NEW YORK ( TheStreet) -- NPS Pharmaceuticals (Nasdaq: NPSP) is trading at unusually high volume Friday with 2.4 million shares changing hands. It is currently at 4.2 times its average daily volume and trading down 93 cents (-11.5%) at $7.13 as of 3:30 p.m. ET. NPS has a market cap of $704.7 million and is part of the health care sector and drugs industry. Shares are up 21.4% year to date as of the close of trading on Thursday. NPS Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company, focuses on the development of therapeutic products for gastrointestinal and endocrine disorders, and various medical needs. TheStreet Ratings rates NPS as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, weak operating cash flow and generally disappointing historical performance in the stock itself. You can view the full NPS Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.