iShares Core U.S. Aggregate Bond ETF
U.S. bond index ETF · tracks Bloomberg U.S. Aggregate Bond Index
As of its 2026 Q2 report, iShares Core U.S. Aggregate Bond ETF held 13,267 positions with $136.46B in net assets. Its ten largest holdings made up 7.0% of the fund. The AGG share class costs 0.03% a year. Over the 12 months to May 2026, AGG returned 5.1%, with dividends reinvested. In 2026 Q2 it added 527 new positions and exited 444.
The iShares Core U.S. Aggregate Bond ETF (the Fund ) seeks to track the investment results of an index composed of the total U.S. investment-grade bond market.
The fund tracks the Bloomberg U.S. Aggregate Bond Index using representative sampling, holding a sample of investment-grade U.S. Treasury, agency mortgage-backed, corporate, and asset-backed securities that collectively mirror the index's characteristics rather than holding all constituents. Because the fund samples the index rather than replicating it fully, its returns may diverge from the index. The fund may enter into to-be-announced mortgage contracts on a regular basis, pending settlement of which it holds cash and short-term instruments.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES | 3.40% | $4.64B | — |
United States Treasury 4.63% · due 2035-02-15 | 0.42% | $573.10M | — |
United States Treasury 4.25% · due 2034-11-15 | 0.41% | $563.67M | — |
United States Treasury 4.00% · due 2030-02-28 | 0.41% | $557.76M | — |
United States Treasury 3.88% · due 2034-08-15 | 0.40% | $550.26M | — |
United States Treasury 4.50% · due 2033-11-15 | 0.40% | $544.94M | — |
United States Treasury 4.25% · due 2035-05-15 | 0.39% | $535.04M | — |
United States Treasury 4.25% · due 2035-08-15 | 0.39% | $533.32M | — |
United States Treasury 4.00% · due 2034-02-15 | 0.39% | $526.99M | — |
United States Treasury 4.00% · due 2035-11-15 | 0.39% | $525.67M | — |
The 200 largest of 13,267 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Bonds | 73.43% |
| Securitized | 25.05% |
| Cash & short-term | 3.40% |
By sector
- Government
- 47.7%
- Securitized
- 24.6%
- Financials
- 5.1%
- Other
- 3.9%
- 12 other sectors
- 18.8%
- Government
- 47.7%
- Securitized
- 24.6%
- Financials
- 5.1%
- Other
- 3.9%
- Cash
- 3.3%
- International
- 2.6%
- Utilities
- 2.6%
- Health Care
- 2.0%
- Information Technology
- 1.7%
- Industrials
- 1.5%
- Communication Services
- 1.5%
- Consumer Staples
- 1.1%
- Consumer Discretionary
- 0.8%
- Energy
- 0.7%
- Real Estate
- 0.6%
- Materials
- 0.4%
How it has done
AGG share class · total returns with dividends reinvested
Volatility over the last 12 months: 3.22%. Past returns are a record, not a forecast.
Fees & fund details
iShares Core U.S. Aggregate Bond ETF is a U.S. bond index ETF that tracks the Bloomberg U.S. Aggregate Bond Index.
- Asset class
- Bonds
- Region
- United States
- Management
- Index (passive)
- Fund type
- ETF
- Credit quality
- Investment grade
- Rate sensitivity
- Intermediate duration
- Features
- Master-feeder
- Expense ratio, by class
- 0.03%· AGG 0.03%
- Portfolio turnover
- 62.00% a year · as of 2026 Q2
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
527 new· the largest 2
444 exited· the largest 2
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-05-31
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 99.4% |
| Floating rate | 0.6% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 1.1% |
| 1-3y | 20.7% |
| 3-5y | 17.2% |
| 5-10y | 18.6% |
| 10y+ | 42.4% |
Based on what filers reported; a filer that never reported a flag also reads as none.
Risk profile
Interest-rate and credit-spread sensitivity, both in years · as of 2026Q2
Most of this fund’s sensitivity is to interest rates, with credit spreads carrying about half as much.
Where the loss would come from. The two shocks are the same size, so this is the balance of the fund's two sensitivities rather than a bet on one moving more.
| Interest rates | 64% |
| Credit spreads | 36% |
Filers report the impact of a 0.01% move only, so the total is our own scaling of that one number and overstates the loss on most bonds — read it as approximate, never as precise. The two sensitivities overlap rather than add up: they measure the same positions against different shocks, which is why the durations above are shown side by side and never summed.
Share of the fund's spread duration carried by each credit tier.
| Investment grade | +3.21 yr |
| High yield | +0.01 yr |
Share of duration at each point, shortest first. A positive figure loses value when spreads widen; a negative one offsets — a credit hedge.
| 3 mo | 0.01 yr | 0% |
| 1 yr | 0.44 yr | 8% |
| 5 yr | 2.21 yr | 38% |
| 10 yr | 1.65 yr | 28% |
| 30 yr | 1.50 yr | 26% |
| 3 mo | 0.01 yr | 0% |
| 1 yr | 0.09 yr | 3% |
| 5 yr | 1.52 yr | 47% |
| 10 yr | 0.78 yr | 24% |
| 30 yr | 0.83 yr | 26% |
The two bands measure the same positions against different shocks and do not add — a Treasury carries rate duration and no spread duration, a floating-rate credit the reverse. Rate tenors are also summed across every currency the fund discloses.
Show the numbers
| Tenor | Rate yrs | IG yrs | HY yrs | IG $/bp | HY $/bp |
|---|---|---|---|---|---|
| 3 mo | +0.01 | +0.00 | +0.01 | $2.4k | $82.2k |
| 1 yr | +0.44 | +0.09 | +0.00 | $1.17m | $0 |
| 5 yr | +2.21 | +1.52 | +0.00 | $20.76m | $492 |
| 10 yr | +1.65 | +0.78 | +0.00 | $10.59m | $0 |
| 30 yr | +1.50 | +0.83 | +0.00 | $11.29m | $0 |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
Understand how this fund fits with the rest.
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