Bank of America upgraded shares of Gerdau SA (NYSE:GGB) from a neutral rating to a buy rating in a report issued on Thursday, TheFlyOnTheWall.com reports. Gerdau S.A. (NYSE:GGB) belongs to Basic Materials sector. Its net profit margin is 3.50% and weekly performance is -3.93%. On last trading day company shares ended up $3.42. Gerdau S.A. (NYSE:GGB) distance from 50-day simple moving average (SMA50) is -14.82%.

On Dec. 17, Marathon Oil Corporation (NYSE:MRO) announced that the Company anticipates its 2015 capital, investment and exploration budget will be approximately $4.3-4.5 billion, or about 20 percent lower than 2014 levels, excluding its recently disposed Norway business. Marathon Oil Corporation (NYSE:MRO) shares advanced 1.10% in last trading session and ended the day at $28.60. MRO Gross Margin is 64.10% and its return on assets is 6.90%. Marathon Oil Corporation (NYSE:MRO) quarterly performance is -21.99%.

Spectrum Brands Holdings (NYSE:SPB) Insider Harbinger Group Inc. (NYSE:HRG) purchased 42,497 shares of Spectrum Brands Holdings stock in a transaction that occurred on Monday, December 8th. The shares were purchased at an average cost of $94.81 per share, for a total transaction of $4,029,140.57. Harbinger Group Inc. (NYSE:HRG) ended the last trading day at $13.93. Company weekly volatility is calculated as 1.80% and price to cash ratio as 2.12. Harbinger Group Inc. (NYSE:HRG) showed a weekly performance of -0.36%.

The Boeing Company (NYSE:BA) on Friday announced it has delivered four Next Generation 737-800 aircraft to Beijing-based Dragon Aviation Leasing. The Boeing Company (NYSE:BA) belongs to Industrial Goods sector. Its net profit margin is 5.80% and weekly performance is -0.98%. On last trading day company shares ended up $129.95. The Boeing Company (NYSE:BA) distance from 50-day simple moving average (SMA50) is 1.81%.

HollyFrontier Corporation (NYSE: HFC) announced its expectation of a lower of cost or market (LOCM) Inventory adjustment resulting in a pre-tax income statement charge between $350 and $400 million for the year due to more than a 45% decline in crude price experienced in the fourth quarter 2014. The actual LOCM adjustment will be determined considering many factors including any change in crude price that may occur prior to the release of fourth quarter earnings. HollyFrontier also announces an update on the status of the El Dorado Refinery turnaround. HollyFrontier Corporation (NYSE:HFC) shares moved up 2.56% in last trading session and ended the day at $38.44. HFC Gross Margin is 12.00% and its return on assets is 5.50%. HollyFrontier Corporation (NYSE:HFC) quarterly performance is -8.69%.