Editor's Note: Any reference to TheStreet Ratings and its underlying recommendation does not reflect the opinion of TheStreet, Inc. or any of its contributors including Jim Cramer or Stephanie Link. Two out of the three major indices are trading lower today with the Dow Jones Industrial Average ( ^DJI) trading down 18 points (-0.1%) at 15,776 as of Monday, Feb. 10, 2014, 11:55 AM ET. The NYSE advances/declines ratio sits at 1,409 issues advancing vs. 1,532 declining with 144 unchanged. The Basic Materials sector currently sits up 0.1% versus the S&P 500, which is down 0.1%. On the negative front, top decliners within the sector include Boardwalk Pipeline Partners ( BWP), down 38.9%, ArcelorMittal ( MT), down 4.9%, Companhia Siderurgica Nacional ( SID), down 4.6%, YPF Sociedad Anonima ( YPF), down 4.1% and Gerdau ( GGB), down 3.1%. Top gainers within the sector include Agnico Eagle Mines ( AEM), up 5.4%, Silver Wheaton Corporation ( SLW), up 3.6%, Newmont Mining Corporation ( NEM), up 2.9%, Goldcorp ( GG), up 2.6% and Barrick Gold Corporation ( ABX), up 2.2%. TheStreet would like to highlight 5 stocks pushing the sector lower today: 5. Marathon Petroleum ( MPC) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Marathon Petroleum is down $1.99 (-2.4%) to $82.48 on light volume. Thus far, 1.0 million shares of Marathon Petroleum exchanged hands as compared to its average daily volume of 3.9 million shares. The stock has ranged in price between $82.48-$84.50 after having opened the day at $84.50 as compared to the previous trading day's close of $84.47. 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 $25.1 billion and is part of the energy industry. Shares are down 7.9% year-to-date as of the close of trading on Friday. Currently there are 8 analysts that rate Marathon Petroleum a buy, no analysts rate it a sell, and 3 rate it a hold. TheStreet Ratings rates Marathon Petroleum as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, attractive valuation levels and increase in stock price during the past year. We feel these strengths outweigh the fact that the company shows low profit margins. Get the full Marathon Petroleum Ratings Report now. STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.