iShares Core U.S. Aggregate Bond ETF
iShares Trust · Series S000004362 · 1 share classes
data updated 2026-09-08
Fund profile
As filed in the prospectus · 2026 Q2
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.
| Share class | Expense ratio |
|---|---|
| AGG | 0.03% |
Portfolio turnover 62.00% · as of 2026 Q2
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| Bonds | 73.43% |
| Securitized | 25.05% |
| Cash & short-term | 3.40% |
Latest quarter
What changed since the fund's previous filing
Largest new: United States Treasury ×6, UMBS, TBA ×2
Largest exited: United States Treasury ×5, UMBS, TBA ×3
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
May 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
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.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Value | Shares |
|---|---|---|---|---|
| — | BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES | 3.40% | $4.64B | — |
| — | United States Treasury4.63% · due 2035-02-15 | 0.42% | $573.10M | — |
| — | United States Treasury4.25% · due 2034-11-15 | 0.41% | $563.67M | — |
| — | United States Treasury4.00% · due 2030-02-28 | 0.41% | $557.76M | — |
| — | United States Treasury3.88% · due 2034-08-15 | 0.40% | $550.26M | — |
| — | United States Treasury4.50% · due 2033-11-15 | 0.40% | $544.94M | — |
| — | United States Treasury4.25% · due 2035-05-15 | 0.39% | $535.04M | — |
| — | United States Treasury4.25% · due 2035-08-15 | 0.39% | $533.32M | — |
| — | United States Treasury4.00% · due 2034-02-15 | 0.39% | $526.99M | — |
| — | United States Treasury4.00% · due 2035-11-15 | 0.39% | $525.67M | — |
Top 10 positions are 7.00% of net assets, top 25 11.89%, across 1.4K issuers.
See more of this fund's book
More positions with filed share counts, and the quarter-over-quarter change list rather than the largest few — free with an account, no card required.
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