DUOL vs. BIL

Last updated Aug 5, 2026

DUOL (Duolingo, Inc.) is a stock, while BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) is Government Bonds fund tracking the Bloomberg 1-3 Month U.S. Treasury Bill Index. Over the past 5 years, DUOL returned -1.16%/yr vs 3.54%/yr for BIL. Their -0.02 correlation means they have often moved in opposite directions in the past.

Performance

DUOL vs. BIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Duolingo, Inc. (DUOL) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DUOL achieves a -21.51% return, which is significantly lower than BIL's 2.10% return.

DUOL

• 1D: 1.44%
• 1M: 9.53%
• 6M: 14.52%
• YTD: -21.51%
• 1Y: -60.91%
• 3Y*: 0.09%
• 5Y*: -1.16%
• 10Y*: —
• ALL TIME*: -0.52%

BIL

• 1D: 0.00%
• 1M: 0.28%
• 6M: 1.78%
• YTD: 2.10%
• 1Y: 3.76%
• 3Y*: 4.54%
• 5Y*: 3.54%
• 10Y*: 2.24%
• ALL TIME*: 1.37%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	$968.84M	$901.78M	$924.99M
DUOL Duolingo, Inc.	$152.29M	$137.41M	$163.12M

DUOL vs. BIL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
DUOL Duolingo, Inc.	-21.51%	-45.87%	42.93%	218.92%	-32.97%	-24.96%
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	2.10%	4.15%	5.19%	4.94%	1.40%	-0.03%

Correlation

The correlation between DUOL and BIL is -0.05, meaning there was essentially no consistent relationship between their historical price movements. Each responded to its own set of market drivers.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	-0.05
Correlation (3Y) Balances recent behavior with more history.	-0.04
Correlation (5Y) Shows whether the relationship held over a longer period.	-0.02
Correlation (All Time) Calculated using the full available price history since Jul 28, 2021	-0.02

Return for Risk

DUOL vs. BIL — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

DUOL

DUOL Risk / Return Rank: 10
DUOL Sharpe Ratio Rank: 5
DUOL Sortino Ratio Rank: 6
DUOL Omega Ratio Rank: 7
DUOL Calmar Ratio Rank: 11
DUOL Martin Ratio Rank: 18

BIL

BIL Risk / Return Rank: 100
BIL Sharpe Ratio Rank: 100
BIL Sortino Ratio Rank: 100
BIL Omega Ratio Rank: 100
BIL Calmar Ratio Rank: 100
BIL Martin Ratio Rank: 100

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

DUOL vs. BIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Duolingo, Inc. (DUOL) 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.

	DUOL	BIL	Difference
Sharpe ratio: Return per unit of total volatility	-0.94	19.07	-20.00
Sortino ratio: Return per unit of downside risk	-1.42	151.51	-152.94
Omega ratio: Gain probability vs. loss probability	0.83	68.62	-67.80
Calmar ratio: Return relative to maximum drawdown	-0.79	345.49	-346.28
Martin ratio: Return relative to average drawdown	-1.05	2,450.06	-2,451.11

DUOL vs. BIL - Sharpe Ratio Comparison

The current DUOL Sharpe Ratio is -0.94, which is lower than the BIL Sharpe Ratio of 19.07. The chart below compares the historical Sharpe Ratios of DUOL and BIL, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

DUOL vs. BIL - Drawdown Comparison

The maximum DUOL drawdown since its inception was -83.35%, which is greater than BIL's maximum drawdown of -0.78%. Use the drawdown chart below to compare losses from any high point for DUOL and BIL.

Drawdown Indicators

	DUOL	BIL	Difference
Max Drawdown Largest peak-to-trough decline	-83.35%	-0.78%	-82.57%
Max Drawdown (1Y) Largest decline over 1 year	-76.96%	-0.01%	-76.95%
Max Drawdown (3Y) Largest decline over 3 years	-83.35%	-0.01%	-83.34%
Max Drawdown (5Y) Largest decline over 5 years	-83.35%	-0.08%	-83.27%
Max Drawdown (10Y) Largest decline over 10 years	—	-0.21%	—
Current Drawdown Current decline from peak	-74.52%	0.00%	-74.52%
Average Drawdown Average peak-to-trough decline	-36.88%	-0.26%	-36.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	58.13%	0.00%	+58.13%

Volatility

DUOL vs. BIL - Volatility Comparison

Duolingo, Inc. (DUOL) has a higher volatility of 17.71% compared to SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) at 0.05%. This indicates that DUOL'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.

Volatility by Period

	DUOL	BIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	17.71%	0.05%	+17.66%
Volatility (6M) Calculated over the trailing 6-month period	43.64%	0.14%	+43.50%
Volatility (1Y) Calculated over the trailing 1-year period	65.39%	0.20%	+65.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	66.15%	0.26%	+65.89%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	66.06%	0.26%	+65.80%

Dividends

DUOL vs. BIL - Dividend Comparison

DUOL has not paid dividends to shareholders, while BIL's dividend yield for the trailing twelve months is around 3.77%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	3.77%	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

Can I hold both DUOL and BIL in my portfolio?

DUOL and BIL have a correlation of -0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, DUOL or BIL?

DUOL has higher volatility (17.71%) compared to BIL (0.05%). In terms of maximum drawdown, DUOL dropped -83.35% vs BIL's -0.78%.

Which has better risk-adjusted returns?

BIL currently has the higher Sharpe Ratio (19.07 vs -0.94), 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.