ETF · iShares
CU31 iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B
ISIN IE00B3VWN179London Stock Exchange: CU31BlackRock, Inc.
- Government bonds
- ETF
- ISA
- SIPP
- Accumulating
Latest close
LSE£95.41
on
- Ongoing charge
- 0.07% a year
- Fund size
- £519m
As of , at least 15 min delayed
At a glance
As of 13/11/2026, CU31 (iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B, ISIN IE00B3VWN179) closed at £95.41 on the London Stock Exchange. Its ongoing charge is 0.07% a year (about £7 on £10,000). Over the five years to 13/11/2026 its total return was +12.4%, or −12.3% after UK CPIH inflation.
Past returns
- 1 year to 13/11/2026
- +0.7%
- −2.9% after inflation (UK CPIH)
- 3 years to 13/11/2026
- +3.5%
- −6.5% after inflation (UK CPIH)
- 5 years to 13/11/2026
- +12.4%
- −12.3% after inflation (UK CPIH)
£1,000 put in five years ago would have been worth about £1,124 on 13/11/2026 — about £877 in today’s spending power, once price rises are taken out. Past performance is not a guide to future returns.
Returns: as reported (delayed data). Inflation: UK CPIH, latest month published.
How we work it out:ReturnsReturns after inflationTotal returnReal returnCPIH
Calendar-year and 12-month returns
Calendar-year returns of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B in pounds (price, with income reinvested in the fund): 2022 +7.7%, 2023 −1.6%, 2024 +6.9%, 2025 −3.3%; 2026 to 13/11/2026 +3.2%. Returns of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B in pounds (price, with income reinvested in the fund) over the 12 months to 30/09/2026: +3.0%; to 30/09/2025: +3.3%; to 30/09/2024: −2.7%; to 30/09/2023: −6.6%; to 30/09/2022: +15.5%.
| Year | Return | After inflation | Return shown as a bar |
|---|---|---|---|
| to | +3.2% | −0.1% | |
| to | −3.3% | −6.6% | |
| to | +6.9% | +3.2% | |
| −1.6% | −5.5% | ||
| +7.7% | −1.4% |
| 12 months to | Return | After inflation |
|---|---|---|
| from | +3.0% | −0.7% |
| from | +3.3% | −0.7% |
| from | −2.7% | −5.2% |
| from | −6.6% | −12.2% |
| from | +15.5% | +6.2% |
As of , inflation: UK CPIH
How we work it out:Calendar-year returnsWhat a calendar-year return isAccumulating and distributing
Risk: volatility and largest fall
Volatility (annualised)
7.2%over 5 years
| 1 year | 5.2% |
|---|---|
| 3 years | 6.1% |
| 5 years | 7.2% |
Annualised from weekly returns. Higher means bumpier.
- Largest fall since November 2021
- −14.8%
- From to
- Lowest 12-month return
- −8.9%
- 12 months to
- Highest 12-month return
- +18.7%
- 12 months to
- Below its highest weekly close since November 2021
- 4.0%
- High of , latest
In words: Volatility of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B in pounds, annualised from weekly returns to 13/11/2026: 5.2% over 1 year, 6.1% over 3 years, 7.2% over 5 years. Largest fall in the price of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B since November 2021, in pounds: −14.8% from 23/09/2022 to 14/07/2023. The lowest 12-month return of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B in pounds (price, with income reinvested in the fund) since January 2021 was −8.9% (12 months to 14/07/2023); the highest was +18.7% (12 months to 23/09/2022). On 13/11/2026 the price of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B was 4.0% below its highest weekly close since November 2021 (23/09/2022), in pounds.
As of , price, with income reinvested in the fund
How we work it out:Risk figuresFallsVolatilityLargest fall
Charges compared with similar funds
- Ongoing charge
- 0.07%
- a year
- On £10,000
- £7
- a year, roughly
- Over five years
- £35
- of £10,000, before growth
- 40 charge less
- 30 the same
- 241 charge more
Ongoing charge of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B 0.07% a year. Compared on 14/11/2026, 241 of the 311 other government bond funds charge more, 30 the same and 40 less (share classes counted once).
As of
A lower charge is not a promise of a higher return: what the fund holds matters more.
As of
Read more:Ongoing charge (OCF)OCF and TERFee dragHow charges add up
In plain English
iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B is an exchange-traded fund (ETF) from iShares, launched in 2009.
It tracks the ICE BofA US Treasury Bond (1-3 Y).
You buy and sell it through a share-dealing account or platform during stock-market hours, like a share.
Its ongoing charge is 0.07% a year — about £7 a year on every £10,000 invested, taken from the fund's value rather than billed to you.
Income from its investments is reinvested inside the fund, so it shows up as a rising price rather than cash paid to you.
Government bonds: Loans to governments, such as UK gilts and US Treasuries. They pay interest; their prices move when interest rates change.
Terms:ETFIndex fundUCITSAccumulating or incomeShare classISIN
Key facts
- Ticker
- CU31
- ISIN
- IE00B3VWN179
- Also listed as
- CBU3 (London Stock Exchange, US dollars)
- Provider
- iShares
- Structure
- ETF
- An exchange-traded fund: bought and sold on the stock exchange through the day, like a share.
- Income
- Accumulating
- Income is reinvested inside the fund, so it shows up as a rising price rather than cash paid to you.
- Ongoing charge
- 0.07% a year · about £7 on £10,000
- Fund size
- £519m
- Launched
- Domicile
- Ireland
- UK reporting fund status
- Yes — on HMRC’s list of reporting funds (list of )
- Reporting fund since . What reporting fund status means
- Can usually be held in
- ISA and SIPP
- Check with your platform: each decides which funds it offers.
- Currency hedged
- No
- Price currency
- Pounds (GBP)
- Category
- Government bonds
Price chart
Over the last year, the closing price went from £94.18 on 14/11/2025 to £95.41 on 13/11/2026 (+1.3%). The lowest close shown was £91.16 on 30/01/2026 and the highest £95.41 on 13/11/2026.
One close a week. Before 04/08/2026 the closes are from the weekly price history for this listing; from then on, the closing prices we have recorded.
As of , at least 15 min delayed
Five years of prices, and after inflation
260 weekly closes, from 12/11/2021 to 13/11/2026. The same history in November 2026 pounds, adjusted with CPIH inflation.
Create a free account to see the 5-year price chart and the after-inflation chart
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How we work it out:Prices and returnsNAV and price
What it holds
- Holdings
- 92
- on record
- Ten largest
- 16.8%
- of the whole fund
- Effective number of holdings
- 83
- As concentrated as this many equal-sized holdings (how it is worked out)
- Largest holding
- 2.8%
- Treasury Note 4.13% 30/06/2028
Top 10 holdings
| Rank# | Holding | Weight as a percentage of the fund |
|---|---|---|
| 1 | Treasury Note 4.13% 30/06/2028Treasury | 2.81% |
| 2 | Treasury Note 3.50% 31/01/2028Treasury | 2.23% |
| 3 | Treasury Note 4.00% 31/10/2029Treasury | 1.74% |
| 4 | Treasury Note 3.88% 30/09/2029Treasury | 1.68% |
| 5 | Treasury Note (2OLD) 4.13% 31/08/2028Treasury | 1.43% |
| 6 | Treasury Note (Otr) 4.63% 31/10/2028Treasury | 1.42% |
| 7 | Treasury Note 3.63% 31/08/2029Treasury | 1.41% |
| 8 | Treasury Note 4.00% 31/05/2028Treasury | 1.38% |
| 9 | Treasury Note 4.00% 31/07/2029Treasury | 1.38% |
| 10 | Treasury Note 3.88% 31/03/2028Treasury | 1.36% |
As of , holdings as published
See the full portfolio
Every holding with search and filters, the whole breakdown by sector, country and type of asset, a map of the 92 largest and what changed since .
More of the portfolio
The fund publishes 90 holdings; the ten largest make up 16.8% of it. The fund's portfolio is also split by currency, maturity and credit quality.
Create a free account to see the full holdings list and the currency, maturity and credit-quality breakdowns
Sign-up takes an email address. There is no card to enter and nothing to pay.
Holdings:Compare what it holds with another fundHoldings overlapHow overlap is measured
Funds tracking the same index
4 funds track ICE BofA US Treasury Bond (1-3 Y), this one included and share classes counted once; their ongoing charges range from 0.07% to 0.10% a year (13/11/2026).
| Fund | Charge | 1 year | 3 years | 5 years |
|---|---|---|---|---|
| iShares USD Treasury Bond 1-3yr UCITS ETFDistributing · 0.10% a year | 0.10% | +1.9% | +12.4% | +8.7% |
| iShares USD Treasury Bond 1-3yr UCITS ETF AccumHedged GBPAccumulating · Currency hedged · 0.10% a year | 0.10% | +1.9% | Not reported | Not reported |
| iShares USD Treasury Bond 1-3yr UCITS ETF EUR Hedged AccAccumulating · Currency hedged · 0.10% a year | 0.10% | −5.0% | +2.6% | −1.6% |
| iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) BThis fundAccumulating · 0.07% a year | 0.07% | +0.7% | +3.5% | +12.4% |
As of
ICE BofA US Treasury Bond (1-3 Y) funds compared: charges, sizes and share classes
Read more:Index fundsTracking differenceHow funds are compared
Other versions of this fund
- iShares USD Treasury Bond 1-3yr UCITS ETFDistributing · 0.10% a year · IE00BDFK1N50
- iShares USD Treasury Bond 1-3yr UCITS ETF AccumHedged GBPAccumulating · Currency hedged · 0.10% a year · IE000KN6U873
- iShares USD Treasury Bond 1-3yr UCITS ETF EUR Hedged AccAccumulating · Currency hedged · 0.10% a year · IE00BDFK1573
Read more:Share classesAccumulating or incomeCurrency hedging
Risk and return in depth
Sharpe, Sortino and Calmar ratios
Sharpe, Sortino and Calmar ratios over 1, 3 and 5 years, from weekly returns in pounds.
With a free accountRolling returns
The full range of 252 rolling 12-month returns since January 2021, and of 148 rolling three-year returns, in pounds, with how often they were above zero.
With a free accountLargest falls and recoveries
The 3 largest falls since November 2021, in pounds, with how many weeks each took to reach its low and to recover.
With a free account
Create a free account to see the risk ratios, every rolling return and each large fall and its recovery
Sign-up takes an email address. There is no card to enter and nothing to pay.
Moves compared with a similar fund
Correlation and beta of weekly returns in pounds against iShares Core UK Gilts UCITS ETF, over the three years to 13/11/2026 (152 weeks).
Pro
Pro — currently by invitation
Pro includes moves against a comparable fund
Pro is open by invitation while it is being built. There is nothing to buy. To ask about access, email [email protected].
Questions people ask
What is the ongoing charge of CU31?
The ongoing charge of CU31 is 0.07% a year — about £7 a year on every £10,000 invested, taken from the fund’s value rather than billed to you. Platform and dealing fees are charged separately. Ongoing charge of iShares VII plc-iShares USD Treasury Bond 1-3yr UCITS ETF USD (Acc) B 0.07% a year. Compared on 14/11/2026, 241 of the 311 other government bond funds charge more, 30 the same and 40 less (share classes counted once).
What does CU31 track?
CU31 tracks the ICE BofA US Treasury Bond (1-3 Y).
Is CU31 accumulating or distributing?
CU31 is accumulating: income is reinvested inside the fund, so it shows up as a rising price rather than cash paid to you.
What is the ISIN of CU31?
The ISIN of CU31 is IE00B3VWN179. An ISIN identifies one exact share class of a fund; CU31 is its ticker on the London Stock Exchange. The same share class is also listed as CBU3 (London Stock Exchange, US dollars).
What does CU31 hold?
As of 06/11/2026, CU31 holds 90 positions, according to its published holdings. The largest is Treasury Note 4.13% 30/06/2028 at 2.81% of the fund; the ten largest make up 16.8%. Its ten largest holdings are Treasury Note 4.13% 30/06/2028 (2.81%), Treasury Note 3.50% 31/01/2028 (2.23%), Treasury Note 4.00% 31/10/2029 (1.74%), Treasury Note 3.88% 30/09/2029 (1.68%), Treasury Note (2OLD) 4.13% 31/08/2028 (1.43%), Treasury Note (Otr) 4.63% 31/10/2028 (1.42%), Treasury Note 3.63% 31/08/2029 (1.41%), Treasury Note 4.00% 31/05/2028 (1.38%), Treasury Note 4.00% 31/07/2029 (1.38%) and Treasury Note 3.88% 31/03/2028 (1.36%).
What were CU31’s returns in each of the last five years?
Calendar-year returns of CU31 in pounds (price, with income reinvested in the fund): 2022 +7.7%, 2023 −1.6%, 2024 +6.9%, 2025 −3.3%; 2026 to 13/11/2026 +3.2%. Past performance is not a guide to future returns.
How has CU31 done after inflation?
Over the five years to 13/11/2026 CU31’s total return was +12.4%, or −12.3% after UK CPIH inflation. Past performance is not a guide to future returns.
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Fund documents and methods
- Fund documents
- Fund page at iShares · Key investor information document (KIID) · Factsheet (links checked )
Methodology:ReturnsCategoriesAll methods
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