Short interest in Pacific Biosciences of California Inc (NASDAQ:PACB) increased during the last reporting period, rising from 41.39M to 45.63M. This put 17.19% of the company's publicly available shares short.

Based on the recent average volume of 5.43M shares traded per day, it would take 8.41 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.