The basic materials sector closed the day up 2.7%. Lizhan Environmental ( LZEN), Energy Services of America Corporation ( ESA), Andatee China Marine Fuel Services Corporat ( AMCF), and Clean Diesel Technologies Inc ( CDTI) were all decliners today within the basic materials sector with YPF Sociedad Anonima ( YPF) being today's featured basic materials loser. YPF Sociedad Anonima fell 75 cents (-2%) to $37.12 on light volume. Throughout the day, 327,284 shares of YPF Sociedad Anonima exchanged hands as compared to its average daily volume of 440,100 shares. YPF SOCIEDAD ANONIMA, an energy company, engages in the exploration, development, and production of crude oil, natural gas, and liquefied petroleum gas (LPG) in Argentina. YPF Sociedad Anonima has a market cap of $15.1 billion and is part of the energy industry. The company has a P/E ratio of 10.4, below the average energy industry P/E ratio of 21.6 and below the S&P 500 P/E ratio of 17.7. Shares are down 23.6% year to date as of the close of trading on Monday. TheStreet Ratings rates YPF Sociedad Anonima as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, reasonable valuation levels and notable return on equity. However, as a counter to these strengths, we also find weaknesses including deteriorating net income, poor profit margins and weak operating cash flow.