RBLU vs. MULL

Last updated Jun 24, 2026

RBLU (T-Rex 2X Long RBLX Daily Target ETF) and MULL (GraniteShares 2x Long MU Daily ETF) are both Leveraged Equities funds. RBLU is passively managed, while MULL is actively managed. Over the past year, RBLU returned -88.85% vs 3622.12% for MULL. At a 0.12 correlation, their price movements are largely independent. RBLU charges 1.05%/yr vs 1.50%/yr for MULL.

Performance

RBLU vs. MULL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T-Rex 2X Long RBLX Daily Target ETF (RBLU) and GraniteShares 2x Long MU Daily ETF (MULL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RBLU achieves a -76.56% return, which is significantly lower than MULL's 780.13% return.

RBLU

• 1D: -0.87%
• 1M: -8.69%
• YTD: -76.56%
• 6M: -76.79%
• 1Y: -88.85%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MULL

• 1D: -26.45%
• 1M: 69.00%
• YTD: 780.13%
• 6M: 832.94%
• 1Y: 3,622.12%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

RBLU vs. MULL - Yearly Performance Comparison

	2026 (YTD)	2025
RBLU T-Rex 2X Long RBLX Daily Target ETF	-76.56%	23.90%
MULL GraniteShares 2x Long MU Daily ETF	780.13%	522.23%

Correlation

The correlation between RBLU and MULL is 0.04, 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 (1Y) Calculated over the trailing 1-year period	0.04
Correlation (All Time) Calculated using the full available price history since Mar 4, 2025	0.12

Return for Risk

RBLU vs. MULL — Risk / Return Rank

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

RBLU

RBLU Risk / Return Rank: 2
RBLU Sharpe Ratio Rank: 3
RBLU Sortino Ratio Rank: 1
RBLU Omega Ratio Rank: 1
RBLU Calmar Ratio Rank: 1
RBLU Martin Ratio Rank: 2

MULL

MULL Risk / Return Rank: 98
MULL Sharpe Ratio Rank: 100
MULL Sortino Ratio Rank: 96
MULL Omega Ratio Rank: 95
MULL Calmar Ratio Rank: 100
MULL Martin Ratio Rank: 99

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.

RBLU vs. MULL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T-Rex 2X Long RBLX Daily Target ETF (RBLU) and GraniteShares 2x Long MU Daily ETF (MULL). 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.

	RBLU	MULL	Difference
Sharpe ratio: Return per unit of total volatility	-0.72	25.24	-25.96
Sortino ratio: Return per unit of downside risk	-1.48	5.61	-7.09
Omega ratio: Gain probability vs. loss probability	0.82	1.71	-0.90
Calmar ratio: Return relative to maximum drawdown	-0.94	69.24	-70.18
Martin ratio: Return relative to average drawdown	-1.36	221.31	-222.67

RBLU vs. MULL - Sharpe Ratio Comparison

The current RBLU Sharpe Ratio is -0.72, which is lower than the MULL Sharpe Ratio of 25.24. The chart below compares the historical Sharpe Ratios of RBLU and MULL, 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

RBLU vs. MULL - Drawdown Comparison

The maximum RBLU drawdown since its inception was -94.76%, which is greater than MULL's maximum drawdown of -72.29%. Use the drawdown chart below to compare losses from any high point for RBLU and MULL.

Drawdown Indicators

	RBLU	MULL	Difference
Max Drawdown Largest peak-to-trough decline	-94.76%	-72.29%	-22.47%
Max Drawdown (1Y) Largest decline over 1 year	-94.76%	-53.09%	-41.67%
Current Drawdown Current decline from peak	-93.45%	-26.45%	-67.00%
Average Drawdown Average peak-to-trough decline	-44.77%	-20.52%	-24.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	65.26%	16.58%	+48.68%

Volatility

RBLU vs. MULL - Volatility Comparison

The current volatility for T-Rex 2X Long RBLX Daily Target ETF (RBLU) is 37.54%, while GraniteShares 2x Long MU Daily ETF (MULL) has a volatility of 74.91%. This indicates that RBLU experiences smaller price fluctuations and is considered to be less risky than MULL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RBLU	MULL	Difference
Volatility (1M) Calculated over the trailing 1-month period	37.54%	74.91%	-37.37%
Volatility (6M) Calculated over the trailing 6-month period	102.64%	119.83%	-17.19%
Volatility (1Y) Calculated over the trailing 1-year period	122.97%	145.72%	-22.75%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	118.40%	142.49%	-24.09%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	118.40%	142.49%	-24.09%

RBLU vs. MULL - Expense Ratio Comparison

RBLU has a 1.05% expense ratio, which is lower than MULL's 1.50% expense ratio.

Dividends

RBLU vs. MULL - Dividend Comparison

RBLU's dividend yield for the trailing twelve months is around 5.52%, more than MULL's 0.04% yield.

Position	TTM	2025
MULL GraniteShares 2x Long MU Daily ETF	0.04%	0.39%
RBLU T-Rex 2X Long RBLX Daily Target ETF	5.52%	1.29%

Frequently Asked Questions

Can I hold both RBLU and MULL in my portfolio?

RBLU and MULL have a correlation of 0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RBLU or MULL?

MULL has higher volatility (74.91%) compared to RBLU (37.54%). In terms of maximum drawdown, RBLU dropped -94.76% vs MULL's -72.29%.

Which ETF is better, RBLU or MULL?

On 1-year performance, MULL leads with 3622.12% vs -88.85% for RBLU. On fees, RBLU is cheaper at 1.05% per year. On volatility, RBLU has been the lower-risk option at 37.54%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, RBLU or MULL?

Over the 1-year period, MULL has performed better with a 3622.12% return vs -88.85%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, RBLU or MULL?

RBLU is cheaper with a 1.05% expense ratio, compared with 1.50% for MULL.

Which ETF pays a higher dividend yield, RBLU or MULL?

RBLU has the higher dividend yield at 5.52%, compared with 0.04% for MULL.

What is the main difference between RBLU and MULL?

They also come from different issuers: T-Rex and GraniteShares. Their fees differ too: 1.05% for RBLU and 1.50% for MULL.

Which has better risk-adjusted returns?

MULL currently has the higher Sharpe Ratio (25.24 vs -0.72), 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.