ProShares UltraShort Bloomberg Crude Oil (Ticker: SCO) is an exchange-traded open-ended index fund listed on the NYSE Arca in the United States, launched on November 24, 2008. The fund’s investment objective is to seek daily investment results, before fees and expenses, that correspond to two times the inverse (-2x) of the daily performance of the Bloomberg WTI Crude Oil Subindex.
Structurally, SCO does not invest directly in physical crude oil. Instead, it achieves its investment goals by holding a portfolio of financial instruments based on WTI light sweet crude oil—including swap agreements, futures contracts, forward contracts, and options contracts. The underlying index it tracks is the Bloomberg Commodity Balanced WTI Crude Oil Index. As of July 2, 2026, Gate market data shows that SCO’s 52-week price range is between $22.84 and $84.14.
Understanding SCO hinges on two key concepts: "daily" and "-2x inverse." The fund’s leverage and inverse exposure reset at the close of each trading day, which means its long-term performance does not equate to simply two times the cumulative decline of the underlying index. This structural feature is the foundation for all subsequent analysis and risk discussion.
How Does the Return Structure of Leveraged Inverse ETFs Work?
SCO’s return structure is based on daily compounding. If the WTI Crude Oil Index drops by 1% in a day, SCO’s net asset value should theoretically rise by about 2%. Conversely, if the index rises by 1%, SCO would fall by about 2%.
However, this seemingly straightforward relationship is significantly affected by compounding over time. Because leverage resets daily, SCO’s actual long-term returns will almost certainly diverge from the simple expectation of "two times the cumulative decline of the index." In highly volatile markets, this deviation is magnified—a phenomenon known as "volatility decay" or "compounding drag."
For example, if oil prices rise one day and fall back to their original level the next, SCO’s net asset value will not return to its starting point; instead, it will experience some degree of loss. The more volatile the market and the longer the holding period, the more pronounced this decay becomes. As a result, SCO is widely regarded as a tool suited for short-term trading or tactical hedging, rather than a long-term investment.
What Is SCO’s Asset Size and Market Position?
In terms of market size, SCO holds a significant position among global inverse commodity ETFs. As of June 2026, SCO’s total assets under management were approximately $1.478 billion, ranking it among the largest inverse ETFs worldwide.
However, asset size figures can vary depending on the data source. Some sources report net assets of about $887 million or $905.77 million, reflecting rapid changes amid recent market volatility. SCO’s expense ratio is 0.95%, which is typical for leveraged ETFs.
SCO’s portfolio composition is somewhat unique. Its top ten holdings include the ProShares GENIUS Money Market ETF (IQMM), accounting for about 32%, and U.S. Treasuries at about 28%. Overall, cash and cash equivalents make up nearly 100% of its assets. This means SCO primarily achieves its leveraged inverse exposure through derivatives contracts, rather than by holding physical commodities or outright futures positions.
What Did SCO’s Market Performance Reveal in 2026?
The year 2026 was exceptionally dramatic for SCO. The fund’s price swung wildly between $22.84 and $84.14 over its 52-week range. As of July 1, 2026, SCO was trading at $36.13.
Historically, SCO’s long-term returns have shown a persistent downward trend. As of May 31, 2026, its year-to-date return was -64.95%, one-year return was -67.10%, and three-year return was -38.07%. Its five-year return stood at -94.18%, with a cumulative return of -25.70% since its 2008 inception.
These figures highlight a core characteristic of leveraged inverse ETFs: when the underlying asset (crude oil) trends upward or remains strong over the long term, inverse leveraged products suffer ongoing value erosion. While oil prices can be sharply influenced by geopolitical events in the short term, SCO’s net asset value has shown a consistent long-term decline, closely tied to the structural decay inherent in the product.
What Does the Dramatic Reversal in Fund Flows Reveal About Market Sentiment?
In the first quarter of 2026, SCO saw the largest inflow in its history. Data shows that traders poured a record $977 million into SCO in March—the biggest single-month inflow since the fund’s 2008 launch. This surge was driven by investors betting that the geopolitical risk premium from the U.S.-Iran conflict would fade and oil prices would retreat from war-driven highs.
However, this massive bearish bet did not pay off. During March, SCO’s price plunged 41%, marking its worst monthly performance in nearly six years. The simultaneous surge in capital inflows and steep price drop exemplifies a classic "buying into weakness" scenario.
By June, fund flows reversed dramatically. Investors withdrew about $220 million from SCO, the largest weekly outflow in the fund’s history. This occurred as the underlying index rose 2.2% over the same period. In terms of shares outstanding, SCO’s float fell from 53.21 million to 44.61 million, a week-over-week drop of 16.2%.
In just three months, SCO went from its largest-ever inflow to its largest-ever outflow. This dramatic reversal reflects the extreme uncertainty surrounding crude oil price trends and the intensity of capital flows in leveraged products during periods of heightened market sentiment.
How Do Oil Market Fundamentals Affect SCO’s Pricing?
SCO’s pricing ultimately depends on the trajectory of WTI crude oil prices, which are influenced by a range of fundamental factors. As of July 2, 2026, WTI crude was at $67.74 per barrel and Brent crude was at $70.80 per barrel, both hitting four-month lows.
Key factors currently weighing on oil prices include: progress in indirect U.S.-Iran talks in Qatar, with a focus on Hormuz Strait shipping and the unfreezing of Iranian assets; expectations that OPEC+ producers will raise output targets further in August; and, although global inventories are falling rapidly, the market is increasingly anticipating a supply recovery.
At the same time, potential bullish factors should not be overlooked: shipping through the Strait of Hormuz has not fully normalized; on July 2, UBS cut its Q3 Brent crude price forecast by $25 per barrel but noted that price risks remain skewed to the upside.
For SCO holders, this means the fund’s short-term performance will be highly sensitive to developments in geopolitical events. Any positive signals from U.S.-Iran negotiations could push oil prices lower, benefiting SCO; conversely, a breakdown in talks or an escalation in tensions could trigger an oil price rebound, putting pressure on SCO.
What Core Risks Should SCO Investors Watch?
First, directional risk. SCO is a highly directional instrument, with its price movement strongly inversely correlated to oil prices. If oil rises due to supply shocks, geopolitical escalation, or other factors, SCO will face direct net asset losses.
Second, volatility decay risk. Because leverage resets daily, SCO suffers additional structural decay in volatile markets. High volatility means greater compounding drag, so SCO’s performance in sideways or choppy markets may fall well short of investors’ linear expectations.
Third, time decay risk. SCO is not suitable for long-term holding. It is designed for intraday trading or very short-term tactical hedging, not as a core component of a long-term portfolio. The longer the holding period, the greater the structural erosion of net asset value.
Fourth, liquidity risk. While SCO generally has good liquidity under normal market conditions, bid-ask spreads may widen and execution prices may deviate from expectations during periods of extreme market volatility.
Fifth, tracking error risk. SCO achieves its investment objectives through a derivatives portfolio. Factors such as derivatives market liquidity, margin requirements, and roll costs can all cause the fund’s actual performance to deviate from its target.
Conclusion
SCO is a sophisticated yet structurally complex financial instrument. Its goal is to deliver twice the inverse daily performance of WTI crude oil prices, giving investors a tool to express bearish views on oil or hedge long oil exposure. However, daily leverage resets, compounding effects, volatility decay, and time decay create significant divergence between actual and intuitive performance.
SCO’s 2026 fund flow trajectory—from a record $977 million inflow in March to a $220 million outflow in June—vividly illustrates the intensity of capital battles in leveraged products amid shifting market sentiment. For investors considering SCO, understanding its mechanics, recognizing structural risks, and clarifying investment horizons and risk tolerance are essential for rational decision-making.
FAQ
Q: Is SCO suitable for long-term holding?
No. Due to the compounding effects and volatility decay from daily leverage resets, SCO’s actual returns will significantly diverge from the simple expectation of "twice the oil price decline" after just a few days. SCO is better suited for short-term trades or tactical hedging.
Q: How does SCO differ from directly shorting crude oil futures?
SCO achieves twice the inverse daily exposure through a derivatives portfolio, allowing investors to participate without opening a futures account. However, because SCO’s leverage resets daily, its long-term performance differs from directly holding a short futures position. Also, SCO does not directly hold physical oil or futures; its holdings are mainly cash equivalents and U.S. Treasuries.
Q: What are SCO’s fees?
SCO’s net expense ratio is 0.95%, which is standard for leveraged ETFs.
Q: How large is SCO’s asset base?
As of June 2026, SCO’s total assets under management were about $1.478 billion. Different sources may report figures between $887 million and $950 million, reflecting recent dramatic fund flows.
Q: What are the main factors influencing SCO’s price?
SCO’s price primarily depends on the daily movement of WTI crude oil. Geopolitical events (such as U.S.-Iran negotiations), OPEC+ production decisions, global oil inventory changes, and macroeconomic expectations all indirectly impact SCO by affecting oil prices. Additionally, market volatility levels influence SCO’s long-term performance through compounding effects.
