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 115 points (0.7%) at 16,388 as of Friday, Feb. 28, 2014, 11:55 AM ET. The NYSE advances/declines ratio sits at 1,987 issues advancing vs. 938 declining with 158 unchanged. The Basic Materials sector currently sits up 0.3% versus the S&P 500, which is up 0.6%. On the negative front, top decliners within the sector include Petroleo Brasileiro SA Petrobras ( PBR), down 2.4%, Freeport-McMoRan Copper & Gold ( FCX), down 1.9%, China Petroleum & Chemical Corporation ( SNP), down 1.3% and Valero Energy Corporation ( VLO), down 1.1%. Top gainers within the sector include Dril-Quip ( DRQ), up 12.6%, Halliburton Company ( HAL), up 2.4%, Imperial Oil ( IMO), up 2.1%, Cenovus Energy ( CVE), up 2.0% and Total ( TOT), up 1.8%. TheStreet would like to highlight 3 stocks pushing the sector lower today: 3. Companhia Siderurgica Nacional ( SID) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Companhia Siderurgica Nacional is down $0.29 (-6.1%) to $4.46 on average volume. Thus far, 3.0 million shares of Companhia Siderurgica Nacional exchanged hands as compared to its average daily volume of 5.6 million shares. The stock has ranged in price between $4.45-$4.58 after having opened the day at $4.56 as compared to the previous trading day's close of $4.75. Companhia Siderurgica Nacional operates as an integrated steel producer primarily in Brazil. The company principally produces carbon steel and various steel products for automotive, home appliance, packaging, construction, and steel processing industries. Companhia Siderurgica Nacional has a market cap of $6.6 billion and is part of the metals & mining industry. Shares are down 23.4% year-to-date as of the close of trading on Thursday. Currently there are no analysts that rate Companhia Siderurgica Nacional a buy, 2 analysts rate it a sell, and 1 rates it a hold. TheStreet Ratings rates Companhia Siderurgica Nacional as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, notable return on equity and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, generally higher debt management risk and weak operating cash flow. Get the full Companhia Siderurgica Nacional 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.