NEW YORK ( TheStreet) -- Shares of Pacific Ethanol (Nasdaq: PEIX) were gapping down Friday morning with an open price 13.8% lower than Thursday's closing price. The stock closed at 94 cents Thursday and opened today's trading at 81 cents. The average volume for Pacific Ethanol has been 4.2 million shares per day over the past 30 days. Pacific Ethanol has a market cap of $85.9 million and is part of the basic materials sector and chemicals industry. Shares are down 6.6% year to date as of the close of trading on Thursday. Pacific Ethanol, Inc. produces and markets low carbon renewable fuels in the United States. The company has a P/E ratio of 19.8, equal to the average chemicals industry P/E ratio and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Pacific Ethanol as a sell. The company's weaknesses can be seen in multiple areas, such as its generally disappointing historical performance in the stock itself, generally weak debt management and poor profit margins. You can view the full Pacific Ethanol Ratings Report. Get more investment ideas from our investment research center.