NEW YORK ( TheStreet) -- Shares of Momenta Pharmaceuticals (Nasdaq: MNTA) were gapping down Tuesday morning with an open price 12.8% lower than Monday's closing price. The stock closed at $13.96 Monday and opened today's trading at $12.17. The average volume for Momenta has been 1.1 million shares per day over the past 30 days. Momenta has a market cap of $682.7 million and is part of the health care sector and drugs industry. Shares are down 6.7% year to date as of the close of trading on Monday. Momenta Pharmaceuticals, Inc., a biotechnology company, specializes in the in the characterization and process engineering of complex molecules. These complex molecules include proteins; polypeptides; and cell surface polysaccharides, such as heparan-sulfate proteoglycans (HSPGs). The company has a P/E ratio of 3.4, equal to the average drugs industry P/E ratio and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Momenta as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures and notable return on equity. However, as a counter to these strengths, we find that the stock has had a generally disappointing performance in the past year. You can view the full Momenta 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.