NEW YORK ( TheStreet) -- Shares of Omeros Corporation (Nasdaq: OMER) were gapping down Friday morning with an open price 39.9% lower than Thursday's closing price. The stock closed at $8 Thursday and opened today's trading at $4.81. The average volume for Omeros has been 75,800 shares per day over the past 30 days. Omeros has a market cap of $172.7 million and is part of the health care sector and drugs industry. Shares are down 2.9% year to date as of the close of trading on Thursday. Omeros Corporation, a clinical-stage biopharmaceutical company, engages in discovering, developing, and commercializing products focused on inflammation and disorders of the central nervous system. TheStreet Ratings rates Omeros as sell. The company's weaknesses can be seen in multiple areas, such as its feeble growth in its earnings per share and deteriorating net income. You can view the full Omeros 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.