Short interest in Ionis Pharmaceuticals Inc (NASDAQ:IONS) increased during the last reporting period, rising from 9.87M to 10.74M. This put 7.94% of the company's publicly available shares short.

Short interest for Ionis Pharmaceuticals gives investors a sense of the degree to which investors are betting on the decline of Ionis Pharmaceuticals's stock. Short interest data is updated every two weeks.

Based on the recent average volume of 1.21M shares traded per day, it would take 8.88 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.