Overview
The Agg plus a measured slice of high yield — around 18,000 bonds covering the entire taxable US dollar bond market in one fund.
Top Holdings
| Ticker | Holding | Weight |
|---|---|---|
| UST | US Treasuries | 42.1% |
| MBS | Agency Mortgage-Backed | 24.3% |
| IG | IG Corporate bonds | 24.8% |
| HY | High Yield Corporates | 5.2% |
| EM | EM USD Sovereign debt | 1.8% |
| ABS | Asset-Backed / CMBS | 1.4% |
| -- | Cash & Other | 0.4% |
Fund Details
Investment Thesis
IUSB fixes the Agg's blind spot: the standard index excludes high yield entirely, leaving out a fifth of the real bond market. By tracking the broader Universal index, IUSB adds a controlled ~5% junk sleeve that has historically nudged returns up with minimal extra drawdown — which is why it has quietly become BlackRock's $44B default bond recommendation. One ticket, whole taxable bond market, monthly income near 4.7%.
Who It's For
Set-and-forget investors who want their single bond fund to own everything — including the high-yield slice the Agg pretends doesn't exist. The upgrade pick over AGG/SCHZ for a total-market purist.
10-Year History
| Year | Close | % Chg |
|---|---|---|
| 2016 | $46.63 | -- |
| 2017 | $47.33 | +1.5% |
| 2018 | $46.38 | -2.0% |
| 2019 | $49.40 | +6.5% |
| 2020 | $51.62 | +4.5% |
| 2021 | $50.59 | -2.0% |
| 2022 | $43.50 | -14.0% |
| 2023 | $44.59 | +2.5% |
| 2024 | $44.37 | -0.5% |
| 2025 | $45.70 | +3.0% |
| Year | Yield |
|---|---|
| 2016 | 2.50% |
| 2017 | 2.50% |
| 2018 | 3.00% |
| 2019 | 2.80% |
| 2020 | 2.20% |
| 2021 | 2.00% |
| 2022 | 3.30% |
| 2023 | 4.30% |
| 2024 | 4.60% |
| 2025 | 4.70% |
| Year | AUM | % Chg |
|---|---|---|
| 2016 | $1.5B | -- |
| 2017 | $2.5B | +66.7% |
| 2018 | $3.5B | +40.0% |
| 2019 | $5B | +42.9% |
| 2020 | $7B | +40.0% |
| 2021 | $12B | +71.4% |
| 2022 | $15B | +25.0% |
| 2023 | $20B | +33.3% |
| 2024 | $30B | +50.0% |
| 2025 | $40B | +33.3% |
Price history from exchange data. Dividend yields from reported distributions; some earlier years are derived from total-return vs price-return data or are ETFHub estimates. AUM history is an ETFHub estimate modelled from current assets and annual returns (fund flows not reflected) and may differ from official fund records. Data as of October 2026.
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