NEW YORK ( TheStreet) -- Pharmacyclics Incorporated (Nasdaq: PCYC) is trading at unusually high volume Friday with three million shares changing hands. It is currently at four times its average daily volume and trading down $2.39 (-16.4%) at $12.23 as of 12:15 p.m. ET. Pharmacyclics has a market cap of $1.03 billion and is part of the health care sector and drugs industry. Shares are up 140.5% year to date as of the close of trading on Thursday. Pharmacyclics, Inc. operates as a clinical-stage biopharmaceutical company focusing on discovering, developing, and commercializing small-molecule drugs for the treatment of cancer and immune mediated diseases. TheStreet Ratings rates Pharmacyclics as a sell. The company's weaknesses can be seen in multiple areas, such as its feeble growth in its earnings per share, deteriorating net income, disappointing return on equity and weak operating cash flow. You can view the full Pharmacyclics Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.