NEW YORK ( TheStreet) -- Shares of Amyris (Nasdaq: AMRS) were gapping down Wednesday morning with an open price 15.8% lower than Tuesday's closing price. The stock closed at $2.53 Tuesday and opened today's trading at $2.13. The average volume for Amyris has been 523,900 shares per day over the past 30 days. Amyris has a market cap of $139.1 million and is part of the health care sector and drugs industry. Shares are down 78.1% year to date as of the close of trading on Tuesday. Amyris, Inc., an integrated renewable products company, provides alternatives to a range of petroleum-sourced products used in specialty chemical and transportation fuel markets worldwide. TheStreet Ratings rates Amyris as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity, weak operating cash flow, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share. You can view the full Amyris Ratings Report. Get more investment ideas from our investment research center.