COII vs. MARB

Last updated Jun 24, 2026

COII (REX COIN Growth & Income ETF) and MARB (First Trust Merger Arbitrage ETF) are both exchange-traded funds - COII is a Derivative Income fund actively managed by REX Shares, while MARB is a Long-Short fund actively managed by First Trust. Both are actively managed. Over the past year, COII returned -61.20% vs 6.56% for MARB. At a correlation of -0.07, they often move in opposite directions. COII charges 0.99%/yr vs 2.30%/yr for MARB.

Performance

COII vs. MARB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in REX COIN Growth & Income ETF (COII) and First Trust Merger Arbitrage ETF (MARB). 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 MARB's 1.77% return.

COII

• 1D: 0.00%
• 1M: -17.01%
• YTD: -40.76%
• 6M: -44.80%
• 1Y: -61.20%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MARB

• 1D: 0.00%
• 1M: 0.57%
• YTD: 1.77%
• 6M: 1.91%
• 1Y: 6.56%
• 3Y*: 4.36%
• 5Y*: 3.02%
• 10Y*: —

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

COII vs. MARB - Yearly Performance Comparison

	2026 (YTD)	2025
COII REX COIN Growth & Income ETF	-40.76%	-26.88%
MARB First Trust Merger Arbitrage ETF	1.77%	4.86%

Correlation

The correlation between COII and MARB is -0.05, 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	-0.05
Correlation (All Time) Calculated using the full available price history since Jun 4, 2025	-0.07

Return for Risk

COII vs. MARB — Risk / Return Rank

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

COII

COII Risk / Return Rank: 2
COII Sharpe Ratio Rank: 2
COII Sortino Ratio Rank: 2
COII Omega Ratio Rank: 1
COII Calmar Ratio Rank: 2
COII Martin Ratio Rank: 2

MARB

MARB Risk / Return Rank: 60
MARB Sharpe Ratio Rank: 39
MARB Sortino Ratio Rank: 41
MARB Omega Ratio Rank: 66
MARB Calmar Ratio Rank: 62
MARB Martin Ratio Rank: 94

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. MARB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX COIN Growth & Income ETF (COII) and First Trust Merger Arbitrage ETF (MARB). 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	MARB	Difference
Sharpe ratio: Return per unit of total volatility	-0.91	1.23	-2.14
Sortino ratio: Return per unit of downside risk	-1.41	1.91	-3.32
Omega ratio: Gain probability vs. loss probability	0.83	1.35	-0.52
Calmar ratio: Return relative to maximum drawdown	-0.85	2.71	-3.56
Martin ratio: Return relative to average drawdown	-1.28	22.44	-23.72

COII vs. MARB - Sharpe Ratio Comparison

The current COII Sharpe Ratio is -0.91, which is lower than the MARB Sharpe Ratio of 1.23. The chart below compares the historical Sharpe Ratios of COII and MARB, 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. MARB - Drawdown Comparison

The maximum COII drawdown since its inception was -72.22%, which is greater than MARB's maximum drawdown of -11.99%. Use the drawdown chart below to compare losses from any high point for COII and MARB.

Drawdown Indicators

	COII	MARB	Difference
Max Drawdown Largest peak-to-trough decline	-72.22%	-11.99%	-60.23%
Max Drawdown (1Y) Largest decline over 1 year	-72.22%	-2.43%	-69.79%
Max Drawdown (3Y) Largest decline over 3 years	—	-3.67%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-3.67%	—
Current Drawdown Current decline from peak	-70.51%	0.00%	-70.51%
Average Drawdown Average peak-to-trough decline	-40.53%	-1.39%	-39.14%
Ulcer Index Depth and duration of drawdowns from previous peaks	47.75%	0.29%	+47.46%

Volatility

COII vs. MARB - Volatility Comparison

REX COIN Growth & Income ETF (COII) has a higher volatility of 17.23% compared to First Trust Merger Arbitrage ETF (MARB) at 1.04%. This indicates that COII's price experiences larger fluctuations and is considered to be riskier than MARB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COII	MARB	Difference
Volatility (1M) Calculated over the trailing 1-month period	17.23%	1.04%	+16.19%
Volatility (6M) Calculated over the trailing 6-month period	51.90%	2.35%	+49.55%
Volatility (1Y) Calculated over the trailing 1-year period	67.44%	5.35%	+62.09%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	67.56%	4.28%	+63.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	67.56%	5.59%	+61.97%

COII vs. MARB - Expense Ratio Comparison

COII has a 0.99% expense ratio, which is lower than MARB's 2.30% expense ratio.

Dividends

COII vs. MARB - Dividend Comparison

COII's dividend yield for the trailing twelve months is around 94.11%, more than MARB's 2.96% yield.

Position	TTM	2025	2024	2023	2022
COII REX COIN Growth & Income ETF	88.23%	41.52%	0.00%	0.00%	0.00%
MARB First Trust Merger Arbitrage ETF	2.96%	3.01%	2.11%	2.20%	0.99%

Frequently Asked Questions

Can I hold both COII and MARB in my portfolio?

COII and MARB 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, COII or MARB?

COII has higher volatility (17.23%) compared to MARB (1.04%). In terms of maximum drawdown, COII dropped -72.22% vs MARB's -11.99%.

Which ETF is better, COII or MARB?

On 1-year performance, MARB leads with 6.56% vs -61.20% for COII. On fees, COII is cheaper at 0.99% per year. On volatility, MARB has been the lower-risk option at 1.04%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, COII or MARB?

Over the 1-year period, MARB has performed better with a 6.56% return vs -61.20%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, COII or MARB?

COII is cheaper with a 0.99% expense ratio, compared with 2.30% for MARB.

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

COII has the higher dividend yield at 94.11%, compared with 2.96% for MARB.

What is the main difference between COII and MARB?

COII is categorized as Derivative Income, while MARB is Long-Short. They also come from different issuers: REX Shares and First Trust. Their fees differ too: 0.99% for COII and 2.30% for MARB.

Which has better risk-adjusted returns?

MARB currently has the higher Sharpe Ratio (1.23 vs -0.91), 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.