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 64 points (0.4%) at 14,866 as of Thursday, April 11, 2013, 12:55 PM ET. The NYSE advances/declines ratio sits at 1,808 issues advancing vs. 1,100 declining with 140 unchanged. The Basic Materials sector currently sits down 0.24 versus the S&P 500, which is up 0.4%. On the negative front, top decliners within the sector include Valero Energy Corporation ( VLO), down 4.12, HollyFrontier ( HFC), down 4.14, Marathon Petroleum ( MPC), down 3.72, Petroleo Brasileiro SA Petrobras ( PBR.A), down 1.89 and PetroChina ( PTR), down 0.97. Top gainers within the sector include Occidental Petroleum Corporation ( OXY), up 3.7%, Southwestern Energy Company ( SWN), up 2.8%, PPG Industries ( PPG), up 2.3%, Total ( TOT), up 1.2% and Chevron ( CVX), up 0.9%. TheStreet Ratings group would like to highlight 5 stocks pushing the sector lower today: 5. Teck Resources ( TCK) is one of the companies pushing the Basic Materials sector lower today. As of noon trading, Teck Resources is down $0.53 (-1.8%) to $28.21 on average volume Thus far, 1.6 million shares of Teck Resources exchanged hands as compared to its average daily volume of 2.2 million shares. The stock has ranged in price between $28.10-$28.67 after having opened the day at $28.63 as compared to the previous trading day's close of $28.74. Teck Resources Limited engages in exploring for, acquiring, developing, and producing natural resources in the Americas, Asia Pacific, Europe, and Africa. Teck Resources has a market cap of $16.5 billion and is part of the metals & mining industry. The company has a P/E ratio of 20.8, above the S&P 500 P/E ratio of 17.7. Shares are down 20.9% year to date as of the close of trading on Wednesday. TheStreet Ratings rates Teck Resources as a hold. The company's strengths can be seen in multiple areas, such as its largely solid financial position with reasonable debt levels by most measures and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, feeble growth in the company's earnings per share and disappointing return on equity. Get the full Teck Resources 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.