Editor's Note: TheStreet ratings do not represent the views of TheStreet's staff or its contributors. Ratings are established by computer based on metrics for performance (which includes growth, stock performance, efficiency and valuation) and risk (volatility and solvency). Companies with poor cash flow or high debt levels tend to earn lower ratings in our model All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 79 points (0.5%) at 15,467 as of Wednesday, May 22, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,746 issues advancing vs. 1,183 declining with 133 unchanged. The Basic Materials sector currently sits up 0.6% versus the S&P 500, which is up 0.5%. Top gainers within the sector include Kinross Gold Corporation ( KGC), up 7.1%, Pioneer Natural Resources Company ( PXD), up 4.8%, Chesapeake Energy ( CHK), up 2.7%, Ecopetrol S.A ( EC), up 2.0% and Energy Transfer Equity ( ETE), up 1.5%. On the negative front, top decliners within the sector include Potash Corporation of Saskatchewan ( POT), down 1.00, PetroChina ( PTR), down 1.14, Petroleo Brasileiro SA Petrobras ( PBR.A), down 1.16, EOG Resources ( EOG), down 0.60 and Monsanto Company ( MON), down 0.59. TheStreet Ratings group would like to highlight 5 stocks pushing the sector higher today: 5. Southern Copper Corporation ( SCCO) is one of the companies pushing the Basic Materials sector higher today. As of noon trading, Southern Copper Corporation is up $0.57 (1.74) to $33.40 on average volume Thus far, 1.2 million shares of Southern Copper Corporation exchanged hands as compared to its average daily volume of 2.0 million shares. The stock has ranged in price between $33.08-$33.92 after having opened the day at $33.09 as compared to the previous trading day's close of $32.83. Southern Copper Corporation engages in mining, exploring, producing, smelting, and refining copper and other minerals in Peru, Mexico, and Chile. Southern Copper Corporation has a market cap of $27.8 billion and is part of the metals & mining industry. The company has a P/E ratio of 15.4, below the S&P 500 P/E ratio of 17.7. Shares are down 13.3% year to date as of the close of trading on Tuesday. Currently there is 1 analyst that rates Southern Copper Corporation a buy, 1 analyst rates it a sell, and 6 rate it a hold. TheStreet Ratings rates Southern Copper Corporation as a buy. The company's strengths can be seen in multiple areas, such as its expanding profit margins, increase in stock price during the past year, largely solid financial position with reasonable debt levels by most measures and notable return on equity. We feel these strengths outweigh the fact that the company has had somewhat weak growth in earnings per share. Get the full Southern Copper Corporation 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.