NEW YORK ( TheStreet) -- Shares of Metabolix (Nasdaq: MBLX) were gapping down Friday morning with an open price 56.6% lower than Thursday's closing price. The stock closed at $5.99 Thursday and opened today's trading at $2.60. The average volume for Metabolix has been 237,200 shares per day over the past 30 days. Metabolix has a market cap of $172.6 million and is part of the basic materials sector and chemicals industry. Shares are down 62.9% year to date as of the close of trading on Thursday. Metabolix, Inc., a bioscience company, develops and commercializes technologies for the production of polymers and chemicals in plants and in microbes. It offers a proprietary microbial fermentation system to produce a family of polymers known as polyhydroxyalkanoates under the Mirel brand. TheStreet Ratings rates Metabolix as a sell. The company's weaknesses can be seen in multiple areas, such as its generally disappointing historical performance in the stock itself and weak operating cash flow. You can view the full Metabolix 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.