VBIL vs. CAOS

Last updated Apr 1, 2026

Compare and contrast key facts about Vanguard 0-3 Month Treasury Bill ETF (VBIL) and Alpha Architect Tail Risk ETF (CAOS).

VBIL and CAOS are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. VBIL is a passively managed fund by Vanguard that tracks the performance of the Bloomberg US Treasury Bills 0-3 Months Index. It was launched on Feb 7, 2025. CAOS is an actively managed fund by Alpha Architect. It was launched on Aug 14, 2013.

Performance

VBIL vs. CAOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard 0-3 Month Treasury Bill ETF (VBIL) and Alpha Architect Tail Risk ETF (CAOS). The values are adjusted to include any dividend payments, if applicable.

VBIL vs. CAOS - Yearly Performance Comparison

	2026 (YTD)	2025
VBIL Vanguard 0-3 Month Treasury Bill ETF	0.86%	3.71%
CAOS Alpha Architect Tail Risk ETF	1.10%	2.23%

Returns By Period

In the year-to-date period, VBIL achieves a 0.86% return, which is significantly lower than CAOS's 1.10% return.

VBIL

• 1D: 0.03%
• 1M: 0.30%
• YTD: 0.86%
• 6M: 1.88%
• 1Y: 4.04%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CAOS

• 1D: 0.07%
• 1M: 0.43%
• YTD: 1.10%
• 6M: 1.37%
• 1Y: 3.19%
• 3Y*: 5.46%
• 5Y*: —
• 10Y*: —

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

VBIL vs. CAOS - Expense Ratio Comparison

VBIL has a 0.07% expense ratio, which is lower than CAOS's 0.63% expense ratio.

CAOS

Alpha Architect Tail Risk ETF

VBIL

Vanguard 0-3 Month Treasury Bill ETF

Return for Risk

VBIL vs. CAOS — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

VBIL

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

CAOS

CAOS Risk / Return Rank: 41
CAOS Sharpe Ratio Rank: 39
CAOS Sortino Ratio Rank: 36
CAOS Omega Ratio Rank: 72
CAOS Calmar Ratio Rank: 35
CAOS Martin Ratio Rank: 23

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

VBIL vs. CAOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard 0-3 Month Treasury Bill ETF (VBIL) and Alpha Architect Tail Risk ETF (CAOS). 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.

	VBIL	CAOS	Difference
Sharpe ratio Return per unit of total volatility	12.70	0.69	+12.01
Sortino ratio Return per unit of downside risk	29.61	0.97	+28.64
Omega ratio Gain probability vs. loss probability	12.58	1.26	+11.33
Calmar ratio Return relative to maximum drawdown	44.01	0.83	+43.18
Martin ratio Return relative to average drawdown	379.94	1.38	+378.57
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VBIL vs. CAOS - Sharpe Ratio Comparison

The current VBIL Sharpe Ratio is 12.70, which is higher than the CAOS Sharpe Ratio of 0.69. The chart below compares the historical Sharpe Ratios of VBIL and CAOS, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	VBIL	CAOS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	12.70	0.69	+12.01
Sharpe Ratio (All Time) Calculated using the full available price history	13.08	1.27	+11.81

Correlation

The correlation between VBIL and CAOS is 0.10, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

VBIL vs. CAOS - Dividend Comparison

VBIL's dividend yield for the trailing twelve months is around 3.67%, while CAOS has not paid dividends to shareholders.

	TTM	2025
VBIL Vanguard 0-3 Month Treasury Bill ETF	3.67%	3.12%
CAOS Alpha Architect Tail Risk ETF	0.00%	0.00%

Drawdowns

VBIL vs. CAOS - Drawdown Comparison

The maximum VBIL drawdown since its inception was -0.09%, smaller than the maximum CAOS drawdown of -3.60%. Use the drawdown chart below to compare losses from any high point for VBIL and CAOS.

Drawdown Indicators

	VBIL	CAOS	Difference
Max Drawdown Largest peak-to-trough decline	-0.09%	-3.60%	+3.51%
Max Drawdown (1Y) Largest decline over 1 year	-0.09%	-3.60%	+3.51%
Current Drawdown Current decline from peak	0.00%	-0.80%	+0.80%
Average Drawdown Average peak-to-trough decline	0.00%	-0.90%	+0.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	2.18%	-2.17%

Volatility

VBIL vs. CAOS - Volatility Comparison

The current volatility for Vanguard 0-3 Month Treasury Bill ETF (VBIL) is 0.07%, while Alpha Architect Tail Risk ETF (CAOS) has a volatility of 0.74%. This indicates that VBIL experiences smaller price fluctuations and is considered to be less risky than CAOS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VBIL	CAOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.07%	0.74%	-0.67%
Volatility (6M) Calculated over the trailing 6-month period	0.16%	1.30%	-1.14%
Volatility (1Y) Calculated over the trailing 1-year period	0.32%	4.68%	-4.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.31%	4.37%	-4.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.31%	4.37%	-4.06%