RYWWX vs. UKPIX

Last updated Aug 1, 2026

RYWWX (Rydex Inverse Emerging Markets 2x Strategy Fund) and UKPIX (ProFunds Ultra Short Japan Fund) are both Inverse Equities funds. Over the past 10 years, RYWWX returned -26.08%/yr vs -15.97%/yr for UKPIX. Their 0.58 correlation means they have sometimes moved together and sometimes differently. RYWWX charges 1.87%/yr vs 1.78%/yr for UKPIX.

Performance

RYWWX vs. UKPIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Rydex Inverse Emerging Markets 2x Strategy Fund (RYWWX) and ProFunds Ultra Short Japan Fund (UKPIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RYWWX achieves a -11.52% return, which is significantly higher than UKPIX's -45.96% return. Over the past 10 years, RYWWX has underperformed UKPIX with an annualized return of -26.08%, while UKPIX has yielded a comparatively higher -15.97% annualized return.

RYWWX

• 1D: -6.74%
• 1M: -4.78%
• 6M: 2.89%
• YTD: -11.52%
• 1Y: -34.70%
• 3Y*: -28.35%
• 5Y*: -20.73%
• 10Y*: -26.08%
• ALL TIME*: -19.84%

UKPIX

• 1D: -7.70%
• 1M: 12.75%
• 6M: -38.57%
• YTD: -45.96%
• 1Y: -67.69%
• 3Y*: 24.54%
• 5Y*: 0.86%
• 10Y*: -15.97%
• ALL TIME*: -17.96%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
RYWWX Rydex Inverse Emerging Markets 2x Strategy Fund	$0.00	$0.00	$0.00
UKPIX ProFunds Ultra Short Japan Fund	$0.00	$0.00	$0.00

RYWWX vs. UKPIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RYWWX Rydex Inverse Emerging Markets 2x Strategy Fund	-11.52%	-51.31%	-17.03%	-28.06%	2.55%	17.09%	-57.70%	-39.99%	23.02%	-47.98%
UKPIX ProFunds Ultra Short Japan Fund	-45.96%	-44.54%	554.47%	-43.26%	9.92%	-20.34%	-47.86%	-35.34%	13.58%	-34.24%

Correlation

The correlation between RYWWX and UKPIX is 0.64, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.64
Correlation (3Y) Balances recent behavior with more history.	0.55
Correlation (5Y) Shows whether the relationship held over a longer period.	0.58
Correlation (10Y) Provides a long-term view across more market conditions.	0.58
Correlation (All Time) Calculated using the full available price history since Jan 3, 2011	0.58

The correlation between RYWWX and UKPIX has been stable across timeframes, ranging from 0.55 to 0.64 - a consistent structural relationship.

Return for Risk

RYWWX vs. UKPIX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

RYWWX

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

UKPIX

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

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

RYWWX vs. UKPIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rydex Inverse Emerging Markets 2x Strategy Fund (RYWWX) and ProFunds Ultra Short Japan Fund (UKPIX). 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.

	RYWWX	UKPIX	Difference
Sharpe ratio: Return per unit of total volatility	-0.75	-1.21	+0.46
Sortino ratio: Return per unit of downside risk	-0.94	-2.24	+1.29
Omega ratio: Gain probability vs. loss probability	0.89	0.75	+0.14
Calmar ratio: Return relative to maximum drawdown	-0.78	-0.90	+0.12
Martin ratio: Return relative to average drawdown	-1.08	-1.35	+0.28

RYWWX vs. UKPIX - Sharpe Ratio Comparison

The current RYWWX Sharpe Ratio is -0.75, which is higher than the UKPIX Sharpe Ratio of -1.21. The chart below compares the historical Sharpe Ratios of RYWWX and UKPIX, 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

RYWWX vs. UKPIX - Drawdown Comparison

The maximum RYWWX drawdown since its inception was -98.12%, roughly equal to the maximum UKPIX drawdown of -99.83%. Use the drawdown chart below to compare losses from any high point for RYWWX and UKPIX.

Drawdown Indicators

	RYWWX	UKPIX	Difference
Max Drawdown Largest peak-to-trough decline	-98.12%	-99.83%	+1.71%
Max Drawdown (1Y) Largest decline over 1 year	-42.47%	-74.60%	+32.13%
Max Drawdown (3Y) Largest decline over 3 years	-75.97%	-83.62%	+7.65%
Max Drawdown (5Y) Largest decline over 5 years	-84.06%	-83.62%	-0.44%
Max Drawdown (10Y) Largest decline over 10 years	-95.68%	-94.69%	-0.99%
Current Drawdown Current decline from peak	-97.87%	-99.43%	+1.56%
Average Drawdown Average peak-to-trough decline	-68.89%	-82.82%	+13.93%
Ulcer Index Depth and duration of drawdowns from previous peaks	30.63%	49.36%	-18.73%

Volatility

RYWWX vs. UKPIX - Volatility Comparison

The current volatility for Rydex Inverse Emerging Markets 2x Strategy Fund (RYWWX) is 13.36%, while ProFunds Ultra Short Japan Fund (UKPIX) has a volatility of 19.08%. This indicates that RYWWX experiences smaller price fluctuations and is considered to be less risky than UKPIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RYWWX	UKPIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.36%	19.08%	-5.72%
Volatility (6M) Calculated over the trailing 6-month period	35.51%	45.61%	-10.10%
Volatility (1Y) Calculated over the trailing 1-year period	44.19%	55.21%	-11.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	47.95%	425.82%	-377.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	46.58%	302.13%	-255.55%

RYWWX vs. UKPIX - Expense Ratio Comparison

RYWWX has a 1.87% expense ratio, which is higher than UKPIX's 1.78% expense ratio.

Dividends

RYWWX vs. UKPIX - Dividend Comparison

RYWWX's dividend yield for the trailing twelve months is around 5.65%, more than UKPIX's 3.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
RYWWX Rydex Inverse Emerging Markets 2x Strategy Fund	5.65%	5.00%	5.36%	3.28%	0.00%	0.00%	0.00%	1.06%
UKPIX ProFunds Ultra Short Japan Fund	3.05%	1.65%	9.69%	1.62%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both RYWWX and UKPIX in my portfolio?

RYWWX and UKPIX have a correlation of 0.64, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RYWWX or UKPIX?

UKPIX has higher volatility (19.08%) compared to RYWWX (13.36%). In terms of maximum drawdown, RYWWX dropped -98.12% vs UKPIX's -99.83%.

Which has better risk-adjusted returns?

RYWWX currently has the higher Sharpe Ratio (-0.75 vs -1.21), 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.