NEW YORK ( TheStreet) -- Shares of Oncothyreon (Nasdaq: ONTY) were gapping down Tuesday morning with an open price 35.6% lower than Monday's closing price. The stock closed at $8.41 Monday and opened today's trading at $5.42. The average volume for Oncothyreon has been 769,100 shares per day over the past 30 days. Oncothyreon has a market cap of $269.8 million and is part of the health care sector and drugs industry. Shares are up 10.9% year to date as of the close of trading on Monday. Oncothyreon Inc., a clinical-stage biopharmaceutical company, focuses on the development of therapeutic products for the treatment of cancer. Its primary product candidate, Stimuvax is in Phase III clinical trials for the treatment of non-small cell lung cancer. TheStreet Ratings rates Oncothyreon as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity and poor profit margins. You can view the full Oncothyreon 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.