SKF vs. SSO

Last updated Jun 24, 2026

SKF (ProShares UltraShort Financials) and SSO (ProShares Ultra S&P500) are both Leveraged Equities funds from ProShares - SKF tracks the DJ Global United States (All) / Financials -IND (-200%) while SSO tracks the S&P 500. Both are passively managed. Over the past 10 years, SKF returned -27.50%/yr vs 24.26%/yr for SSO. At a correlation of -0.83, they often move in opposite directions. SKF charges 0.95%/yr vs 0.87%/yr for SSO.

Performance

SKF vs. SSO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares UltraShort Financials (SKF) and ProShares Ultra S&P500 (SSO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SKF achieves a 2.60% return, which is significantly lower than SSO's 12.95% return. Over the past 10 years, SKF has underperformed SSO with an annualized return of -27.50%, while SSO has yielded a comparatively higher 24.26% annualized return.

SKF

• 1D: -0.73%
• 1M: -7.49%
• YTD: 2.60%
• 6M: 5.47%
• 1Y: -10.08%
• 3Y*: -27.28%
• 5Y*: -17.96%
• 10Y*: -27.50%

SSO

• 1D: -2.86%
• 1M: -3.30%
• YTD: 12.95%
• 6M: 10.86%
• 1Y: 42.28%
• 3Y*: 33.83%
• 5Y*: 17.91%
• 10Y*: 24.26%

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

SKF vs. SSO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SKF ProShares UltraShort Financials	2.60%	-23.99%	-36.29%	-21.78%	17.63%	-47.66%	-42.40%	-42.97%	16.42%	-31.70%
SSO ProShares Ultra S&P500	12.95%	26.19%	43.48%	46.65%	-38.98%	60.57%	21.54%	63.45%	-14.60%	44.35%

Correlation

The correlation between SKF and SSO is -0.57, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.57
Correlation (3Y) Calculated over the trailing 3-year period	-0.64
Correlation (5Y) Calculated over the trailing 5-year period	-0.76
Correlation (10Y) Calculated over the trailing 10-year period	-0.78
Correlation (All Time) Calculated using the full available price history since Feb 1, 2007	-0.83

Over the past year, the inverse relationship between SKF and SSO has weakened: their correlation has moved from -0.83 to -0.57, meaning they move in opposite directions less often than they have historically.

SKF vs. SSO - Sectors Allocation Comparison

Sectors	SKF	SSO
Financial Services	59.3%	25.1%
Basic Materials	-	1.2%
Communication Services	-	6.6%
Consumer Cyclical	-	6.2%
Consumer Defensive	-	3.1%
Energy	-	2.2%
Healthcare	-	5.7%
Industrials	-	5.2%
Real Estate	-	1.2%
Technology	-	24.9%
Utilities	-	1.7%

Return for Risk

SKF vs. SSO — Risk / Return Rank

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

SKF

SKF Risk / Return Rank: 5
SKF Sharpe Ratio Rank: 6
SKF Sortino Ratio Rank: 6
SKF Omega Ratio Rank: 6
SKF Calmar Ratio Rank: 5
SKF Martin Ratio Rank: 4

SSO

SSO Risk / Return Rank: 50
SSO Sharpe Ratio Rank: 51
SSO Sortino Ratio Rank: 46
SSO Omega Ratio Rank: 48
SSO Calmar Ratio Rank: 49
SSO Martin Ratio Rank: 58

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.

SKF vs. SSO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares UltraShort Financials (SKF) and ProShares Ultra S&P500 (SSO). 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.

	SKF	SSO	Difference
Sharpe ratio: Return per unit of total volatility	-0.35	1.71	-2.06
Sortino ratio: Return per unit of downside risk	-0.33	2.24	-2.57
Omega ratio: Gain probability vs. loss probability	0.96	1.30	-0.33
Calmar ratio: Return relative to maximum drawdown	-0.46	2.34	-2.80
Martin ratio: Return relative to average drawdown	-1.05	9.90	-10.95

SKF vs. SSO - Sharpe Ratio Comparison

The current SKF Sharpe Ratio is -0.35, which is lower than the SSO Sharpe Ratio of 1.71. The chart below compares the historical Sharpe Ratios of SKF and SSO, 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

SKF vs. SSO - Drawdown Comparison

The maximum SKF drawdown since its inception was -99.96%, which is greater than SSO's maximum drawdown of -84.67%. Use the drawdown chart below to compare losses from any high point for SKF and SSO.

Drawdown Indicators

	SKF	SSO	Difference
Max Drawdown Largest peak-to-trough decline	-99.96%	-84.67%	-15.29%
Max Drawdown (1Y) Largest decline over 1 year	-22.02%	-18.17%	-3.85%
Max Drawdown (3Y) Largest decline over 3 years	-68.09%	-35.21%	-32.88%
Max Drawdown (5Y) Largest decline over 5 years	-72.40%	-46.73%	-25.67%
Max Drawdown (10Y) Largest decline over 10 years	-96.51%	-59.34%	-37.17%
Current Drawdown Current decline from peak	-99.95%	-6.70%	-93.25%
Average Drawdown Average peak-to-trough decline	-89.27%	-19.53%	-69.74%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.95%	4.28%	+5.67%

Volatility

SKF vs. SSO - Volatility Comparison

The current volatility for ProShares UltraShort Financials (SKF) is 8.32%, while ProShares Ultra S&P500 (SSO) has a volatility of 9.70%. This indicates that SKF experiences smaller price fluctuations and is considered to be less risky than SSO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SKF	SSO	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.32%	9.70%	-1.38%
Volatility (6M) Calculated over the trailing 6-month period	22.47%	19.65%	+2.82%
Volatility (1Y) Calculated over the trailing 1-year period	29.21%	24.92%	+4.29%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	36.04%	33.85%	+2.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	40.82%	35.93%	+4.89%

SKF vs. SSO - Expense Ratio Comparison

SKF has a 0.95% expense ratio, which is higher than SSO's 0.87% expense ratio.

Dividends

SKF vs. SSO - Dividend Comparison

SKF's dividend yield for the trailing twelve months is around 4.61%, more than SSO's 0.65% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SKF ProShares UltraShort Financials	4.61%	5.61%	7.94%	3.93%	0.03%	0.00%	0.11%	1.29%	0.06%	0.00%	0.00%	0.00%
SSO ProShares Ultra S&P500	0.65%	0.68%	0.85%	0.18%	0.50%	0.18%	0.20%	0.50%	0.75%	0.39%	0.51%	0.63%

Frequently Asked Questions

Can I hold both SKF and SSO in my portfolio?

SKF and SSO have a correlation of -0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SKF or SSO?

SSO has higher volatility (9.70%) compared to SKF (8.32%). In terms of maximum drawdown, SKF dropped -99.96% vs SSO's -84.67%.

Which ETF is better, SKF or SSO?

On 10-year performance, SSO leads with 24.26% vs -27.50% for SKF. On fees, SSO is cheaper at 0.87% per year. On volatility, SKF has been the lower-risk option at 8.32%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, SKF or SSO?

Over the 10-year period, SSO has performed better with a 24.26% return vs -27.50%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, SKF or SSO?

SSO is cheaper with a 0.87% expense ratio, compared with 0.95% for SKF.

Which ETF pays a higher dividend yield, SKF or SSO?

SKF has the higher dividend yield at 4.61%, compared with 0.65% for SSO.

What is the main difference between SKF and SSO?

SKF tracks DJ Global United States (All) / Financials -IND (-200%), while SSO tracks S&P 500. Their fees differ too: 0.95% for SKF and 0.87% for SSO.

Which has better risk-adjusted returns?

SSO currently has the higher Sharpe Ratio (1.71 vs -0.35), 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.