NEW YORK ( TheStreet) -- Shares of Dyax Corporation (Nasdaq: DYAX) were gapping down Tuesday morning with an open price 13.1% lower than Monday's closing price. The stock closed at $1.99 Monday and opened today's trading at $1.73. The average volume for Dyax has been 632,500 shares per day over the past 30 days. Dyax has a market cap of $200.4 million and is part of the health care sector and drugs industry. Shares are down 5.1% year to date as of the close of trading on Monday. Dyax Corp., a biopharmaceutical company, engages in the discovery, development, and commercialization of biotherapeutics for unmet medical needs with an emphasis on inflammatory and oncology indications. TheStreet Ratings rates Dyax as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share. You can view the full Dyax 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.