iShares Core Total USD Bond Market ETF
Price through Oct 26, 2026 · Flows through Oct 23, 2026. Figures use the latest available records, not a live quote. Fund details retrieved Oct 26, 2026. Holdings snapshot retrieved Oct 26, 2026.
The fund will invest at least 80% of its assets in the component securities of the underlying index and to-be-announced transactions (“TBAs”) that have economic characteristics that are substantially identical to the economic characteristics of the component securities of the underlying index. The index measures the performance of U.S. dollar-denominated taxable bonds that are rated either investment-grade or high yield.
IUSB price
Table
| Date | IUSB close |
|---|---|
| Sep 28, 2026 | $44.17 |
| Sep 29, 2026 | $44.14 |
| Sep 30, 2026 | $44.09 |
| Oct 1, 2026 | $44.03 |
| Oct 2, 2026 | $43.95 |
| Oct 5, 2026 | $43.92 |
| Oct 6, 2026 | $44.03 |
| Oct 7, 2026 | $44.02 |
| Oct 8, 2026 | $44.14 |
| Oct 9, 2026 | $44.14 |
| Oct 12, 2026 | $44.15 |
| Oct 13, 2026 | $44.19 |
| Oct 14, 2026 | $44.24 |
| Oct 15, 2026 | $44.47 |
| Oct 16, 2026 | $44.47 |
| Oct 19, 2026 | $44.33 |
| Oct 20, 2026 | $44.42 |
| Oct 21, 2026 | $44.43 |
| Oct 22, 2026 | $44.77 |
| Oct 23, 2026 | $44.70 |
| Oct 26, 2026 | $44.77 |
Daily net flows, 1M
Net inflow over the range: +$5.7B
- Inflow / above zero
- Outflow / below zero
Show as table
| Label | Value ($) |
|---|---|
| Sep 23 | $2.9B |
| Sep 24 | $1.1B |
| Sep 25 | $220M |
| Sep 28 | $118.8M |
| Sep 29 | $105.6M |
| Sep 30 | $338.8M |
| Oct 1 | $101.2M |
| Oct 2 | $101.2M |
| Oct 5 | $45.7M |
| Oct 6 | $51.1M |
| Oct 7 | −$264 |
| Oct 8 | $110M |
| Oct 9 | $110M |
| Oct 12 | $127.6M |
| Oct 13 | $44 |
| Oct 14 | $44M |
| Oct 15 | $63M |
| Oct 16 | −$44 |
| Oct 19 | $96.8M |
| Oct 20 | −$88 |
| Oct 21 | −$220 |
| Oct 22 | $18M |
| Oct 23 | −$630 |
Money keeps arriving — +$1.4B of net inflows over the past month, about 2.9% of the fund's asset base, while the price has returned -3.8% so far this year. At 0.060% a year it is not the cheapest way in — AGG has a reported fee of 0.03%.
COMPOSED FROM THE FUND’S OWN DAILY RECORDS · UPDATED WITH EACH REFRESH
CELL SIZE IS PORTFOLIO WEIGHT · COLOR IS THE CHANGE IN THE LATEST AVAILABLE SNAPSHOT · TOP 40 POSITIONS
| # | Holding | Weight | Price | Day | 52-wk | |
|---|---|---|---|---|---|---|
| 1 | —TREASURY NOTE | 0.37% | — | — | — | |
| 2 | —TREASURY NOTE (OLD) | 0.37% | — | — | — | |
| 3 | —TREASURY NOTE | 0.36% | — | — | — | |
| 4 | —TREASURY NOTE | 0.36% | — | — | — | |
| 5 | —TREASURY NOTE | 0.36% | — | — | — | |
| 6 | —TREASURY NOTE | 0.36% | — | — | — | |
| 7 | —TREASURY NOTE | 0.36% | — | — | — | |
| 8 | —TREASURY NOTE (2OLD) | 0.35% | — | — | — | |
| 9 | —TREASURY NOTE | 0.35% | — | — | — | |
| 10 | —TREASURY NOTE | 0.35% | — | — | — | |
| 11 | —TREASURY NOTE | 0.34% | — | — | — | |
| 12 | —TREASURY NOTE | 0.33% | — | — | — | |
| 13 | —TREASURY NOTE (OLD) | 0.33% | — | — | — | |
| 14 | —TREASURY NOTE | 0.32% | — | — | — | |
| 15 | —TREASURY NOTE | 0.32% | — | — | — |
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- Treasury39.58%
- MBS Pass-Through19.35%
- Industrial4.39%
- Financial Institutions4.13%
- Sovereign2.6%
- CMBS1.07%
- Supranational1%
- Agency0.93%
- Cash and/or Derivatives0.78%
- Local Authority0.27%
Show as table
| Item | Value (%) |
|---|---|
| Treasury | 39.58% |
| MBS Pass-Through | 19.35% |
| Industrial | 4.39% |
| Financial Institutions | 4.13% |
| Sovereign | 2.6% |
| CMBS | 1.07% |
| Supranational | 1% |
| Agency | 0.93% |
| Cash and/or Derivatives | 0.78% |
| Local Authority | 0.27% |
Country weights
- United States68.34%
- Supranational1%
- United Kingdom0.48%
- Saudi Arabia0.48%
- Mexico0.44%
- Canada0.33%
- Turkey0.28%
- Argentina0.24%
Show as table
| Item | Value (%) |
|---|---|
| United States | 68.34% |
| Supranational | 1% |
| United Kingdom | 0.48% |
| Saudi Arabia | 0.48% |
| Mexico | 0.44% |
| Canada | 0.33% |
| Turkey | 0.28% |
| Argentina | 0.24% |
| 1 week | +0.8% |
| 1 month | +0.8% |
| 3 months | -1.5% |
| 6 months | -3.5% |
| YTD | -3.8% |
| 1 year | — |
| 3 years | — |
PRICE RETURN, DISTRIBUTIONS NOT REINVESTED
| 1 week | +$18M |
| 1 month | +$1.4B |
| 3 months | +$7.5B |
| YTD | +$16.8B |
| 1 year | +$18.2B |
CREATION/REDEMPTION DOLLARS, DAILY RECORDS
Monthly net flows
- Inflow / above zero
- Outflow / below zero
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| Label | Value ($) |
|---|---|
| Oct | $141M |
| Nov | $545.2M |
| Dec | $785M |
| Jan | $546.9M |
| Feb | $718M |
| Mar | $695.5M |
| Apr | $416.1M |
| May | $717.6M |
| Jul | $6.4B |
| Aug | $761M |
| Sep | $5.7B |
| Oct | $868.6M |
The top holding is 0.4% of the book; the top ten carry 4%. Spread across 250+ names, it behaves like roughly 210 equally-weighted positions.
VOLATILITY & DRAWDOWN FROM THE DAILY TAPE · CONCENTRATION FROM THE LATEST DISCLOSED BOOK
Due diligence cuts both ways. These funds sit on the same shelf and beat IUSB on at least one dimension that matters — the fee, the asset base, or where the money is going.
| Fund | Fee | Assets | Flow, 1M | The case | |
|---|---|---|---|---|---|
| STIP iShares 0-5 Year TIPS Bond ETF | 0.03% | $16.4B | +$489M | -3bp on fee · +$489M in over the month | Head-to-head |
| IJH iShares Core S&P Mid-Cap ETF | 0.05% | $123.5B | +$2.3B | -1bp on fee · 2× the assets · +$2.3B in over the month | Head-to-head |
| SPTS State Street SPDR Portfolio Short Term Treasury ETF | 0.03% | $7.1B | +$1.4B | -3bp on fee · +$1.4B in over the month | Head-to-head |
| IGSB iShares 1-5 Year Investment Grade Corporate Bond ETF | 0.04% | $23.7B | +$51M | -2bp on fee · +$51M in over the month | Head-to-head |
| IGIB iShares 5-10 Year Investment Grade Corporate Bond ETF | 0.04% | $18.6B | +$412M | -2bp on fee · +$412M in over the month | Head-to-head |