NEW YORK ( TheStreet) -- Shares of Dendreon (Nasdaq: DNDN) were gapping down Thursday morning with an open price 13.5% lower than Wednesday's closing price. The stock closed at $10.87 Wednesday and opened today's trading at $9.40. The average volume for Dendreon has been 8.9 million shares per day over the past 30 days. Dendreon has a market cap of $2.08 billion and is part of the health care sector and drugs industry. Shares are up 36.3% year to date as of the close of trading on Wednesday. Dendreon Corporation, a biotechnology company, engages in the discovery, development, and commercialization of therapeutics to enhance cancer treatment options for patients. The company offers active cellular immunotherapy and small molecule product candidates to treat various cancers. TheStreet Ratings rates Dendreon as a sell. The company's weaknesses can be seen in multiple areas, such as its disappointing return on equity and generally disappointing historical performance in the stock itself. You can view the full Dendreon Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping down? Get free SMS text alerts sent to you when the action happens by texting DOWN to 95370 or select from multiple alert options.