IBTG vs. BIL
IBTG (iShares iBonds Dec 2026 Term Treasury ETF) and BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) are both Government Bonds funds - IBTG tracks the ICE 2026 Maturity US Treasury Index while BIL tracks the Bloomberg 1-3 Month U.S. Treasury Bill Index. Both are passively managed. Over the past 5 years, IBTG returned 0.91%/yr vs 3.45%/yr for BIL. At a 0.09 correlation, their price movements are largely independent. IBTG charges 0.07%/yr vs 0.14%/yr for BIL.
Performance
IBTG vs. BIL - Performance Comparison
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Returns By Period
The year-to-date returns for both investments are quite close, with IBTG having a 1.62% return and BIL slightly higher at 1.67%.
IBTG
- 1D
- 0.02%
- 1M
- 0.23%
- YTD
- 1.62%
- 6M
- 1.66%
- 1Y
- 3.96%
- 3Y*
- 4.28%
- 5Y*
- 0.91%
- 10Y*
- —
BIL
- 1D
- 0.01%
- 1M
- 0.28%
- YTD
- 1.67%
- 6M
- 1.76%
- 1Y
- 3.84%
- 3Y*
- 4.60%
- 5Y*
- 3.45%
- 10Y*
- 2.20%
IBTG vs. BIL - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | |
|---|---|---|---|---|---|---|---|
IBTG iShares iBonds Dec 2026 Term Treasury ETF | 1.62% | 4.40% | 3.97% | 4.34% | -8.18% | -3.04% | 4.23% |
BIL SPDR Bloomberg 1-3 Month T-Bill ETF | 1.67% | 4.15% | 5.19% | 4.94% | 1.40% | -0.10% | 0.15% |
Correlation
The correlation between IBTG and BIL is 0.20, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.20 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.13 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.13 |
Correlation (All Time) Calculated using the full available price history since Feb 28, 2020 | 0.09 |
The correlation between IBTG and BIL shifts across timeframes, from 0.09 (all time) to 0.20 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
IBTG vs. BIL — Risk / Return Rank
IBTG
BIL
IBTG vs. BIL - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2026 Term Treasury ETF (IBTG) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). 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.
| IBTG | BIL | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -11.42 | ||
| Sortino ratioReturn per unit of downside risk | -153.19 | ||
| Omega ratioGain probability vs. loss probability | 4.25 | 87.16 | -82.91 |
| Calmar ratioReturn relative to maximum drawdown | 60.79 | 352.24 | -291.45 |
| Martin ratioReturn relative to average drawdown | 246.24 | 2,793.11 | -2,546.87 |
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Drawdowns
IBTG vs. BIL - Drawdown Comparison
The maximum IBTG drawdown since its inception was -13.62%, which is greater than BIL's maximum drawdown of -0.78%. Use the drawdown chart below to compare losses from any high point for IBTG and BIL.
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Drawdown Indicators
| IBTG | BIL | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -13.62% | -0.78% | -12.84% |
Max Drawdown (1Y)Largest decline over 1 year | -0.07% | -0.01% | -0.06% |
Max Drawdown (3Y)Largest decline over 3 years | -1.11% | -0.01% | -1.10% |
Max Drawdown (5Y)Largest decline over 5 years | -12.31% | -0.09% | -12.22% |
Max Drawdown (10Y)Largest decline over 10 years | — | -0.21% | — |
Current DrawdownCurrent decline from peak | 0.00% | 0.00% | 0.00% |
Average DrawdownAverage peak-to-trough decline | -4.85% | -0.26% | -4.59% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.02% | 0.00% | +0.02% |
Volatility
IBTG vs. BIL - Volatility Comparison
iShares iBonds Dec 2026 Term Treasury ETF (IBTG) has a higher volatility of 0.12% compared to SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) at 0.07%. This indicates that IBTG's price experiences larger fluctuations and is considered to be riskier than BIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IBTG | BIL | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.12% | 0.07% | +0.05% |
Volatility (6M)Calculated over the trailing 6-month period | 0.30% | 0.14% | +0.16% |
Volatility (1Y)Calculated over the trailing 1-year period | 0.50% | 0.20% | +0.30% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.25% | 0.26% | +2.99% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.44% | 0.26% | +3.18% |
IBTG vs. BIL - Expense Ratio Comparison
IBTG has a 0.07% expense ratio, which is lower than BIL's 0.14% 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
IBTG vs. BIL - Dividend Comparison
IBTG's dividend yield for the trailing twelve months is around 3.95%, more than BIL's 3.85% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
BIL SPDR Bloomberg 1-3 Month T-Bill ETF | 3.85% | 4.13% | 5.03% | 4.92% | 1.35% | 0.00% | 0.30% | 2.05% | 1.66% | 0.68% | 0.07% |
IBTG iShares iBonds Dec 2026 Term Treasury ETF | 3.95% | 4.03% | 4.08% | 3.61% | 2.06% | 0.66% | 0.53% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
IBTG and BIL have a correlation of 0.20, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IBTG has higher volatility (0.12%) compared to BIL (0.07%). In terms of maximum drawdown, IBTG dropped -13.62% vs BIL's -0.78%.
On 5-year performance, BIL leads with 3.45% vs 0.91% for IBTG. On fees, IBTG is cheaper at 0.07% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, BIL has performed better with a 3.45% return vs 0.91%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IBTG is cheaper with a 0.07% expense ratio, compared with 0.14% for BIL.
IBTG has the higher dividend yield at 3.95%, compared with 3.85% for BIL.
IBTG tracks ICE 2026 Maturity US Treasury Index, while BIL tracks Bloomberg 1-3 Month U.S. Treasury Bill Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.07% for IBTG and 0.14% for BIL.
BIL currently has the higher Sharpe Ratio (19.32 vs 7.90), 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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