Short interest in Pacific Biosciences of California Inc (NASDAQ:PACB) increased during the last reporting period, rising from 52.14M to 54.38M. This put 21.05% of the company's publicly available shares short.

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

Based on the recent average volume of 8.87M shares traded per day, it would take 6.13 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.