Afternoon Market Losers

tumbled 19.11% to $14.35 after the company lowered its Q2 revenue outlook.

plunged 17.88% to touch a new 52-week low of $89.42 after the company issued downbeat Q2 revenue forecast.

dropped 14.58% to $2.93 after the company announced disappointing results of Plawce-2 well test.\

dipped 9.49% to $27.38 after Goldman Sachs downgraded the company from Neutral to Sell.

traded down 8.59% to $5.64 after the company announced a public offering of 21.7 million American Depositary Shares.

dropped 8.37% to $11.28 after the company announced that it was selected by Argand Energy Solutions for a 2.3MW solar power project in Louisburg, North Carolina.