Affymax (AFFY) Short Interest Ratio & Short Volume

Short interest is the volume of Affymax shares that have been sold short but have not yet been covered or closed out. As of June 30th, traders have sold 32,800 shares of AFFY short. Learn More on Affymax'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. AFFY shares currently have a short interest ratio of 5.0. Learn More on Affymax's short interest ratio.

Here is how the short interest of companies in the industry of "biotechnology" compare to Affymax: Amgen Inc. (2.75%), Gilead Sciences, Inc. (1.69%), Vertex Pharmaceuticals Incorporated (1.50%), Regeneron Pharmaceuticals, Inc. (2.16%), Alnylam Pharmaceuticals, Inc. (2.59%), Biogen Inc. (2.74%), United Therapeutics Corporation (0.19%), Incyte Corporation (3.82%), Neurocrine Biosciences, Inc. (3.75%), Exelixis, Inc. (7.34%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($72.10 billion), Invesco QQQ ($26.89 billion), iShares Russell 2000 ETF ($19.61 billion), MicroStrategy Incorporated ($9.52 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), WD-40 Company ($7.66 billion), Technology Select Sector SPDR Fund ($6.10 billion), Invesco S&P 500 Equal Weight ETF ($5.80 billion), Invesco S&P 500 Top 50 ETF ($5.53 billion), and Vanguard Large-Cap ETF ($5.35 billion). View all of the most shorted stocks.

Short selling AFFY is an investing strategy that aims to generate trading profit from Affymax 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 Affymax 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 AFFY, 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 AFFY, twice per month. The most recent reporting period available is June, 30 2025.