CU31.L vs. TSY3.L
CU31.L (iShares USD Treasury Bond 1-3yr UCITS ETF (Acc)) and TSY3.L (SPDR Bloomberg 1-3 Year US Treasury Bond UCITS ETF) are both Government Bonds funds - CU31.L tracks the ICE US Treasury 1-3 Year Index while TSY3.L tracks the Bloomberg US 1-3 Year Treasury Bond Index. Both are passively managed. Over the past 10 years, CU31.L returned 2.48%/yr vs 2.44%/yr for TSY3.L. With a 0.99 correlation, they move nearly in lockstep. CU31.L charges 0.07%/yr vs 0.05%/yr for TSY3.L.
Performance
CU31.L vs. TSY3.L - Performance Comparison
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Different Trading Currencies
CU31.L is traded in GBp, while TSY3.L is traded in GBP. To make them comparable, the TSY3.L values have been converted to GBp using the latest available exchange rates.
Returns By Period
In the year-to-date period, CU31.L achieves a 0.66% return, which is significantly lower than TSY3.L's 0.72% return. Both investments have delivered pretty close results over the past 10 years, with CU31.L having a 2.48% annualized return and TSY3.L not far behind at 2.44%.
CU31.L
- 1D
- 0.11%
- 1M
- 1.13%
- YTD
- 0.66%
- 6M
- 0.30%
- 1Y
- 4.42%
- 3Y*
- 1.49%
- 5Y*
- 2.92%
- 10Y*
- 2.48%
TSY3.L
- 1D
- 0.10%
- 1M
- 1.10%
- YTD
- 0.72%
- 6M
- 0.32%
- 1Y
- 4.44%
- 3Y*
- 1.49%
- 5Y*
- 2.87%
- 10Y*
- 2.44%
CU31.L vs. TSY3.L - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
CU31.L iShares USD Treasury Bond 1-3yr UCITS ETF (Acc) | 0.66% | -1.98% | 5.81% | -1.58% | 7.82% | 0.48% | -0.40% | 0.29% | 7.25% | -8.69% |
TSY3.L SPDR Bloomberg 1-3 Year US Treasury Bond UCITS ETF | 0.72% | -2.00% | 5.79% | -1.65% | 7.59% | 0.51% | -0.46% | 0.22% | 7.27% | -8.65% |
Correlation
The correlation between CU31.L and TSY3.L is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 1.00 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.99 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.99 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.99 |
Correlation (All Time) Calculated using the full available price history since Sep 10, 2013 | 0.99 |
The correlation between CU31.L and TSY3.L has been stable across timeframes, ranging from 0.99 to 1.00 - a consistent structural relationship.
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Return for Risk
CU31.L vs. TSY3.L — Risk / Return Rank
CU31.L
TSY3.L
CU31.L vs. TSY3.L - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares USD Treasury Bond 1-3yr UCITS ETF (Acc) (CU31.L) and SPDR Bloomberg 1-3 Year US Treasury Bond UCITS ETF (TSY3.L). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
| CU31.L | TSY3.L | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | 0.00 | ||
| Sortino ratioReturn per unit of downside risk | -0.01 | ||
| Omega ratioGain probability vs. loss probability | 1.12 | 1.13 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 0.97 | 0.98 | -0.01 |
| Martin ratioReturn relative to average drawdown | 2.47 | 2.50 | -0.03 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| CU31.L | TSY3.L | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.72 | 0.72 | 0.00 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.36 | 0.35 | +0.01 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.27 | 0.26 | +0.01 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.28 | 0.31 | -0.03 |
Drawdowns
CU31.L vs. TSY3.L - Drawdown Comparison
The maximum CU31.L drawdown since its inception was -18.80%, roughly equal to the maximum TSY3.L drawdown of -18.75%. Use the drawdown chart below to compare losses from any high point for CU31.L and TSY3.L.
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Drawdown Indicators
| CU31.L | TSY3.L | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.80% | -18.75% | -0.05% |
Max Drawdown (1Y)Largest decline over 1 year | -4.51% | -4.50% | -0.01% |
Max Drawdown (3Y)Largest decline over 3 years | -8.91% | -8.92% | +0.01% |
Max Drawdown (5Y)Largest decline over 5 years | -16.29% | -16.38% | +0.09% |
Max Drawdown (10Y)Largest decline over 10 years | -18.80% | -18.75% | -0.05% |
Current DrawdownCurrent decline from peak | -7.61% | -7.69% | +0.08% |
Average DrawdownAverage peak-to-trough decline | -8.23% | -7.81% | -0.42% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.78% | 1.77% | +0.01% |
Volatility
CU31.L vs. TSY3.L - Volatility Comparison
iShares USD Treasury Bond 1-3yr UCITS ETF (Acc) (CU31.L) and SPDR Bloomberg 1-3 Year US Treasury Bond UCITS ETF (TSY3.L) have volatilities of 1.63% and 1.67%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| CU31.L | TSY3.L | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.63% | 1.67% | -0.04% |
Volatility (6M)Calculated over the trailing 6-month period | 4.46% | 4.50% | -0.04% |
Volatility (1Y)Calculated over the trailing 1-year period | 6.11% | 6.14% | -0.03% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 8.05% | 8.21% | -0.16% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 9.19% | 9.29% | -0.10% |
CU31.L vs. TSY3.L - Expense Ratio Comparison
CU31.L has a 0.07% expense ratio, which is higher than TSY3.L's 0.05% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
CU31.L vs. TSY3.L - Dividend Comparison
CU31.L has not paid dividends to shareholders, while TSY3.L's dividend yield for the trailing twelve months is around 3.92%.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CU31.L iShares USD Treasury Bond 1-3yr UCITS ETF (Acc) | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
TSY3.L SPDR Bloomberg 1-3 Year US Treasury Bond UCITS ETF | 3.92% | 4.25% | 4.07% | 3.02% | 0.60% | 0.56% | 1.84% | 2.14% | 1.31% | 1.04% | 0.63% | 0.52% |
Frequently Asked Questions
With a correlation of 1.00, CU31.L and TSY3.L move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
On fees, TSY3.L is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.
TSY3.L is cheaper with a 0.05% expense ratio, compared with 0.07% for CU31.L.
CU31.L tracks ICE US Treasury 1-3 Year Index, while TSY3.L tracks Bloomberg US 1-3 Year Treasury Bond Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.07% for CU31.L and 0.05% for TSY3.L.
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