---
ticker: "IUSB"
name: "iShares Core Universal USD Bond ETF"
url: "https://etf.net/etf/IUSB"
grade: "A"
score: 85
graded_at: "2026-10-12"
category: "US Aggregate Bond"
category_rank: "4 of 117"
methodology: "https://etf.net/methodology"
---

# IUSB: iShares Core Universal USD Bond ETF

Grade **A**, Score 85 of 100. Rank 4 of 117 in US Aggregate Bond.

Graded Oct 12, 2026.

## Grade pillars

| Pillar | Score | Category rank |
| --- | --- | --- |
| Cost | 91 | 11 of 117 |
| Mission | 100 | 1 of 101 |
| Risk | 50 | 39 of 116 |
| Tradability | 89 | 4 of 117 |
| Holdings | 75 | 21 of 116 |
| Durability | 94 | 5 of 117 |

## Top holdings

The fund holds 18241 positions. These are the largest 30, by weight.

| # | Ticker | Name | Weight |
| --- | --- | --- | --- |
| 1 | — | BLK Liquidity Temp Cash Inst #21 | 5.22% |
| 2 | — | Treasury Note 4.63% 02/15/2035 | 0.50% |
| 3 | — | Treasury Note 4.00% 11/15/2035 | 0.42% |
| 4 | — | Treasury Note 4.25% 08/15/2035 | 0.41% |
| 5 | — | Treasury Note 1.88% 02/15/2032 | 0.39% |
| 6 | — | Treasury Note 4.13% 05/31/2031 | 0.38% |
| 7 | — | Treasury Note (2OLD) 4.13% 02/15/2036 | 0.36% |
| 8 | — | Umbs 15YR Tba(Reg B) 2.00% 11/17/2026 | 0.36% |
| 9 | — | Umbs 30YR Tba(Reg A) 5.50% 11/12/2026 | 0.34% |
| 10 | — | Treasury Note (Old) 4.13% 08/31/2028 | 0.34% |
| 11 | — | Treasury Note 1.25% 09/30/2028 | 0.33% |
| 12 | — | Treasury Note 4.25% 05/15/2035 | 0.33% |
| 13 | — | Treasury Note (Old) 4.38% 05/15/2036 | 0.33% |
| 14 | — | Treasury Note 4.88% 10/31/2028 | 0.33% |
| 15 | — | Treasury Note 4.38% 12/31/2029 | 0.33% |
| 16 | — | Treasury Note 4.63% 09/30/2028 | 0.33% |
| 17 | — | Treasury Note 4.25% 11/15/2034 | 0.33% |
| 18 | — | Treasury Note 4.13% 06/30/2031 | 0.32% |
| 19 | — | Treasury Note 4.00% 07/31/2029 | 0.32% |
| 20 | — | Treasury Note 3.88% 08/15/2034 | 0.32% |
| 21 | — | Treasury Note 1.38% 11/15/2031 | 0.32% |
| 22 | — | Umbs 30YR Tba(Reg A) 2.00% 11/12/2026 | 0.31% |
| 23 | — | Treasury Note 4.00% 02/15/2034 | 0.31% |
| 24 | — | Treasury Note 4.38% 05/15/2034 | 0.31% |
| 25 | — | Treasury Note 3.50% 09/30/2029 | 0.30% |
| 26 | — | Treasury Note 2.75% 08/15/2032 | 0.28% |
| 27 | — | Treasury Note 4.63% 04/30/2029 | 0.28% |
| 28 | — | Treasury Note 3.50% 10/15/2028 | 0.28% |
| 29 | — | Umbs 30YR Tba(Reg A) 2.50% 11/12/2026 | 0.28% |
| 30 | — | Treasury Note 3.38% 09/15/2028 | 0.28% |

Source: etf.net, https://etf.net/etf/IUSB. Please cite the page URL.