Notable Ups And Down: Petroleo Brasileiro Petrobras SA (ADR) (NYSE:PBR), Schlumberger Limited (NYSE:SLB), Ophthotech Corporation (NASDAQ:OPHT), Royal Dutch Shell (NYSE:RDS-A), Citigroup (NYSE:C)

Petroleo Brasileiro Petrobras SA (NYSE:PBR) was the recipient of a significant drop in short interest during the month of November. As of November 14th, there was short interest totalling 88,765,318 shares, a drop of 5.1% from the October 31st total of 93,559,567 shares, StockRatingsNetwork.com reports. Petroleo Brasileiro Petrobras SA (ADR) (NYSE:PBR) belongs to Basic Materials sector. Its net profit margin is 6.20% and weekly performance is -17.19%. On last trading day company shares ended up $6.02. Petroleo Brasileiro Petrobras SA (ADR) (NYSE:PBR) distance from 50-day simple moving average (SMA50) is -34.75%.

Schlumberger Limited (NYSE:SLB) remains one of the stronger oil and gas service companies despite pressures stemming from falling commodity prices and geopolitical disruptions around the world, says Edward C. Muztafago, Director of Investment Research at Societe Generale. Schlumberger Limited (NYSE:SLB) shares moved down -1.96% in last trading session and ended the day at $81.72. SLB Gross Margin is 22.70% and its return on assets is 10.10%. Schlumberger Limited (NYSE:SLB) quarterly performance is -16.70%.

Ophthotech Corp (NASDAQ:OPHT) CEO David R. Guyer sold 15,034 shares of Ophthotech Corp stock in a transaction dated Friday, January 2nd. The stock was sold at an average price of $45.34, for a total value of $681,641.56. Ophthotech Corporation (NASDAQ:OPHT) ended the last trading day at $46.41. Company weekly volatility is calculated as 3.96% and price to cash ratio as 3.82. Ophthotech Corporation (NASDAQ:OPHT) showed a weekly performance of 5.48%.

European oil giant Royal Dutch Shell Plc(NYSE:RDS-A) has reportedly agreed to pay a total of about $84 million or 55 million pounds to around 15,600 Nigerian fishermen who were affected by two oil spills in 2008 and 2009 in the Niger Delta. Royal Dutch Shell plc (NYSE:RDS-A) belongs to Basic Materials sector. Its net profit margin is 3.70% and weekly performance is -7.74%. On last trading day company shares ended up $63.02. Royal Dutch Shell plc (NYSE:RDS-A) distance from 50-day simple moving average (SMA50) is -7.53%.

Citigroup Inc. (NYSE:C) announced the expiration and final tender results of its previously announced cash tender offers respect to each series of notes listed in the table below (the “Notes”). Citigroup Inc. (NYSE:C) shares fell -3.52% in last trading session and ended the day at $50.70. C return on assets is 0.50%. Citigroup Inc. (NYSE:C) quarterly performance is -3.00%.