RYMMX vs. RYPNX

Last updated Jun 4, 2026

RYMMX (Rydex S&P MidCap 400 Pure Value Fund) and RYPNX (Royce Opportunity Fund) are both Small Cap Value Equities funds. Over the past 10 years, RYMMX returned 9.86%/yr vs 14.95%/yr for RYPNX. Their correlation of 0.92 suggests significant overlap in exposure. RYMMX charges 2.26%/yr vs 1.21%/yr for RYPNX.

Performance

RYMMX vs. RYPNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rydex S&P MidCap 400 Pure Value Fund (RYMMX) and Royce Opportunity Fund (RYPNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RYMMX achieves a 12.45% return, which is significantly lower than RYPNX's 29.63% return. Over the past 10 years, RYMMX has underperformed RYPNX with an annualized return of 9.86%, while RYPNX has yielded a comparatively higher 14.95% annualized return.

RYMMX

• 1D: 1.70%
• 1M: 3.95%
• YTD: 12.45%
• 6M: 9.88%
• 1Y: 22.84%
• 3Y*: 14.27%
• 5Y*: 7.63%
• 10Y*: 9.86%

RYPNX

• 1D: 1.78%
• 1M: 6.69%
• YTD: 29.63%
• 6M: 29.57%
• 1Y: 56.22%
• 3Y*: 21.62%
• 5Y*: 9.47%
• 10Y*: 14.95%

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

RYMMX vs. RYPNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RYMMX Rydex S&P MidCap 400 Pure Value Fund	12.45%	5.11%	3.49%	26.78%	-6.06%	30.05%	5.74%	20.83%	-19.66%	12.28%
RYPNX Royce Opportunity Fund	29.63%	11.95%	10.20%	19.72%	-17.19%	30.34%	26.52%	28.24%	-20.10%	21.69%

Correlation

The correlation between RYMMX and RYPNX is 0.79, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.90
Correlation (10Y) Calculated over the trailing 10-year period	0.90
Correlation (All Time) Calculated using the full available price history since Jan 4, 2005	0.92

The correlation between RYMMX and RYPNX shifts across timeframes, from 0.79 (1 year) to 0.92 (all time), reflecting how their relationship changes across market environments.

Return for Risk

RYMMX vs. RYPNX — Risk / Return Rank

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

RYMMX

RYMMX Risk / Return Rank: 24
RYMMX Sharpe Ratio Rank: 23
RYMMX Sortino Ratio Rank: 25
RYMMX Omega Ratio Rank: 22
RYMMX Calmar Ratio Rank: 29
RYMMX Martin Ratio Rank: 23

RYPNX

RYPNX Risk / Return Rank: 82
RYPNX Sharpe Ratio Rank: 86
RYPNX Sortino Ratio Rank: 76
RYPNX Omega Ratio Rank: 66
RYPNX Calmar Ratio Rank: 92
RYPNX Martin Ratio Rank: 92

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.

RYMMX vs. RYPNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rydex S&P MidCap 400 Pure Value Fund (RYMMX) and Royce Opportunity Fund (RYPNX). 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.

	RYMMX	RYPNX	Difference
Sharpe ratio: Return per unit of total volatility	1.38	2.81	-1.43
Sortino ratio: Return per unit of downside risk	2.11	3.66	-1.56
Omega ratio: Gain probability vs. loss probability	1.25	1.45	-0.21
Calmar ratio: Return relative to maximum drawdown	1.99	5.01	-3.02
Martin ratio: Return relative to average drawdown	5.73	19.11	-13.38
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RYMMX vs. RYPNX - Sharpe Ratio Comparison

The current RYMMX Sharpe Ratio is 1.38, which is lower than the RYPNX Sharpe Ratio of 2.81. The chart below compares the historical Sharpe Ratios of RYMMX and RYPNX, 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

	RYMMX	RYPNX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.38	2.81	-1.43
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.35	0.39	-0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.40	0.59	-0.20
Sharpe Ratio (All Time) Calculated using the full available price history	0.27	0.54	-0.27

Drawdowns

RYMMX vs. RYPNX - Drawdown Comparison

The maximum RYMMX drawdown since its inception was -73.49%, which is greater than RYPNX's maximum drawdown of -69.31%. Use the drawdown chart below to compare losses from any high point for RYMMX and RYPNX.

Drawdown Indicators

	RYMMX	RYPNX	Difference
Max Drawdown Largest peak-to-trough decline	-73.49%	-69.31%	-4.18%
Max Drawdown (1Y) Largest decline over 1 year	-12.54%	-12.01%	-0.53%
Max Drawdown (3Y) Largest decline over 3 years	-25.11%	-30.23%	+5.12%
Max Drawdown (5Y) Largest decline over 5 years	-25.11%	-30.77%	+5.66%
Max Drawdown (10Y) Largest decline over 10 years	-54.43%	-50.61%	-3.82%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-11.98%	-10.67%	-1.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.35%	3.14%	+1.21%

Volatility

RYMMX vs. RYPNX - Volatility Comparison

The current volatility for Rydex S&P MidCap 400 Pure Value Fund (RYMMX) is 4.70%, while Royce Opportunity Fund (RYPNX) has a volatility of 5.46%. This indicates that RYMMX experiences smaller price fluctuations and is considered to be less risky than RYPNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RYMMX	RYPNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.70%	5.46%	-0.76%
Volatility (6M) Calculated over the trailing 6-month period	11.82%	14.68%	-2.86%
Volatility (1Y) Calculated over the trailing 1-year period	18.08%	21.41%	-3.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.94%	24.26%	-2.32%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.03%	25.34%	-0.31%

RYMMX vs. RYPNX - Expense Ratio Comparison

RYMMX has a 2.26% expense ratio, which is higher than RYPNX's 1.21% expense ratio.

Dividends

RYMMX vs. RYPNX - Dividend Comparison

RYMMX's dividend yield for the trailing twelve months is around 0.16%, less than RYPNX's 7.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RYMMX Rydex S&P MidCap 400 Pure Value Fund	0.16%	0.18%	8.21%	0.48%	17.90%	6.82%	0.05%	0.00%	3.84%	1.94%	0.22%	0.30%
RYPNX Royce Opportunity Fund	7.43%	9.63%	7.95%	4.52%	5.12%	22.51%	0.00%	1.57%	10.21%	14.91%	6.89%	10.04%

Frequently Asked Questions

Can I hold both RYMMX and RYPNX in my portfolio?

RYMMX and RYPNX have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RYMMX or RYPNX?

RYPNX has higher volatility (5.46%) compared to RYMMX (4.70%). In terms of maximum drawdown, RYMMX dropped -73.49% vs RYPNX's -69.31%.

Which has better risk-adjusted returns?

RYPNX currently has the higher Sharpe Ratio (2.81 vs 1.38), 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.