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Friday, October 2, 2026The Morning Brief →Sign in
IUSBISharesINDEX

iShares Core Total USD Bond Market ETF

$44.03-0.14% vs prior close
444752-WK

Price through Sep 30 · Flows through Sep 29. Figures use the latest available records, not a live quote. Fund details retrieved Oct 1. Holdings snapshot retrieved Oct 1.

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.

Price & daily flows
46.045.344.644.03DAILY NET FLOWMar 30May 29Jul 30Oct 1

SOURCE: MARKET TAPE & DAILY CREATION/REDEMPTION RECORDS · 6M SHOWN · NET +$13.7B OVER THIS RANGE

The desk’s read

Money keeps arriving — +$5.4B of net inflows over the past month, about 11.2% of the fund's asset base, while the price has returned -5.4% so far this year. At 0.060% a year, no lower reported fee appears among the alternatives shown here.

COMPOSED FROM THE FUND’S OWN DAILY RECORDS · UPDATED WITH EACH REFRESH

$47.8Bassets under management
0.060%expense ratio · $6 per $10,000 a year
+$5.4Bnet flow, trailing month
11.5Mavg daily volume, 30 days
16170holdings · US-domiciled
2014listed June 9, 2014 · beta 0.12
The book at a glance
—0.4%—0.4%—0.4%—0.4%—0.4%—0.4%—0.4%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.3%—0.2%—0.2%—0.2%

CELL SIZE IS PORTFOLIO WEIGHT · COLOR IS THE CHANGE IN THE LATEST AVAILABLE SNAPSHOT · TOP 40 POSITIONS

HoldingsDownload CSV
#HoldingWeightPriceDay52-wk
1—TREASURY NOTE0.37%———
2—TREASURY NOTE (OLD)0.37%———
3—TREASURY NOTE0.36%———
4—TREASURY NOTE0.36%———
5—TREASURY NOTE0.36%———
6—TREASURY NOTE0.36%———
7—TREASURY NOTE0.36%———
8—TREASURY NOTE (2OLD)0.35%———
9—TREASURY NOTE0.35%———
10—TREASURY NOTE0.35%———
11—TREASURY NOTE0.34%———
12—TREASURY NOTE0.33%———
13—TREASURY NOTE (OLD)0.33%———
14—TREASURY NOTE0.32%———
15—TREASURY NOTE0.32%———

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Sector weights
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%
PORTFOLIO COMPOSITION, LATEST DISCLOSURE
Country weights
United States68.34%
Supranational1%
United Kingdom0.48%
Saudi Arabia0.48%
Mexico0.44%
Canada0.33%
Turkey0.28%
Argentina0.24%
PORTFOLIO COMPOSITION, LATEST DISCLOSURE
Performance
1 week-0.8%
1 month-2.5%
3 months-4.1%
6 months-4.5%
YTD-5.4%
1 year-5.6%
3 years—

PRICE RETURN, DISTRIBUTIONS NOT REINVESTED

Net flows
1 week+$491M
1 month+$5.4B
3 months+$12.6B
YTD+$15.7B
1 year+$17.1B

CREATION/REDEMPTION DOLLARS, DAILY RECORDS

Monthly net flows
SepOctNovDecJanFebMarAprMayJulAugSep
DAILY CREATION/REDEMPTION RECORDS, TRAILING TWELVE MONTHS
The risk read
5%realized volatility, 30 days (annualized)
4%realized volatility, 1 year
-6.7%deepest fall from a peak, 1 year
-6.7%latest close versus that peak

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

Options tape
—calls · latest snapshot
1puts · latest snapshot
—put/call ratio
9.2Mshares traded
The case against IUSB

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.

FundFeeAssetsFlow, 1MThe case
STIP iShares 0-5 Year TIPS Bond ETF0.03%$16.3B+$489M-3bp on fee · +$489M in over the monthHead-to-head
IJH iShares Core S&P Mid-Cap ETF0.05%$122.8B+$2.3B-1bp on fee · 3× the assets · +$2.3B in over the monthHead-to-head
IGSB iShares 1-5 Year Investment Grade Corporate Bond ETF0.04%$23.7B+$575M-2bp on fee · +$575M in over the monthHead-to-head
IGIB iShares 5-10 Year Investment Grade Corporate Bond ETF0.04%$18.6B+$412M-2bp on fee · +$412M in over the monthHead-to-head
MUB iShares National Muni Bond ETF0.05%$46B+$2B-1bp on fee · +$2B in over the monthHead-to-head
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InstrumentsHarvest substitutesTrade cost at $1MClient tearsheetStress this fund
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