ProShares Ultra S&P500 (SSO) Short Interest Ratio & Short Volume

Short interest is the volume of ProShares Ultra S&P500 shares that have been sold short but have not yet been covered or closed out. As of May 15th, traders have sold 1,790,000 shares of SSO short. Learn More on ProShares Ultra S&P500's current short interest.

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of ProShares Ultra S&P500: Jane Street Group LLC, and Parallax Volatility Advisers L.P.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

ProShares Ultra S&P500 saw a increase in short interest in May. As of May 15th, there was short interest totaling 1,790,000 shares, an increase of 10.5% from the previous total of 1,620,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

Here is how the short interest of companies compare to ProShares Ultra S&P500: Vanguard Russell 1000 ETF (0.82%), iShares Global 100 ETF (0.23%), iShares China Large-Cap ETF (46.40%), Schwab Fundamental Emerging Markets Equity ETF (0.05%), JPMorgan Global Select Equity ETF (0.01%), Direxion Daily S&P 500 Bull 3x Shares (5.77%), Vanguard S&P 500 Value ETF (0.58%), Invesco S&P 500 Low Volatility ETF (3.06%), Avantis U.S. Large Cap Value ETF (0.07%), Invesco RAFI US 1000 ETF (0.01%),

As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), MicroStrategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Corporation ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks.

Short selling SSO is an investing strategy that aims to generate trading profit from ProShares Ultra S&P500 as its price is falling. SSO shares are trading up $1.23 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for ProShares Ultra S&P500 occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of SSO, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including SSO, twice per month. The most recent reporting period available is May, 15 2025.