The US Department of Justice and the US Securities and Exchange Commission are probing Houston-based Hyperdynamics Corporation (NYSE:HDY) over the acquisition and retention of exploration rights in Guinea. Since last year, the US has been examining how iron-mining rights were awarded in the West African nation’s Simandou area. On last trading day Hyperdynamics Corporation (NYSE:HDY) ended up -58.37%lower to close at $2.19 while trading in the range of $1.13 – $2.42. Its return on assets (ROA) is -24.40%. Hyperdynamics Corporation (NYSE:HDY) monthly performance is -64.16%.

Plug Inc. (NASDAQ:PLUG) shares took a hit late Tuesday after short seller and analyst Andrew Left panned the company in a report, saying shares would be fairly valued at 50 cents due to the company’s lack of profitability and unique technology. Investing in Plug Power would be like playing in a casino, he added. Plug Power Inc. (NASDAQ:PLUG) in last trading activity ended up at $6.80 with day range of $5.32 – $7.40. Company weekly performance is 0.74% while its quarterly performance stands at 304.76%.Plug Power Inc. (NASDAQ:PLUG) is -41.98% away from its 52 week high.

FuelCell Energy (NASDAQ:FCEL) had its target price boosted by FBR Capital Markets from $1.45 to $2.50 in a report issued on Tuesday, Analyst Ratings Net reports. They currently have a market perform rating on the stock. FuelCell Energy Inc. (NASDAQ:FCEL) belongs to Utilities sector with market capitalization of 593.39 million and has 0.80% insider ownership. In last trading activity company’s stock closed at $3.37 while opening price was 2.99.

Shares of Capstone Turbine (NASDAQ:CPST) traded up 6% on Wednesday after Capstone raised their price target on the stock from $1.90 to $2.70, American Banking & Market News reports. The stock traded as high as $2.48 and last traded at $2.31, with a volume of 22,260,225 shares traded. The stock had previously closed at $2.18. On Wednesday shares of Capstone Turbine Corporation (NASDAQ:CPST) opened at $2.29 and closed at $2.32. This Year Company’s Earnings per Share (EPS) growth is -0.06 and next year’s estimated EPS growth is 120.00%. Analysts mean target price for Capstone Turbine Corporation (NASDAQ:CPST) is 2.06.

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