AIBD vs. MSTZ

Last updated Jun 24, 2026

AIBD (Direxion Daily AI and Big Data Bear 2X Shares) and MSTZ (T-REX 2X Inverse MSTR Daily Target ETF) are both Inverse Equities funds. AIBD is passively managed, while MSTZ is actively managed. Over the past year, AIBD returned -50.84% vs 138.79% for MSTZ. At a 0.44 correlation, their price movements are largely independent. Both charge a 1.05% expense ratio.

Performance

AIBD vs. MSTZ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Direxion Daily AI and Big Data Bear 2X Shares (AIBD) and T-REX 2X Inverse MSTR Daily Target ETF (MSTZ). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with AIBD having a -29.34% return and MSTZ slightly higher at -28.57%.

AIBD

• 1D: 4.59%
• 1M: -0.57%
• YTD: -29.34%
• 6M: -27.18%
• 1Y: -50.84%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MSTZ

• 1D: 10.06%
• 1M: 102.15%
• YTD: -28.57%
• 6M: -23.10%
• 1Y: 138.79%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

AIBD vs. MSTZ - Yearly Performance Comparison

	2026 (YTD)	2025	2024
AIBD Direxion Daily AI and Big Data Bear 2X Shares	-29.34%	-49.15%	-23.89%
MSTZ T-REX 2X Inverse MSTR Daily Target ETF	-28.57%	-38.95%	-94.43%

Correlation

The correlation between AIBD and MSTZ is 0.45, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.45
Correlation (All Time) Calculated using the full available price history since Sep 18, 2024	0.44

Return for Risk

AIBD vs. MSTZ — Risk / Return Rank

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

AIBD

AIBD Risk / Return Rank: 1
AIBD Sharpe Ratio Rank: 2
AIBD Sortino Ratio Rank: 2
AIBD Omega Ratio Rank: 2
AIBD Calmar Ratio Rank: 1
AIBD Martin Ratio Rank: 0

MSTZ

MSTZ Risk / Return Rank: 34
MSTZ Sharpe Ratio Rank: 28
MSTZ Sortino Ratio Rank: 41
MSTZ Omega Ratio Rank: 40
MSTZ Calmar Ratio Rank: 35
MSTZ Martin Ratio Rank: 26

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.

AIBD vs. MSTZ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Direxion Daily AI and Big Data Bear 2X Shares (AIBD) 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.

	AIBD	MSTZ	Difference
Sharpe ratio: Return per unit of total volatility	-0.94	0.97	-1.91
Sortino ratio: Return per unit of downside risk	-1.45	1.98	-3.43
Omega ratio: Gain probability vs. loss probability	0.85	1.25	-0.40
Calmar ratio: Return relative to maximum drawdown	-0.87	1.64	-2.51
Martin ratio: Return relative to average drawdown	-1.72	3.27	-5.00

AIBD vs. MSTZ - Sharpe Ratio Comparison

The current AIBD Sharpe Ratio is -0.94, which is lower than the MSTZ Sharpe Ratio of 0.97. The chart below compares the historical Sharpe Ratios of AIBD 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

AIBD vs. MSTZ - Drawdown Comparison

The maximum AIBD drawdown since its inception was -82.11%, smaller than the maximum MSTZ drawdown of -99.38%. Use the drawdown chart below to compare losses from any high point for AIBD and MSTZ.

Drawdown Indicators

	AIBD	MSTZ	Difference
Max Drawdown Largest peak-to-trough decline	-82.11%	-99.38%	+17.27%
Max Drawdown (1Y) Largest decline over 1 year	-58.75%	-84.89%	+26.14%
Current Drawdown Current decline from peak	-78.50%	-97.57%	+19.07%
Average Drawdown Average peak-to-trough decline	-48.87%	-94.45%	+45.58%
Ulcer Index Depth and duration of drawdowns from previous peaks	32.08%	42.87%	-10.79%

Volatility

AIBD vs. MSTZ - Volatility Comparison

The current volatility for Direxion Daily AI and Big Data Bear 2X Shares (AIBD) is 21.86%, while T-REX 2X Inverse MSTR Daily Target ETF (MSTZ) has a volatility of 42.31%. This indicates that AIBD 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

	AIBD	MSTZ	Difference
Volatility (1M) Calculated over the trailing 1-month period	21.86%	42.31%	-20.45%
Volatility (6M) Calculated over the trailing 6-month period	40.59%	127.64%	-87.05%
Volatility (1Y) Calculated over the trailing 1-year period	54.13%	143.71%	-89.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	57.30%	169.81%	-112.51%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	57.30%	169.81%	-112.51%

AIBD vs. MSTZ - Expense Ratio Comparison

Both AIBD and MSTZ have an expense ratio of 1.05%.

Dividends

AIBD vs. MSTZ - Dividend Comparison

AIBD's dividend yield for the trailing twelve months is around 5.81%, while MSTZ has not paid dividends to shareholders.

Position	TTM	2025	2024
AIBD Direxion Daily AI and Big Data Bear 2X Shares	5.81%	4.37%	3.58%
MSTZ T-REX 2X Inverse MSTR Daily Target ETF	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both AIBD and MSTZ in my portfolio?

AIBD and MSTZ have a correlation of 0.45, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AIBD or MSTZ?

MSTZ has higher volatility (42.31%) compared to AIBD (21.86%). In terms of maximum drawdown, AIBD dropped -82.11% vs MSTZ's -99.38%.

Which ETF is better, AIBD or MSTZ?

On 1-year performance, MSTZ leads with 138.79% vs -50.84% for AIBD. Both ETFs have the same 1.05% expense ratio. On volatility, AIBD has been the lower-risk option at 21.86%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, AIBD or MSTZ?

Over the 1-year period, MSTZ has performed better with a 138.79% return vs -50.84%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, AIBD or MSTZ?

AIBD and MSTZ have the same expense ratio: 1.05% per year.

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

AIBD has the higher dividend yield at 5.81%, compared with 0.00% for MSTZ.

What is the main difference between AIBD and MSTZ?

They also come from different issuers: Direxion and REX.

Which has better risk-adjusted returns?

MSTZ currently has the higher Sharpe Ratio (0.97 vs -0.94), 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.