IMBA.L vs. PR1T.L
IMBA.L (iShares US Mortgage Backed Securities UCITS ETF (Acc)) and PR1T.L (Amundi Prime US Treasury Bond 0-1 Y UCITS ETF DR USD (C)) are both exchange-traded funds - IMBA.L is a Mortgage Backed Securities fund tracking the Bloomberg US Mortgage Backed Securities Index, while PR1T.L is a Government Bonds fund tracking the Solactive US Treasury 0-1 Year Bond Index. Both are passively managed. Over the past 5 years, IMBA.L returned -0.07%/yr vs 3.32%/yr for PR1T.L. At a 0.22 correlation, their price movements are largely independent. IMBA.L charges 0.28%/yr vs 0.05%/yr for PR1T.L.
Performance
IMBA.L vs. PR1T.L - Performance Comparison
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Returns By Period
In the year-to-date period, IMBA.L achieves a -0.54% return, which is significantly lower than PR1T.L's 1.86% return.
IMBA.L
- 1D
- -0.18%
- 1M
- -0.72%
- 6M
- -0.00%
- YTD
- -0.54%
- 1Y
- 4.32%
- 3Y*
- 3.89%
- 5Y*
- -0.07%
- 10Y*
- —
- ALL TIME*
- 1.10%
PR1T.L
- 1D
- 0.00%
- 1M
- 0.25%
- 6M
- 1.68%
- YTD
- 1.86%
- 1Y
- 3.78%
- 3Y*
- 4.59%
- 5Y*
- 3.32%
- 10Y*
- —
- ALL TIME*
- 2.86%
IMBA.L vs. PR1T.L - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | |
|---|---|---|---|---|---|---|---|
IMBA.L iShares US Mortgage Backed Securities UCITS ETF (Acc) | -0.54% | 8.35% | 1.58% | 3.66% | -11.44% | -1.51% | 0.31% |
PR1T.L Amundi Prime US Treasury Bond 0-1 Y UCITS ETF DR USD (C) | 1.86% | 4.23% | 5.21% | 4.82% | 0.61% | 0.09% | -0.07% |
Correlation
The correlation between IMBA.L and PR1T.L is 0.04, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.04 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.13 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.24 |
Correlation (All Time) Calculated using the full available price history since Sep 22, 2020 | 0.22 |
The correlation between IMBA.L and PR1T.L shifts across timeframes, from 0.04 (1 year) to 0.24 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
IMBA.L vs. PR1T.L — Risk / Return Rank
IMBA.L
PR1T.L
IMBA.L vs. PR1T.L - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares US Mortgage Backed Securities UCITS ETF (Acc) (IMBA.L) and Amundi Prime US Treasury Bond 0-1 Y UCITS ETF DR USD (C) (PR1T.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.
| IMBA.L | PR1T.L | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -8.65 | ||
| Sortino ratioReturn per unit of downside risk | -24.82 | ||
| Omega ratioGain probability vs. loss probability | 1.16 | 10.62 | -9.46 |
| Calmar ratioReturn relative to maximum drawdown | 1.36 | 44.35 | -43.00 |
| Martin ratioReturn relative to average drawdown | 4.14 | 405.40 | -401.26 |
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Drawdowns
IMBA.L vs. PR1T.L - Drawdown Comparison
The maximum IMBA.L drawdown since its inception was -18.05%, which is greater than PR1T.L's maximum drawdown of -0.56%. Use the drawdown chart below to compare losses from any high point for IMBA.L and PR1T.L.
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Drawdown Indicators
| IMBA.L | PR1T.L | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.05% | -0.56% | -17.49% |
Max Drawdown (1Y)Largest decline over 1 year | -3.17% | -0.08% | -3.09% |
Max Drawdown (3Y)Largest decline over 3 years | -6.87% | -0.08% | -6.79% |
Max Drawdown (5Y)Largest decline over 5 years | -17.67% | -0.56% | -17.11% |
Current DrawdownCurrent decline from peak | -2.12% | 0.00% | -2.12% |
Average DrawdownAverage peak-to-trough decline | -4.43% | -0.05% | -4.38% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.04% | 0.01% | +1.03% |
Volatility
IMBA.L vs. PR1T.L - Volatility Comparison
iShares US Mortgage Backed Securities UCITS ETF (Acc) (IMBA.L) has a higher volatility of 1.37% compared to Amundi Prime US Treasury Bond 0-1 Y UCITS ETF DR USD (C) (PR1T.L) at 0.18%. This indicates that IMBA.L's price experiences larger fluctuations and is considered to be riskier than PR1T.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IMBA.L | PR1T.L | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.37% | 0.18% | +1.19% |
Volatility (6M)Calculated over the trailing 6-month period | 3.85% | 0.29% | +3.56% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.97% | 0.40% | +4.57% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 7.28% | 0.45% | +6.83% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.78% | 0.43% | +5.35% |
IMBA.L vs. PR1T.L - Expense Ratio Comparison
IMBA.L has a 0.28% expense ratio, which is higher than PR1T.L's 0.05% expense ratio.
Dividends
IMBA.L vs. PR1T.L - Dividend Comparison
Neither IMBA.L nor PR1T.L has paid dividends to shareholders.
Frequently Asked Questions
IMBA.L and PR1T.L have a correlation of 0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, PR1T.L is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.
PR1T.L is cheaper with a 0.05% expense ratio, compared with 0.28% for IMBA.L.
IMBA.L is categorized as Mortgage Backed Securities, while PR1T.L is Government Bonds. IMBA.L tracks Bloomberg US Mortgage Backed Securities Index, while PR1T.L tracks Solactive US Treasury 0-1 Year Bond Index. They also come from different issuers: iShares and Amundi. Their fees differ too: 0.28% for IMBA.L and 0.05% for PR1T.L.
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