SDIA.L vs. AT1S.L
SDIA.L (iShares USD Short Duration Corporate Bond UCITS ETF (Acc)) and AT1S.L (Invesco USD AT1 CoCo Bond UCITS ETF GBP Hedged Dist) are both exchange-traded funds - SDIA.L is a Corporate Bonds fund tracking the Bloomberg US Corp 1-3 Yr TR USD, while AT1S.L is a Preferred Stock/Convertible Bonds fund tracking the iBoxx USD Contingent Convertible Liquid Developed Market AT1 (8% Issuer Cap) Index. Both are passively managed. Over the past 5 years, SDIA.L returned 2.46%/yr vs 1.77%/yr for AT1S.L. At a 0.24 correlation, their price movements are largely independent. SDIA.L charges 0.20%/yr vs 0.39%/yr for AT1S.L.
Performance
SDIA.L vs. AT1S.L - Performance Comparison
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Different Trading Currencies
SDIA.L is traded in USD, while AT1S.L is traded in GBp. To make them comparable, the AT1S.L values have been converted to USD using the latest available exchange rates.
Returns By Period
In the year-to-date period, SDIA.L achieves a 0.95% return, which is significantly lower than AT1S.L's 2.62% return.
SDIA.L
- 1D
- 0.00%
- 1M
- 0.16%
- 6M
- 0.79%
- YTD
- 0.95%
- 1Y
- 4.08%
- 3Y*
- 5.20%
- 5Y*
- 2.46%
- 10Y*
- —
AT1S.L
- 1D
- 1.24%
- 1M
- 1.21%
- 6M
- 2.18%
- YTD
- 2.62%
- 1Y
- 8.15%
- 3Y*
- 11.62%
- 5Y*
- 1.77%
- 10Y*
- —
SDIA.L vs. AT1S.L - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
SDIA.L iShares USD Short Duration Corporate Bond UCITS ETF (Acc) | 0.95% | 6.22% | 4.94% | 5.68% | -4.49% | -0.70% | 4.50% | 6.15% | 0.59% |
AT1S.L Invesco USD AT1 CoCo Bond UCITS ETF GBP Hedged Dist | 2.62% | 18.80% | 7.97% | 6.74% | -20.54% | 2.16% | 8.48% | 20.91% | -6.27% |
Correlation
The correlation between SDIA.L and AT1S.L is 0.25, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.25 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.30 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.27 |
Correlation (All Time) Calculated using the full available price history since Sep 25, 2018 | 0.24 |
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Return for Risk
SDIA.L vs. AT1S.L — Risk / Return Rank
SDIA.L
AT1S.L
SDIA.L vs. AT1S.L - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares USD Short Duration Corporate Bond UCITS ETF (Acc) (SDIA.L) and Invesco USD AT1 CoCo Bond UCITS ETF GBP Hedged Dist (AT1S.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.
| SDIA.L | AT1S.L | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.92 | ||
| Sortino ratioReturn per unit of downside risk | +1.37 | ||
| Omega ratioGain probability vs. loss probability | 1.40 | 1.17 | +0.23 |
| Calmar ratioReturn relative to maximum drawdown | 3.70 | 1.11 | +2.59 |
| Martin ratioReturn relative to average drawdown | 14.20 | 3.35 | +10.85 |
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Drawdowns
SDIA.L vs. AT1S.L - Drawdown Comparison
The maximum SDIA.L drawdown since its inception was -12.55%, smaller than the maximum AT1S.L drawdown of -37.63%. Use the drawdown chart below to compare losses from any high point for SDIA.L and AT1S.L.
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Drawdown Indicators
| SDIA.L | AT1S.L | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -12.55% | -37.63% | +25.08% |
Max Drawdown (1Y)Largest decline over 1 year | -1.10% | -7.32% | +6.22% |
Max Drawdown (3Y)Largest decline over 3 years | -1.32% | -9.48% | +8.16% |
Max Drawdown (5Y)Largest decline over 5 years | -7.61% | -36.09% | +28.48% |
Current DrawdownCurrent decline from peak | -0.16% | -1.13% | +0.97% |
Average DrawdownAverage peak-to-trough decline | -1.15% | -10.03% | +8.88% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.29% | 2.43% | -2.14% |
Volatility
SDIA.L vs. AT1S.L - Volatility Comparison
The current volatility for iShares USD Short Duration Corporate Bond UCITS ETF (Acc) (SDIA.L) is 0.80%, while Invesco USD AT1 CoCo Bond UCITS ETF GBP Hedged Dist (AT1S.L) has a volatility of 2.24%. This indicates that SDIA.L experiences smaller price fluctuations and is considered to be less risky than AT1S.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SDIA.L | AT1S.L | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.80% | 2.24% | -1.44% |
Volatility (6M)Calculated over the trailing 6-month period | 1.81% | 7.37% | -5.56% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.22% | 8.91% | -6.69% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 2.78% | 13.91% | -11.13% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.50% | 16.07% | -12.57% |
SDIA.L vs. AT1S.L - Expense Ratio Comparison
SDIA.L has a 0.20% expense ratio, which is lower than AT1S.L's 0.39% expense ratio.
Dividends
SDIA.L vs. AT1S.L - Dividend Comparison
SDIA.L has not paid dividends to shareholders, while AT1S.L's dividend yield for the trailing twelve months is around 6.00%.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 |
|---|---|---|---|---|---|---|---|---|---|
AT1S.L Invesco USD AT1 CoCo Bond UCITS ETF GBP Hedged Dist | 6.00% | 5.91% | 6.29% | 6.12% | 6.02% | 4.36% | 5.31% | 5.45% | 1.13% |
SDIA.L iShares USD Short Duration Corporate Bond UCITS ETF (Acc) | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
SDIA.L and AT1S.L have a correlation of 0.25, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, SDIA.L is cheaper at 0.20% per year. The better choice depends on whether you care most about return, fees, risk, or income.
SDIA.L is cheaper with a 0.20% expense ratio, compared with 0.39% for AT1S.L.
SDIA.L is categorized as Corporate Bonds, while AT1S.L is Preferred Stock/Convertible Bonds. SDIA.L tracks Bloomberg US Corp 1-3 Yr TR USD, while AT1S.L tracks iBoxx USD Contingent Convertible Liquid Developed Market AT1 (8% Issuer Cap) Index. They also come from different issuers: iShares and Invesco. Their fees differ too: 0.20% for SDIA.L and 0.39% for AT1S.L.
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