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 up today with the Dow Jones Industrial Average ( ^DJI) trading up 47 points (0.3%) at 15,382 as of Tuesday, May 21, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,570 issues advancing vs. 1,367 declining with 136 unchanged. The Energy industry currently sits up 0.2% versus the S&P 500, which is up 0.2%. A company within the industry that fell today was Ecopetrol S.A ( EC), up 1.63. Top gainers within the industry include Enterprise Products Partners ( EPD), up 1.6%, Enbridge ( ENB), up 1.4%, Royal Dutch Shell ( RDS.A), up 1.0%, Total ( TOT), up 1.0% and Petroleo Brasileiro SA Petrobras ( PBR), up 0.9%. TheStreet Ratings group would like to highlight 3 stocks pushing the industry lower today: 3. PetroChina ( PTR) is one of the companies pushing the Energy industry lower today. As of noon trading, PetroChina is down $0.81 (-0.6%) to $127.45 on light volume Thus far, 30,851 shares of PetroChina exchanged hands as compared to its average daily volume of 100,300 shares. The stock has ranged in price between $126.42-$127.59 after having opened the day at $126.89 as compared to the previous trading day's close of $128.26. 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 $232.2 billion and is part of the basic materials sector. The company has a P/E ratio of 201.4, above the S&P 500 P/E ratio of 17.7. Shares are down 10.8% year to date as of the close of trading on Monday. 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 sub par growth in net income. Get the full PetroChina Ratings Report now. Exclusive Offer: Jim Cramer's 'go-to' small/mid-cap guru Bryan Ashenberg only buys stocks he thinks could return 50-100%. See his top picks for 14-days FREE.