USTY.L vs. IDTL.L
USTY.L (SPDR Bloomberg US Treasury Bond UCITS ETF) and IDTL.L (iShares Treasury Bond 20+ UCITS) are both Government Bonds funds - USTY.L tracks the Bloomberg US Treasury Index while IDTL.L tracks the ICE U.S. Treasury 20+ Year Bond Index. Both are passively managed. Over the past 10 years, USTY.L returned 2.28%/yr vs -0.82%/yr for IDTL.L. A 0.72 correlation means they provide meaningful diversification when combined. USTY.L charges 0.05%/yr vs 0.07%/yr for IDTL.L.
Performance
USTY.L vs. IDTL.L - Performance Comparison
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Different Trading Currencies
USTY.L is traded in GBP, while IDTL.L is traded in USD. To make them comparable, the IDTL.L values have been converted to GBP using the latest available exchange rates.
Returns By Period
In the year-to-date period, USTY.L achieves a 0.66% return, which is significantly higher than IDTL.L's -1.12% return. Over the past 10 years, USTY.L has outperformed IDTL.L with an annualized return of 2.28%, while IDTL.L has yielded a comparatively lower -0.82% annualized return.
USTY.L
- 1D
- 0.21%
- 1M
- 1.14%
- YTD
- 0.66%
- 6M
- 0.16%
- 1Y
- 6.01%
- 3Y*
- 1.22%
- 5Y*
- 1.37%
- 10Y*
- 2.28%
IDTL.L
- 1D
- 0.00%
- 1M
- 1.18%
- YTD
- -1.12%
- 6M
- -2.14%
- 1Y
- 4.46%
- 3Y*
- -4.15%
- 5Y*
- -5.13%
- 10Y*
- -0.82%
USTY.L vs. IDTL.L - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
USTY.L SPDR Bloomberg US Treasury Bond UCITS ETF | 0.66% | 0.10% | 3.36% | -1.37% | -1.66% | -0.86% | 4.57% | 4.20% | 7.22% | -6.43% |
IDTL.L iShares Treasury Bond 20+ UCITS | -0.73% | -2.79% | -5.56% | -2.89% | -22.14% | -3.81% | 13.67% | 11.27% | 3.98% | -0.45% |
Correlation
The correlation between USTY.L and IDTL.L is 0.57, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.57 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.65 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.68 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.72 |
Correlation (All Time) Calculated using the full available price history since Sep 21, 2015 | 0.72 |
The correlation between USTY.L and IDTL.L shifts across timeframes, from 0.57 (1 year) to 0.72 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
USTY.L vs. IDTL.L — Risk / Return Rank
USTY.L
IDTL.L
USTY.L vs. IDTL.L - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SPDR Bloomberg US Treasury Bond UCITS ETF (USTY.L) and iShares Treasury Bond 20+ UCITS (IDTL.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.
| USTY.L | IDTL.L | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.51 | ||
| Sortino ratioReturn per unit of downside risk | +0.70 | ||
| Omega ratioGain probability vs. loss probability | 1.17 | 1.08 | +0.09 |
| Calmar ratioReturn relative to maximum drawdown | 1.15 | 0.52 | +0.63 |
| Martin ratioReturn relative to average drawdown | 3.15 | 1.13 | +2.03 |
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
| USTY.L | IDTL.L | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.94 | 0.44 | +0.51 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.16 | -0.32 | +0.48 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.23 | -0.05 | +0.28 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.31 | -0.01 | +0.32 |
Drawdowns
USTY.L vs. IDTL.L - Drawdown Comparison
The maximum USTY.L drawdown since its inception was -23.02%, smaller than the maximum IDTL.L drawdown of -49.33%. Use the drawdown chart below to compare losses from any high point for USTY.L and IDTL.L.
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Drawdown Indicators
| USTY.L | IDTL.L | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -23.02% | -49.33% | +26.31% |
Max Drawdown (1Y)Largest decline over 1 year | -5.20% | -8.50% | +3.30% |
Max Drawdown (3Y)Largest decline over 3 years | -7.75% | -17.78% | +10.03% |
Max Drawdown (5Y)Largest decline over 5 years | -16.04% | -39.42% | +23.38% |
Max Drawdown (10Y)Largest decline over 10 years | -23.02% | -49.33% | +26.31% |
Current DrawdownCurrent decline from peak | -15.58% | -45.80% | +30.22% |
Average DrawdownAverage peak-to-trough decline | -12.04% | -22.97% | +10.93% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.90% | 3.94% | -2.04% |
Volatility
USTY.L vs. IDTL.L - Volatility Comparison
The current volatility for SPDR Bloomberg US Treasury Bond UCITS ETF (USTY.L) is 2.21%, while iShares Treasury Bond 20+ UCITS (IDTL.L) has a volatility of 3.11%. This indicates that USTY.L experiences smaller price fluctuations and is considered to be less risky than IDTL.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| USTY.L | IDTL.L | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.21% | 3.11% | -0.90% |
Volatility (6M)Calculated over the trailing 6-month period | 4.79% | 7.41% | -2.62% |
Volatility (1Y)Calculated over the trailing 1-year period | 6.35% | 10.22% | -3.87% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 8.77% | 15.83% | -7.06% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 10.02% | 16.88% | -6.86% |
USTY.L vs. IDTL.L - Expense Ratio Comparison
USTY.L has a 0.05% expense ratio, which is lower than IDTL.L's 0.07% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
USTY.L vs. IDTL.L - Dividend Comparison
USTY.L's dividend yield for the trailing twelve months is around 4.87%, more than IDTL.L's 4.36% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IDTL.L iShares Treasury Bond 20+ UCITS | 4.36% | 4.31% | 4.65% | 3.79% | 3.01% | 1.74% | 1.76% | 2.49% | 2.79% | 2.60% | 2.63% | 2.14% |
USTY.L SPDR Bloomberg US Treasury Bond UCITS ETF | 4.87% | 4.61% | 3.81% | 2.81% | 1.57% | 1.31% | 2.49% | 2.79% | 2.11% | 2.11% | 1.66% | 0.00% |
Frequently Asked Questions
USTY.L and IDTL.L have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, USTY.L is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.
USTY.L is cheaper with a 0.05% expense ratio, compared with 0.07% for IDTL.L.
USTY.L tracks Bloomberg US Treasury Index, while IDTL.L tracks ICE U.S. Treasury 20+ Year Bond Index. They also come from different issuers: State Street and iShares. Their fees differ too: 0.05% for USTY.L and 0.07% for IDTL.L.
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