RYAIX vs. SOPIX

Last updated Jun 23, 2026

RYAIX (Rydex Inverse NASDAQ-100 Strategy Fund) and SOPIX (ProFunds Short NASDAQ-100 Fund) are both Inverse Equities funds. Over the past 10 years, RYAIX returned -19.45%/yr vs -20.89%/yr for SOPIX. With a 0.99 correlation, they move nearly in lockstep. RYAIX charges 1.55%/yr vs 1.78%/yr for SOPIX.

Performance

RYAIX vs. SOPIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rydex Inverse NASDAQ-100 Strategy Fund (RYAIX) and ProFunds Short NASDAQ-100 Fund (SOPIX). 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 RYAIX having a -17.13% return and SOPIX slightly higher at -16.61%. Over the past 10 years, RYAIX has outperformed SOPIX with an annualized return of -19.45%, while SOPIX has yielded a comparatively lower -20.89% annualized return.

RYAIX

• 1D: -2.40%
• 1M: -3.32%
• YTD: -17.13%
• 6M: -16.30%
• 1Y: -27.22%
• 3Y*: -18.23%
• 5Y*: -14.33%
• 10Y*: -19.45%

SOPIX

• 1D: -2.47%
• 1M: -3.30%
• YTD: -16.61%
• 6M: -15.82%
• 1Y: -27.00%
• 3Y*: -20.90%
• 5Y*: -16.29%
• 10Y*: -20.89%

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

RYAIX vs. SOPIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RYAIX Rydex Inverse NASDAQ-100 Strategy Fund	-17.13%	-15.63%	-15.64%	-31.71%	35.92%	-24.88%	-40.98%	-27.65%	-2.63%	-24.47%
SOPIX ProFunds Short NASDAQ-100 Fund	-16.61%	-15.80%	-23.82%	-31.85%	34.73%	-25.69%	-42.92%	-28.29%	-3.07%	-25.24%

Correlation

The correlation between RYAIX and SOPIX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.99
Correlation (10Y) Calculated over the trailing 10-year period	0.99
Correlation (All Time) Calculated using the full available price history since Jan 2, 2003	0.99

The correlation between RYAIX and SOPIX has been stable across timeframes, ranging from 0.98 to 1.00 - a consistent structural relationship.

Return for Risk

RYAIX vs. SOPIX — Risk / Return Rank

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

RYAIX

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

SOPIX

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

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.

RYAIX vs. SOPIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rydex Inverse NASDAQ-100 Strategy Fund (RYAIX) and ProFunds Short NASDAQ-100 Fund (SOPIX). 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.

	RYAIX	SOPIX	Difference
Sharpe ratio: Return per unit of total volatility	-1.52	-1.52	0.00
Sortino ratio: Return per unit of downside risk	-2.27	-2.28	+0.01
Omega ratio: Gain probability vs. loss probability	0.75	0.76	0.00
Calmar ratio: Return relative to maximum drawdown	-0.98	-0.98	0.00
Martin ratio: Return relative to average drawdown	-1.98	-1.96	-0.02

RYAIX vs. SOPIX - Sharpe Ratio Comparison

The current RYAIX Sharpe Ratio is -1.52, which is comparable to the SOPIX Sharpe Ratio of -1.52. The chart below compares the historical Sharpe Ratios of RYAIX and SOPIX, 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

RYAIX vs. SOPIX - Drawdown Comparison

The maximum RYAIX drawdown since its inception was -98.93%, roughly equal to the maximum SOPIX drawdown of -99.07%. Use the drawdown chart below to compare losses from any high point for RYAIX and SOPIX.

Drawdown Indicators

	RYAIX	SOPIX	Difference
Max Drawdown Largest peak-to-trough decline	-98.93%	-99.07%	+0.14%
Max Drawdown (1Y) Largest decline over 1 year	-26.80%	-26.57%	-0.23%
Max Drawdown (3Y) Largest decline over 3 years	-50.13%	-54.87%	+4.74%
Max Drawdown (5Y) Largest decline over 5 years	-61.15%	-65.00%	+3.85%
Max Drawdown (10Y) Largest decline over 10 years	-89.04%	-90.86%	+1.82%
Current Drawdown Current decline from peak	-98.92%	-99.06%	+0.14%
Average Drawdown Average peak-to-trough decline	-73.33%	-76.17%	+2.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.57%	13.63%	-0.06%

Volatility

RYAIX vs. SOPIX - Volatility Comparison

Rydex Inverse NASDAQ-100 Strategy Fund (RYAIX) and ProFunds Short NASDAQ-100 Fund (SOPIX) have volatilities of 8.41% and 8.39%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RYAIX	SOPIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.41%	8.39%	+0.02%
Volatility (6M) Calculated over the trailing 6-month period	14.45%	14.28%	+0.17%
Volatility (1Y) Calculated over the trailing 1-year period	17.78%	17.63%	+0.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.09%	23.61%	-0.52%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.78%	22.61%	+0.17%

RYAIX vs. SOPIX - Expense Ratio Comparison

RYAIX has a 1.55% expense ratio, which is lower than SOPIX's 1.78% expense ratio.

Dividends

RYAIX vs. SOPIX - Dividend Comparison

RYAIX's dividend yield for the trailing twelve months is around 2.69%, more than SOPIX's 2.57% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
RYAIX Rydex Inverse NASDAQ-100 Strategy Fund	2.69%	2.23%	5.67%	4.81%	0.00%	0.00%	0.09%	0.72%
SOPIX ProFunds Short NASDAQ-100 Fund	2.57%	2.14%	0.00%	6.71%	0.00%	0.00%	0.00%	0.29%

Frequently Asked Questions

Can I hold both RYAIX and SOPIX in my portfolio?

With a correlation of 1.00, RYAIX and SOPIX 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.

Which is riskier, RYAIX or SOPIX?

RYAIX has higher volatility (8.41%) compared to SOPIX (8.39%). In terms of maximum drawdown, RYAIX dropped -98.93% vs SOPIX's -99.07%.

Which has better risk-adjusted returns?

RYAIX currently has the higher Sharpe Ratio (-1.52 vs -1.52), 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.