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. All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 44 points (0.3%) at 15,464 as of Tuesday, Aug. 13, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,183 issues advancing vs. 1,800 declining with 78 unchanged. The Basic Materials sector currently sits down 0.4% versus the S&P 500, which is up 0.2%. On the negative front, top decliners within the sector include Valspar Corporation ( VAL), down 7.3%, Southern Copper Corporation ( SCCO), down 4.0%, Barrick Gold Corporation ( ABX), down 2.9%, Newmont Mining Corporation ( NEM), down 3.0% and Continental Resources ( CLR), down 2.5%. Top gainers within the sector include Schlumberger ( SLB), up 2.5%, Monsanto Company ( MON), up 1.6%, Halliburton Company ( HAL), up 1.4%, Dow Chemical ( DOW), up 1.4% and ConocoPhillips ( COP), up 1.4%. TheStreet would like to highlight 5 stocks pushing the sector lower today: 5. Talisman Energy ( TLM) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Talisman Energy is down $0.34 (-3.1%) to $10.74 on average volume. Thus far, 2.3 million shares of Talisman Energy exchanged hands as compared to its average daily volume of 3.8 million shares. The stock has ranged in price between $10.72-$11.04 after having opened the day at $11.04 as compared to the previous trading day's close of $11.08. Talisman Energy Inc., an upstream oil and gas company, engages in the exploration, development, production, transportation, and marketing of crude oil, natural gas, and natural gas liquids. Talisman Energy has a market cap of $11.6 billion and is part of the energy industry. Shares are down 2.2% year to date as of the close of trading on Monday. Currently there are 5 analysts that rate Talisman Energy a buy, no analysts rate it a sell, and 12 rate it a hold. TheStreet Ratings rates Talisman Energy as a sell. The company's weaknesses can be seen in multiple areas, such as its feeble growth in its earnings per share, deteriorating net income, disappointing return on equity, weak operating cash flow and generally high debt management risk. Get the full Talisman Energy 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.