Report Summary 1. Report Industry Investment Rating - No investment rating information is provided in the report. 2. Core View - The polyolefin futures closed positive yesterday. The spot prices of linear LL and拉丝 PP from Sinopec and PetroChina remained stable. The market heat has cooled down, and the polyolefin spot market is still mainly driven by supply and demand. Summer maintenance is in balance, and inventory is slowly being digested, but short - term petrochemical inventory may fluctuate. The domestic macro - level is still driven by domestic demand, and the terminal stocking demand may gradually pick up in mid - to late August. The future market should focus on the autumn stocking rhythm after supply - demand digestion and possible changes on the supply side [2]. 3. Summary by Relevant Catalogs Futures Market - **Prices**: For linear LL futures, the previous day's closing prices for January, May, and September contracts were 7347, 7340, and 7308 respectively, with increases of 40, 49, and 40 and涨幅 of 0.55%, 0.67%, and 0.55% respectively. For拉丝 PP futures, the previous day's closing prices for January, May, and September contracts were 7056, 7062, and 7026 respectively, with increases of 40, 30, and 39 and涨幅 of 0.57%, 0.43%, and 0.56% respectively [2]. - **Volume and Open Interest**: The trading volumes of linear LL futures for January, May, and September contracts were 400529, 7534, and 95001 respectively, and the open interests were 381563, 20465, and 90092 respectively. The open interest changes were 21423, 1614, and - 35644 respectively. For拉丝 PP futures, the trading volumes were 341106, 14955, and 58830 respectively, the open interests were 442583, 31841, and 61893 respectively, and the open interest changes were 25989, 2844, and - 19500 respectively [2]. - **Spreads**: For linear LL, the current spreads of January - May, May - September, and September - January were 7, 32, and - 39 respectively, compared with previous values of 16, 23, and - 39. For拉丝 PP, the current spreads of January - May, May - September, and September - January were - 6, 36, and - 30 respectively, compared with previous values of - 16, 45, and - 29 [2]. Raw Materials and Spot Market - **Raw Materials**: The current prices of methanol futures, Shandong propylene, South China propane, PP recycled materials, North China powder, and mulch film were 2427 yuan/ton, 6390 yuan/ton, 570 dollars/ton, 5600 yuan/ton, 6770 yuan/ton, and 8800 yuan/ton respectively, with some changes compared to previous values [2]. - **Spot Market**: In the middle - stream market, the current price ranges of linear LL in East China, North China, and South China were 7250 - 7700 yuan/ton, 7150 - 7450 yuan/ton, and 7350 - 7750 yuan/ton respectively. For拉丝 PP, the current price ranges in East China, North China, and South China were 6900 - 7000 yuan/ton, 6850 - 7000 yuan/ton, and 6850 - 7100 yuan/ton respectively [2]. News - On Wednesday (August 20), the settlement price of WTI crude oil futures for September 2025 on the New York Mercantile Exchange was $63.21 per barrel, up $0.86 or 1.38% from the previous trading day, with a trading range of $62.39 - $63.55. The settlement price of Brent crude oil futures for October 2025 on the London Intercontinental Exchange was $66.84 per barrel, up $1.05 or 1.60% from the previous trading day, with a trading range of $65.81 - $67.06 [2].