OILK vs. SSO

Last updated Jun 4, 2026

OILK (ProShares K-1 Free Crude Oil Strategy ETF) and SSO (ProShares Ultra S&P500) are both exchange-traded funds - OILK is a Oil & Gas fund tracking the Bloomberg Commodity Balanced WTI Crude Oil Index, while SSO is a Leveraged Equities fund tracking the S&P 500. Both are passively managed. Over the past 5 years, OILK returned 17.73%/yr vs 19.62%/yr for SSO. At a 0.18 correlation, their price movements are largely independent. OILK charges 0.68%/yr vs 0.87%/yr for SSO.

Performance

OILK vs. SSO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares K-1 Free Crude Oil Strategy ETF (OILK) 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, OILK achieves a 64.22% return, which is significantly higher than SSO's 19.37% return.

OILK

• 1D: 1.40%
• 1M: -1.65%
• YTD: 64.22%
• 6M: 60.70%
• 1Y: 58.99%
• 3Y*: 19.03%
• 5Y*: 17.73%
• 10Y*: —

SSO

• 1D: -1.40%
• 1M: 9.75%
• YTD: 19.37%
• 6M: 18.81%
• 1Y: 52.69%
• 3Y*: 37.56%
• 5Y*: 19.62%
• 10Y*: 24.21%

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

OILK vs. SSO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OILK ProShares K-1 Free Crude Oil Strategy ETF	64.22%	-11.86%	8.18%	-0.97%	27.57%	63.71%	-61.09%	30.48%	-20.40%	2.82%
SSO ProShares Ultra S&P500	19.37%	26.19%	43.48%	46.65%	-38.98%	60.57%	21.54%	63.45%	-14.60%	44.35%

Correlation

The correlation between OILK and SSO is -0.29, 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	-0.29
Correlation (3Y) Calculated over the trailing 3-year period	-0.04
Correlation (5Y) Calculated over the trailing 5-year period	0.10
Correlation (All Time) Calculated using the full available price history since Sep 29, 2016	0.18

The correlation between OILK and SSO shifts across timeframes, from -0.29 (1 year) to 0.18 (all time), reflecting how their relationship changes across market environments.

OILK vs. SSO - Sectors Allocation Comparison

Sectors	OILK	SSO
Consumer Cyclical	100.0%	10.1%
Basic Materials	-	1.8%
Communication Services	-	11.2%
Consumer Defensive	-	4.9%
Energy	-	3.5%
Financial Services	-	11.8%
Healthcare	-	8.5%
Industrials	-	8.3%
Real Estate	-	1.9%
Technology	-	35.6%
Utilities	-	2.4%

Return for Risk

OILK vs. SSO — Risk / Return Rank

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

OILK

OILK Risk / Return Rank: 55
OILK Sharpe Ratio Rank: 60
OILK Sortino Ratio Rank: 53
OILK Omega Ratio Rank: 54
OILK Calmar Ratio Rank: 68
OILK Martin Ratio Rank: 42

SSO

SSO Risk / Return Rank: 62
SSO Sharpe Ratio Rank: 66
SSO Sortino Ratio Rank: 59
SSO Omega Ratio Rank: 60
SSO Calmar Ratio Rank: 58
SSO Martin Ratio Rank: 68

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.

OILK vs. SSO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares K-1 Free Crude Oil Strategy ETF (OILK) 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.

	OILK	SSO	Difference
Sharpe ratio Return per unit of total volatility	2.06	2.25	-0.18
Sortino ratio Return per unit of downside risk	2.59	2.86	-0.27
Omega ratio Gain probability vs. loss probability	1.34	1.38	-0.04
Calmar ratio Return relative to maximum drawdown	3.42	2.91	+0.50
Martin ratio Return relative to average drawdown	6.91	12.80	-5.89
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OILK vs. SSO - Sharpe Ratio Comparison

The current OILK Sharpe Ratio is 2.06, which is comparable to the SSO Sharpe Ratio of 2.25. The chart below compares the historical Sharpe Ratios of OILK 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.

Sharpe Ratios by Period

	OILK	SSO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.06	2.25	-0.18
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.59	0.59	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.68	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.12	0.42	-0.30

Drawdowns

OILK vs. SSO - Drawdown Comparison

The maximum OILK drawdown since its inception was -83.76%, roughly equal to the maximum SSO drawdown of -84.67%. Use the drawdown chart below to compare losses from any high point for OILK and SSO.

Drawdown Indicators

	OILK	SSO	Difference
Max Drawdown Largest peak-to-trough decline	-83.76%	-84.67%	+0.91%
Max Drawdown (1Y) Largest decline over 1 year	-17.35%	-18.17%	+0.82%
Max Drawdown (3Y) Largest decline over 3 years	-23.42%	-35.21%	+11.79%
Max Drawdown (5Y) Largest decline over 5 years	-34.69%	-46.73%	+12.04%
Max Drawdown (10Y) Largest decline over 10 years	—	-59.34%	—
Current Drawdown Current decline from peak	-3.66%	-1.40%	-2.26%
Average Drawdown Average peak-to-trough decline	-32.61%	-19.57%	-13.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.56%	4.13%	+4.43%

Volatility

OILK vs. SSO - Volatility Comparison

ProShares K-1 Free Crude Oil Strategy ETF (OILK) has a higher volatility of 10.44% compared to ProShares Ultra S&P500 (SSO) at 5.66%. This indicates that OILK's price experiences larger fluctuations and is considered to be riskier than SSO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OILK	SSO	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.44%	5.66%	+4.78%
Volatility (6M) Calculated over the trailing 6-month period	23.26%	17.78%	+5.48%
Volatility (1Y) Calculated over the trailing 1-year period	28.75%	23.60%	+5.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.12%	33.65%	-3.53%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	35.97%	35.89%	+0.08%

OILK vs. SSO - Expense Ratio Comparison

OILK has a 0.68% expense ratio, which is lower than SSO's 0.87% expense ratio.

Dividends

OILK vs. SSO - Dividend Comparison

OILK's dividend yield for the trailing twelve months is around 8.18%, more than SSO's 0.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OILK ProShares K-1 Free Crude Oil Strategy ETF	8.18%	4.79%	3.11%	5.80%	17.32%	68.82%	0.13%	0.94%	0.58%	6.17%	0.00%	0.00%
SSO ProShares Ultra S&P500	0.62%	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 OILK and SSO in my portfolio?

OILK and SSO have a correlation of -0.29, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OILK or SSO?

OILK has higher volatility (10.44%) compared to SSO (5.66%). In terms of maximum drawdown, OILK dropped -83.76% vs SSO's -84.67%.

Which ETF is better, OILK or SSO?

On 5-year performance, SSO leads with 19.62% vs 17.73% for OILK. On fees, OILK is cheaper at 0.68% per year. On volatility, SSO has been the lower-risk option at 5.66%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, OILK or SSO?

Over the 5-year period, SSO has performed better with a 19.62% return vs 17.73%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, OILK or SSO?

OILK is cheaper with a 0.68% expense ratio, compared with 0.87% for SSO.

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

OILK has the higher dividend yield at 8.18%, compared with 0.62% for SSO.

What is the main difference between OILK and SSO?

OILK is categorized as Oil & Gas, while SSO is Leveraged Equities. OILK tracks Bloomberg Commodity Balanced WTI Crude Oil Index, while SSO tracks S&P 500. Their fees differ too: 0.68% for OILK and 0.87% for SSO.

Which has better risk-adjusted returns?

SSO currently has the higher Sharpe Ratio (2.25 vs 2.06), 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.