COII vs. CAOS

Last updated Jul 16, 2026

COII (REX COIN Growth & Income ETF) and CAOS (Alpha Architect Tail Risk ETF) are both exchange-traded funds - COII is a Derivative Income fund actively managed by REX Shares, while CAOS is a Options Trading fund actively managed by Alpha Architect. Both are actively managed. Over the past year, COII returned -68.31% vs 2.02% for CAOS. At a correlation of -0.22, they often move in opposite directions. COII charges 0.99%/yr vs 0.63%/yr for CAOS.

Performance

COII vs. CAOS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in REX COIN Growth & Income ETF (COII) and Alpha Architect Tail Risk ETF (CAOS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COII achieves a -40.76% return, which is significantly lower than CAOS's 0.84% return.

COII

• 1D: 0.00%
• 1M: 0.00%
• 6M: -47.26%
• YTD: -40.76%
• 1Y: -68.31%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CAOS

• 1D: 0.06%
• 1M: 0.12%
• 6M: 0.30%
• YTD: 0.84%
• 1Y: 2.02%
• 3Y*: 3.63%
• 5Y*: —
• 10Y*: —

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

COII vs. CAOS - Yearly Performance Comparison

	2026 (YTD)	2025
COII REX COIN Growth & Income ETF	-40.76%	-26.88%
CAOS Alpha Architect Tail Risk ETF	0.84%	1.05%

Correlation

The correlation between COII and CAOS is -0.22, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.22
Correlation (All Time) Calculated using the full available price history since Jun 4, 2025	-0.22

Return for Risk

COII vs. CAOS — Risk / Return Rank

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

COII

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

CAOS

CAOS Risk / Return Rank: 53
CAOS Sharpe Ratio Rank: 46
CAOS Sortino Ratio Rank: 52
CAOS Omega Ratio Rank: 53
CAOS Calmar Ratio Rank: 67
CAOS Martin Ratio Rank: 45

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.

COII vs. CAOS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX COIN Growth & Income ETF (COII) 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.

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.

	COII	CAOS	Difference
Sharpe ratio: Return per unit of total volatility	-0.98	1.31	-2.29
Sortino ratio: Return per unit of downside risk	-1.62	2.09	-3.71
Omega ratio: Gain probability vs. loss probability	0.80	1.27	-0.47
Calmar ratio: Return relative to maximum drawdown	-0.90	2.68	-3.58
Martin ratio: Return relative to average drawdown	-1.33	6.06	-7.39

COII vs. CAOS - Sharpe Ratio Comparison

The current COII Sharpe Ratio is -0.98, which is lower than the CAOS Sharpe Ratio of 1.31. The chart below compares the historical Sharpe Ratios of COII and CAOS, 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

COII vs. CAOS - Drawdown Comparison

The maximum COII drawdown since its inception was -72.22%, which is greater than CAOS's maximum drawdown of -3.89%. Use the drawdown chart below to compare losses from any high point for COII and CAOS.

Drawdown Indicators

	COII	CAOS	Difference
Max Drawdown Largest peak-to-trough decline	-72.22%	-3.89%	-68.33%
Max Drawdown (1Y) Largest decline over 1 year	-72.22%	-0.76%	-71.46%
Max Drawdown (3Y) Largest decline over 3 years	—	-3.60%	—
Current Drawdown Current decline from peak	-70.51%	-1.04%	-69.47%
Average Drawdown Average peak-to-trough decline	-41.08%	-0.92%	-40.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	48.77%	0.33%	+48.44%

Volatility

COII vs. CAOS - Volatility Comparison

REX COIN Growth & Income ETF (COII) has a higher volatility of 14.58% compared to Alpha Architect Tail Risk ETF (CAOS) at 0.48%. This indicates that COII's price experiences larger fluctuations and is considered to be riskier than CAOS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COII	CAOS	Difference
Volatility (1M) Calculated over the trailing 1-month period	14.58%	0.48%	+14.10%
Volatility (6M) Calculated over the trailing 6-month period	51.81%	1.09%	+50.72%
Volatility (1Y) Calculated over the trailing 1-year period	66.59%	1.56%	+65.03%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	66.93%	4.20%	+62.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	66.93%	4.20%	+62.73%

COII vs. CAOS - Expense Ratio Comparison

COII has a 0.99% expense ratio, which is higher than CAOS's 0.63% expense ratio.

Dividends

COII vs. CAOS - Dividend Comparison

Neither COII nor CAOS has paid dividends to shareholders.

Position	TTM	2025
CAOS Alpha Architect Tail Risk ETF	0.00%	0.00%
COII REX COIN Growth & Income ETF	75.93%	41.52%

Frequently Asked Questions

Can I hold both COII and CAOS in my portfolio?

COII and CAOS have a correlation of -0.22, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COII or CAOS?

COII has higher volatility (14.58%) compared to CAOS (0.48%). In terms of maximum drawdown, COII dropped -72.22% vs CAOS's -3.89%.

Which ETF is better, COII or CAOS?

On 1-year performance, CAOS leads with 2.02% vs -68.31% for COII. On fees, CAOS is cheaper at 0.63% per year. On volatility, CAOS has been the lower-risk option at 0.48%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, COII or CAOS?

Over the 1-year period, CAOS has performed better with a 2.02% return vs -68.31%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, COII or CAOS?

CAOS is cheaper with a 0.63% expense ratio, compared with 0.99% for COII.

Which ETF pays a higher dividend yield, COII or CAOS?

COII has the higher dividend yield at 75.93%, compared with 0.00% for CAOS.

What is the main difference between COII and CAOS?

COII is categorized as Derivative Income, while CAOS is Options Trading. They also come from different issuers: REX Shares and Alpha Architect. Their fees differ too: 0.99% for COII and 0.63% for CAOS.

Which has better risk-adjusted returns?

CAOS currently has the higher Sharpe Ratio (1.31 vs -0.98), 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.