短纤：高位震荡，瓶片：高位震荡瓶片

Report Summary Industry Investment Rating - The investment ratings for short - fiber and bottle - chip are both "High - level Volatility" [1] Core Viewpoints - The short - fiber and bottle - chip markets are expected to experience high - level volatility. The short - fiber market has a cost - driven price adjustment, while the bottle - chip market shows relatively stable prices with a weak trading atmosphere [1][2] Summary by Relevant Catalogs 1. Fundamental Tracking - Short - fiber: - Futures prices: Short - fiber 2509 was 6492 (up 6 from the previous day), short - fiber 2510 was 6622 (up 26), and short - fiber 2511 was 6600. - Spread: PF09 - 10 was - 130 (down 20), PF10 - 11 was 22 (up 22), and the PF basis was - 37 (down 26). - Position and volume: The short - fiber main contract's open interest was 160220 (down 65356), and the trading volume was 155772 (up 4802). - Spot price and sales rate: The short - fiber spot price in East China was 6585 (unchanged), and the sales - to - production ratio was 40% (down 5%) [1] - Bottle - chip: - Futures prices: Bottle - chip 2509 was 5856 (down 42), bottle - chip 2510 was 6028 (down 12), and bottle - chip 2511 was 6034 (down 16). - Spread: PR09 - 10 was - 172 (down 30), PR10 - 11 was - 6 (up 4), and the PR main contract's basis was - 78 (down 18). - Position and volume: The bottle - chip main contract's open interest was 33925 (up 996), and the trading volume was 76184 (down 23091). - Spot price: The bottle - chip spot price in East China was 5950 (down 30), and in South China it was 6020 (unchanged) [1] 2. Spot News - Short - fiber: In the morning, the raw material prices rose, so most short - fiber factories in Jiangsu and Zhejiang raised their quotes by 50 yuan, while those in Fujian remained stable. The mainstream transaction price was 6550 - 6800 yuan/ton in Jiangsu and Zhejiang and 6550 - 6650 yuan/ton in Fujian. The market transactions were mainly for rigid demand, and the average sales - to - production ratio was 40% by 3:00 pm. Some factories planned to cut 20% of their September contracts [1] - Bottle - chip: The upstream polyester raw material futures first rose and then fell. Polyester bottle - chip factory quotes were mostly stable, with some increasing by 20 - 50 yuan. The market trading atmosphere was light, and the 8 - 10 month orders were mainly traded at 5880 - 6000 yuan/ton ex - factory [2] 3. Trend Intensity - The trend intensity of short - fiber and bottle - chip on the reporting day's daytime session of the main contract futures price fluctuations was 0, indicating a neutral trend [3]