SPDR S&P Biotech ETF (XBI) Short Interest Ratio & Short Volume

Short interest is the volume of SPDR S&P Biotech ETF shares that have been sold short but have not yet been covered or closed out. As of May 15th, investors have sold 73,560,000 shares of XBI short. Learn More on SPDR S&P Biotech ETF's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. XBI shares currently have a short interest ratio of 6.0. Learn More on SPDR S&P Biotech ETF's short interest ratio.

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of SPDR S&P Biotech ETF: Quaker Wealth Management LLC, Jane Street Group LLC, Goldman Sachs Group Inc., Parallax Volatility Advisers L.P., Polar Asset Management Partners Inc., K2 Principal Fund L.P., Nantahala Capital Management LLC, Cubist Systematic Strategies LLC, Royal Bank of Canada, Caption Management LLC, Nomura Holdings Inc., Twin Tree Management LP, HAP Trading LLC, BNP Paribas Financial Markets, Eisler Capital Management Ltd., PEAK6 LLC, Affinity Asset Advisors LLC, Walleye Trading LLC, Walleye Capital LLC, Capital Fund Management S.A., Raymond James Financial Inc., Citigroup Inc., Valeo Financial Advisors LLC, and FNY Investment Advisers LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

SPDR S&P Biotech ETF saw a increase in short interest in May. As of May 15th, there was short interest totaling 73,560,000 shares, an increase of 1.1% from the previous total of 72,740,000 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 SPDR S&P Biotech ETF: iShares U.S. Medical Devices ETF (2.75%), iShares Biotechnology ETF (29.39%), iShares Global Healthcare ETF (0.11%), iShares U.S. Healthcare ETF (1.09%), Fidelity MSCI Health Care Index ETF (0.03%), First Trust NYSE Arca Biotechnology Index Fund (0.08%), First Trust Health Care AlphaDEX Fund (0.14%), Invesco S&P 500 Equal Weight Health Care ETF (1.31%), VanEck Pharmaceutical ETF (41.19%), iShares U.S. Pharmaceuticals ETF (4.51%),

As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($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 XBI is an investing strategy that aims to generate trading profit from SPDR S&P Biotech ETF as its price is falling. XBI shares are trading up $0.08 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 SPDR S&P Biotech ETF occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of XBI, 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 XBI, twice per month. The most recent reporting period available is May, 15 2025.