IDBT.L vs. VDTY.L
IDBT.L (iShares $ Treasury Bond 1-3yr UCITS ETF) and VDTY.L (Vanguard USD Treasury Bond UCITS ETF) are both Government Bonds funds - IDBT.L tracks the iShares $ Treasury Bond 1-3yr UCITS ETF while VDTY.L tracks the Bloomberg Global Aggregate US Treasury Float Adjusted Index. Both are passively managed. Over the past 10 years, IDBT.L returned 1.76%/yr vs 0.78%/yr for VDTY.L. A 0.70 correlation means they provide meaningful diversification when combined. IDBT.L charges 0.07%/yr vs 0.05%/yr for VDTY.L.
Performance
IDBT.L vs. VDTY.L - Performance Comparison
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Returns By Period
In the year-to-date period, IDBT.L achieves a 0.76% return, which is significantly higher than VDTY.L's -0.40% return. Over the past 10 years, IDBT.L has outperformed VDTY.L with an annualized return of 1.76%, while VDTY.L has yielded a comparatively lower 0.78% annualized return.
IDBT.L
- 1D
- 0.00%
- 1M
- 0.15%
- 6M
- 0.76%
- YTD
- 0.76%
- 1Y
- 3.38%
- 3Y*
- 4.30%
- 5Y*
- 1.93%
- 10Y*
- 1.76%
VDTY.L
- 1D
- 0.09%
- 1M
- -0.24%
- 6M
- -0.40%
- YTD
- -0.40%
- 1Y
- 3.41%
- 3Y*
- 2.87%
- 5Y*
- -0.72%
- 10Y*
- 0.78%
IDBT.L vs. VDTY.L - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IDBT.L iShares $ Treasury Bond 1-3yr UCITS ETF | 0.76% | 5.28% | 4.03% | 4.16% | -3.71% | -0.64% | 3.13% | 3.67% | 1.34% | 0.33% |
VDTY.L Vanguard USD Treasury Bond UCITS ETF | -0.40% | 6.28% | 0.84% | 3.77% | -12.31% | -2.40% | 7.67% | 7.06% | 0.78% | 2.34% |
Correlation
The correlation between IDBT.L and VDTY.L is 0.76, 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 | 0.76 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.75 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.77 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.70 |
Correlation (All Time) Calculated using the full available price history since Feb 24, 2016 | 0.70 |
The correlation between IDBT.L and VDTY.L has been stable across timeframes, ranging from 0.70 to 0.77 - a consistent structural relationship.
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Return for Risk
IDBT.L vs. VDTY.L — Risk / Return Rank
IDBT.L
VDTY.L
IDBT.L vs. VDTY.L - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares $ Treasury Bond 1-3yr UCITS ETF (IDBT.L) and Vanguard USD Treasury Bond UCITS ETF (VDTY.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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| IDBT.L | VDTY.L | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.66 | ||
| Sortino ratioReturn per unit of downside risk | +2.77 | ||
| Omega ratioGain probability vs. loss probability | 1.52 | 1.17 | +0.35 |
| Calmar ratioReturn relative to maximum drawdown | 4.37 | 1.14 | +3.23 |
| Martin ratioReturn relative to average drawdown | 16.88 | 3.11 | +13.77 |
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Drawdowns
IDBT.L vs. VDTY.L - Drawdown Comparison
The maximum IDBT.L drawdown since its inception was -5.66%, smaller than the maximum VDTY.L drawdown of -18.98%. Use the drawdown chart below to compare losses from any high point for IDBT.L and VDTY.L.
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Drawdown Indicators
| IDBT.L | VDTY.L | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -5.66% | -18.98% | +13.32% |
Max Drawdown (1Y)Largest decline over 1 year | -0.72% | -2.97% | +2.25% |
Max Drawdown (3Y)Largest decline over 3 years | -0.97% | -5.21% | +4.24% |
Max Drawdown (5Y)Largest decline over 5 years | -5.66% | -16.59% | +10.93% |
Max Drawdown (10Y)Largest decline over 10 years | -5.66% | -18.98% | +13.32% |
Current DrawdownCurrent decline from peak | 0.00% | -7.13% | +7.13% |
Average DrawdownAverage peak-to-trough decline | -0.56% | -6.66% | +6.10% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.19% | 1.09% | -0.90% |
Volatility
IDBT.L vs. VDTY.L - Volatility Comparison
The current volatility for iShares $ Treasury Bond 1-3yr UCITS ETF (IDBT.L) is 0.39%, while Vanguard USD Treasury Bond UCITS ETF (VDTY.L) has a volatility of 0.93%. This indicates that IDBT.L experiences smaller price fluctuations and is considered to be less risky than VDTY.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IDBT.L | VDTY.L | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.39% | 0.93% | -0.54% |
Volatility (6M)Calculated over the trailing 6-month period | 0.92% | 2.58% | -1.66% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.21% | 3.52% | -2.31% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.99% | 5.55% | -3.56% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 1.77% | 4.86% | -3.09% |
IDBT.L vs. VDTY.L - Expense Ratio Comparison
IDBT.L has a 0.07% expense ratio, which is higher than VDTY.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
IDBT.L vs. VDTY.L - Dividend Comparison
IDBT.L's dividend yield for the trailing twelve months is around 3.99%, less than VDTY.L's 4.27% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IDBT.L iShares $ Treasury Bond 1-3yr UCITS ETF | 3.99% | 4.15% | 4.25% | 2.97% | 0.74% | 0.63% | 1.71% | 2.31% | 1.57% | 0.96% | 0.74% | 0.51% |
VDTY.L Vanguard USD Treasury Bond UCITS ETF | 4.27% | 4.29% | 4.07% | 3.40% | 2.09% | 1.21% | 1.54% | 2.34% | 2.33% | 1.57% | 0.99% | 0.00% |
Frequently Asked Questions
IDBT.L and VDTY.L have a correlation of 0.76, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, VDTY.L is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.
VDTY.L is cheaper with a 0.05% expense ratio, compared with 0.07% for IDBT.L.
IDBT.L tracks iShares $ Treasury Bond 1-3yr UCITS ETF, while VDTY.L tracks Bloomberg Global Aggregate US Treasury Float Adjusted Index. They also come from different issuers: iShares and Vanguard. Their fees differ too: 0.07% for IDBT.L and 0.05% for VDTY.L.
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