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According to Sinochem New Network, recently the China Synthetic Rubber Industry Association (hereinafter referred to as the Synthetic Rubber Association) and Longzhong Information jointly released the synthetic rubber industry prosperity index. The establishment and release of this index represent an important advancement in the monitoring system for the performance of the synthetic rubber industry, aiming to provide decision-making references for market participants. The synthetic rubber industry index is developed using a scientific model, based on key data from various dimensions such as the supply and demand dynamics in the synthetic rubber industry, price fluctuations in the market, corporate profitability levels, and anticipated changes within the industry. By systematically integrating information on key aspects such as production, inventory, distribution, sales, profits, and forecasts, this index reflects the supply-demand balance in China’s synthetic rubber market, providing companies along the industry chain with a quantitative basis for analyzing market trends. The synthetic rubber industry index shows that, taking into account the database of manufacturers of styrene-butadiene rubber, styrene-butadiene-styrene rubber (styrene-butadiene-styrene block copolymer), the index has been on a downward trend since July 2025 ； Driven by various trends indicating stable growth in industry profits, supply, and distribution, the synthetic rubber industry’s prosperity index showed signs of improvement in December 2025, with the index returning to an upward trend. “The current synthetic rubber industry is at a crucial stage of transition from traditional energy-based chemical manufacturing to the production of high-end new materials. The health, stability, and forward-looking nature of this industrial ecosystem are directly related to the availability of raw materials and the pace of innovation in strategic emerging industries such as new energy vehicles, rail transport, aerospace, and biomedicine. ”Li Jinshan, Secretary-General of the Synthetic Rubber Association, said that developing industry indices is an inevitable requirement for making decisions based on data and driving governance reforms through data. The release of these indices represents not only the introduction of a set of statistical metrics but also a new stage in the industry’s progress toward high-quality development. Guo Yating, an analyst at Longzhong Information, noted that although the synthetic rubber industry faced challenges such as measures to counter excessive competition and anti-dumping actions in 2025, its production capacity and output reached new high levels. Among them, the butadiene styrene rubber industry shows a promising profit trend; coupled with high supply levels, the prosperity index has rebounded and remains at a high level within the prosperous range.