The British government has urged the U.S. Supreme Court to review appeals court rulings against BP plc (NYSE:BP) over a 2010 Gulf of Mexico oil spill that produced one of the largest class actions in American history. BP plc (NYSE:BP) belongs to Basic Materials sector. Its net profit margin is 2.70% and weekly performance is -5.25%. On last trading day company shares ended up $45.33. BP plc (NYSE:BP) distance from 50-day simple moving average (SMA50) is -8.06%.

Acorn Energy, Inc. (NASDAQ:ACFN) announced that it has received another order for its Underwater Security System for the protection of a Nuclear Power Plant.  Acorn Energy, Inc. (NASDAQ:ACFN) shares increased 16.87% in last trading session and ended the day at $1.94. ACFN Gross Margin is 20.50% and its return on assets is -60.20%. Acorn Energy, Inc. (NASDAQ:ACFN) quarterly performance is -11.42%.

On 31 Aug 2014 Shares of Sigma-Aldrich (NASDAQ:SIAL) have earned an average recommendation of “Hold” from the ten analysts that are presently covering the company, Stock Ratings Network reports. Two investment analysts have rated the stock with a sell recommendation, seven have issued a hold recommendation and one has given a buy recommendation to the company. The average 12-month target price among brokers that have issued a report on the stock in the last year is $92.33. On 08 September, Sigma-Aldrich Corporation (NASDAQ:SIAL) shares fell -0.13% and was closed at $103.74. SIAL EPS growth in last 5 year was 8.90%. Sigma-Aldrich Corporation (NASDAQ:SIAL) year to date (YTD) performance is 11.13%.

Equities research analysts at JPMorgan Chase & Co. started coverage on shares of Harmony Gold Mining Co. (NYSE:HMY) in a research note issued to investors on Monday, TheFlyOnTheWall.com reports. The firm set a “neutral” rating on the stock. Harmony Gold Mining Company Limited (NYSE:HMY) ended the last trading day at $2.68. Company weekly volatility is calculated as 2.93%and price to cash ratio as 5.98. Harmony Gold Mining Company Limited (NYSE:HMY) showed a weekly performance of -11.84%.

On 12 Aug 2014 Trevena, Inc. (NASDAQ:TRVN), a clinical stage biopharmaceutical company focused on the discovery and development of G protein coupled receptor (GPCR) biased ligands, today announced financial results for the quarter ended June 30, 2014. Trevena, Inc. (NASDAQ:TRVN) shares increased 1.71% in last trading session and ended the day on $5.95. its return on assets is -54.00%. Trevena, Inc. (NASDAQ:TRVN) quarterly performance is 33.41%.