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 39 points (0.2%) at 17,686 as of Tuesday, Nov. 18, 2014, 11:55 AM ET. The NYSE advances/declines ratio sits at 1,967 issues advancing vs. 1,008 declining with 165 unchanged. The Basic Materials sector currently sits up 0.3% versus the S&P 500, which is up 0.4%. Top gainers within the sector include Potash Corp of Saskatchewan ( POT), up 5.8%, Barrick Gold ( ABX), up 3.7%, Agrium ( AGU), up 3.4%, Energy Transfer Equity ( ETE), up 2.8% and Air Products & Chemicals ( APD), up 2.1%. TheStreet would like to highlight 3 stocks pushing the sector lower today: 3. PetroChina ( PTR) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, PetroChina is down $1.73 (-1.5%) to $110.29 on average volume. Thus far, 58,190 shares of PetroChina exchanged hands as compared to its average daily volume of 142,800 shares. The stock has ranged in price between $109.78-$110.65 after having opened the day at $110.44 as compared to the previous trading day's close of $112.02. STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more. PetroChina Company Limited produces and sells oil and gas in the People's Republic of China. The company operates in four segments: Exploration and Production, Refining and Chemicals, Marketing, and Natural Gas and Pipeline. PetroChina has a market cap of $209.0 billion and is part of the energy industry. Shares are up 2.1% year-to-date as of the close of trading on Monday. Currently there are 2 analysts that rate PetroChina a buy, no analysts rate it a sell, and 1 rates it a hold. TheStreet Ratings rates PetroChina as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, attractive valuation levels, good cash flow from operations, 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 sub par growth in net income. Get the full PetroChina 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.