UKPIX vs. RYURX

Last updated Jun 3, 2026

UKPIX (ProFunds Ultra Short Japan Fund) and RYURX (Rydex Inverse S&P 500 Strategy Fund) are both Inverse Equities funds. Over the past 10 years, UKPIX returned -33.97%/yr vs -25.99%/yr for RYURX. A 0.71 correlation means they provide meaningful diversification when combined. UKPIX charges 1.78%/yr vs 1.49%/yr for RYURX.

Performance

UKPIX vs. RYURX - Performance Comparison

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

Returns By Period

In the year-to-date period, UKPIX achieves a -48.64% return, which is significantly lower than RYURX's -8.72% return. Over the past 10 years, UKPIX has underperformed RYURX with an annualized return of -33.97%, while RYURX has yielded a comparatively higher -25.99% annualized return.

UKPIX

• 1D: -3.19%
• 1M: -23.08%
• YTD: -48.64%
• 6M: -50.45%
• 1Y: -72.81%
• 3Y*: -44.75%
• 5Y*: -35.96%
• 10Y*: -33.97%

RYURX

• 1D: -0.12%
• 1M: -5.09%
• YTD: -8.72%
• 6M: -8.24%
• 1Y: -17.89%
• 3Y*: -49.15%
• 5Y*: -34.38%
• 10Y*: -25.99%

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

UKPIX vs. RYURX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
UKPIX ProFunds Ultra Short Japan Fund	-48.64%	-44.54%	-34.55%	-43.26%	9.92%	-20.34%	-47.86%	-35.34%	13.58%	-34.24%
RYURX Rydex Inverse S&P 500 Strategy Fund	-8.72%	-82.28%	-13.04%	-14.56%	17.56%	-24.19%	-24.90%	-22.65%	4.33%	-17.38%

Correlation

The correlation between UKPIX and RYURX is 0.69, 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	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.65
Correlation (5Y) Calculated over the trailing 5-year period	0.68
Correlation (10Y) Calculated over the trailing 10-year period	0.69
Correlation (All Time) Calculated using the full available price history since Mar 29, 2006	0.71

The correlation between UKPIX and RYURX has been stable across timeframes, ranging from 0.65 to 0.71 - a consistent structural relationship.

Return for Risk

UKPIX vs. RYURX — Risk / Return Rank

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

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

RYURX

RYURX Risk / Return Rank: 0
RYURX Sharpe Ratio Rank: 0
RYURX Sortino Ratio Rank: 0
RYURX Omega Ratio Rank: 0
RYURX Calmar Ratio Rank: 0
RYURX 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.

UKPIX vs. RYURX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProFunds Ultra Short Japan Fund (UKPIX) 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.

	UKPIX	RYURX	Difference
Sharpe ratio Return per unit of total volatility	-1.51	-1.56	+0.05
Sortino ratio Return per unit of downside risk	-3.01	-2.25	-0.75
Omega ratio Gain probability vs. loss probability	0.65	0.76	-0.10
Calmar ratio Return relative to maximum drawdown	-0.99	-1.00	+0.01
Martin ratio Return relative to average drawdown	-1.56	-1.87	+0.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

UKPIX vs. RYURX - Sharpe Ratio Comparison

The current UKPIX Sharpe Ratio is -1.51, which is comparable to the RYURX Sharpe Ratio of -1.56. The chart below compares the historical Sharpe Ratios of UKPIX and RYURX, 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

	UKPIX	RYURX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-1.51	-1.56	+0.05
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.08	-0.87	+0.79
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.11	-0.84	+0.73
Sharpe Ratio (All Time) Calculated using the full available price history	-0.13	-0.62	+0.50

Drawdowns

UKPIX vs. RYURX - Drawdown Comparison

The maximum UKPIX drawdown since its inception was -99.98%, roughly equal to the maximum RYURX drawdown of -99.34%. Use the drawdown chart below to compare losses from any high point for UKPIX and RYURX.

Drawdown Indicators

	UKPIX	RYURX	Difference
Max Drawdown Largest peak-to-trough decline	-99.98%	-99.34%	-0.64%
Max Drawdown (1Y) Largest decline over 1 year	-73.28%	-18.35%	-54.93%
Max Drawdown (3Y) Largest decline over 3 years	-94.60%	-87.70%	-6.90%
Max Drawdown (5Y) Largest decline over 5 years	-96.97%	-88.82%	-8.15%
Max Drawdown (10Y) Largest decline over 10 years	-99.51%	-95.29%	-4.22%
Current Drawdown Current decline from peak	-99.95%	-99.34%	-0.61%
Average Drawdown Average peak-to-trough decline	-82.80%	-69.04%	-13.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	46.55%	9.86%	+36.69%

Volatility

UKPIX vs. RYURX - Volatility Comparison

ProFunds Ultra Short Japan Fund (UKPIX) has a higher volatility of 13.62% compared to Rydex Inverse S&P 500 Strategy Fund (RYURX) at 2.79%. This indicates that UKPIX'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.

Volatility by Period

	UKPIX	RYURX	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.62%	2.79%	+10.83%
Volatility (6M) Calculated over the trailing 6-month period	37.51%	8.93%	+28.58%
Volatility (1Y) Calculated over the trailing 1-year period	48.41%	11.79%	+36.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	427.40%	39.62%	+387.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	303.49%	31.10%	+272.39%

UKPIX vs. RYURX - Expense Ratio Comparison

UKPIX has a 1.78% expense ratio, which is higher than RYURX's 1.49% expense ratio.

Dividends

UKPIX vs. RYURX - Dividend Comparison

UKPIX's dividend yield for the trailing twelve months is around 3.20%, less than RYURX's 4.18% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
RYURX Rydex Inverse S&P 500 Strategy Fund	4.18%	3.82%	6.78%	2.79%	0.00%	0.00%	0.42%	0.86%
UKPIX ProFunds Ultra Short Japan Fund	3.20%	1.65%	9.69%	1.62%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both UKPIX and RYURX in my portfolio?

UKPIX and RYURX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, UKPIX or RYURX?

UKPIX has higher volatility (13.62%) compared to RYURX (2.79%). In terms of maximum drawdown, UKPIX dropped -99.98% vs RYURX's -99.34%.

Which has better risk-adjusted returns?

UKPIX currently has the higher Sharpe Ratio (-1.51 vs -1.56), 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.