Alexion Pharmaceuticals (ALXN) Short Interest Ratio & Short Volume

Short interest is the volume of Alexion Pharmaceuticals shares that have been sold short but have not yet been closed out or covered. As of June 30th, investors have sold 9,800,000 shares of ALXN short. 4.45% of Alexion Pharmaceuticals' shares are currently sold short. Learn More on Alexion Pharmaceuticals' 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. ALXN shares currently have a short interest ratio of 4.0. Learn More on Alexion Pharmaceuticals's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 4.45% of Alexion Pharmaceuticals' floating shares are currently sold short.

Alexion Pharmaceuticals saw a increase in short interest during the month of June. As of June 30th, there was short interest totaling 9,800,000 shares, an increase of 14.6% from the previous total of 8,550,000 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.

Alexion Pharmaceuticals currently has issued a total of 221,019,000 shares. Some of Alexion Pharmaceuticals' outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Alexion Pharmaceuticals currently has a public float of 220,310,000 shares.

4.45% of Alexion Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to Alexion Pharmaceuticals: Amgen Inc. (2.71%), Gilead Sciences, Inc. (1.62%), Vertex Pharmaceuticals Incorporated (1.70%), Regeneron Pharmaceuticals, Inc. (2.57%), Alnylam Pharmaceuticals, Inc. (2.40%), Biogen Inc. (2.37%), United Therapeutics Co. (3.77%), Incyte Co. (3.90%), BioMarin Pharmaceutical Inc. (2.72%), Exelixis, Inc. (6.85%),

As of the most recent reporting period, the following stocks had the largest short interest positions: Advanced Micro Devices, Inc. ($8.32 billion), AstraZeneca PLC ($8.20 billion), Block, Inc. ($7.79 billion), Analog Devices, Inc. ($7.16 billion), S&P Global Inc. ($7.07 billion), Aon plc ($6.17 billion), Charter Communications, Inc. ($5.38 billion), Wayfair Inc. ($4.80 billion), AMC Entertainment Holdings, Inc. ($4.28 billion), and Snowflake Inc. ($3.19 billion). View all of the most shorted stocks.

Short selling ALXN is an investing strategy that aims to generate trading profit from Alexion Pharmaceuticals as its price is falling. 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 Alexion Pharmaceuticals 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 ALXN, 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 ALXN, twice per month. The most recent reporting period available is June, 30 2021.