RYURX vs. SSO

Last updated Apr 1, 2026

Compare and contrast key facts about Rydex Inverse S&P 500 Strategy Fund (RYURX) and ProShares Ultra S&P500 (SSO).

RYURX is managed by Rydex Funds. It was launched on Jan 6, 1994. SSO is a passively managed fund by ProShares that tracks the performance of the S&P 500. It was launched on Jun 19, 2006.

Performance

RYURX vs. SSO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rydex Inverse S&P 500 Strategy Fund (RYURX) and ProShares Ultra S&P500 (SSO). The values are adjusted to include any dividend payments, if applicable.

RYURX vs. SSO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RYURX Rydex Inverse S&P 500 Strategy Fund	8.78%	-82.28%	-13.04%	-14.56%	17.56%	-24.19%	-24.90%	-22.65%	4.33%	-17.38%
SSO ProShares Ultra S&P500	-10.23%	26.19%	43.48%	46.65%	-38.98%	60.57%	21.54%	63.45%	-14.60%	44.35%

Returns By Period

In the year-to-date period, RYURX achieves a 8.78% return, which is significantly higher than SSO's -10.23% return. Over the past 10 years, RYURX has underperformed SSO with an annualized return of -24.82%, while SSO has yielded a comparatively higher 21.06% annualized return.

RYURX

• 1D: 0.42%
• 1M: 8.50%
• YTD: 8.78%
• 6M: 7.52%
• 1Y: -9.01%
• 3Y*: -46.66%
• 5Y*: -32.84%
• 10Y*: -24.82%

SSO

• 1D: 5.75%
• 1M: -10.37%
• YTD: -10.23%
• 6M: -7.08%
• 1Y: 26.35%
• 3Y*: 28.27%
• 5Y*: 15.34%
• 10Y*: 21.06%

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

RYURX vs. SSO - Expense Ratio Comparison

RYURX has a 1.49% expense ratio, which is higher than SSO's 0.87% expense ratio.

RYURX

Rydex Inverse S&P 500 Strategy Fund

SSO

ProShares Ultra S&P500

Return for Risk

RYURX vs. SSO — Risk / Return Rank

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

RYURX

RYURX Risk / Return Rank: 2
RYURX Sharpe Ratio Rank: 1
RYURX Sortino Ratio Rank: 1
RYURX Omega Ratio Rank: 1
RYURX Calmar Ratio Rank: 3
RYURX Martin Ratio Rank: 5

SSO

SSO Risk / Return Rank: 51
SSO Sharpe Ratio Rank: 43
SSO Sortino Ratio Rank: 49
SSO Omega Ratio Rank: 53
SSO Calmar Ratio Rank: 53
SSO Martin Ratio Rank: 58

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.

RYURX vs. SSO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rydex Inverse S&P 500 Strategy Fund (RYURX) and ProShares Ultra S&P500 (SSO). 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.

	RYURX	SSO	Difference
Sharpe ratio Return per unit of total volatility	-0.53	0.73	-1.26
Sortino ratio Return per unit of downside risk	-0.63	1.23	-1.87
Omega ratio Gain probability vs. loss probability	0.91	1.19	-0.28
Calmar ratio Return relative to maximum drawdown	-0.29	1.20	-1.49
Martin ratio Return relative to average drawdown	-0.35	5.18	-5.53
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RYURX vs. SSO - Sharpe Ratio Comparison

The current RYURX Sharpe Ratio is -0.53, which is lower than the SSO Sharpe Ratio of 0.73. The chart below compares the historical Sharpe Ratios of RYURX and SSO, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	RYURX	SSO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.53	0.73	-1.26
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.83	0.46	-1.29
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.80	0.59	-1.39
Sharpe Ratio (All Time) Calculated using the full available price history	-0.16	0.38	-0.53

Correlation

The correlation between RYURX and SSO is -0.99. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.

Dividends

RYURX vs. SSO - Dividend Comparison

RYURX's dividend yield for the trailing twelve months is around 3.51%, more than SSO's 0.82% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RYURX Rydex Inverse S&P 500 Strategy Fund	3.51%	3.82%	6.78%	2.79%	0.00%	0.00%	0.42%	0.86%	0.00%	0.00%	0.00%	0.00%
SSO ProShares Ultra S&P500	0.82%	0.68%	0.85%	0.18%	0.50%	0.18%	0.20%	0.50%	0.75%	0.39%	0.51%	0.63%

Drawdowns

RYURX vs. SSO - Drawdown Comparison

The maximum RYURX drawdown since its inception was -99.29%, which is greater than SSO's maximum drawdown of -84.67%. Use the drawdown chart below to compare losses from any high point for RYURX and SSO.

Drawdown Indicators

	RYURX	SSO	Difference
Max Drawdown Largest peak-to-trough decline	-99.29%	-84.67%	-14.62%
Max Drawdown (1Y) Largest decline over 1 year	-26.57%	-23.17%	-3.40%
Max Drawdown (5Y) Largest decline over 5 years	-87.96%	-46.73%	-41.23%
Max Drawdown (10Y) Largest decline over 10 years	-94.92%	-59.34%	-35.58%
Current Drawdown Current decline from peak	-99.22%	-13.46%	-85.76%
Average Drawdown Average peak-to-trough decline	-68.88%	-19.72%	-49.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	21.78%	5.38%	+16.40%

Volatility

RYURX vs. SSO - Volatility Comparison

The current volatility for Rydex Inverse S&P 500 Strategy Fund (RYURX) is 4.20%, while ProShares Ultra S&P500 (SSO) has a volatility of 10.60%. This indicates that RYURX experiences smaller price fluctuations and is considered to be less risky than SSO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RYURX	SSO	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.20%	10.60%	-6.40%
Volatility (6M) Calculated over the trailing 6-month period	8.98%	18.95%	-9.97%
Volatility (1Y) Calculated over the trailing 1-year period	18.07%	36.45%	-18.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	39.61%	33.66%	+5.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	31.08%	35.86%	-4.78%