合成橡胶：震荡偏弱

1. Report Industry Investment Rating - The investment rating for the synthetic rubber industry is "Oscillating Weakly" [2] 2. Core Viewpoints of the Report - The synthetic rubber market is expected to remain weak due to supply pressure from domestic raw material production increases and lackluster demand. Tire companies face shipment pressure, with under - performing foreign trade orders. In November, some companies plan to reduce production or conduct maintenance, which will limit the overall capacity utilization rate. Key factors to track include the bottoming point and timing of butadiene prices, the price spread between natural and synthetic rubber, and the performance of natural rubber after the harvest season [2][28] 3. Summary by Directory Chapter 1: Market Review - The synthetic rubber market showed a weak trend. The 01 contract opened at 11,125 yuan/ton in October, reached a high of 11,285 yuan/ton, a low of 10,175 yuan/ton, and closed at 10,550 yuan/ton, with a monthly decline of 560 yuan or 5.04% [3] Chapter 2: Analysis of Price - Influencing Factors 2.1 Butadiene Capacity Expansion - From 2021 - 2025, China's butadiene capacity has been increasing year - by - year, with the growth rate first decreasing and then increasing. In 2025, domestic capacity expansion is concentrated, with the capacity growth rate reaching 14.16%, a five - year high. By the end of 2025, China's total butadiene capacity will reach 7.577 million tons/year [5][6] 2.2 High Butadiene Operating Rate and Import Growth - In October, butadiene production was 457,300 tons, a year - on - year increase of 14.49%. From January to October, production was 4.472 million tons, a year - on - year increase of 15.46%. The capacity utilization rate in October was 66.48%. In September 2025, butadiene imports were 56,000 tons, a year - on - year increase of 25.09%. From January to September, imports were 393,600 tons, a year - on - year increase of 54.8% [7][8][10] 2.3 High Growth in Butadiene Imports - The import volume of butadiene has been growing rapidly, as shown by the data from January - September and September 2025 [10] 2.4 Pressure on Butadiene Prices and Profits - The total inventory of domestic butadiene samples fluctuated slightly this period, with a 1.67% week - on - week decrease. The theoretical production profits of different butadiene production processes decreased. As of October 29, the weekly average profit of the C4 extraction process was 1,265 yuan/ton, a decrease of 578 yuan/ton from the previous period [13] 2.5 Sufficient Synthetic Rubber Capacity Expansion and High Production Growth - New synthetic rubber capacities have been put into production, such as Yulong Petrochemical's 150,000 tons/year nickel/neodymium - based cis - butadiene rubber capacity and Zhejiang Petrochemical's 100,000 - ton device. In September, synthetic rubber production was 774,000 tons, a year - on - year increase of 13.50%. From January to September, production was 6.616 million tons, a year - on - year increase of 11.20% [15][17] 2.6 High Growth in Imports of Natural and Synthetic Rubber (Including Latex) - In September 2025, China imported 742,000 tons of natural and synthetic rubber (including latex), a 20.8% increase compared to the same period in 2024. From January to September, imports were 6.115 million tons, a 19.2% increase year - on - year [19] 2.7 Tire Production Growth Slows - In September 2025, China's rubber tire outer - tube production was 103.487 million pieces, a year - on - year increase of 0.2%. From January to September, production was 899.386 million pieces, a 1.5% increase year - on - year, far lower than the 9.59% growth rate in 2024. The export market growth rate declined, and the replacement market performed poorly [22][25] 2.8 Tire Inventory Needs to be Reduced and Operating Rate Increase is Limited - The capacity utilization rate of China's semi - steel tire sample enterprises was 72.12%, a week - on - week decrease of 0.72 percentage points. The capacity utilization rate of full - steel tire sample enterprises was 65.34%, a week - on - week decrease of 0.53 percentage points. Tire finished - product inventory needs to be reduced [26] 2.9 Weak Supply - Demand Drivers and Synchronous Decline of Raw Materials and Cis - Butadiene Rubber - Due to weak supply - demand drivers, raw materials and cis - butadiene rubber prices declined synchronously, with butadiene having a larger and faster decline [27] Chapter 3: Market Outlook and Investment Strategy - The synthetic rubber market is expected to remain weak due to supply pressure on the raw material side and lack of demand - side support. Key factors to monitor include the bottoming point and timing of butadiene prices, the price spread between natural and synthetic rubber, and the performance of natural rubber after the harvest season [28]