SOPIX vs. USPIX

Last updated Jun 3, 2026

SOPIX (ProFunds Short NASDAQ-100 Fund) and USPIX (ProFunds UltraShort NASDAQ-100 Fund) are both Inverse Equities funds from ProFunds. Over the past 10 years, SOPIX returned -20.70%/yr vs -58.50%/yr for USPIX. With a 0.99 correlation, they move nearly in lockstep. SOPIX charges 1.78%/yr vs 1.68%/yr for USPIX.

Performance

SOPIX vs. USPIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProFunds Short NASDAQ-100 Fund (SOPIX) and ProFunds UltraShort NASDAQ-100 Fund (USPIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SOPIX achieves a -16.58% return, which is significantly higher than USPIX's -32.01% return. Over the past 10 years, SOPIX has outperformed USPIX with an annualized return of -20.70%, while USPIX has yielded a comparatively lower -58.50% annualized return.

SOPIX

• 1D: -0.56%
• 1M: -8.98%
• YTD: -16.58%
• 6M: -15.30%
• 1Y: -27.28%
• 3Y*: -21.80%
• 5Y*: -16.77%
• 10Y*: -20.70%

USPIX

• 1D: -1.10%
• 1M: -17.54%
• YTD: -32.01%
• 6M: -30.18%
• 1Y: -49.73%
• 3Y*: -40.62%
• 5Y*: -34.13%
• 10Y*: -58.50%

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

SOPIX vs. USPIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SOPIX ProFunds Short NASDAQ-100 Fund	-16.58%	-15.80%	-23.82%	-31.85%	34.73%	-25.69%	-42.92%	-28.29%	-3.07%	-25.24%
USPIX ProFunds UltraShort NASDAQ-100 Fund	-32.01%	-35.26%	-38.20%	-57.06%	61.80%	-46.20%	-96.36%	-50.15%	-9.56%	-44.56%

Correlation

The correlation between SOPIX and USPIX 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	0.99
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	0.99
Correlation (All Time) Calculated using the full available price history since Jan 3, 2003	0.99

The correlation between SOPIX and USPIX has been stable across timeframes, ranging from 0.99 to 1.00 - a consistent structural relationship.

Return for Risk

SOPIX vs. USPIX — Risk / Return Rank

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

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

USPIX

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

SOPIX vs. USPIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProFunds Short NASDAQ-100 Fund (SOPIX) and ProFunds UltraShort NASDAQ-100 Fund (USPIX). 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.

	SOPIX	USPIX	Difference
Sharpe ratio Return per unit of total volatility	-1.74	-1.57	-0.17
Sortino ratio Return per unit of downside risk	-2.61	-2.70	+0.08
Omega ratio Gain probability vs. loss probability	0.73	0.72	+0.01
Calmar ratio Return relative to maximum drawdown	-1.00	-1.00	0.00
Martin ratio Return relative to average drawdown	-2.10	-1.94	-0.16
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SOPIX vs. USPIX - Sharpe Ratio Comparison

The current SOPIX Sharpe Ratio is -1.74, which is comparable to the USPIX Sharpe Ratio of -1.57. The chart below compares the historical Sharpe Ratios of SOPIX and USPIX, 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

	SOPIX	USPIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-1.74	-1.57	-0.17
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.72	-0.76	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.92	-1.01	+0.09
Sharpe Ratio (All Time) Calculated using the full available price history	-0.81	-0.73	-0.08

Drawdowns

SOPIX vs. USPIX - Drawdown Comparison

The maximum SOPIX drawdown since its inception was -99.06%, roughly equal to the maximum USPIX drawdown of -100.00%. Use the drawdown chart below to compare losses from any high point for SOPIX and USPIX.

Drawdown Indicators

	SOPIX	USPIX	Difference
Max Drawdown Largest peak-to-trough decline	-99.06%	-100.00%	+0.94%
Max Drawdown (1Y) Largest decline over 1 year	-27.12%	-49.50%	+22.38%
Max Drawdown (3Y) Largest decline over 3 years	-54.67%	-80.68%	+26.01%
Max Drawdown (5Y) Largest decline over 5 years	-64.84%	-89.37%	+24.53%
Max Drawdown (10Y) Largest decline over 10 years	-90.82%	-99.99%	+9.17%
Current Drawdown Current decline from peak	-99.06%	-100.00%	+0.94%
Average Drawdown Average peak-to-trough decline	-76.13%	-96.44%	+20.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.18%	25.98%	-12.80%

Volatility

SOPIX vs. USPIX - Volatility Comparison

The current volatility for ProFunds Short NASDAQ-100 Fund (SOPIX) is 4.55%, while ProFunds UltraShort NASDAQ-100 Fund (USPIX) has a volatility of 9.10%. This indicates that SOPIX experiences smaller price fluctuations and is considered to be less risky than USPIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SOPIX	USPIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.55%	9.10%	-4.55%
Volatility (6M) Calculated over the trailing 6-month period	12.18%	24.47%	-12.29%
Volatility (1Y) Calculated over the trailing 1-year period	16.04%	32.18%	-16.14%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.38%	45.19%	-21.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.49%	58.07%	-35.58%

SOPIX vs. USPIX - Expense Ratio Comparison

SOPIX has a 1.78% expense ratio, which is higher than USPIX's 1.68% expense ratio.

Dividends

SOPIX vs. USPIX - Dividend Comparison

SOPIX's dividend yield for the trailing twelve months is around 2.57%, less than USPIX's 3.98% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
SOPIX ProFunds Short NASDAQ-100 Fund	2.57%	2.14%	0.00%	6.71%	0.00%	0.00%	0.00%	0.29%
USPIX ProFunds UltraShort NASDAQ-100 Fund	3.98%	2.71%	0.00%	5.92%	0.00%	0.00%	0.07%	0.36%

Frequently Asked Questions

Can I hold both SOPIX and USPIX in my portfolio?

With a correlation of 1.00, SOPIX and USPIX 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, SOPIX or USPIX?

USPIX has higher volatility (9.10%) compared to SOPIX (4.55%). In terms of maximum drawdown, SOPIX dropped -99.06% vs USPIX's -100.00%.

Which has better risk-adjusted returns?

USPIX currently has the higher Sharpe Ratio (-1.57 vs -1.74), 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.