Short interest in ProShares UltraShort Nasdaq Biotechnology (NASDAQ:BIS) increased during the last reporting period, rising from 5.41K to 6.62K. This put -% of the company's publicly available shares short.

Based on the recent average volume of 12.54K shares traded per day, it would take 1 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.