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 down today with the Dow Jones Industrial Average ( ^DJI) trading down 27 points (-0.2%) at 15,858 as of Tuesday, Dec. 17, 2013, 11:55 AM ET. The NYSE advances/declines ratio sits at 997 issues advancing vs. 1,953 declining with 153 unchanged. The Basic Materials sector currently sits down 0.5% versus the S&P 500, which is down 0.5%. On the negative front, top decliners within the sector include CGG ( CGG), down 16.9%, Tenaris ( TS), down 3.1%, BP ( BP), down 1.5%, Schlumberger ( SLB), down 1.2% and Exxon Mobil Corporation ( XOM), down 1.1%. Top gainers within the sector include Pembina Pipeline ( PBA), up 4.0%, Williams Companies ( WMB), up 3.3% and Ultrapar Holdings ( UGP), up 2.8%. TheStreet would like to highlight 5 stocks pushing the sector lower today: 5. China Petroleum & Chemical Corporation ( SNP) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, China Petroleum & Chemical Corporation is down $0.88 (-1.1%) to $82.38 on light volume. Thus far, 20,626 shares of China Petroleum & Chemical Corporation exchanged hands as compared to its average daily volume of 101,400 shares. The stock has ranged in price between $82.04-$82.80 after having opened the day at $82.16 as compared to the previous trading day's close of $83.26. China Petroleum & Chemical Corporation, an energy and chemical company, through its subsidiaries, engages in the oil and gas, and chemical operations in the People's Republic of China. China Petroleum & Chemical Corporation has a market cap of $97.6 billion and is part of the energy industry. The company has a P/E ratio of 17.1, below the S&P 500 P/E ratio of 17.7. Shares are down 27.5% year to date as of the close of trading on Monday. Currently there is 1 analyst that rates China Petroleum & Chemical Corporation a buy, no analysts rate it a sell, and 1 rates it a hold. TheStreet Ratings rates China Petroleum & Chemical Corporation as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, compelling growth in net income, attractive valuation levels, impressive record of earnings per share growth and notable return on equity. We feel these strengths outweigh the fact that the company shows low profit margins. Get the full China Petroleum & Chemical Corporation 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.