SOPIX vs. RYURX
SOPIX (ProFunds Short NASDAQ-100 Fund) and RYURX (Rydex Inverse S&P 500 Strategy Fund) are both Inverse Equities funds. Over the past 10 years, SOPIX returned -19.61%/yr vs -12.47%/yr for RYURX. Their correlation of 0.89 means they have usually moved in the same direction. SOPIX charges 1.78%/yr vs 1.49%/yr for RYURX.
Performance
SOPIX vs. RYURX - Performance Comparison
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Returns By Period
In the year-to-date period, SOPIX achieves a -9.87% return, which is significantly lower than RYURX's -6.06% return. Over the past 10 years, SOPIX has underperformed RYURX with an annualized return of -19.61%, while RYURX has yielded a comparatively higher -12.47% annualized return.
SOPIX
- 1D
- -3.36%
- 1M
- 4.31%
- 6M
- -9.07%
- YTD
- -9.87%
- 1Y
- -17.52%
- 3Y*
- -17.93%
- 5Y*
- -14.03%
- 10Y*
- -19.61%
- ALL TIME*
- -17.47%
RYURX
- 1D
- -1.56%
- 1M
- 0.93%
- 6M
- -5.19%
- YTD
- -6.06%
- 1Y
- -12.58%
- 3Y*
- -10.49%
- 5Y*
- -7.99%
- 10Y*
- -12.47%
- ALL TIME*
- -10.18%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
SOPIX vs. RYURX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
SOPIX ProFunds Short NASDAQ-100 Fund | -9.87% | -15.80% | -23.82% | -31.85% | 34.73% | -25.69% | -42.92% | -28.29% | -3.07% | -25.24% |
RYURX Rydex Inverse S&P 500 Strategy Fund | -6.06% | -11.41% | -13.04% | -14.56% | 17.56% | -24.19% | -24.90% | -22.65% | 4.33% | -17.38% |
Correlation
The correlation between SOPIX and RYURX is 0.93, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.93 |
Correlation (3Y) Balances recent behavior with more history. | 0.92 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.93 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.90 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2003 | 0.89 |
The correlation between SOPIX and RYURX has been stable across timeframes, ranging from 0.89 to 0.93 - a consistent structural relationship.
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Return for Risk
SOPIX vs. RYURX — Risk / Return Rank
SOPIX
RYURX
SOPIX vs. RYURX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for ProFunds Short NASDAQ-100 Fund (SOPIX) and Rydex Inverse S&P 500 Strategy Fund (RYURX). 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.
| SOPIX | RYURX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.05 | ||
| Sortino ratioReturn per unit of downside risk | +0.09 | ||
| Omega ratioGain probability vs. loss probability | 0.88 | 0.87 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | -0.62 | -0.67 | +0.05 |
| Martin ratioReturn relative to average drawdown | -1.21 | -1.21 | 0.00 |
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Drawdowns
SOPIX vs. RYURX - Drawdown Comparison
The maximum SOPIX drawdown since its inception was -99.07%, roughly equal to the maximum RYURX drawdown of -96.72%. Use the drawdown chart below to compare losses from any high point for SOPIX and RYURX.
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Drawdown Indicators
| SOPIX | RYURX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -99.07% | -96.72% | -2.35% |
Max Drawdown (1Y)Largest decline over 1 year | -24.87% | -16.08% | -8.79% |
Max Drawdown (3Y)Largest decline over 3 years | -54.87% | -38.48% | -16.39% |
Max Drawdown (5Y)Largest decline over 5 years | -65.00% | -44.10% | -20.90% |
Max Drawdown (10Y)Largest decline over 10 years | -89.76% | -75.17% | -14.59% |
Current DrawdownCurrent decline from peak | -98.99% | -96.63% | -2.36% |
Average DrawdownAverage peak-to-trough decline | -76.28% | -69.05% | -7.23% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 12.79% | 8.97% | +3.82% |
Volatility
SOPIX vs. RYURX - Volatility Comparison
ProFunds Short NASDAQ-100 Fund (SOPIX) has a higher volatility of 6.90% compared to Rydex Inverse S&P 500 Strategy Fund (RYURX) at 3.38%. This indicates that SOPIX's price experiences larger fluctuations and is considered to be riskier than RYURX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SOPIX | RYURX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.90% | 3.38% | +3.52% |
Volatility (6M)Calculated over the trailing 6-month period | 15.93% | 10.05% | +5.88% |
Volatility (1Y)Calculated over the trailing 1-year period | 19.30% | 12.78% | +6.52% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 23.86% | 17.11% | +6.75% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.69% | 18.11% | +4.58% |
SOPIX vs. RYURX - Expense Ratio Comparison
SOPIX has a 1.78% expense ratio, which is higher than RYURX's 1.49% expense ratio.
Dividends
SOPIX vs. RYURX - Dividend Comparison
SOPIX's dividend yield for the trailing twelve months is around 2.38%, less than RYURX's 4.06% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 |
|---|---|---|---|---|---|---|---|---|
RYURX Rydex Inverse S&P 500 Strategy Fund | 4.06% | 3.82% | 6.78% | 2.79% | 0.00% | 0.00% | 0.42% | 0.86% |
SOPIX ProFunds Short NASDAQ-100 Fund | 2.38% | 2.14% | 0.00% | 6.71% | 0.00% | 0.00% | 0.00% | 0.29% |
Frequently Asked Questions
With a correlation of 0.93, SOPIX and RYURX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
SOPIX has higher volatility (6.90%) compared to RYURX (3.38%). In terms of maximum drawdown, SOPIX dropped -99.07% vs RYURX's -96.72%.
SOPIX currently has the higher Sharpe Ratio (-0.80 vs -0.85), 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.
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