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 down today with the Dow Jones Industrial Average ( ^DJI) trading down 20 points (-0.2%) at 12,795 as of Monday, Nov. 12, 2012, 11:49 AM ET. The NYSE advances/declines ratio sits at 1,283 issues advancing vs. 1,555 declining with 129 unchanged. The Basic Materials sector currently sits up 0.1% versus the S&P 500, which is down 0.1%. Top gainers within the sector include Emerald Oil ( EOX), up 298.4%, Titanium Metals Corporation ( TIE), up 42.3%, Kronos Worldwide ( KRO), up 10.6%, Valhi Incorporated ( VHI), up 4.1% and Nexen ( NXY), up 2.0%. On the negative front, top decliners within the sector include SandRidge Energy ( SD), down 6.7%, NuStar Energy L.P ( NS), down 6.2%, Plains All American Pipeline ( PAA), down 3.5%, Enterprise Products Partners ( EPD), down 2.8% and Randgold Resources ( GOLD), down 1.7%. TheStreet Ratings group would like to highlight 5 stocks pushing the sector higher today: 5. PetroChina ( PTR) is one of the companies pushing the Basic Materials sector higher today. As of noon trading, PetroChina is up $0.96 (0.7%) to $133.41 on light volume Thus far, 21,522 shares of PetroChina exchanged hands as compared to its average daily volume of 135,800 shares. The stock has ranged in price between $133.08-$133.86 after having opened the day at $133.19 as compared to the previous trading day's close of $132.45. 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 $242.2 billion and is part of the energy industry. The company has a P/E ratio of 1.7, below the S&P 500 P/E ratio of 17.7. Shares are up 6.4% year to date as of the close of trading on Friday. Currently there are 3 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 and attractive valuation levels. We feel these strengths outweigh the fact that the company has had somewhat weak growth in earnings per share. Get the full PetroChina Ratings Report now.