基础化工行业周报：丁二烯、天然气等涨幅居前，建议继续关注钛白粉板块和轮胎板块

Investment Rating - The report maintains a "Buy" rating for several companies including China Petroleum, Sinopec, and others in the chemical sector [4][21]. Core Viewpoints - The report highlights significant price increases in certain chemical products such as butadiene (up 103.88%) and natural gas (up 12.21%), while other products like coal tar and DMF saw substantial declines [1][20]. - It suggests that the chemical industry is entering a favorable demand season, with opportunities for investment in leading companies within specific sub-sectors that exhibit strong cost advantages and stable competitive landscapes [3][21]. - The report emphasizes the importance of monitoring geopolitical factors and market expectations that could influence oil prices, which are currently under pressure but may stabilize [20][22]. Summary by Sections Chemical Industry Investment Suggestions - International oil prices are experiencing fluctuations, with recent geopolitical tensions affecting market stability [22]. - The report notes that the chemical sector is seeing a mix of price increases and decreases across various products, indicating a complex market environment [1][19]. Price Movements - Significant price increases were observed in butadiene, natural gas, and other chemicals, while products like coal tar and DMF faced notable declines [1][19]. - The report provides a detailed analysis of price trends for various chemicals, indicating a volatile market influenced by supply and demand dynamics [31][32]. Company Performance and Recommendations - The report identifies specific leading companies in various sub-sectors, such as Wanhua Chemical in polyurethane and Longbai Group in titanium dioxide, as having strong investment potential due to their competitive advantages [3][21]. - It suggests that companies like Sinopec and China National Offshore Oil Corporation are well-positioned to benefit from potential cost relief in refining operations [20][21].