Energy Conversion (Nasdaq: ENER) filed for Chapter 11 bankruptcy protection.
Auriga Securities analyst Hari Chandra downgraded Yingli Green Energy (NYSE: YGE) to a Hold rating.
Zipcar (Nasdaq: ZIP) swung to a better than expected profit for the fourth quarter but the company warned of wider than expected losses for the first quarter.
In the broad market, declining issues outpaced advancers by a margin of nearly 5 to 2 on the NYSE and by more than 2 to 1 on Nasdaq. The Russell 2000 which tracks small cap stocks lost 6 points to 818.