Tesoro Corporation ( TSO) pushed the Basic Materials sector lower today making it today's featured Basic Materials loser. The sector as a whole closed the day up 1.1%. By the end of trading, Tesoro Corporation fell 32 cents (-1.4%) to $21.96 on average volume. Throughout the day, 5.1 million shares of Tesoro Corporation exchanged hands as compared to its average daily volume of 3.8 million shares. The stock ranged in price between $21.68-$22.48 after having opened the day at $22.26 as compared to the previous trading day's close of $22.28. Other company's within the Basic Materials sector that declined today were: Tri-Valley Corporation ( TIV), down 23.1%, China Natural Resources ( CHNR), down 15.8%, Lake Shore Gold ( LSG), down 10.5%, and China Precision Steel ( CPSL), down 6.9%. Tesoro Corporation, together with its subsidiaries, engages in refining and marketing petroleum products in the United States. It operates in two segments, Refining and Retail. Tesoro Corporation has a market cap of $3.22 billion and is part of the energy industry. The company has a P/E ratio of 6.6, equal to the average energy industry P/E ratio and below the S&P 500 P/E ratio of 17.7. Shares are down 4.2% year to date as of the close of trading on Wednesday. Currently there are six analysts that rate Tesoro Corporation a buy, no analysts rate it a sell, and five rate it a hold. TheStreet Ratings rates Tesoro Corporation as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, attractive valuation levels, solid stock price performance and notable return on equity. We feel these strengths outweigh the fact that the company has had sub par growth in net income.