「2025.10.10」 瑞达期货研究院 研究员：林静宜 期货从业资格号F03139610 期货投资咨询证书号Z0021558 合成橡胶市场周报 添加客服 目录 1、周度要点小结 2、期现市场 3、产业情况 4、期权市场分析 「周度要点小结」 关 注 我 们 获 取 更 多 资 讯 业务咨询 3 4 「期货市场情况」 行情回顾：国内丁二烯市场小幅下行，节后下游心态观望，部分供方价格下调亦难以刺激成交跟 进，虽下游合成橡胶市场气氛有所支撑，但在成交不佳拖拽下，丁二烯现货行情小幅走低。民营 生产企业延续低价出货，但部分供方存在限量出货情况，中间商入市积极性有所提升，下游询盘 增多。 行情展望：前期多数检修顺丁橡胶装置陆续重启，国内产量恢复性提升，齐鲁、扬子、浙石化顺 丁橡胶装置均有检修预期，但也有装置重启，另外茂名石化、裕龙石化顺丁橡胶装置提负运行， 整体产量预期环比有所增长。原料方面，10月虽有镇海炼化与广州石化丁二烯装置存检修计划， 但随着前期降负的华中及华南装置陆续恢复，叠加进口到港，丁二烯供应仍显充裕。需求方面， 假期期间国内部分轮胎企业存5-8天检修计划，拖拽企业产能利用率明显下滑，随着检修企业开工 逐 ...

在11000-11600区间波动。 免责声明 本报告中的信息均来源于公开可获得资料，瑞达期货股份有限公司力求准确可靠，但对这些信息的准确性及完整性不做任 何保证，据此投资，责任自负。本报告不构成个人投资建议，客户应考虑本报告中的任何意见或建议是否符合其特定状况。本 报告版权仅为我公司所有，未经书面许可，任何机构和个人不得以任何形式翻版、复制和发布。如引用、刊发，需注明出处为 瑞达期货股份有限公司研究院，且不得对本报告进行有悖原意的引用、删节和修改。 合成橡胶产业日报 2025-10-09 | 项目类别 | 数据指标 | 最新 | 环比 数据指标 | 最新 | 环比 | | --- | --- | --- | --- | --- | --- | | 期货市场 | 主力合约收盘价:合成橡胶(日,元/吨) | 11325 | 225 主力合约持仓量:合成橡胶(日,元/吨) | 31413 | -1801 | | | 合成橡胶10-11价差(日,元/吨) | 35 | -215 仓单数量:丁二烯橡胶:仓库:总计(日,吨) | 2770 | 0 | | 现货市场 | 主流价:顺丁橡胶(BR9000,齐鲁石化):山 | ...

相关报告：智研咨询发布的《2025-2031年中国合成橡胶行业市场供需态势及发展前景研判报告》 上市企业：博实股份（002698）,亚星化学（600319）,阳谷华泰（300121）,双箭股份（002381）,齐翔腾 达（002408）,海达股份（300320）,软控股份（002073）,中化国际（600500）,三力士（002224）,彤程 新材（603650） 数据来源：国家统计局，智研咨询整理 知前沿，问智研。智研咨询是中国一流产业咨询机构，十数年持续深耕产业研究领域，提供深度产业研 究报告、商业计划书、可行性研究报告及定制服务等一站式产业咨询服务。专业的角度、品质化的服 务、敏锐的市场洞察力，专注于提供完善的产业解决方案，为您的投资决策赋能。 根据国家统计局数据显示：2025年8月中国合成橡胶产量为74万吨，同比增长7.4%；2025年1-8月中国合 成橡胶累计产量为584.8万吨，累计增长10.9%。 2020-2025年1-8月中国合成橡胶产量统计图 ...

期间关注成本端原油以及丁二烯价格波动情况。 | 项目类别 | 数据指标 | 最新 | 环比 数据指标 | 最新 | 环比 | | --- | --- | --- | --- | --- | --- | | 期货市场 | 主力合约收盘价:合成橡胶(日,元/吨) | 11100 | -240 主力合约持仓量:合成橡胶(日,元/吨) | 33214 | -5336 | | | 合成橡胶10-11价差(日,元/吨) | 250 | 215 仓单数量:丁二烯橡胶:仓库:总计(日,吨) | 2770 | 100 | | | 主流价:顺丁橡胶(BR9000,齐鲁石化):山 | 11450 | -100 主流价:顺丁橡胶(BR9000,大庆石化):山 | 11400 | -50 | | 现货市场 | 东(日,元/吨) 主流价:顺丁橡胶(BR9000,大庆石化):上 | 11500 | 东(日,元/吨) -50 主流价:顺丁橡胶(BR9000,茂名石化):广 | 11550 | -50 | | | 海(日,元/吨) 基差:合成橡胶(日,元/吨) 布伦特原油(日,美元/桶) | 110 67.97 | -10 东(日,元/吨) ...

合成橡胶产业日报 2025-09-29 | 项目类别 | 数据指标 | 最新 | 环比 数据指标 | 最新 | 环比 | | --- | --- | --- | --- | --- | --- | | 期货市场 | 主力合约收盘价:合成橡胶(日,元/吨) | 11340 | -90 主力合约持仓量:合成橡胶(日,元/吨) | 38550 | -1541 | | | 合成橡胶10-11价差(日,元/吨) | 35 | 0 仓单数量:丁二烯橡胶:仓库:总计(日,吨) | 2670 | 0 | | 现货市场 | 主流价:顺丁橡胶(BR9000,齐鲁石化):山 东(日,元/吨) 主流价:顺丁橡胶(BR9000,大庆石化):上 | 11550 | 主流价:顺丁橡胶(BR9000,大庆石化):山 0 东(日,元/吨) | 11450 | -50 | | | | 11550 | -50 主流价:顺丁橡胶(BR9000,茂名石化):广 | 11600 | 0 | | | 海(日,元/吨) 基差:合成橡胶(日,元/吨) | 110 | 东(日,元/吨) -10 | | | | 上游情况 | | | | | | | | 布伦特原 ...

1. Report Industry Investment Rating - The investment view of the synthetic rubber industry is "oscillating bearish" [2] 2. Core View of the Report - The domestic butadiene market has weakened slightly. Butadiene rubber is affected by macro - sentiment, and the market's attempt to support prices has been hindered. Under the pressure of high inventory and high production, the synthetic rubber market is viewed with a bearish attitude in the short - term. In terms of valuation, the correlation between the BR futures and NR has increased, showing stronger rubber - related attributes [2] 3. Summary According to Relevant Catalogs 3.1 Market Review - During the reporting period, the prices of high - cis butadiene rubber of Sinopec Chemical Marketing and major sales companies of PetroChina remained stable. As of September 25, 2025, the mainstream ex - factory price of high - cis butadiene rubber in China was between 11,700 - 11,800 yuan/ton. The temporary shutdown of Shandong Yihua's butadiene rubber plant due to a malfunction did not boost the supply in the short - term as the overall supply of private spot resources was sufficient, and there was an expectation of concentrated restart of maintenance plants at the end of September. The increase in external supply of butadiene led to a decline in the transaction center, and the cost side also lacked driving force. Although the mainstream supply price of butadiene rubber was lowered at the end of the previous period, the price centers of arbitrage resources and private resources in the first and middle of the week were still significantly lower than the spot cost of the two - oil resources. Some industry players were still waiting for a further decline in the mainstream supply price. In the middle and late weeks, the supply of low - priced arbitrage resources decreased, and the price gap between high - end and low - end spot narrowed slightly. As the pre - holiday stocking was coming to an end, downstream buyers continued to purchase on dips [3] 3.2 Supply and Demand Analysis 3.2.1 Supply - **Butadiene**: Last week, the domestic butadiene production was 103,000 tons (-1.91%), and the capacity utilization rate was 66.3%. Devices such as Nanjing Chengzhi, Sierbang, Yanshan Petrochemical, Dongming Petrochemical, Jilin Petrochemical Phase I, Fushun Petrochemical, and Fujian Refining & Petrochemical's No.1 unit remained shut down, and production continued to decline [2] - **Butadiene Rubber**: The butadiene rubber plants of Shandong Weite, Taiyo - Yuubu, and Haopu New Materials continued maintenance. Shandong Yihua's plant was shut down temporarily due to a malfunction. The production and capacity utilization rate of high - cis butadiene rubber decreased [2] 3.2.2 Demand - **Semi - steel Tires**: During the period, the market trading was dull. In some regions, the sales of all - season tires were weak, the social inventory was sufficient and the consumption was slow, so agents were not active in purchasing. For the snow - tire market, product promotion meetings of various brands were held one after another, and the channel inventory was relatively sufficient. Future attention should be paid to the terminal demand [2] - **All - steel Tires**: During the period, the market trading was average, mainly for regular sales, and the transaction price was stable. There was no obvious pre - holiday stocking, and the inventory was mainly consumed during the period. It is expected that the market stocking volume will increase significantly in the next period [2] 3.3 Inventory Analysis - **Butadiene**: Last week, the butadiene port inventory was 277,500 tons, a week - on - week increase of 20.13%. Some devices continued to operate at reduced capacity, the refinery inventory decreased, and the suppliers sold more goods before the holiday, so the inventory remained at a relatively low level. The port inventory increased significantly due to the arrival of ocean - going vessels during the week, but there was no obvious short - term inventory pressure [2] - **Butadiene Rubber**: The inventory of high - cis butadiene rubber enterprises + traders was 32,300 tons, a week - on - week decrease of 4.21%. The inventory of sample production enterprises increased slightly, while the inventory of sample trading enterprises decreased [2] 3.4 Price and Spread Analysis - **Price**: The prices of high - cis butadiene rubber of major enterprises remained stable during the period, but most prices showed a week - on - week downward trend. For example, the ex - factory price of Sinopec's North China Qilu, North China Yanshan, East China Yangzi, and South China Maoming decreased by 200 yuan/ton week - on - week [7][8] - **Spread/Price Ratio**: The RU - BR spread was 4,040 yuan/ton (-1.22%); the NR - BR spread was 1,005 yuan/ton (+17.54%); the BR - SC price ratio was - 0.12% [2] 3.5 Profit Analysis - The production profit of butadiene through oxidative dehydrogenation of butene was 186 yuan/ton, and the production profit through C4 extraction was 1,861.1 yuan/ton. The production profit of butadiene rubber was - 225 yuan/ton, and the gross profit rate was - 1.89% [2] 3.6 Geopolitical and Macroeconomic Factors - On September 25 local time, US President Trump announced on his social media platform that a 25% tariff would be imposed on all imported heavy - duty trucks starting from October 1. The crude oil market is in a range - bound game due to geopolitical factors, sanctions, and the expected oversupply in the fundamentals caused by OPEC+ production increases. The US non - farm payroll data for August was lower than market expectations, and the Federal Reserve cut interest rates by 25bp as expected, with two more interest rate cuts expected within the year, with a total cut of 50bp or more. Geopolitical situations in Russia - Ukraine, US - Venezuela, and the Middle East are frequently disturbed in the short - term and show a tense trend [2] 3.7 Trading Strategy - **Single - side Trading**: Oscillating upward - **Arbitrage**: Pay attention to the strategy of going long on BR and short on NR/RU. Key risks to monitor include downstream demand, cost changes, device maintenance, and geopolitical factors [2]

综述：弱势运行 01 国泰君安期货·能源化工 合成橡胶周度报告 资料来源：隆众资讯，国泰君安期货研究 国泰君安期货研究所 杨鈜汉 投资咨询从业资格号：Z0021541 日期：2025年09月28日 | | 本周合成橡胶观点：弱势运行 | | | --- | --- | --- | | 供应 | • | 本周期山东威特、台橡宇部及浩普新材料顺丁橡胶装置延续停车检修，山东益华顺丁橡胶装置因故障短停检修，周内高顺顺丁产量及产能利用率延续走 低。本周期高顺顺丁橡胶产量在2.67万吨，较上周减少0.13万吨，环比减少4.75%，产能利用率66.41%，环比下降3.31个百分点。预计下周期浩普新材料 | | | | 及台橡宇部顺丁橡胶装置存重启预期。 （隆众资讯） | | 需求 | • | 刚需方面，预计下周期轮胎样本企业产能利用率将明显走低，据了解，"国庆节"假期期间，部分企业计划9月30日或10月1日开始放假5-8天，将对下周 期样本企业产能利用率形成较大拖拽。（隆众资讯） | | | • | 替代需求方面，目前NR-BR主力合约价差维持在800-1000元/吨区间，替代需求仍维持在高位。因此顺丁橡胶整体需求端维持同 ...

Report Overview - Report Title: Synthetic Rubber Morning Report [2][11][20] - Report Date: September 26, 2025 [2][11][20] - Research Team: Energy and Chemicals Team of the Research Center [2][11][20] 1. Report Industry Investment Rating - Not provided in the report. 2. Report's Core View - Not explicitly stated in the report. The report mainly presents data on the synthetic rubber market, including prices, trading volumes, and profit margins. 3. Summary by Relevant Catalogs 3.1 BR (Butadiene Rubber) 3.1.1 Futures Market - The closing price of the main contract on September 25 was 11,545, a daily increase of 25 and a weekly increase of 130 [3][12][21]. - The trading volume of the main contract on September 25 was 83,682, a daily decrease of 29,720 and a weekly decrease of 32,429 [3][12][21]. - The open interest of the main contract on September 25 was 51,154, a daily decrease of 7,496 and a weekly decrease of 23,349 [3][12][21]. - The warehouse receipt quantity on September 25 was 9,250, a daily increase of 100 and a weekly decrease of 1,740 [3][12][21]. - The virtual - to - physical ratio on September 25 was 27.65, a daily decrease of 4 and a weekly decrease of 6 [3][12][21]. 3.1.2 Basis and Spread - The butadiene basis on September 25 was 35, a daily decrease of 25 and a weekly decrease of 100 [3][12][21]. - The 8 - 9 month spread on September 25 was - 5, a daily decrease of 15 and a weekly decrease of 170 [3][12][21]. - The 9 - 10 month spread on September 25 was 190, a daily decrease of 40 and a weekly increase of 45 [3][12][21]. 3.1.3 Spot Market - The Shandong market price on September 25 was 11,580, with no daily change and a weekly increase of 30 [3][12][21]. - The Chuanhua market price on September 25 was 11,500, with no daily change and a weekly increase of 50 [3][12][21]. - The Qilu ex - factory price on September 25 was 11,700, with no daily or weekly change [3][12][21]. 3.1.4 Processing and Import - Export - The spot processing profit on September 25 was - 121, a daily increase of 87 and a weekly increase of 142 [3][12][21]. - The futures processing profit on September 25 was - 156, a daily increase of 112 and a weekly increase of 242 [3][12][21]. - The import profit on September 25 was - 83,107, a daily decrease of 151 and a weekly decrease of 128 [3][12][21]. - The export profit on September 25 was - 38, a daily increase of 16 and a weekly decrease of 187 [3][12][21]. 3.2 BD (Butadiene) 3.2.1 Price - The Shandong market price on September 25 was 9,315, a daily decrease of 85 and a weekly decrease of 110 [3][12][21]. - The Jiangsu market price on September 25 was 9,175, with no daily change [3][12][21]. - The Yangzi ex - factory price on September 25 was 9,150, with no daily change and a weekly decrease of 100 [3][12][21]. - The CFR China price on September 25 was 1,060, with no daily change and a weekly decrease of 30 [3][12][21]. 3.2.2 Processing and Import - Export - The carbon four extraction profit data on September 25 was not available [3][12][21]. - The butene oxidative dehydrogenation profit on September 25 was 361, with no daily change and a weekly increase of 305 [3][12][21]. - The import profit on September 25 was 492, a daily decrease of 14 and a weekly increase of 252 [3][12][21]. - The export profit on September 25 was - 1,080, a daily decrease of 60 and a weekly decrease of 259 [3][12][21]. 3.3 Downstream Profit - The butadiene production profit on September 25 was - 156, a daily increase of 112 and a weekly increase of 242 [3][12][21]. - The styrene - butadiene production profit on September 25 was 1,063, with no daily change and a weekly increase of 125 [3][12][21]. - The ABS production profit on September 25 was 106, a daily decrease of 19 and a weekly increase of 109 [3][12][21]. - The SBS (791 - H) production profit on September 25 was 985, with no daily change and a weekly increase of 130 [3][12][21]. 3.4 Price Spreads 3.4.1 Inter - Variety Spreads - The RU - BR spread on September 25 was - 35,584, a daily increase of 7,446 and a weekly increase of 23,349 [3][12][21]. - The NR - BR spread on September 25 was - 38,724, a daily increase of 7,461 and a weekly increase of 23,479 [3][12][21]. - The Thai mixed - butadiene spread data on September 25 was not available [3][12][21]. - The 3L - styrene - butadiene spread on September 25 was 3,100, a daily decrease of 50 and a weekly increase of 50 [3][12][21]. 3.4.2 Intra - Variety Spreads - The butadiene standard - non - standard price spread on September 25 was 180, a daily increase of 20 and a weekly increase of 30 [3][12][21]. - The styrene - butadiene 1502 - 1712 spread on September 25 was 1,000, with no daily or weekly change [3][12][21].

Group 1: Report Information - Report Title: Synthetic Rubber Morning Report [2] - Research Team: Energy and Chemicals Team of the Research Center [2] - Report Date: September 26, 2025 [2] Group 2: BR (Butadiene Rubber) Market Data Futures Market - On September 25, the closing price of the main contract was 11,545, with a daily increase of 25 and a weekly increase of 130 [3] - The open interest of the main contract was 51,154, a daily decrease of 7,496 and a weekly decrease of 23,349 [3] - The trading volume of the main contract was 83,682, a daily decrease of 29,720 and a weekly decrease of 32,429 [3] - The warrant quantity was 9,250, a daily increase of 100 and a weekly decrease of 1,740 [3] - The virtual - to - real ratio was 27.65, a daily decrease of 4 and a weekly decrease of 6 [3] Basis and Spread - The basis of cis - butadiene was 155, a daily decrease of 25 and a weekly decrease of 130 [3] - The 8 - 9 spread was - 5, a daily decrease of 15 and a weekly decrease of 170; the 9 - 10 spread was 190, a daily decrease of 40 and a weekly increase of 45 [3] Spot Market - The Shandong market price was 11,580, unchanged daily and up 30 weekly; the Transfar market price was 11,500, unchanged daily and up 50 weekly [3] - The Qilu ex - factory price was 11,700, unchanged both daily and weekly [3] - CFR Northeast Asia was 1,500, unchanged daily and down 25 weekly; CFR Southeast Asia was 1,700, unchanged both daily and weekly [3] Processing and Import - Export - The spot processing profit was - 121, a daily increase of 87 and a weekly increase of 142; the futures processing profit was - 156, a daily increase of 112 and a weekly increase of 242 [3] - The import profit was - 83,107, a daily decrease of 151 and a weekly decrease of 128; the export profit was - 38, a daily increase of 16 and a weekly decrease of 187 [3] Group 3: BD (Butadiene) Market Data Price - The Shandong market price was 9,315, a daily decrease of 82 and a weekly decrease of 110; the Jiangsu market price was 9,175, unchanged daily and up 25 weekly [3] - The Yangzi ex - factory price was 9,150, unchanged both daily and weekly; CFR China was 1,060, unchanged daily and down 30 weekly [3] Processing and Import - Export - The carbon - four extraction profit was not available; the butylene oxidative dehydrogenation profit was 361, unchanged daily and up 305 weekly [3] - The import profit was 492, a daily decrease of 14 and a weekly increase of 252; the export profit was - 1,080, a daily decrease of 60 and a weekly decrease of 259 [3] Group 4: Downstream Profit Data - The cis - butadiene production profit was - 156, a daily increase of 112 and a weekly increase of 242; the styrene - butadiene production profit was 1,063, unchanged daily and up 125 weekly [3] - The ABS production profit was 106, a daily decrease of 19 and a weekly increase of 109; the SBS (791 - H) production profit was 985, unchanged daily and up 130 weekly [3] Group 5: Inter - variety Spread Data - RU - BR was - 35,584, a daily increase of 7,446 and a weekly increase of 23,349; NR - BR was - 38,724, a daily increase of 7,461 and a weekly increase of 23,479 [3] - The Thai mixed - cis - butadiene spread was not available; the 3L - styrene - butadiene spread was 3,100, a daily decrease of 50 and a weekly increase of 50 [3] - The cis - butadiene standard - non - standard spread was 180, a daily increase of 20 and a weekly increase of 30; the styrene - butadiene 1502 - 1712 spread was 1,000, unchanged both daily and weekly [3]

Report Summary 1. Report Industry Investment Rating No information provided. 2. Core Viewpoints - The overall supply of domestic cis - butadiene rubber is sufficient, with increased production and more external resources of raw material butadiene. There is a lack of positive factors in cost and supply, and some industry players are waiting to see if the ex - factory prices of Sinopec and PetroChina resources will be lowered. [2] - Near the National Day holiday, downstream terminals may start to pick up goods, and the overall inventory level of enterprises is expected to decline slightly. [2] - The capacity utilization rate of domestic tire enterprises fluctuated slightly last week. The snow - tire orders of semi - steel tires in the domestic market are in the concentrated production period, which still supports the overall operation, while the demand in the replacement market of all - steel tires has not improved significantly, and some enterprises face export pressure. The short - term capacity utilization rate of enterprises may decline slightly. [2] - The short - term price of the br2511 contract is expected to fluctuate in the range of 11390 - 11850. [2] 3. Summary by Relevant Catalogs 3.1 Futures Market - The closing price of the main contract of synthetic rubber is 11545 yuan/ton, with a week - on - week increase of 25 yuan/ton; the position volume is 51154, with a week - on - week decrease of 7496. [2] - The 10 - 11 spread of synthetic rubber is 15 yuan/ton, with a week - on - week decrease of 5 yuan/ton; the total warehouse receipt quantity of butadiene rubber is 2670 tons, with a week - on - week increase of 100 tons. [2] 3.2 Spot Market - The mainstream prices of cis - butadiene rubber from different manufacturers all increased by 50 yuan/ton. [2] - The basis of synthetic rubber is 105 yuan/ton, with a week - on - week increase of 25 yuan/ton. [2] - The price of Brent crude oil is 69.31 dollars/barrel, with a week - on - week increase of 1.68 dollars/barrel; the price of WTI crude oil is 64.99 dollars/barrel, with a week - on - week increase of 1.58 dollars/barrel. [2] - The price of naphtha CFR Japan is 606 dollars/ton, with a week - on - week increase of 8.5 dollars/ton; the price of Northeast Asian ethylene is 840 dollars/ton, with a week - on - week decrease of 5 dollars/ton. [2] - The intermediate price of butadiene CFR China is 1060 dollars/ton, with no change; the market price of butadiene in Shandong is 9315 yuan/ton, with a week - on - week decrease of 85 yuan/ton. [2] 3.3 Upstream Situation - The weekly capacity of butadiene is 15.11 million tons/week, with a week - on - week decrease of 0.01 million tons/week; the capacity utilization rate is 66.78%, with a week - on - week decrease of 1.55 percentage points. [2] - The port inventory of butadiene is 23100 tons, with a week - on - week decrease of 2500 tons; the operating rate of Shandong local refineries' atmospheric and vacuum distillation units is 51.85%, with a week - on - week increase of 1.21 percentage points. [2] - The monthly output of cis - butadiene rubber is 13.57 million tons, with a month - on - month increase of 0.65 million tons; the weekly capacity utilization rate is 69.72%, with a week - on - week decrease of 3.76 percentage points. [2] - The weekly production profit of cis - butadiene rubber is - 658 yuan/ton, with a week - on - week decrease of 149 yuan/ton. [2] - The social inventory of cis - butadiene rubber is 3.37 million tons, with a week - on - week decrease of 0.08 million tons; the manufacturer's inventory is 25900 tons, with a week - on - week decrease of 400 tons; the trader's inventory is 7820 tons, with a week - on - week decrease of 390 tons. [2] 3.4 Downstream Situation - The operating rate of domestic semi - steel tires is 73.66%, with a week - on - week increase of 0.2 percentage points; the operating rate of all - steel tires is 65.66%, with a week - on - week increase of 0.07 percentage points. [2] - The monthly output of all - steel tires is 13.03 million pieces, with a month - on - month increase of 280,000 pieces; the monthly output of semi - steel tires is 58.06 million pieces, with a month - on - month increase of 1.09 million pieces. [2] - The inventory days of all - steel tires in Shandong are 39.13 days, with a week - on - week increase of 0.3 days; the inventory days of semi - steel tires in Shandong are 46.02 days, with a week - on - week increase of 0.08 days. [2] 3.5 Industry News - As of September 24, the inventory of domestic cis - butadiene rubber sample enterprises was 32,300 tons, a decrease of 0.14 million tons from the previous period, a week - on - week decrease of 4.21%. [2] - As of September 18, the capacity utilization rate of Chinese semi - steel tire sample enterprises was 72.74%, a week - on - week increase of 0.13 percentage points and a year - on - year decrease of 6.92 percentage points; the capacity utilization rate of all - steel tire sample enterprises was 66.36%, a week - on - week increase of 0.05 percentage points and a year - on - year increase of 6.18 percentage points. [2] - In August 2025, the output of Chinese cis - butadiene rubber was 13.57 million tons, an increase of 0.65 million tons from the previous month, a month - on - month increase of 5.02% and a year - on - year increase of 30.73%. [2]