AGGUS aggregate bond
iShares Core U.S. Aggregate Bond ETF
13,390holdings
0.03%annual fee
USmarket
ValuationNot available for this holdings date
AGG holdings and fund profile
ETF comparisons / AGG vs ISTB
US aggregate bond comparison · Holdings dated 2026-08-27
AGG vs ISTB
iShares Core U.S. Aggregate Bond ETF compared with iShares Core 1-5 Year USD Bond ETF
Most company exposure is different between these funds.AGG has 9,400 companies outside the overlap; ISTB has 3,442.
ISTBbond
iShares Core 1-5 Year USD Bond ETF
7,434holdings
0.06%annual fee
USmarket
ValuationNot available for this holdings date
ISTB holdings and fund profile
Price development
Both lines rebased to 0% over their shared dates
Largest shared positions
3,984 companies held in both funds
AGG weight
ISTB weight
| Shared company | AGG | ISTB |
|---|---|---|
| BlackRock Funds III: BlackRock Cash Funds: Institutional; SL Agency Shares BISXX | 2.89% | 0.97% |
| United States Treasury TNOTE | 0.41% | 0.93% |
| United States Treasury T | 0.38% | 0.75% |
| United States Treasury T | 0.36% | 1.09% |
| United States Treasury T | 0.33% | 0.80% |
| TREASURY NOTE T | 0.32% | 0.46% |
| TREASURY NOTE T | 0.32% | 0.47% |
| United States Treasury Note/Bond T | 0.31% | 0.33% |
| United States Treasury T | 0.30% | 0.42% |
| United States Treasury T | 0.30% | 0.62% |
| TREASURY NOTE T | 0.30% | 0.42% |
| United States Treasury T | 0.29% | 0.77% |
| United States Treasury | 0.28% | 0.62% |
| United States Treasury T | 0.28% | 0.81% |
| United States Treasury T | 0.28% | 0.28% |
| United States Treasury T | 0.27% | 0.89% |
| United States Treasury T | 0.30% | 0.27% |
| US TREASURY N/B 4.125 06/30/2031 T | 0.27% | 1.06% |
| United States Treasury T | 0.27% | 0.84% |
| United States Treasury T | 0.26% | 0.82% |
| United States Treasury T | 0.25% | 0.58% |
| United States Treasury T | 0.25% | 0.32% |
| United States Treasury | 0.24% | 0.52% |
| United States Treasury T | 0.24% | 0.25% |
| United States Treasury T | 0.23% | 0.24% |
AGG and ISTB questions
Based on the holdings compared above
How much do AGG and ISTB overlap?
AGG and ISTB overlap by 36.7% by weight, across 3,984 shared companies.
Which companies do AGG and ISTB both hold?
The largest companies held in both funds are BlackRock Funds III: BlackRock Cash Funds: Institutional; SL Agency Shares, United States Treasury, United States Treasury, United States Treasury, United States Treasury.
Can I hold both AGG and ISTB?
Holding both means 36.7% of that part of your portfolio is the same companies counted twice. That can suit you or not depending on your goals; this tool reports the overlap rather than giving advice.
Is AGG or ISTB cheaper?
AGG has a 0.03% expense ratio and ISTB has 0.06%.
Compare your own portfolio
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