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iShares Core Total USD Bond Market (IUSB)

Bond ETF · iShares (BlackRock) · NASDAQ · 18,110 holdings
$44.77 ▲ +0.34 (0.77%)
At close · USD · Volume 8,228,424
Returns and riskCostIncomeDividend historyHoldingsQuestions
52-week range
$43.75 – $47.23
Day's range
$44.55 – $44.82
1-year total return
−0.9%

IUSB price chart

Daily, split-corrected, distributions markedEnd-of-day prices

IUSB fund facts

FundiShares Core Total USD Bond Market ETF
TickerIUSB · NASDAQ
Issuer (by our rules)iShares (BlackRock)
Category (by our rules)Bond
Expense ratio0.06%
Holdings18,110
Net assets (fund, SEC)$43.0B
Yield (last 12 months)4.34%
DistributionsMonthly
52-week range$43.75 – $47.23
Average volume (3 months)6,879,272
First price in our data12 Jun 2014
Issuer and category are assigned by StocksXray rules from the fund name. Expense ratio and net assets come from SEC filings; where a fund does not file them (for example grantor trusts) the field stays empty.

Returns and risk

1 month
+0.0%
3 months
−0.6%
6 months
−1.5%
Year to date
−0.7%
1 year
−0.9%
3 years a year
+5.8%
5 years a year
+0.2%
10 years a year
+1.6%
Volatility (1 year)
3.9%
Largest drop, last year
−4.3%
Largest drop in our data
−18.0%
Total return includes distributions, from end-of-day prices adjusted for splits and distributions, to 22 Oct 2026. Periods of 3 years and longer are annualised and shown only when the fund's history is long enough. Volatility is the standard deviation of daily returns over the last year, annualised. Past performance does not guarantee future results.

Cost: expense ratio

0.06% a year

On $10,000 invested that is about $6 a year in fund costs, taken out of the fund's assets.

Source: the fund's prospectus, as filed with the SEC on 23 Feb 2026 (risk/return summary data). Brokerage commissions and the bid-ask spread are separate costs.

Income: distributions

Paid, last 12 months
1.94 USD
Yield on today's price
4.34%
Frequency
Monthly
Latest ex-date
1 Oct 2026
Full IUSB dividend history →
Cash paid per current share (restated for share splits), before tax, from EODHD.

IUSB top holdings

#HoldingWeight
1 BlackRock Liquidity Funds 4.36%
2 BlackRock Funds III 0.80%
3 Federal National Mortgage Association or Federal Home Loan Mortgage Corp. 0.41%
4 United States of America 0.37%
5 United States of America 0.37%
6 United States of America 0.36%
7 United States of America 0.35%
8 United States of America 0.34%
9 United States of America 0.34%
10 United States of America 0.34%
The top 10 make up 8.0% of the fund, out of 18,110 holdings.
Positions as of 31 Jul 2026, from the fund's Form N-PORT filed with the SEC. Public N-PORT holdings are quarter-end positions published about 60 days later, so they can be months old and the fund may have changed since.

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IUSB: frequently asked questions

What is IUSB?

IUSB is the iShares Core Total USD Bond Market ETF, issued by iShares (BlackRock), listed on NASDAQ. By our rules it is classed as "Bond". Its latest SEC filing lists 18,110 holdings.

What is the expense ratio of IUSB?

IUSB charges 0.06% a year, according to its prospectus filed with the SEC on 23 Feb 2026. On $10,000 that is about $6 a year in fund costs.

Does IUSB pay dividends?

Yes. IUSB paid 1.94 per share over the last 12 months, monthly, a trailing yield of 4.34% on today's price. The latest ex-dividend date was 1 Oct 2026.

What does IUSB hold?

The largest holdings in the latest SEC filing are BlackRock Liquidity Funds (4.4%), BlackRock Funds III (0.8%), Federal National Mortgage Association or Federal Home Loan Mortgage Corp. (0.4%). The top 10 together make up 8.0% of the fund.

How has IUSB performed?

Total return including distributions to 22 Oct 2026: 1 year −0.9%, 3 years +5.8% a year, 5 years +0.2% a year. Past performance does not guarantee future results.

Where the numbers come from

Prices and distributions end-of-day data from EODHD; returns are our own calculations from it.
Expense ratio and holdings SEC filings (prospectus risk/return data and Form N-PORT).
Category, issuer and leverage assigned by StocksXray rules from the fund name.
X-Ray look-through our scores applied to the SEC holdings.
Read the methodology →

StocksXray is for education only and is not financial advice or a recommendation to buy or sell anything. Past performance does not guarantee future results; funds can lose value.