Petroleo Brasileiro SA Petrobras ( PBR.A) pushed the Basic Materials sector lower today making it today's featured Basic Materials loser. The sector as a whole closed the day down 0.2%. By the end of trading, Petroleo Brasileiro SA Petrobras fell 36 cents (-1.9%) to $18.69 on average volume. Throughout the day, 10 million shares of Petroleo Brasileiro SA Petrobras exchanged hands as compared to its average daily volume of 8.1 million shares. The stock ranged in price between $18.41-$18.81 after having opened the day at $18.75 as compared to the previous trading day's close of $19.05. Other company's within the Basic Materials sector that declined today were: Extorre Gold Mines ( XG), down 12%, Gulf Resources ( GURE), down 11.8%, KiOR ( KIOR), down 10%, and Patriot Coal Corporation ( PCX), down 10%. Petroleo Brasileiro S.A. primarily engages in oil and natural gas exploration and production, refining, trade, and transportation businesses. Petroleo Brasileiro SA Petrobras has a market cap of $123.92 billion and is part of the energy industry. The company has a P/E ratio of 7.1, below the S&P 500 P/E ratio of 17.7. Shares are down 19.4% year to date as of the close of trading on Thursday. TheStreet Ratings rates Petroleo Brasileiro SA Petrobras as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, attractive valuation levels and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including deteriorating net income, disappointing return on equity and weak operating cash flow.