化工ETF(159870)红盘向上，PX盈利情况率先好转，PTA反内卷可期，聚酯产业链景气度持续上行

Group 1: Polyester Industry Chain Price Trends - The prices of polyester industry chain products have increased as of December 25, with PX at 7318, PTA at 5040, polyester filament at 6450, polyester bottle chips at 5990, and BOPET at 7475 yuan/ton, reflecting increases of +7.88%, +8.39%, +2.79%, +5.27%, and +1.15% respectively compared to the previous week [1] Group 2: Production Capacity Insights - PX production is currently at 89% capacity, with no new capacity expected before Q4 2024. PTA has a 74% operating rate with significant pressure from 2025, and no new capacity is anticipated for 2026. Polyester filament is stable with a 90% operating rate and an annual expansion of 3-4% [1] Group 3: Demand and Consumption Forecast - From January to November this year, the apparent demand for polyester filament has only increased by 3.5%. Following a proactive inventory accumulation cycle in 2024, a destocking cycle is expected to begin in early 2025. By 2026, a return to an inventory accumulation cycle is anticipated, with consumption growth expected to return to the 5-10% range [1] Group 4: Profitability Analysis - Recent profitability trends show PX recovering from zero to 700 yuan/ton, PTA moving from cash flow losses to break-even, and polyester entering a state of slight losses. By 2026, PX profits are expected to expand further, while PTA is likely to maintain break-even, and polyester is projected to recover to a profit range of 100-200 yuan [1] Group 5: Lithium Battery Materials Sector - The lithium battery materials sector has seen a decline due to rumors of a 15% production cut by CATL in Q1 and speculation about 6F prices dropping below 110,000 yuan. However, ongoing negotiations indicate that pricing discussions are progressing as planned, and CATL's suppliers have stated that a 15% reduction is not feasible without losing market share [2] Group 6: Chemical ETF Performance - As of December 30, 2025, the CSI Sub-Industry Chemical Theme Index (000813) rose by 0.37%, with notable increases in constituent stocks such as Hengyi Petrochemical (000703) up by 5.21% and Hengli Petrochemical (600346) up by 2.95% [2]