3. As of noon trading, Marathon Petroleum ( MPC) is down $4.38 (-5.3%) to $78.03 on heavy volume Thus far, 4.6 million shares of Marathon Petroleum exchanged hands as compared to its average daily volume of 3.7 million shares. The stock has ranged in price between $76.85-$81.63 after having opened the day at $79.93 as compared to the previous trading day's close of $82.41. Marathon Petroleum Corporation, together with its subsidiaries, engages in refining, transporting, and marketing petroleum products primarily in the United States. It operates through Refining & Marketing, Speedway, and Pipeline Transportation segments. Marathon Petroleum has a market cap of $27.0 billion and is part of the basic materials sector. The company has a P/E ratio of 8.3, below the S&P 500 P/E ratio of 17.7. Shares are up 29.1% year to date as of the close of trading on Monday. TheStreet Ratings rates Marathon Petroleum as a hold. The company's strengths can be seen in multiple areas, such as its notable return on equity, revenue growth and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we find that the company's profit margins have been poor overall. Get the full Marathon Petroleum Ratings Report now. Exclusive Offer: Jim Cramer's 'go-to' small/mid-cap guru Bryan Ashenberg only buys stocks he thinks could return 50-100%. See his top picks for 14-days FREE.