MYY vs. MSTZ

Last updated Jul 14, 2026

MYY (ProShares Short S&P Mid Cap400) and MSTZ (T-REX 2X Inverse MSTR Daily Target ETF) are both Inverse Equities funds. MYY is passively managed, while MSTZ is actively managed. Over the past year, MYY returned -13.14% vs 282.56% for MSTZ. At a 0.39 correlation, their price movements are largely independent. MYY charges 0.95%/yr vs 1.05%/yr for MSTZ.

Performance

MYY vs. MSTZ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares Short S&P Mid Cap400 (MYY) 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, MYY achieves a -11.03% return, which is significantly higher than MSTZ's -23.27% return.

MYY

• 1D: 0.53%
• 1M: 1.24%
• 6M: -6.84%
• YTD: -11.03%
• 1Y: -13.14%
• 3Y*: -8.04%
• 5Y*: -6.30%
• 10Y*: -10.79%

MSTZ

• 1D: 5.07%
• 1M: 46.38%
• 6M: -9.68%
• YTD: -23.27%
• 1Y: 282.56%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MYY vs. MSTZ - Yearly Performance Comparison

	2026 (YTD)	2025	2024
MYY ProShares Short S&P Mid Cap400	-11.03%	-4.05%	-0.52%
MSTZ T-REX 2X Inverse MSTR Daily Target ETF	-23.27%	-38.95%	-94.43%

Correlation

The correlation between MYY and MSTZ is 0.38, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.38
Correlation (All Time) Calculated using the full available price history since Sep 18, 2024	0.39

Return for Risk

MYY vs. MSTZ — Risk / Return Rank

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

MYY

MYY Risk / Return Rank: 3
MYY Sharpe Ratio Rank: 3
MYY Sortino Ratio Rank: 3
MYY Omega Ratio Rank: 3
MYY Calmar Ratio Rank: 3
MYY Martin Ratio Rank: 2

MSTZ

MSTZ Risk / Return Rank: 68
MSTZ Sharpe Ratio Rank: 76
MSTZ Sortino Ratio Rank: 67
MSTZ Omega Ratio Rank: 68
MSTZ Calmar Ratio Rank: 80
MSTZ Martin Ratio Rank: 49

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.

MYY vs. MSTZ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares Short S&P Mid Cap400 (MYY) 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.

	MYY	MSTZ	Difference
Sharpe ratio: Return per unit of total volatility	-0.83	1.92	-2.75
Sortino ratio: Return per unit of downside risk	-1.09	2.45	-3.54
Omega ratio: Gain probability vs. loss probability	0.87	1.32	-0.45
Calmar ratio: Return relative to maximum drawdown	-0.72	3.35	-4.08
Martin ratio: Return relative to average drawdown	-1.36	6.53	-7.89

MYY vs. MSTZ - Sharpe Ratio Comparison

The current MYY Sharpe Ratio is -0.83, which is lower than the MSTZ Sharpe Ratio of 1.92. The chart below compares the historical Sharpe Ratios of MYY 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

MYY vs. MSTZ - Drawdown Comparison

The maximum MYY drawdown since its inception was -95.20%, roughly equal to the maximum MSTZ drawdown of -99.38%. Use the drawdown chart below to compare losses from any high point for MYY and MSTZ.

Drawdown Indicators

	MYY	MSTZ	Difference
Max Drawdown Largest peak-to-trough decline	-95.20%	-99.38%	+4.18%
Max Drawdown (1Y) Largest decline over 1 year	-18.25%	-84.89%	+66.64%
Max Drawdown (3Y) Largest decline over 3 years	-35.14%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-37.79%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-71.93%	—	—
Current Drawdown Current decline from peak	-95.07%	-97.39%	+2.32%
Average Drawdown Average peak-to-trough decline	-72.25%	-94.53%	+22.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.65%	43.51%	-33.86%

Volatility

MYY vs. MSTZ - Volatility Comparison

The current volatility for ProShares Short S&P Mid Cap400 (MYY) is 4.22%, while T-REX 2X Inverse MSTR Daily Target ETF (MSTZ) has a volatility of 56.56%. This indicates that MYY 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

	MYY	MSTZ	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.22%	56.56%	-52.34%
Volatility (6M) Calculated over the trailing 6-month period	11.69%	135.11%	-123.42%
Volatility (1Y) Calculated over the trailing 1-year period	15.83%	148.53%	-132.70%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.60%	171.02%	-151.42%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.21%	171.02%	-149.81%

MYY vs. MSTZ - Expense Ratio Comparison

MYY has a 0.95% expense ratio, which is lower than MSTZ's 1.05% expense ratio.

Dividends

MYY vs. MSTZ - Dividend Comparison

MYY's dividend yield for the trailing twelve months is around 4.29%, while MSTZ has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
MSTZ T-REX 2X Inverse MSTR Daily Target ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MYY ProShares Short S&P Mid Cap400	4.29%	4.20%	4.92%	5.08%	0.40%	0.00%	0.05%	1.52%	0.34%

Frequently Asked Questions

Can I hold both MYY and MSTZ in my portfolio?

MYY and MSTZ have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MYY or MSTZ?

MSTZ has higher volatility (56.56%) compared to MYY (4.22%). In terms of maximum drawdown, MYY dropped -95.20% vs MSTZ's -99.38%.

Which ETF is better, MYY or MSTZ?

On 1-year performance, MSTZ leads with 282.56% vs -13.14% for MYY. On fees, MYY is cheaper at 0.95% per year. On volatility, MYY has been the lower-risk option at 4.22%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MYY or MSTZ?

Over the 1-year period, MSTZ has performed better with a 282.56% return vs -13.14%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MYY or MSTZ?

MYY is cheaper with a 0.95% expense ratio, compared with 1.05% for MSTZ.

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

MYY has the higher dividend yield at 4.29%, compared with 0.00% for MSTZ.

What is the main difference between MYY and MSTZ?

They also come from different issuers: ProShares and REX. Their fees differ too: 0.95% for MYY and 1.05% for MSTZ.

Which has better risk-adjusted returns?

MSTZ currently has the higher Sharpe Ratio (1.92 vs -0.83), 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.