SPXU vs. MUU

Last updated Jun 4, 2026

SPXU (ProShares UltraPro Short S&P500) and MUU (Direxion Daily MU Bull 2X Shares) are both Leveraged Equities funds. SPXU is passively managed, while MUU is actively managed. Over the past year, SPXU returned -48.96% vs 6522.95% for MUU. At a correlation of -0.54, they often move in opposite directions. SPXU charges 0.93%/yr vs 1.06%/yr for MUU.

Performance

SPXU vs. MUU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares UltraPro Short S&P500 (SPXU) and Direxion Daily MU Bull 2X Shares (MUU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SPXU achieves a -25.62% return, which is significantly lower than MUU's 961.23% return.

SPXU

• 1D: 2.06%
• 1M: -13.20%
• YTD: -25.62%
• 6M: -25.04%
• 1Y: -48.96%
• 3Y*: -43.02%
• 5Y*: -34.89%
• 10Y*: -41.95%

MUU

• 1D: 3.08%
• 1M: 218.90%
• YTD: 961.23%
• 6M: 1,422.01%
• 1Y: 6,522.95%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SPXU vs. MUU - Yearly Performance Comparison

	2026 (YTD)	2025	2024
SPXU ProShares UltraPro Short S&P500	-25.62%	-41.73%	-4.06%
MUU Direxion Daily MU Bull 2X Shares	961.23%	599.03%	-43.09%

Correlation

The correlation between SPXU and MUU is -0.47, 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	-0.47
Correlation (All Time) Calculated using the full available price history since Oct 11, 2024	-0.54

The correlation between SPXU and MUU has been stable across timeframes, ranging from -0.54 to -0.47 - a consistent structural relationship.

Return for Risk

SPXU vs. MUU — Risk / Return Rank

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

SPXU

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

MUU

MUU Risk / Return Rank: 99
MUU Sharpe Ratio Rank: 100
MUU Sortino Ratio Rank: 98
MUU Omega Ratio Rank: 97
MUU Calmar Ratio Rank: 100
MUU Martin Ratio Rank: 100

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.

SPXU vs. MUU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares UltraPro Short S&P500 (SPXU) and Direxion Daily MU Bull 2X Shares (MUU). 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.

	SPXU	MUU	Difference
Sharpe ratio: Return per unit of total volatility	-1.39	50.40	-51.79
Sortino ratio: Return per unit of downside risk	-2.33	7.17	-9.50
Omega ratio: Gain probability vs. loss probability	0.75	1.91	-1.16
Calmar ratio: Return relative to maximum drawdown	-0.97	125.85	-126.81
Martin ratio: Return relative to average drawdown	-1.63	426.84	-428.47
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SPXU vs. MUU - Sharpe Ratio Comparison

The current SPXU Sharpe Ratio is -1.39, which is lower than the MUU Sharpe Ratio of 50.40. The chart below compares the historical Sharpe Ratios of SPXU and MUU, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	SPXU	MUU	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-1.39	50.40	-51.79
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.70	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.79	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.84	6.68	-7.52

Drawdowns

SPXU vs. MUU - Drawdown Comparison

The maximum SPXU drawdown since its inception was -99.99%, which is greater than MUU's maximum drawdown of -75.07%. Use the drawdown chart below to compare losses from any high point for SPXU and MUU.

Drawdown Indicators

	SPXU	MUU	Difference
Max Drawdown Largest peak-to-trough decline	-99.99%	-75.07%	-24.92%
Max Drawdown (1Y) Largest decline over 1 year	-50.82%	-52.72%	+1.90%
Max Drawdown (3Y) Largest decline over 3 years	-84.36%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-90.23%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-99.63%	—	—
Current Drawdown Current decline from peak	-99.99%	0.00%	-99.99%
Average Drawdown Average peak-to-trough decline	-93.33%	-23.44%	-69.89%
Ulcer Index Depth and duration of drawdowns from previous peaks	30.06%	15.51%	+14.55%

Volatility

SPXU vs. MUU - Volatility Comparison

The current volatility for ProShares UltraPro Short S&P500 (SPXU) is 8.58%, while Direxion Daily MU Bull 2X Shares (MUU) has a volatility of 54.78%. This indicates that SPXU experiences smaller price fluctuations and is considered to be less risky than MUU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPXU	MUU	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.58%	54.78%	-46.20%
Volatility (6M) Calculated over the trailing 6-month period	26.85%	105.07%	-78.22%
Volatility (1Y) Calculated over the trailing 1-year period	35.37%	131.77%	-96.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	50.33%	133.67%	-83.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	53.38%	133.67%	-80.29%

SPXU vs. MUU - Expense Ratio Comparison

SPXU has a 0.93% expense ratio, which is lower than MUU's 1.06% expense ratio.

Dividends

SPXU vs. MUU - Dividend Comparison

SPXU's dividend yield for the trailing twelve months is around 7.89%, more than MUU's 0.46% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
MUU Direxion Daily MU Bull 2X Shares	0.46%	4.27%	0.31%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SPXU ProShares UltraPro Short S&P500	7.89%	7.02%	9.53%	7.06%	0.39%	0.00%	0.70%	2.14%	1.41%	0.10%

Frequently Asked Questions

Can I hold both SPXU and MUU in my portfolio?

SPXU and MUU have a correlation of -0.47, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SPXU or MUU?

MUU has higher volatility (54.78%) compared to SPXU (8.58%). In terms of maximum drawdown, SPXU dropped -99.99% vs MUU's -75.07%.

Which ETF is better, SPXU or MUU?

On 1-year performance, MUU leads with 6522.95% vs -48.96% for SPXU. On fees, SPXU is cheaper at 0.93% per year. On volatility, SPXU has been the lower-risk option at 8.58%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, SPXU or MUU?

Over the 1-year period, MUU has performed better with a 6522.95% return vs -48.96%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, SPXU or MUU?

SPXU is cheaper with a 0.93% expense ratio, compared with 1.06% for MUU.

Which ETF pays a higher dividend yield, SPXU or MUU?

SPXU has the higher dividend yield at 7.89%, compared with 0.46% for MUU.

What is the main difference between SPXU and MUU?

They also come from different issuers: ProShares and Direxion. Their fees differ too: 0.93% for SPXU and 1.06% for MUU.

Which has better risk-adjusted returns?

MUU currently has the higher Sharpe Ratio (50.40 vs -1.39), 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.