COII vs. MARB

Last updated Jun 4, 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. At a correlation of -0.08, 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 -37.80% return, which is significantly lower than MARB's 1.26% return.

COII

• 1D: -7.35%
• 1M: -19.57%
• YTD: -37.80%
• 6M: -48.84%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

MARB

• 1D: 0.05%
• 1M: 0.22%
• YTD: 1.26%
• 6M: 1.42%
• 1Y: 6.18%
• 3Y*: 4.29%
• 5Y*: 2.64%
• 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	-37.80%	-25.89%
MARB First Trust Merger Arbitrage ETF	1.26%	4.94%

Correlation

The correlation between COII and MARB is -0.08, 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 (All Time) Calculated using the full available price history since Jun 5, 2025	-0.08

Return for Risk

COII vs. MARB — Risk / Return Rank

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

MARB

MARB Risk / Return Rank: 52
MARB Sharpe Ratio Rank: 32
MARB Sortino Ratio Rank: 34
MARB Omega Ratio Rank: 51
MARB Calmar Ratio Rank: 52
MARB Martin Ratio Rank: 90

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.

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

Sharpe Ratios by Period

	COII	MARB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	1.17	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.62	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.79	0.36	-1.15

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	—	-2.43%	—
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	-69.04%	-0.00%	-69.04%
Average Drawdown Average peak-to-trough decline	-39.11%	-1.40%	-37.71%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.30%	—

Volatility

Volatility by Period

	COII	MARB	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.47%	—
Volatility (6M) Calculated over the trailing 6-month period	—	2.18%	—
Volatility (1Y) Calculated over the trailing 1-year period	68.48%	5.31%	+63.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	68.48%	4.27%	+64.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	68.48%	5.60%	+62.88%

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 92.44%, more than MARB's 2.98% yield.

Position	TTM	2025	2024	2023	2022
COII REX COIN Growth & Income ETF	92.44%	41.52%	0.00%	0.00%	0.00%
MARB First Trust Merger Arbitrage ETF	2.98%	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 -0.08, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, COII or MARB?

On fees, COII is cheaper at 0.99% per year. The better choice depends on whether you care most about return, fees, risk, or income.

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 92.44%, compared with 2.98% 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.