基础化工行业：金属铬再提价，油价底部反弹

Group 1 - Industry investment rating: Buy [2] - Core viewpoint: Metal chromium price increase and oil price rebound from the bottom [1][12] - The SW basic chemical sector rose by 0.31% from April 14 to April 18, underperforming the Wind All A Index by 0.08 percentage points [12][22] Group 2 - Key sub-industry information tracking: MDI market is experiencing weak demand and low trading activity [13] - TDI prices have significantly dropped due to weak order follow-up [16] - Polyester filament prices have decreased, reflecting weak demand in the market [17] Group 3 - Price trends: Among 336 tracked chemical products, 16% increased, 42% remained stable, and 42% decreased [37] - Notable price increases were observed in trichloroethylene, IPDI, and international propane [37] - Significant price declines were noted in liquid chlorine, butadiene, and TDI [37] Group 4 - Recommendations for attention: Focus on cyclical supply reconstruction in refrigerants and chromium chemicals, domestic demand recovery in civil explosives and modified plastics, and export chains in pesticides [12] - Growth areas include electronic materials, synthetic biology, and solid-state battery materials [12] - Long-term themes include companies trading below net asset value and mergers and acquisitions [12]