BIL vs. AOR
BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) and AOR (iShares Core 60/40 Balanced Allocation ETF) are both exchange-traded funds - BIL is a Government Bonds fund tracking the Bloomberg 1-3 Month U.S. Treasury Bill Index, while AOR is a Diversified Portfolio fund tracking the S&P Target Risk Growth Index. Both are passively managed. Over the past 10 years, BIL returned 2.19%/yr vs 8.29%/yr for AOR. At a correlation of -0.01, they often move in opposite directions. BIL charges 0.14%/yr vs 0.15%/yr for AOR.
Performance
BIL vs. AOR - Performance Comparison
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Returns By Period
In the year-to-date period, BIL achieves a 1.54% return, which is significantly lower than AOR's 5.83% return. Over the past 10 years, BIL has underperformed AOR with an annualized return of 2.19%, while AOR has yielded a comparatively higher 8.29% annualized return.
BIL
- 1D
- 0.01%
- 1M
- 0.29%
- YTD
- 1.54%
- 6M
- 1.78%
- 1Y
- 3.88%
- 3Y*
- 4.62%
- 5Y*
- 3.42%
- 10Y*
- 2.19%
AOR
- 1D
- 0.28%
- 1M
- -0.54%
- YTD
- 5.83%
- 6M
- 6.57%
- 1Y
- 17.08%
- 3Y*
- 13.55%
- 5Y*
- 6.66%
- 10Y*
- 8.29%
BIL vs. AOR - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BIL SPDR Bloomberg 1-3 Month T-Bill ETF | 1.54% | 4.15% | 5.19% | 4.94% | 1.40% | -0.10% | 0.40% | 2.03% | 1.74% | 0.69% |
AOR iShares Core 60/40 Balanced Allocation ETF | 5.83% | 16.44% | 10.68% | 15.75% | -15.64% | 11.19% | 11.42% | 18.91% | -5.82% | 15.80% |
Correlation
The correlation between BIL and AOR is -0.10, 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 | -0.10 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.07 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.00 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.01 |
Correlation (All Time) Calculated using the full available price history since Nov 12, 2008 | -0.01 |
The correlation between BIL and AOR shifts across timeframes, from -0.10 (1 year) to 0.01 (10 years), reflecting how their relationship changes across market environments.
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Return for Risk
BIL vs. AOR — Risk / Return Rank
BIL
AOR
BIL vs. AOR - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) and iShares Core 60/40 Balanced Allocation ETF (AOR). 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.
| BIL | AOR | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +17.66 | ||
| Sortino ratioReturn per unit of downside risk | +171.88 | ||
| Omega ratioGain probability vs. loss probability | 88.16 | 1.37 | +86.79 |
| Calmar ratioReturn relative to maximum drawdown | 356.40 | 2.58 | +353.81 |
| Martin ratioReturn relative to average drawdown | 2,826.06 | 11.20 | +2,814.85 |
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
| BIL | AOR | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 19.64 | 1.98 | +17.66 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 13.23 | 0.63 | +12.60 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 8.57 | 0.78 | +7.79 |
Sharpe Ratio (All Time)Calculated using the full available price history | 2.78 | 0.68 | +2.10 |
Drawdowns
BIL vs. AOR - Drawdown Comparison
The maximum BIL drawdown since its inception was -0.78%, smaller than the maximum AOR drawdown of -24.44%. Use the drawdown chart below to compare losses from any high point for BIL and AOR.
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Drawdown Indicators
| BIL | AOR | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -0.78% | -24.44% | +23.66% |
Max Drawdown (1Y)Largest decline over 1 year | -0.01% | -6.64% | +6.63% |
Max Drawdown (3Y)Largest decline over 3 years | -0.01% | -9.77% | +9.76% |
Max Drawdown (5Y)Largest decline over 5 years | -0.09% | -21.72% | +21.63% |
Max Drawdown (10Y)Largest decline over 10 years | -0.21% | -22.95% | +22.74% |
Current DrawdownCurrent decline from peak | 0.00% | -1.98% | +1.98% |
Average DrawdownAverage peak-to-trough decline | -0.26% | -3.47% | +3.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.00% | 1.53% | -1.53% |
Volatility
BIL vs. AOR - Volatility Comparison
The current volatility for SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) is 0.06%, while iShares Core 60/40 Balanced Allocation ETF (AOR) has a volatility of 3.07%. This indicates that BIL experiences smaller price fluctuations and is considered to be less risky than AOR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BIL | AOR | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.06% | 3.07% | -3.01% |
Volatility (6M)Calculated over the trailing 6-month period | 0.14% | 7.11% | -6.97% |
Volatility (1Y)Calculated over the trailing 1-year period | 0.20% | 8.67% | -8.47% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 0.26% | 10.59% | -10.33% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 0.26% | 10.69% | -10.43% |
BIL vs. AOR - Expense Ratio Comparison
BIL has a 0.14% expense ratio, which is lower than AOR's 0.15% 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
BIL vs. AOR - Dividend Comparison
BIL's dividend yield for the trailing twelve months is around 3.86%, more than AOR's 2.51% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AOR iShares Core 60/40 Balanced Allocation ETF | 2.51% | 2.55% | 2.66% | 2.50% | 2.12% | 1.64% | 1.89% | 2.56% | 2.49% | 4.51% | 2.16% | 2.12% |
BIL SPDR Bloomberg 1-3 Month T-Bill ETF | 3.86% | 4.13% | 5.03% | 4.92% | 1.35% | 0.00% | 0.30% | 2.05% | 1.66% | 0.68% | 0.07% | 0.00% |
Frequently Asked Questions
BIL and AOR have a correlation of -0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AOR has higher volatility (3.07%) compared to BIL (0.06%). In terms of maximum drawdown, BIL dropped -0.78% vs AOR's -24.44%.
On 10-year performance, AOR leads with 8.29% vs 2.19% for BIL. On fees, BIL is cheaper at 0.14% per year. On volatility, BIL has been the lower-risk option at 0.06%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, AOR has performed better with a 8.29% return vs 2.19%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
BIL is cheaper with a 0.14% expense ratio, compared with 0.15% for AOR.
BIL has the higher dividend yield at 3.86%, compared with 2.51% for AOR.
BIL is categorized as Government Bonds, while AOR is Diversified Portfolio. BIL tracks Bloomberg 1-3 Month U.S. Treasury Bill Index, while AOR tracks S&P Target Risk Growth Index. They also come from different issuers: State Street and iShares. Their fees differ too: 0.14% for BIL and 0.15% for AOR.
BIL currently has the higher Sharpe Ratio (19.64 vs 1.98), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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