NEW YORK ( TheStreet) -- Shares of Energy Conversion Devices (Nasdaq: ENER) were gapping down Friday morning with an open price 22.2% lower than Thursday's closing price. The stock closed at $3.16 Thursday and opened today's trading at $2.46. The average volume for Energy Conversion Devices has been 1.6 million shares per day over the past 30 days. Energy Conversion Devices has a market cap of $182.1 million and is part of the technology sector and electronics industry. Shares are down 31.3% year to date as of the close of trading on Thursday. Energy Conversion Devices, Inc. engages in the design, manufacture, and sale of photovoltaic (PV) products. The company operates in two segments, United Solar Ovonic and Ovonic Materials. TheStreet Ratings rates Energy Conversion Devices as sell. The company's weaknesses can be seen in multiple areas, such as its disappointing return on equity, poor profit margins and generally disappointing historical performance in the stock itself. You can view the full Energy Conversion Devices Ratings Report. Get more investment ideas from our investment research center.