COII vs. MSTZ

Last updated Jul 16, 2026

COII (REX COIN Growth & Income ETF) and MSTZ (T-REX 2X Inverse MSTR Daily Target ETF) are both exchange-traded funds - COII is a Derivative Income fund actively managed by REX Shares, while MSTZ is a Inverse Equities fund actively managed by REX. Both are actively managed. Over the past year, COII returned -68.31% vs 252.57% for MSTZ. At a correlation of -0.71, they often move in opposite directions. COII charges 0.99%/yr vs 1.05%/yr for MSTZ.

Performance

COII vs. MSTZ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in REX COIN Growth & Income ETF (COII) and T-REX 2X Inverse MSTR Daily Target ETF (MSTZ). 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 MSTZ's -31.95% return.

COII

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

MSTZ

• 1D: -0.09%
• 1M: 46.79%
• 6M: 0.09%
• YTD: -31.95%
• 1Y: 252.57%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

COII vs. MSTZ - Yearly Performance Comparison

	2026 (YTD)	2025
COII REX COIN Growth & Income ETF	-40.76%	-26.88%
MSTZ T-REX 2X Inverse MSTR Daily Target ETF	-31.95%	265.67%

Correlation

The correlation between COII and MSTZ is -0.72, 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	-0.72
Correlation (All Time) Calculated using the full available price history since Jun 4, 2025	-0.71

The correlation between COII and MSTZ has been stable across timeframes, ranging from -0.72 to -0.71 - a consistent structural relationship.

Return for Risk

COII vs. MSTZ — 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.

MSTZ

MSTZ Risk / Return Rank: 61
MSTZ Sharpe Ratio Rank: 65
MSTZ Sortino Ratio Rank: 62
MSTZ Omega Ratio Rank: 64
MSTZ Calmar Ratio Rank: 73
MSTZ Martin Ratio Rank: 43

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. MSTZ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for REX COIN Growth & Income ETF (COII) and T-REX 2X Inverse MSTR Daily Target ETF (MSTZ). 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	MSTZ	Difference
Sharpe ratio: Return per unit of total volatility	-0.98	1.71	-2.69
Sortino ratio: Return per unit of downside risk	-1.62	2.37	-3.98
Omega ratio: Gain probability vs. loss probability	0.80	1.31	-0.51
Calmar ratio: Return relative to maximum drawdown	-0.90	3.00	-3.90
Martin ratio: Return relative to average drawdown	-1.33	5.79	-7.12

COII vs. MSTZ - Sharpe Ratio Comparison

The current COII Sharpe Ratio is -0.98, which is lower than the MSTZ Sharpe Ratio of 1.71. The chart below compares the historical Sharpe Ratios of COII and MSTZ, 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. MSTZ - Drawdown Comparison

The maximum COII drawdown since its inception was -72.22%, smaller than the maximum MSTZ drawdown of -99.38%. Use the drawdown chart below to compare losses from any high point for COII and MSTZ.

Drawdown Indicators

	COII	MSTZ	Difference
Max Drawdown Largest peak-to-trough decline	-72.22%	-99.38%	+27.16%
Max Drawdown (1Y) Largest decline over 1 year	-72.22%	-84.89%	+12.67%
Current Drawdown Current decline from peak	-70.51%	-97.68%	+27.17%
Average Drawdown Average peak-to-trough decline	-41.08%	-94.55%	+53.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	48.77%	43.81%	+4.96%

Volatility

COII vs. MSTZ - Volatility Comparison

The current volatility for REX COIN Growth & Income ETF (COII) is 14.58%, while T-REX 2X Inverse MSTR Daily Target ETF (MSTZ) has a volatility of 56.66%. This indicates that COII experiences smaller price fluctuations and is considered to be less risky than MSTZ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COII	MSTZ	Difference
Volatility (1M) Calculated over the trailing 1-month period	14.58%	56.66%	-42.08%
Volatility (6M) Calculated over the trailing 6-month period	51.81%	135.05%	-83.24%
Volatility (1Y) Calculated over the trailing 1-year period	66.59%	148.51%	-81.92%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	66.93%	170.85%	-103.92%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	66.93%	170.85%	-103.92%

COII vs. MSTZ - Expense Ratio Comparison

COII has a 0.99% expense ratio, which is lower than MSTZ's 1.05% expense ratio.

Dividends

COII vs. MSTZ - Dividend Comparison

Neither COII nor MSTZ has paid dividends to shareholders.

Position	TTM	2025
COII REX COIN Growth & Income ETF	75.93%	41.52%
MSTZ T-REX 2X Inverse MSTR Daily Target ETF	0.00%	0.00%

Frequently Asked Questions

Can I hold both COII and MSTZ in my portfolio?

COII and MSTZ have a correlation of -0.72, 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 MSTZ?

MSTZ has higher volatility (56.66%) compared to COII (14.58%). In terms of maximum drawdown, COII dropped -72.22% vs MSTZ's -99.38%.

Which ETF is better, COII or MSTZ?

On 1-year performance, MSTZ leads with 252.57% vs -68.31% for COII. On fees, COII is cheaper at 0.99% per year. On volatility, COII has been the lower-risk option at 14.58%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, COII or MSTZ?

Over the 1-year period, MSTZ has performed better with a 252.57% 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 MSTZ?

COII is cheaper with a 0.99% expense ratio, compared with 1.05% for MSTZ.

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

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

What is the main difference between COII and MSTZ?

COII is categorized as Derivative Income, while MSTZ is Inverse Equities. They also come from different issuers: REX Shares and REX. Their fees differ too: 0.99% for COII and 1.05% for MSTZ.

Which has better risk-adjusted returns?

MSTZ currently has the higher Sharpe Ratio (1.71 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.