证券研究报告 大炼化周报：PTA供应端发生变化，产品价格上涨 大化工首席分析师：陈淑娴，CFA 执业证书编号：S0600523020004 联系方式：chensx@dwzq.com.cn 石化化工分析师：周少玟 执业证书编号：S0600525070005 联系方式：zhoushm@dwzq.com.cn 2025年12月28日 请务必阅读正文之后的免责声明部分 投资要点 3. 风险提示 3 目录 2 ◼ 【国内外重点炼化项目价差跟踪】国内重点大炼化项目本周价差为2640元/吨，环比-2元/吨（环比-0%）；国外重 点大炼化项目本周价差为1254元/吨，环比-45元/吨（环比-3%）。 ◼ 【聚酯板块】本周POY/FDY/DTY行业均价分别为6386/6625/7707元/吨，环比分别+93/+89/+21元/吨， POY/FDY/DTY行业周均利润为-189/-296/-175元/吨，环比分别-131/-133/-178元/吨，POY/FDY/DTY行业库存 为19.0/16.1/21.9天，环比分别+0.0/-8.2/-3.0天，长丝开工率为89.4%，环比+0.2pct。下游方面，本周织机开工 率为60. ...

证券研究报告 大炼化周报：成本端支撑减弱，长丝价格下滑 大化工首席分析师：陈淑娴，CFA 执业证书编号：S0600523020004 联系方式：chensx@dwzq.com.cn 石化化工分析师：周少玟 执业证书编号：S0600525070005 联系方式：zhoushm@dwzq.com.cn 2025年12月21日 请务必阅读正文之后的免责声明部分 投资要点 2 ◼ 【国内外重点炼化项目价差跟踪】国内重点大炼化项目本周价差为2674元/吨，环比+104元/吨（环比+4%）；国 外重点大炼化项目本周价差为1305元/吨，环比-24元/吨（环比-2%）。 ◼ 【聚酯板块】本周POY/FDY/DTY行业均价分别为6293/6536/7686元/吨，环比分别-111/-125/-61元/吨， POY/FDY/DTY行业周均利润为-58/-163/+3元/吨，环比分别-75/-85/-42元/吨，POY/FDY/DTY行业库存为 19.0/24.3/24.9天，环比分别+2.3/+2.1/+1.0天，长丝开工率为89.1%，环比-0.7pct。 ◼ 【炼油板块】国内成品油:本周汽油/柴油/航煤价格下跌。美国成品油 ...

证券研究报告 行业研究——周报 [Table_ReportType] [Table_StockAndRank] 石油加工行业 刘红光 石化行业联席首席分析师 执业编号：S1500525060002 邮箱：liuhongguang@cindasc.com 刘奕麟 石化行业分析师 执业编号：S1500524040001 邮箱：liuyilin@cindasc.com 信达证券股份有限公司 CINDASECURITIESCO.，LTD 北京市西城区宣武门西大街甲127号金隅大厦B 座 邮编：100031 [Table_Title] 大炼化周报：冬季下游备货需求步入尾声， 涤纶长丝小幅累库 [Table_ReportDate0] 2025 年 12 月 20 日 本期内容提要： [Table_Author] ➢ 国内外重点炼化项目价差跟踪： [Table_Summary] [Table_Summary] 截至 12 月 19 日当周，国内重点大 炼化项目价差为 2540.74 元/吨，环比变化+7.17 元/吨（+0.28%）； 国外重点大炼化项目价差为 1303.62 元/吨，环比变化-27.50 元/吨（- 2. ...

Investment Rating - The report does not explicitly state an investment rating for the oil refining industry Core Insights - The report highlights a seasonal decline in demand and weak cost support, leading to a downward trend in chemical product price spreads [2] - Domestic key refining project price spread is 2527.61 CNY/ton, with a week-on-week increase of 22.27 CNY/ton (+0.89%), while the international key refining project price spread is 1330.98 CNY/ton, with a week-on-week decrease of 6.23 CNY/ton (-0.47%) [3] - Brent crude oil weekly average price is 62.00 USD/barrel, with a week-on-week decrease of 1.73% [2] Summary by Sections Refining Sector - Positive signals in China-US trade relations boosted market risk appetite, while concerns over Russian supply supported international oil prices [2] - Brent and WTI crude oil prices on December 12, 2025, were 61.12 USD/barrel and 57.44 USD/barrel, respectively, down by 2.63 USD/barrel and 2.64 USD/barrel from December 5, 2025 [2] - Domestic refined oil prices showed slight fluctuations, with diesel and aviation kerosene prices in Southeast Asia experiencing minor increases, while other regions saw price declines [2] Chemical Sector - The industry is entering a demand off-season, with weak cost support leading to a decline in chemical product prices and spreads [2] - Polyolefins prices and spreads have decreased due to a continuous decline in terminal operating levels [2] - EVA prices have dropped due to supply pressure from new installations and weak demand, with the average price at 10028.57 CNY/ton [2] - Benzene prices remained stable, with a slight increase in spreads, while styrene prices increased due to tight supply [2] Major Refining Companies - Stock price changes for six major private refining companies as of December 12, 2025, include: Rongsheng Petrochemical (-4.69%), Hengli Petrochemical (-5.22%), Dongfang Shenghong (-0.96%), Hengyi Petrochemical (-1.09%), Tongkun Co. (-6.62%), and Xin Fengming (-9.99%) [2]

Investment Rating - The industry investment rating is "Positive" based on the performance of the refining sector and the overall market conditions [150]. Core Insights - The report highlights that low inventory levels of polyester filament support product prices and improve profitability [1]. - The Brent crude oil average price for the week ending November 7, 2025, was $64.23 per barrel, reflecting a decrease of 1.45% [2][3]. - Domestic and international refining project price differentials have shown positive trends, with domestic projects at 2327.79 CNY/ton (+0.78%) and international projects at 1361.85 CNY/ton (+4.33%) [2][3]. Summary by Sections Refining Sector - The report notes that international oil prices experienced fluctuations due to various geopolitical factors and economic data, with Brent and WTI prices at $63.63 and $59.75 per barrel, respectively [15]. - Domestic refined oil prices showed slight fluctuations, with diesel, gasoline, and aviation kerosene averaging 6682.71 CNY/ton, 7614.29 CNY/ton, and 5865.29 CNY/ton [15]. Chemical Sector - The chemical market is described as relatively weak, with no significant improvement in price differentials despite declining costs [2]. - Polypropylene prices and differentials have shown stability, with average prices for various types of polypropylene reported [56][71]. Polyester & Nylon Sector - The report indicates that polyester filament supply is supported by low inventory levels, leading to slight price increases [90]. - The average prices for polyester filament types are reported, with POY at 6507.14 CNY/ton, FDY at 6721.43 CNY/ton, and DTY at 7803.57 CNY/ton [108]. Market Performance of Major Refining Companies - The report tracks the stock performance of six major refining companies, with notable increases in stock prices for companies like Rongsheng Petrochemical (+5.99%) and Hengli Petrochemical (+8.02%) over the past week [137][140]. - The overall performance of the refining index has increased by 52.08% since September 4, 2017, outperforming the broader market indices [138].

Report Information - Report Title: Big Refining Weekly Report: PTA Industry Development Symposium Held, Pay Attention to the Advancement of Anti-Involution in the Chemical Industry [1] - Report Date: November 2, 2025 [1] - Analysts: Chen Shuxian, Zhou Shaowen [1] Industry Investment Rating - Not provided in the given content Core Viewpoints - The report provides a comprehensive analysis of the big refining industry, including the performance of key refining projects, the polyester, refining, and chemical sectors, and the market performance of related listed companies [2] Summary by Directory 1. Big Refining Weekly Data Briefing - **Price and Spread Data**: Domestic key big refining project spread is 2,450 yuan/ton, down 90 yuan/ton (down 4%) week-on-week; foreign key big refining project spread is 1,302 yuan/ton, up 79 yuan/ton (up 6%) week-on-week [2] - **Polyester Sector**: POY/FDY/DTY industry average prices are 6,429/6,679/7,779 yuan/ton, up 21/61/46 yuan/ton respectively; POY/FDY/DTY industry weekly average profits are -17/-116/17 yuan/ton, down 88/62/72 yuan/ton respectively; POY/FDY/DTY industry inventories are 8.5/18.3/24.5 days, down 3.3/3.6/5.0 days respectively; filament开工率 is 90.9%, down 0.1 pct; downstream loom开工率 is 69.0%, up 2.6 pct; weaving enterprise raw material inventory is 14.0 days, up 2.9 days; weaving enterprise finished product inventory is 23.0 days, down 1.1 days [2] - **Refining Sector**: Domestic refined oil: gasoline/diesel prices declined this week; US refined oil: US gasoline/diesel/aviation kerosene prices rose this week [2] - **Chemical Sector**: This week's PX average price is 820.7 US dollars/ton, up 26.3 US dollars/ton; the spread to crude oil is 344.9 US dollars/ton, up 8.2 US dollars/ton; PX开工率 is 87.1%, up 0.8 pct [2] - **Related Listed Companies**: Private big refining & polyester filament: Hengli Petrochemical, Rongsheng Petrochemical, Hengyi Petrochemical, Tongkun Co., Ltd., Xin凤鸣 [2] 2. Big Refining Weekly Report 2.1 Big Refining Index and Project Spread Trends - **Market Performance Comparison**: The report presents the price trends and spreads of domestic and foreign big refining projects, as well as the market performance of six private big refining companies compared to the Shanghai and Shenzhen 300 Index, the petroleum and petrochemical index, and the Brent crude oil price [13][15][17] 2.2 Polyester Sector - **Price and Profit Analysis**: The report analyzes the prices, spreads, and profits of various polyester products, including PX, PTA, MEG, POY, FDY, DTY, polyester staple fiber, and polyester bottle chips, as well as their relationships with raw material prices and inventories [23][24][35] - **开工率 and Inventory Analysis**: It also examines the开工率 and inventory levels of polyester products and their downstream industries, such as looms, and analyzes the seasonal distribution of polyester filament production and sales rates [30][42][56] 2.3 Refining Sector - **Domestic Refined Oil**: The report analyzes the prices and spreads of domestic gasoline, diesel, and aviation kerosene compared to crude oil prices [78][80][87] - **US Refined Oil**: It also examines the prices and spreads of US gasoline, diesel, and aviation kerosene compared to crude oil prices [92][94][101] - **European Refined Oil**: The report analyzes the prices and spreads of European gasoline, diesel, and aviation kerosene compared to crude oil prices [106][108][114] - **Singapore Refined Oil**: It also examines the prices and spreads of Singapore gasoline, diesel, and aviation kerosene compared to crude oil prices [118][120][126] 2.4 Chemical Sector - **Price and Spread Analysis**: The report analyzes the prices and spreads of various chemical products, including polyethylene, polypropylene, EVA, styrene, acrylonitrile, PC, MMA, etc., compared to crude oil prices [132][141]

Investment Rating - The industry investment rating is "Positive" as the industry index is expected to outperform the benchmark [150] Core Insights - The report highlights an improvement in demand for polyester filament yarn, leading to a continued reduction in inventory levels [2] - The Brent crude oil average price for the week ending October 31, 2025, was $65.18 per barrel, reflecting a week-on-week increase of 3.96% [2][3] - Domestic and international refining project price differentials were tracked, with domestic projects at 2337.32 CNY/ton, down 1.97%, and international projects at 1303.72 CNY/ton, up 6.53% [2][3] Refining Sector Summary - The market is questioning the effectiveness of sanctions against Russia, while OPEC+ is inclined to slightly increase production in December [2] - The EIA inventory data provided positive support, alleviating concerns over trade tensions [2] - As of October 31, 2025, the prices for Brent and WTI crude oil were $65.07 and $60.98 per barrel, respectively [2][14] Chemical Sector Summary - Chemical prices generally declined, with significant narrowing of price differentials [2] - Polyolefins showed stable price movements, while EVA continued to weaken with noticeable price drops [2] - Benzene prices faced downward pressure due to high invisible inventory levels, leading to slight price fluctuations [2] Polyester & Nylon Sector Summary - Demand for polyester filament yarn has rebounded, with inventory levels decreasing significantly [2] - The government has introduced policies to optimize the supply structure, improving medium to long-term supply-demand expectations [2] - The average prices for polyester filament yarn were reported as follows: POY at 6439.29 CNY/ton, FDY at 6675.00 CNY/ton, and DTY at 7725.00 CNY/ton [2][87] Major Refining Companies Performance - The stock price changes for six major refining companies as of October 31, 2025, were as follows: Rongsheng Petrochemical (+2.62%), Hengli Petrochemical (+6.40%), Dongfang Shenghong (-1.18%), Hengyi Petrochemical (-4.15%), Tongkun Co. (-0.49%), and Xin Fengming (+1.53%) [2][137]

1. Report Industry Investment Rating There is no information provided regarding the industry investment rating in the given content. 2. Core Viewpoints of the Report The report presents a comprehensive analysis of the large refining and chemical industry, covering key aspects such as project spreads, product prices, profit margins, inventory levels, and operating rates across different segments including polyester, refining, and chemicals. It also tracks the performance and financial forecasts of major private refining and chemical companies [2][8][9]. 3. Summary According to Relevant Catalogs 3.1. Big Refining Weekly Data Briefing - **Project Spreads**: Domestic key large refining projects had a weekly spread of 2,564 yuan/ton, a decrease of 24 yuan/ton (1% decrease) compared to the previous week. Foreign key large refining projects had a weekly spread of 1,212 yuan/ton, a decrease of 2 yuan/ton (0% decrease) [2]. - **Polyester Sector**: POY/FDY/DTY industry average prices were 6,407/6,618/7,732 yuan/ton respectively, with week - on - week decreases of 114/79/54 yuan/ton. Their weekly average profits were 72/ - 54/88 yuan/ton, down 54/30/14 yuan/ton week - on - week. Inventory levels were 11.8/21.9/29.5 days, down 5.0/4.2/2.0 days. The filament开工率 was 91.0%, a 0.0 percentage point decrease. Downstream, the loom operating rate was 66.5%, up 2.4 percentage points, and the raw material inventory of weaving enterprises was 11.1 days, up 0.9 days, while the finished product inventory was 24.0 days, down 1.7 days [2]. - **Refining Sector**: Domestic refined oil prices of gasoline, diesel, and aviation kerosene decreased this week. In the US, the price of aviation kerosene decreased [2]. - **Chemical Sector**: The average price of PX this week was 794.4 dollars/ton, an increase of 6.9 dollars/ton compared to the previous week, and the spread over crude oil was 336.7 dollars/ton, up 4.5 dollars/ton. The PX operating rate was 86.3%, a 1.0 percentage point decrease [2]. - **Related Listed Companies**: Private large refining and polyester filament companies include Hengli Petrochemical, Rongsheng Petrochemical, Hengyi Petrochemical, Tongkun Co., Ltd., and Xin凤鸣 [2]. 3.2. Big Refining Weekly Report 3.2.1. Big Refining Index and Project Spread Trends The report provides historical data and trends on the performance of the large refining index, including the comparison of the performance of the petrochemical index and six private large refining companies over different time periods (recent week, recent month, recent three months, recent year, and since the beginning of 2025). It also shows the trends of domestic and foreign large refining project spreads in relation to Brent oil prices [8]. 3.2.2. Polyester Sector - **Price and Profit Analysis**: Analyzes the prices, spreads, and profit margins of various polyester products such as PX, MEG, PTA, POY, FDY, DTY, polyester staple fiber, and polyester bottle chips. It also examines the relationships between these products and raw materials like crude oil and PTA [9]. - **Operating Rate and Inventory Analysis**: Tracks the operating rates of PX, PTA, MEG, and polyester filaments, as well as the inventory levels of PTA, polyester filaments, and polyester staple fiber. It also analyzes the operating rates and inventory levels of downstream weaving enterprises [9]. - **Sales and Production Ratio**: Analyzes the sales - to - production ratios of polyester filaments and polyester staple fiber in the Jiangsu and Zhejiang regions [47][69]. 3.2.3. Refining Sector - **Domestic Refined Oil**: Compares the prices and spreads of domestic gasoline, diesel, and aviation kerosene with crude oil prices in both yuan/ton and dollars/barrel units [82][84][92]. - **US Refined Oil**: Analyzes the prices and spreads of US gasoline, diesel, and aviation kerosene in relation to crude oil prices in both yuan/ton and dollars/barrel units [94][103]. - **European Refined Oil**: Examines the prices and spreads of European gasoline, diesel, and aviation kerosene in relation to crude oil prices in both yuan/ton and dollars/barrel units [108][115]. - **Singapore Refined Oil**: Analyzes the prices and spreads of Singapore gasoline, diesel, and aviation kerosene in relation to crude oil prices in both yuan/ton and dollars/barrel units [120][130]. 3.2.4. Chemical Sector Analyzes the prices and spreads of various chemical products such as polyethylene LLDPE, EVA foaming material, EVA photovoltaic material, homopolymer polypropylene, styrene, acrylonitrile, PC, MMA, etc., in relation to crude oil prices [136][146].

Investment Rating - The industry investment rating is "Positive" as indicated by the report's outlook on the refining sector [149]. Core Insights - The report highlights a rebound in oil prices, which has led to an increase in inventory replenishment among textile enterprises, resulting in a significant reduction in long filament inventory [1]. - Brent crude oil prices increased to $65.94 per barrel, up by $4.65 from the previous week, while WTI prices rose to $61.50 per barrel, an increase of $3.96 [1][13]. - The report notes that the domestic price difference for key refining projects is 2374.85 CNY/ton, a decrease of 30.36 CNY/ton (-1.26%) week-on-week, while the international price difference is 1213.16 CNY/ton, down by 2.88 CNY/ton (-0.24%) [2]. Refining Sector Summary - The report discusses the impact of geopolitical events on oil prices, including potential trade agreements between the US and China, and sanctions against Russia, which have contributed to a favorable environment for oil price recovery [1][13]. - The report indicates that the refining sector is experiencing a mixed performance, with some companies seeing stock price increases while others face declines [1][136]. Chemical Sector Summary - The chemical sector is facing weak overall demand, with oil price rebounds not translating into significant price support for chemical products [1]. - Specific products such as EVA and pure benzene have seen price declines due to weak downstream demand, leading to narrowed price differentials [1][51]. Polyester & Nylon Sector Summary - The report notes that polyester filament prices have slightly decreased, but the rebound in oil prices has stimulated replenishment sentiment among downstream textile enterprises, leading to a notable reduction in filament inventory [1][89]. - The average price for polyester filament is reported at 6439.29 CNY/ton for POY, with a slight decrease in profitability [1][112].

1. Report Industry Investment Rating No specific industry investment rating is provided in the given text. 2. Core Viewpoints The report presents a weekly overview of the large refining and chemical industry, including data on domestic and foreign refining projects, the polyester, refining, and chemical sectors, as well as performance data of related listed companies. It shows that costs have weak support and filament market prices are declining. [2] 3. Summary by Relevant Catalogs 3.1 Big Refining Weekly Data Briefing - **Price and Spread Data**: The spread of domestic key large refining projects this week was 2,636 yuan/ton, a week - on - week increase of 122 yuan/ton (5%); the spread of foreign key large refining projects was 1,219 yuan/ton, a week - on - week increase of 67 yuan/ton (6%). International crude oil prices fell, with Brent at 62.4 dollars/barrel, down 2.8 dollars/barrel (-4.3%) week - on - week, and WTI at 58.6 dollars/barrel, down 2.8 dollars/barrel (-4.5%) week - on - week. [2][8] - **Polyester Sector**: POY/FDY/DTY industry average prices were 6,521/6,696/7,786 yuan/ton respectively, down 121/100/89 yuan/ton week - on - week. Their weekly average profits were 126/-24/102 yuan/ton respectively, up 4/18/25 yuan/ton week - on - week. POY/FDY/DTY inventories were 16.8/26.1/31.5 days respectively, up 3.2/2.0/2.6 days week - on - week. The filament开工 rate was 91.1%, unchanged week - on - week. [2] - **Refining Sector**: Domestic and US gasoline, diesel, and aviation kerosene prices all decreased this week. [2] - **Chemical Sector**: The average PX price this week was 787.6 dollars/ton, down 16.0 dollars/ton week - on - week, and the spread to crude oil was 332.2 dollars/ton, up 4.3 dollars/ton week - on - week. The PX开工 rate was 87.5%, down 0.4 pct week - on - week. [2] - **Listed Companies**: Related listed companies include Hengli Petrochemical, Rongsheng Petrochemical, Hengyi Petrochemical, Tongkun Co., Ltd., and Xin凤鸣. [2] - **Stock Performance**: The petroleum and petrochemical index fell 2.6% in the past week. Among the six private refining companies, Tongkun Co., Ltd. had the largest decline of 12.4%, while Xin Fengming had a relatively large increase in the past three months and one year. [8] 3.2 Big Refining Weekly Report 3.2.1 Big Refining Index and Project Spread Trends - There are trend charts showing the changes in the Shanghai - Shenzhen 300, petroleum and petrochemical index, Brent crude oil price, and the average index of six large refining companies from 2020 - 2025. [13][15] - There are also trend charts of the market performance of six private large refining companies from 2020 - 2025. [16][17] - Trend charts of the spread of domestic and foreign large refining projects and Brent crude oil prices from 2020 - 2025 are presented. [19][22] 3.2.2 Polyester Sector - Multiple trend charts show the prices and spreads of crude oil, PX, PTA, MEG, and various polyester products from 2020 - 2025, as well as the relationship between their prices and spreads, single - ton net profits, inventories, and开工 rates. [24][25][26] - There are also charts showing the production and sales rates of polyester filaments and short - fibers in the Jiangsu and Zhejiang regions, as well as their annual distribution. [49][50][72] 3.2.3 Refining Sector - Trend charts of the prices and spreads of domestic, US, European, and Singapore gasoline, diesel, and aviation kerosene to crude oil from 2020 - 2025 are provided. [83][84][85] 3.2.4 Chemical Sector - Trend charts of the prices and spreads of various chemical products such as polyethylene, polypropylene, EVA, styrene, acrylonitrile, PC, and MMA to crude oil from 2020 - 2025 are presented. [136][137][147]