BIL vs. DUOL
BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) is Government Bonds fund tracking the Bloomberg 1-3 Month U.S. Treasury Bill Index, while DUOL (Duolingo, Inc.) is a stock. Over the past 3 years, BIL returned 4.63%/yr vs -8.39%/yr for DUOL. At a correlation of -0.03, they often move in opposite directions.
Performance
BIL vs. DUOL - Performance Comparison
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Returns By Period
In the year-to-date period, BIL achieves a 1.60% return, which is significantly higher than DUOL's -30.13% return.
BIL
- 1D
- 0.03%
- 1M
- 0.27%
- YTD
- 1.60%
- 6M
- 1.76%
- 1Y
- 3.85%
- 3Y*
- 4.63%
- 5Y*
- 3.43%
- 10Y*
- 2.20%
DUOL
- 1D
- -0.98%
- 1M
- 9.43%
- YTD
- -30.13%
- 6M
- -37.52%
- 1Y
- -74.37%
- 3Y*
- -8.39%
- 5Y*
- —
- 10Y*
- —
BIL vs. DUOL - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | |
|---|---|---|---|---|---|---|
BIL SPDR Bloomberg 1-3 Month T-Bill ETF | 1.60% | 4.15% | 5.19% | 4.94% | 1.40% | -0.03% |
DUOL Duolingo, Inc. | -30.13% | -45.87% | 42.93% | 218.92% | -32.97% | -24.96% |
Correlation
The correlation between BIL and DUOL is -0.06, 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 | -0.06 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.06 |
Correlation (All Time) Calculated using the full available price history since Jul 28, 2021 | -0.03 |
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Return for Risk
BIL vs. DUOL — Risk / Return Rank
BIL
DUOL
BIL vs. DUOL - 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 Duolingo, Inc. (DUOL). 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.
| BIL | DUOL | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +20.82 | ||
| Sortino ratioReturn per unit of downside risk | +177.48 | ||
| Omega ratioGain probability vs. loss probability | 88.41 | 0.72 | +87.69 |
| Calmar ratioReturn relative to maximum drawdown | 357.44 | -0.92 | +358.36 |
| Martin ratioReturn relative to average drawdown | 2,834.34 | -1.26 | +2,835.59 |
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Drawdowns
BIL vs. DUOL - Drawdown Comparison
The maximum BIL drawdown since its inception was -0.78%, smaller than the maximum DUOL drawdown of -83.35%. Use the drawdown chart below to compare losses from any high point for BIL and DUOL.
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Drawdown Indicators
| BIL | DUOL | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -0.78% | -83.35% | +82.57% |
Max Drawdown (1Y)Largest decline over 1 year | -0.01% | -81.19% | +81.18% |
Max Drawdown (3Y)Largest decline over 3 years | -0.01% | -83.35% | +83.34% |
Max Drawdown (5Y)Largest decline over 5 years | -0.09% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -0.21% | — | — |
Current DrawdownCurrent decline from peak | 0.00% | -77.32% | +77.32% |
Average DrawdownAverage peak-to-trough decline | -0.26% | -35.76% | +35.50% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.00% | 59.48% | -59.48% |
Volatility
BIL vs. DUOL - Volatility Comparison
The current volatility for SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) is 0.06%, while Duolingo, Inc. (DUOL) has a volatility of 15.67%. This indicates that BIL experiences smaller price fluctuations and is considered to be less risky than DUOL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BIL | DUOL | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.06% | 15.67% | -15.61% |
Volatility (6M)Calculated over the trailing 6-month period | 0.14% | 40.94% | -40.80% |
Volatility (1Y)Calculated over the trailing 1-year period | 0.20% | 62.97% | -62.77% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 0.26% | 66.21% | -65.95% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 0.26% | 66.21% | -65.95% |
Dividends
BIL vs. DUOL - Dividend Comparison
BIL's dividend yield for the trailing twelve months is around 3.86%, while DUOL has not paid dividends to shareholders.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
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% |
DUOL Duolingo, Inc. | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
BIL and DUOL have a correlation of -0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
DUOL has higher volatility (15.67%) compared to BIL (0.06%). In terms of maximum drawdown, BIL dropped -0.78% vs DUOL's -83.35%.
BIL currently has the higher Sharpe Ratio (19.63 vs -1.19), 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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