In the latest close session, Marathon Petroleum (MPC) was up +1.13% at $167.57. The stock's change was more than the S&P 500's daily gain of 0.8%. At the same time, the Dow added 0.94%, and the tech-heavy Nasdaq gained 0.97%. The refiner's shares have seen an increase of 4.46% over the last month, surpassing the Oils-Energy sector's gain of 3.8% and falling behind the S&P 500's gain of 5.12%.The investment community will be paying close attention to the earnings performance of Marathon Petroleum in its upco ...