短纤：短期跟随成本波动，趋势偏弱，瓶片：短期跟随成本波动，趋势偏弱瓶片

Report Summary 1) Report Industry Investment Rating No specific industry investment rating is provided in the report. 2) Core View Both short - fiber and bottle - chip markets are expected to follow cost fluctuations in the short term, with a weakening trend [1]. 3) Summary by Relevant Content Fundamental Tracking - Short - fiber: The prices of short - fiber contracts 2510, 2511, and 2512 increased by 16, 18, and 34 respectively compared to the previous day. The price differences PF10 - 11 and PF11 - 12 decreased by 2 and 16 respectively. The short - fiber basis decreased by 18. The short - fiber main contract's trading volume increased by 2925, and the open interest increased by 10978. The short - fiber spot price in East China remained unchanged at 6.470, and the sales - to - production ratio increased by 1% to 64% [1]. - Bottle - chip: The prices of bottle - chip contracts 2510, 2511, and 2512 increased by 14, 14, and 8 respectively compared to the previous day. The price difference PR10 - 11 remained unchanged, and PR11 - 12 increased by 6. The main contract's open interest decreased by 37, and the trading volume decreased by 3389. The bottle - chip spot price in East China increased by 20 to 5850, and the spot price in South China remained unchanged at 5890 [1]. Spot News - Short - fiber: The short - fiber futures followed the raw materials to rise and then fall. The factory's spot price remained stable, and the discounts for futures - cash and traders narrowed, with less trading volume. The mainstream negotiation range for semi - bright 1.4D was 6400 - 6700. As of 3:00 pm, the average sales - to - production ratio was 64% [1]. - Bottle - chip: The upstream polyester raw material futures rose and then fell. The polyester bottle - chip factory's quotes were mostly stable. The trading atmosphere in the polyester bottle - chip market was average. The orders from September to November were mostly traded at 5800 - 5920 yuan/ton ex - factory, with some slightly lower at around 5760 yuan/ton ex - factory and some slightly higher at 5940 - 5960 yuan/ton ex - factory [2]. Trend Intensity The trend intensity of short - fiber and bottle - chip on the reporting day's daytime main contract price fluctuations was 0, indicating a neutral trend. The trend intensity ranges from - 2 (most bearish) to 2 (most bullish) [3].