ESK vs. COII

Last updated Jul 11, 2026

ESK (REX-Osprey ETH + Staking ETF) and COII (REX COIN Growth & Income ETF) are both exchange-traded funds - ESK is a Cryptocurrency fund actively managed by REX Shares, while COII is a Derivative Income fund actively managed by REX Shares. Both are actively managed. A 0.78 correlation means they provide meaningful diversification when combined. ESK charges 0.75%/yr vs 0.99%/yr for COII.

Performance

ESK vs. COII - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in REX-Osprey ETH + Staking ETF (ESK) and REX COIN Growth & Income ETF (COII). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ESK achieves a -44.38% return, which is significantly lower than COII's -40.76% return.

ESK

• 1D: 0.00%
• 1M: 0.00%
• 6M: -46.16%
• YTD: -44.38%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

COII

• 1D: 0.00%
• 1M: 0.00%
• 6M: -43.88%
• YTD: -40.76%
• 1Y: -68.07%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

ESK vs. COII - Yearly Performance Comparison

	2026 (YTD)	2025
ESK REX-Osprey ETH + Staking ETF	-44.38%	-23.95%
COII REX COIN Growth & Income ETF	-40.76%	-35.00%

Correlation

The correlation between ESK and COII is 0.78, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (All Time) Calculated using the full available price history since Sep 25, 2025	0.78

Return for Risk

ESK vs. COII - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX-Osprey ETH + Staking ETF (ESK) and REX COIN Growth & Income ETF (COII). 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.

	ESK	COII	Difference
Sharpe ratio: Return per unit of total volatility	—	-0.98	—
Sortino ratio: Return per unit of downside risk	—	-1.62	—
Omega ratio: Gain probability vs. loss probability	—	0.80	—
Calmar ratio: Return relative to maximum drawdown	—	-0.90	—
Martin ratio: Return relative to average drawdown	—	-1.33	—

Drawdowns

ESK vs. COII - Drawdown Comparison

The maximum ESK drawdown since its inception was -66.25%, smaller than the maximum COII drawdown of -72.22%. Use the drawdown chart below to compare losses from any high point for ESK and COII.

Drawdown Indicators

	ESK	COII	Difference
Max Drawdown Largest peak-to-trough decline	-66.25%	-72.22%	+5.97%
Max Drawdown (1Y) Largest decline over 1 year	—	-72.22%	—
Current Drawdown Current decline from peak	-64.43%	-70.51%	+6.08%
Average Drawdown Average peak-to-trough decline	-41.77%	-41.08%	-0.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	48.77%	—

Volatility

Volatility by Period

	ESK	COII	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	14.58%	—
Volatility (6M) Calculated over the trailing 6-month period	—	51.81%	—
Volatility (1Y) Calculated over the trailing 1-year period	66.47%	66.59%	-0.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	66.47%	66.93%	-0.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	66.47%	66.93%	-0.46%

ESK vs. COII - Expense Ratio Comparison

ESK has a 0.75% expense ratio, which is lower than COII's 0.99% expense ratio.

Dividends

ESK vs. COII - Dividend Comparison

ESK's dividend yield for the trailing twelve months is around 1.06%, while COII has not paid dividends to shareholders.

Position	TTM	2025
COII REX COIN Growth & Income ETF	80.49%	41.52%
ESK REX-Osprey ETH + Staking ETF	1.06%	0.30%

Frequently Asked Questions

Can I hold both ESK and COII in my portfolio?

ESK and COII have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, ESK or COII?

On fees, ESK is cheaper at 0.75% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, ESK or COII?

ESK is cheaper with a 0.75% expense ratio, compared with 0.99% for COII.

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

COII has the higher dividend yield at 80.49%, compared with 1.06% for ESK.

What is the main difference between ESK and COII?

ESK is categorized as Cryptocurrency, while COII is Derivative Income. Their fees differ too: 0.75% for ESK and 0.99% for COII.