Report Summary 1. Report Industry Investment Rating No investment rating information is provided in the report. 2. Core View The report anticipates that PX, PTA, and PR will operate in a fluctuating manner. The fundamentals of PX are weak, with supply increasing and demand not meeting expectations. PTA's fundamentals remain unchanged, with cost support and some plant maintenance plans, but downstream demand is weak. PR's downstream demand is average, with sufficient market supply and cautious market sentiment [2]. 3. Summary by Related Catalogs Price Information - **Upstream**: On September 17, 2025, WTI crude oil futures settled at $64.05 per barrel, down 0.73%; Brent crude oil futures settled at $67.95 per barrel, down 0.76%. The spot price of naphtha CFR Japan was $608.88 per ton, up 0.66%. The spot price of xylene (isomeric grade) FOB South Korea was $680.50 per ton, down 0.58%. The spot price of paraxylene PX CFR China Main Port was $836 per ton, up 0.20% [1]. - **PTA**: On September 17, 2025, the CZCE TA main - contract closed at 4,712 yuan per ton, up 0.51%; the settlement price was 4,698 yuan per ton, up 0.13%. The spot price of PTA in the domestic market was 4,628 yuan per ton, up 0.22% [1]. - **PX**: On September 17, 2025, the CZCE PX main - contract closed at 6,772 yuan per ton, up 0.15%; the settlement price was 6,782 yuan per ton, down 0.09%. The spot price of paraxylene in the domestic market was 6,656 yuan per ton, unchanged [1]. - **PR**: On September 17, 2025, the CZCE PR main - contract closed at 5,868 yuan per ton, up 0.38%; the settlement price was 5,856 yuan per ton, down 0.07%. The market price of polyester bottle - chips in the East China market was 5,850 yuan per ton, unchanged [1]. Operating Conditions - The operating rates of the polyester industry chain, including PX, PTA factories, polyester factories, bottle - chip factories, and Jiangsu and Zhejiang looms, remained unchanged on September 17, 2025 [1]. - The sales rate of polyester filament was 42.42%, up 1.47 percentage points; the sales rate of polyester staple fiber was 52.32%, down 12.75 percentage points; the sales rate of polyester chips was 102.68%, down 18.06 percentage points [1]. Device Information - Ningbo Taihua's 1.2 million - ton PTA device stopped on September 5 [2]. PX Summary - **Important Information**: Geopolitical factors and the Fed's strong expectation of interest - rate cuts support oil prices. The overnight rise of raw materials expanded, and the morning PX negotiation level strengthened, but the trading atmosphere declined in the late session. The domestic PX operating load is high, but many PTA devices have announced maintenance plans, increasing the game between cost and supply - demand [2]. - **Long - Short Logic**: The fundamentals are weak. The PX2511 contract closed at 6,772 yuan per ton, down 0.24%. The supply has increased due to the delay of Fujia Dahua's maintenance and the restart of some devices. Although it is the peak season for downstream polyester, new orders and loads are not as expected. Naphtha prices are strong, and PXN is expected to run weakly [2]. PTA Summary - **Long - Short Logic**: The fundamentals have no obvious changes. The TA2601 contract closed at 4,712 yuan per ton, up 0.43%. Cost support and some PTA factory maintenance plans are beneficial, but downstream polyester filament sales are only 42%. A 4.5 million - ton PTA device in South China will restart, increasing short - term supply. New maintenance plans from October to November have limited impact on the current market. The overall industry chain shows that the start - up of polyester raw materials has increased significantly, while the start - up of polyester and downstream has recovered slowly. The demand side has not actively destocked, and the market's expectation for peak - season demand has weakened [2]. PR Summary - **Important Information**: The mainstream negotiation price of polyester bottle - chips in the Jiangsu and Zhejiang markets is between 5,830 - 5,900 yuan per ton, up 10 yuan per ton from the previous trading day. Polyester raw materials PTA and bottle - chip futures fluctuate, the supply - side quotation of bottle - chips is stable, and downstream terminals follow up cautiously [2]. - **Long - Short Logic**: The downstream demand is average. The PR2511 contract closed at 5,868 yuan per ton, up 0.14%. The supply - side start - up of bottle - chips is stable, the market supply is sufficient, and the market sentiment is cautious [2].