iShares Core Universal USD Bond ETF
iShares Trust · 1 share class
Fund classification
Classified from what the fund holds · as of 2026 Q2
iShares Core Universal USD Bond ETF is a U.S. bond index ETF that tracks the Bloomberg U.S. Universal Index.
- Asset class
- Bonds
- Region
- United States
- Management
- Index (passive)
- Fund type
- ETF
- Credit quality
- Investment grade
- Rate sensitivity
- Intermediate duration
Fund profile
As filed in the prospectus · 2026 Q1
The iShares Core Universal USD Bond ETF (the Fund ) seeks to track the investment results of an index composed of U.S. dollar-denominated bonds that are rated either investment-grade or high yield.
The fund tracks the Bloomberg U.S. Universal Index using representative sampling, holding a sample of U.S. dollar-denominated investment-grade and high-yield bonds across Treasuries, government-related debt, corporate bonds, mortgage-backed securities, asset-backed securities, and emerging market bonds. Because the fund does not hold all index constituents, its returns may diverge from the index it seeks to track.
| Share class | Expense ratio |
|---|---|
| IUSB | 0.06% |
Portfolio turnover 65.00% · as of 2026 Q1
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| Bonds | 76.84% |
| Securitized | 21.60% |
| Cash & short-term | 3.82% |
Sector allocation
The same holdings as Allocation above, grouped by market sector instead of asset type · as of 2026 Q2
| Government | 44.8% |
| Securitized | 21.2% |
| Other | 6.5% |
| International | 6.1% |
| 12 smaller | 21.5% |
Government, Securitized and Cash are non-corporate buckets; International is foreign holdings we don’t sector-classify, and Other is the residual (held funds, unresolved names).
Latest quarter
What changed since the fund's previous filing
Largest new: United States of America ×4, Federal National Mortgage Association or Federal Home Loan Mortgage Corp. ×3, Government National Mortgage Association
Largest exited: United States of America ×6, Government National Mortgage Association, Federal National Mortgage Association or Federal Home Loan Mortgage Corp.
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-04-30
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 | 94.2% |
| Floating rate | 5.8% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 1.0% |
| 1-3y | 21.1% |
| 3-5y | 18.9% |
| 5-10y | 20.0% |
| 10y+ | 38.9% |
These three overlap — one holding can be in arrears and paying in kind at once — so they are shown separately and never summed.
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 | 62% |
| Credit spreads | 38% |
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 | +3.15 yr |
| High yield | +0.24 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 | 2.17 yr | 39% |
| 10 yr | 1.52 yr | 28% |
| 30 yr | 1.38 yr | 25% |
| 3 mo | 0.01 yr | 0% |
| 1 yr | 0.12 yr | 4% |
| 5 yr | 1.62 yr | 48% |
| 10 yr | 0.78 yr | 23% |
| 30 yr | 0.87 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 | +0.01 | +0.00 | $18.6k | $2.0k |
| 1 yr | +0.44 | +0.10 | +0.02 | $375.5k | $74.5k |
| 5 yr | +2.17 | +1.47 | +0.15 | $5.36m | $541.7k |
| 10 yr | +1.52 | +0.74 | +0.03 | $2.72m | $127.7k |
| 30 yr | +1.38 | +0.83 | +0.04 | $3.05m | $138.3k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
Duration contribution in years, summing to the fund's 5.50 yr.
This is where the fund's rate exposure sits, not its currency risk — most international bond funds hedge the currency back to dollars, and the size of those hedges is not in the filing. Tenors are also summed across curves, so a 5-year JPY point and a 5-year USD point are added together.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Value | Shares |
|---|---|---|---|---|
| — | Blackrock Liquidity Tempcash | 2.88% | $1.05B | — |
| — | BlackRock Funds III | 0.93% | $341.25M | — |
| — | United States of America4.25% · due 2034-11-15 | 0.37% | $135.63M | — |
| — | United States of America4.38% · due 2034-05-15 | 0.37% | $133.98M | — |
| — | United States of America3.88% · due 2034-08-15 | 0.37% | $133.74M | — |
| — | United States of America4.00% · due 2030-02-28 | 0.37% | $133.77M | — |
| — | United States of America4.25% · due 2035-05-15 | 0.36% | $131.36M | — |
| — | United States of America4.00% · due 2034-02-15 | 0.36% | $131.29M | — |
| — | United States of America4.63% · due 2035-02-15 | 0.36% | $130.26M | — |
| — | United States of America4.50% · due 2033-11-15 | 0.35% | $126.35M | — |
Top 10 positions are 6.71% of net assets, top 25 11.41%, across 3.5K issuers.
See more of this fund's book
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