2 | United States of America | 0.30% | 1.34% | 0.30% |
| 3 | United States of America | 0.29% | 1.21% | 0.29% |
| 4 | United States of America | 0.29% | 0.71% | 0.29% |
| 5 | United States of America | 0.27% | 1.27% | 0.27% |
| 6 | United States of America | 0.27% | 0.41% | 0.27% |
| 7 | United States of America | 0.24% | 1.26% | 0.24% |
| 8 | United States of America | 0.23% | 1.61% | 0.23% |
| 9 | United States of America | 0.23% | 0.89% | 0.23% |
| 10 | United States of America | 0.23% | 1.07% | 0.23% |
| 11 | United States of America | 0.23% | 1.30% | 0.23% |
| 12 | United States of America | 0.23% | 1.71% | 0.23% |
Only in IUSB
17,955 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 SHY
1 total- United States of America 0.76%
Related comparisons
More comparisons with IUSB
- IUSB vs MBB · iShares MBS ETF 9.5%
- IUSB vs VGLT · Vanguard Long-Term Treasury Index Fund ETF Shares 7.7%
- IUSB vs JCPB · JPMorgan Core Plus Bond ETF 7.6%
- IUSB vs CGCP · Capital Group Core Plus Income ETF 7.3%
- IUSB vs NEAR · iShares Short Duration Bond Active ETF 4.8%
- IUSB vs VMBS · Vanguard Mortgage-Backed Securities Index Fund ETF Shares 4.7%
More comparisons with SHY
- SHY vs NEAR · iShares Short Duration Bond Active ETF 8.1%
- SHY vs CGCP · Capital Group Core Plus Income ETF 5.1%
- SHY vs DFCF · Dimensional Core Fixed Income ETF 4.4%
- SHY vs VCRB · Vanguard Core Bond ETF 2.6%
- SHY vs SCHR · Schwab Intermediate-Term U.S. Treasury ETF 1.9%
- SHY vs SPTI · State Street SPDR Portfolio Intermediate Term Treasury Index ETF 1.5%
Percentages are holdings overlap with the named fund.
Open IUSB or SHY 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.