Group 1: PVC Market Overview - PVC futures have shown a "V" shaped trend since June 2025, with market logic returning to fundamentals after a period of "anti-involution" [1] - As of now, 1.75 million tons of new PVC production capacity has been added in 2025, with major contributions from companies like Xinpu Chemical and Wanhu Fujian [1] - The total production capacity for PVC is expected to reach 1.95 million tons this year, reflecting a year-on-year growth rate of approximately 7% [1] Group 2: Supply and Production Data - From January to September 2025, the cumulative PVC production reached 18.11 million tons, a year-on-year increase of 4.11%, with ethylene-based production growing by 9.78% [1] - The supply pressure is primarily driven by ethylene-based production, and with fewer maintenance activities in the fourth quarter, supply-side pressure is expected to increase further [1] Group 3: Demand and Real Estate Impact - PVC is closely linked to the real estate sector, which has seen a decline in investment and construction activities, with a 13.9% drop in real estate development investment from January to September 2025 [2] - The operating rates for downstream products, particularly those related to real estate, remain at historically low levels, indicating weak domestic demand for PVC [2] Group 4: Export Dynamics - Cumulative PVC powder exports from January to September 2025 reached 2.92 million tons, a significant year-on-year increase of 51%, with major markets including India and Vietnam [3] - However, the potential for export decline in the fourth quarter is a concern due to India's anti-dumping tax adjustments and ongoing trade tensions [3] Group 5: Inventory and Pricing - Domestic PVC social inventory stands at 1.0338 million tons, showing a slight decrease from the previous month but a year-on-year increase of 24.48% [3] - The prices of raw materials like calcium carbide and ethylene remain low, contributing to ongoing losses in production methods, yet the overall PVC operating rate has not decreased due to acceptable chlor-alkali profits [4] Group 6: Overall Market Sentiment - The PVC market is characterized by significant supply pressure and weak demand, particularly influenced by the downturn in the real estate sector [4] - The overall sentiment remains bearish, with caution advised for bottom-fishing strategies, while monitoring for potential stabilization signals in the market [4]

Report Industry Investment Rating - No investment rating is provided in the report. Core Viewpoints - The PVC market is under significant pressure due to high social inventory, upcoming end of equipment maintenance, average spot trading, and high futures warehouse receipts. However, the recent major conference may affect macro - sentiment, and the cost side of PVC has strengthened. It is recommended to exit and wait and see [1]. Summary by Related Catalogs Market Analysis - The calcium carbide price in the upstream northwest region is stable. The PVC operating rate decreased by 5.94 percentage points to 76.69% on a month - on - month basis, still at a relatively high level in recent years. After the National Day, the downstream recovery of PVC was significant, but it is still at a relatively low level in the same period over the years. India postponed the BIS policy for another six months until December 24, 2025. Formosa Plastics in Taiwan, China, lowered its November quotation by $30 - 40 per ton. India increased the anti - dumping duty on imported PVC from the Chinese mainland by about $50 per ton on August 14, weakening the export expectation of Chinese PVC in the fourth quarter. However, after the recent decline in export prices, export orders have not weakened significantly. The real estate is still in the adjustment stage, and it will take time to improve [1]. Futures and Spot Market - The PVC2601 contract decreased in positions and fluctuated. The lowest price was 4,670 yuan per ton, the highest was 4,725 yuan per ton, and it finally closed at 4,699 yuan per ton, below the 20 - day moving average, with a decline of 0.47%. The position volume decreased by 14,260 lots to 1,191,906 lots [2]. - On October 21, the mainstream price of calcium carbide - based PVC in East China dropped to 4,625 yuan per ton. The futures closing price of the V2601 contract was 4,699 yuan per ton. The current basis was - 74 yuan per ton, weakening by 16 yuan per ton, and the basis was at a relatively low - neutral level [3][4]. Fundamental Tracking - Supply side: Some devices such as Shandong Xinfa, Lutai Chemical, and Inner Mongolia Junzheng entered maintenance. The PVC operating rate decreased by 5.94 percentage points to 76.69% on a month - on - month basis. New production capacities have been put into operation, including Wanhua Chemical with an annual capacity of 500,000 tons in August, Tianjin Bohua with an annual capacity of 400,000 tons expected to be in stable production by the end of September, Qingdao Gulf with an annual capacity of 200,000 tons put into operation in early September and approaching full - load production, and Gansu Yaowang and Jiaxing Jiahua with annual capacities of 300,000 tons each running at low loads after trial production [5]. - Demand side: The real estate is still in the adjustment stage. From January to September 2025, the national real estate development investment was 677.06 billion yuan, a year - on - year decrease of 13.9%. The sales area of commercial housing was 658.35 million square meters, a year - on - year decrease of 5.5%. The sales volume of commercial housing was 630.4 billion yuan, a decrease of 7.9%. The new construction area of houses was 453.99 million square meters, a year - on - year decrease of 18.9%. The construction area of real estate development enterprises was 6.4858 billion square meters, a year - on - year decrease of 9.4%. The completed area of houses was 311.29 million square meters, a year - on - year decrease of 15.3%. As of the week of October 19, after the National Day, the commercial housing transaction area in 30 large - and medium - sized cities increased by 54.79% on a month - on - month basis, but it was at the lowest level in the same period in recent years [6]. - Inventory: As of the week of October 16, the PVC social inventory decreased by 0.24% on a month - on - month basis to 1.0338 million tons, 33.52% higher than the same period last year. The social inventory decreased slightly but was still relatively high [7].

Report Summary 1) Report Industry Investment Rating No investment rating information is provided in the report. 2) Core Viewpoint The report predicts that plastics will experience a weak and volatile trend in the near future. Factors such as the signing of a cease - fire agreement between Israel and Hamas, OPEC+ planning to increase production in November, the escalation of Sino - US trade frictions, and insufficient downstream purchasing willingness contribute to this prediction. Although the peak season of agricultural film may bring some support, the overall situation remains under pressure[1]. 3) Summary by Relevant Catalogs [行情分析] - On October 21, the number of maintenance devices changed little, and the plastics operating rate remained at around 86%, at a neutral level. The downstream operating rate of PE increased by 0.56 percentage points to 44.92%. Agricultural film entered the peak season, but the peak season was less than expected, and the post - National Day stocking demand weakened. New production capacity was put into operation, and the plastics operating rate decreased slightly. With concerns about economic growth and no actual anti - involution policies in the plastics industry, plastics are expected to oscillate weakly in the near future[1]. [期现行情] - **Futures**: The plastics 2601 contract decreased in positions and oscillated. The lowest price was 6,830 yuan/ton, the highest was 6,915 yuan/ton, and it closed at 6,883 yuan/ton, below the 60 - day moving average, with a decline of 0.38%. The position volume decreased by 135 lots to 561,965 lots[2]. - **Spot**: Most of the PE spot market declined, with price changes ranging from - 150 to + 0 yuan/ton. LLDPE was reported at 6,790 - 7,470 yuan/ton, LDPE at 8,930 - 9,930 yuan/ton, and HDPE at 7,260 - 8,090 yuan/ton[3]. [基本面跟踪] - **Supply**: On October 21, the number of maintenance devices changed little, and the plastics operating rate remained at around 86%, at a neutral level[1][4]. - **Demand**: As of the week of October 17, the downstream operating rate of PE increased by 0.56 percentage points to 44.92%. After the National Day, agricultural film orders and raw material inventories increased but were still lower than in previous years. Packaging film orders decreased slightly, and the overall downstream operating rate of PE was at a relatively low level in the same period in recent years[1][4]. - **Inventory**: During the National Day holiday, the petrochemical inventory increased by 270,000 tons, and on Tuesday, it decreased by 10,000 tons to 790,000 tons, 35,000 tons lower than the same period last year. The inventory accumulation during the National Day this year was similar to previous years, and the current petrochemical inventory was at a neutral level in the same period in recent years[1][4]. - **Raw Materials**: The Brent crude oil 01 contract fell below $61 per barrel. The price of Northeast Asian ethylene remained flat at $770 per ton, and the price of Southeast Asian ethylene remained flat at $780 per ton[4].

Report Industry Investment Rating No relevant content provided. Core Viewpoints of the Report - The listing of the three chemical monthly average price futures fills the gap in domestic average price risk management tools, and its cash - settlement mechanism facilitates long - term trade in the chemical industry, marking a new stage in the ability of China's chemical derivatives market to serve the real economy [10]. - These futures can meet the more refined and diversified risk management needs of industrial enterprises, provide a smoother price reference for the industry, enrich the futures market tool system, and enhance China's influence in plastic pricing [6]. - They will form a "complementary and progressive" pattern with existing physical delivery futures, jointly build a more complete chemical derivatives ecosystem, and further enhance China's international influence on chemical prices [7]. Summary According to the Table of Contents Preface - On October 20, 2025, DCE officially announced the listing of linear low - density polyethylene (LLDPE), polyvinyl chloride (PVC), and polypropylene (PP) monthly average price futures, which will be listed for trading at 21:00 on October 28, 2025. This listing fills the gap in domestic average price risk management tools and marks a new level in the ability of China's chemical derivatives market to serve the real economy [10]. Chapter 1: Futures Product Background and Strategic Significance - As the marketization of the chemical industry increases, the demand for price risk management from upstream and downstream enterprises in the industrial chain becomes more refined. Traditional futures contracts cannot precisely match the actual demand of some enterprises using "monthly average price" for spot trade settlement. - DCE launched monthly average price futures to provide more accurate and efficient hedging tools for enterprises using the average price model for trade. These contracts use a cash - settlement mechanism, which greatly improves the efficiency and accuracy of risk management and helps enhance China's voice in the international chemical pricing system [11]. Chapter 2: Introduction to the Three Chemical Monthly Average Price Futures Products - The three chemical monthly average price futures are based on the monthly average settlement price of the corresponding physical delivery futures contracts and use a cash - settlement mechanism at maturity. They rely on the fair prices of existing physical delivery futures to provide risk management tools suitable for the monthly "average price trade" model. - In 2024, China's polyethylene, polyvinyl chloride, and polypropylene production capacities were 3571000 tons, 2754000 tons, and 4676000 tons respectively. China's plastic exports have been increasing year by year. Internationally, monthly average price futures have become an important tool in major international futures exchanges [12][14]. Chapter 3: Core Elements of the Three Chemical Monthly Average Price Futures Contract Design - **Contract Basic Parameters**: The trading unit is 5 tons/lot, the quotation unit is yuan (RMB)/ton, the minimum price change is 1 yuan/ton, the contract months are from January to December, and the trading code uses the format of "variety code + contract month + F" [16][17]. - **Listing Time and Listing Arrangement**: They will be listed for trading at 21:00 on October 28, 2025, with night trading. The first - listed contracts are announced, and a "rolling listing" mechanism is adopted to cover six near - month contracts [18][21]. - **Listing Benchmark Price**: The listing benchmark price is the settlement price of the corresponding contract on October 28, 2025 [23]. - **Combined Margin**: The contracts participate in combined margin discounts [23]. - **Position Information Publication**: The exchange will publish relevant trading volume and position information after daily settlement [24]. Chapter 4: Innovation in Delivery Mechanism and Settlement Logic - **Cash - Settlement Method**: There is no physical delivery. The profit and loss of both parties are directly transferred by the exchange according to the final delivery settlement price, which is the arithmetic average of the settlement prices of the corresponding physical delivery futures contracts in the "month before the contract month" [26]. - **Last Trading Day and Delivery Day**: They are the same day, which is the last trading day of the "month before the contract month" [27]. - **Settlement Price Pricing Mechanism**: DCE uses a "phased calculation" model. Before the "month before the contract month", the daily settlement price is directly linked to the daily settlement price of the corresponding physical delivery futures contract. After entering the "month before the contract month", it switches to the "average mode" [29]. Chapter 5: Risk Control System and Trading Rules - **Margin and Price Limit**: The trading margin ratio and price limit range are the same as those of the corresponding physical delivery futures contracts and are adjusted synchronously [31]. - **Handling Fee Standard**: The trading handling fee is 1 yuan/lot (one - way), the hedging trading handling fee is 0.5 yuan/lot (one - way), and the delivery handling fee is 1 yuan/lot. Before December 31, 2025, the delivery handling fee is waived (except for high - frequency traders) [32][33]. - **Trading Limit**: The daily opening limit for LLDPE monthly average price futures is 8000 lots/contract, 18000 lots/contract for PVC, and 10000 lots/contract for PP. Hedging and market - making trades are not subject to this limit [34][35][36]. - **Position Limit**: The position limit is more strictly managed in phases. Before the 14th trading day of the "month before the contract month", if the unilateral position is ≤ 200000 lots, the limit for non - futures company members and customers is 4000 lots; if > 200000 lots, it is 2% of the unilateral position. From the 15th trading day of the "month before the contract month", it is uniformly adjusted to 1000 lots [38][39]. Chapter 6: Trading Instructions and Market Function Expansion - The three chemical monthly average price futures support three types of arbitrage trading instructions: same - variety inter - period arbitrage, cross - variety arbitrage, and different delivery method arbitrage. - Starting from the night session on October 28, 2025, they will be included in the list of tradable products for qualified foreign institutional investors (QFIs) [39][40][41]. Chapter 7: Summary - In the context of overall over - capacity and increasing exports in the plastic industry, these futures can meet the risk management needs of enterprises, enrich the pricing strategies of spot trade, and enhance China's influence on international plastic prices. - DCE will continue to track market operations, optimize contract rules, and explore launching similar products for more varieties to improve China's commodity futures product system and serve the high - quality development of the real economy [42][43].

Market Overview - The plastic sector increased by 1.61% on October 21, with Daoming Optics leading the gains [1] - The Shanghai Composite Index closed at 3916.33, up 1.36%, while the Shenzhen Component Index closed at 13077.32, up 2.06% [1] Top Gainers in the Plastic Sector - Daoming Optics (002632) closed at 10.87, up 10.02% with a trading volume of 377,900 shares and a turnover of 394 million yuan [1] - Tuen Co., Ltd. (002768) closed at 49.77, up 6.96% with a trading volume of 54,300 shares and a turnover of 264 million yuan [1] - Yinhai Technology (300221) closed at 8.83, up 5.75% with a trading volume of 413,200 shares and a turnover of 357 million yuan [1] Decliners in the Plastic Sector - Cangzhou Mingzhu (002108) closed at 4.31, down 2.93% with a trading volume of 1,846,100 shares and a turnover of 795 million yuan [2] - Xiangyuan New Materials (300980) closed at 29.59, down 2.50% with a trading volume of 90,400 shares and a turnover of 269 million yuan [2] - Nanjing Jinglong (300644) closed at 32.01, down 2.38% with a trading volume of 35,600 shares and a turnover of 114 million yuan [2] Capital Flow Analysis - The plastic sector saw a net inflow of 83.05 million yuan from main funds, while retail funds had a net inflow of 27.22 million yuan [2] - The main funds showed a significant net outflow from Daoming Optics, amounting to 41.34 million yuan [3] - Dongcai Technology (601208) experienced a net inflow of 98.74 million yuan from main funds, indicating strong institutional interest [3]

Core Viewpoint - The launch of monthly average price futures for LLDPE, PVC, and PP at Dalian Commodity Exchange aims to enhance liquidity and provide a pricing tool that aligns with the purchasing and sales practices of enterprises in the chemical industry [1][2][3]. Group 1: Launch Details - The first three chemical monthly average price futures will be listed on October 28, with contracts for the months of February, March, and April 2026 [1][3]. - The trading unit for these contracts is set at 5 tons per lot, with a minimum price fluctuation of 1 RMB per ton [2][3]. - The contracts will be included in the range of tradable products for qualified foreign institutional investors starting from the night session on October 28 [1]. Group 2: Pricing Mechanism - The pricing mechanism for the monthly average price futures will utilize a "phased calculation" model to ensure price fairness and mitigate market manipulation risks [3]. - During the month prior to the contract month, the daily settlement price will be directly linked to the corresponding physical delivery futures contract's settlement price [3]. - Once in the contract month, the settlement price will be calculated as an arithmetic average of the actual settlement prices and estimated values, reflecting the "monthly average" pricing logic more accurately [3]. Group 3: Industry Impact - The introduction of monthly average price futures is expected to enrich enterprises' pricing strategies in spot trading, providing a fair average price signal and enabling more diverse risk management strategies [5]. - The launch is seen as a significant step for the plastic industry, enhancing China's pricing influence in the international market and supporting high-quality industrial development [5]. - The Dalian Commodity Exchange aims to create a complementary relationship between the new monthly average price futures and existing physical delivery futures, enhancing the overall ecosystem of chemical derivatives [5].

Core Insights - The production of primary plastic shapes in Heilongjiang Province for the first half of 2025 reached 1.207 million tons, representing a 1.7% decrease compared to the same period in 2024, with a growth rate 18.7 percentage points lower than in 2024 and 12.0 percentage points lower than the national average [1] - In June 2025, the production of primary plastic shapes in Heilongjiang Province was 209,000 tons, showing a 4.2% increase year-on-year, but the growth rate was 76.0 percentage points lower than in June 2024 and 7.9 percentage points lower than the national average [2] Summary by Category Production Data - In the first half of 2025, Heilongjiang's primary plastic production accounted for 1.7% of the national total of 70.123 million tons [1] - The June 2025 production figure of 209,000 tons also represented 1.7% of the national total of 12.032 million tons for that month [2] Year-on-Year Comparison - The first half of 2025 saw a decline in production compared to 2024, with a notable decrease in growth rates [1] - The June 2025 production showed an increase compared to June 2024, but the growth rate was significantly lower than the previous year [2]

Core Insights - The introduction of monthly average futures for LLDPE, PVC, and PP on October 28 aims to enhance risk management tools in the chemical industry, stabilize supply chains, and improve China's influence on plastic pricing [1] Group 1: Monthly Average Futures Overview - The monthly average futures contracts for LLDPE, PVC, and PP are based on the monthly settlement prices of corresponding physical delivery futures, with cash settlement upon expiration [1] - These contracts provide a risk management tool tailored for "average price trading" on a monthly basis, leveraging the fair prices of existing physical delivery futures [1] Group 2: Supply and Demand Situation - China is the largest producer and consumer of plastics globally, with projected capacities for 2024 being 35.71 million tons for polyethylene, 27.54 million tons for PVC, and 46.76 million tons for polypropylene [2] - The production volumes for 2024 are expected to be 27.91 million tons for polyethylene, 23.44 million tons for PVC, and 34.76 million tons for polypropylene, while consumption is projected at 40.94 million tons, 20.89 million tons, and 35.73 million tons respectively [2] - China's plastic exports have been increasing, with PVC exports rising from 63000 tons in 2020 to 262000 tons in 2024, and polypropylene exports increasing from 43000 tons to 235000 tons in the same period [2] Group 3: Rationale for Launching Monthly Average Futures - The launch of these futures is a response to the oversupply in the plastic industry and increasing exports, catering to the refined and diversified risk management needs of industry enterprises [2] - These futures will provide smoother price references and enrich the futures market toolset, enhancing China's pricing influence in the plastic sector [2] Group 4: International Precedents - The introduction of monthly average futures is not unprecedented, as CME launched WTI crude oil monthly average futures in 2006, followed by several international exchanges adopting similar products [3] - Monthly average futures have become essential tools in major international futures exchanges over the years [3]

Core Viewpoint - Ultra High Molecular Weight Polyethylene (UHMWPE) is a critical material in various high-performance applications, particularly in the fields of lithium battery separators and high-strength fibers, driven by the rapid growth of the global electric vehicle industry and geopolitical changes [3][10]. Group 1: Overview of UHMWPE - UHMWPE is a linear thermoplastic engineering plastic with a molecular weight exceeding 1.5 million, known for its exceptional mechanical properties and chemical stability [6][9]. - The material exhibits superior impact resistance, wear resistance, and self-lubrication, making it essential in strategic industries and national defense [3][6]. Group 2: Global Supply and Demand Analysis - In 2023, global UHMWPE production capacity reached approximately 490,000 tons per year, with Asia accounting for 55.1% of this capacity [11]. - The global demand for UHMWPE has been growing at an annual rate of over 10%, with consumption expected to reach around 486,000 tons in 2023, translating to a market size of approximately $7.3 billion [13][21]. - The lithium battery separator market has become the largest application for UHMWPE, with consumption projected to grow at an annual rate of 18% over the next three years [15][23]. Group 3: Domestic Supply and Demand Analysis - As of 2023, China's UHMWPE production capacity stands at 211,000 tons per year, with significant advancements in technology and production capabilities [17][18]. - The apparent consumption of UHMWPE in China is estimated at 432,000 tons in 2023, with nearly half used for lithium battery separators, reflecting the rapid growth of the domestic electric vehicle market [21][23]. - The domestic market for UHMWPE fibers is expected to grow at an annual rate of approximately 12% over the next three years, driven by increasing demand in military and safety applications [23][58]. Group 4: Technological Advances in UHMWPE - The production of UHMWPE primarily utilizes liquid phase slurry polymerization technology, with the Hostalen process being the most widely adopted globally [31][35]. - Recent breakthroughs in production technology include the development of continuous ring pipe slurry processes, enhancing production efficiency and product quality [37][38]. Group 5: Applications of UHMWPE - UHMWPE is increasingly used in lithium battery separators due to its high thermal stability and safety features, making it a preferred choice for electric vehicle batteries [41][42]. - The fiber produced from UHMWPE is recognized for its high strength and modulus, finding applications in military, marine, and safety equipment [43][44]. - In the medical field, UHMWPE is utilized in artificial joints and other medical devices due to its excellent wear resistance and biocompatibility [46]. Group 6: Investment Logic Analysis - The UHMWPE industry presents high growth potential, with significant opportunities in high-end applications such as lithium battery separators and medical-grade materials [60][61]. - Investment opportunities are concentrated in areas addressing core industry challenges, particularly in high-performance catalysts and specialized resin production [62][63]. - The demand for UHMWPE is expected to be driven by the growth of the electric vehicle market and military applications, making it a promising sector for investment [63][64].

Report Summary 1. Industry Investment Rating No industry investment rating is provided in the report. 2. Core Viewpoints - Short - term L2601 is expected to show a volatile trend. Technically, attention should be paid to the previous low support around 6855 and the 10 - day moving average pressure around 6994 [2]. - The overall inventory pressure is not significant, with obvious accumulation in production enterprise inventory and a narrow decline in social inventory [2]. - Oil - made LLDPE cost decreases with the decline of international oil prices, and oil - made profits are restored; coal - made cost decreases slightly, and losses deepen [2]. - PE production and capacity utilization are expected to rise slightly this week. In October, the supply pressure in the industry is relatively high due to fewer new shutdown devices and the upcoming new production capacity [2]. - The downstream shed film is in the peak season, with orders and operating rates gradually rising to the annual high; the new orders for packaging film are limited, and the devices are expected to operate stably [2]. 3. Summary by Relevant Catalogs Futures Market - The closing prices of polyethylene futures main contracts and different - month contracts increased. The 1 - 5 spread decreased. The trading volume increased, while the open interest decreased. The long and short positions of the top 20 futures decreased, and the net long position decreased [2]. - For example, the closing price of the main polyethylene futures contract was 6879 yuan/ton, up 5 yuan/ton; the 1 - 5 spread was - 42, down 9 [2]. Spot Market - The average price of LLDPE (7042) in North China increased slightly, while that in East China decreased slightly. The basis increased [2]. - The average price of LLDPE (7042) in North China was 6996.09 yuan/ton, up 0.43 yuan/ton; in East China, it was 7145.95 yuan/ton, down 4.52 yuan/ton [2]. Upstream Situation - The prices of naphtha and ethylene in the upstream decreased [2]. - The FOB middle - price of naphtha in Singapore was 58.33 US dollars/barrel, down 0.99 US dollars; the CFR middle - price of naphtha in Japan was 537 US dollars/ton, down 8.5 US dollars [2]. Industry Situation - The national PE petrochemical operating rate decreased [2]. - The national PE petrochemical operating rate was 81.76%, down 2.19% [2]. Downstream Situation - The operating rates of different polyethylene downstream products varied. The operating rate of packaging film decreased slightly, that of pipes increased slightly, and that of agricultural film increased significantly [2]. - The operating rate of polyethylene packaging film was 52.19%, down 0.7%; that of pipes was 32%, up 0.33%; that of agricultural film was 42.89%, up 7.28% [2]. Option Market - The historical and implied volatilities of polyethylene options decreased [2]. - The 20 - day historical volatility of polyethylene was 8.45%, down 0.02%; the implied volatility of at - the - money put and call options decreased [2]. Industry News - From October 10th to 16th, PE production decreased by 2.05% to 65.06 tons, and the capacity utilization rate decreased by 2.19% to 81.76%. The average operating rate of Chinese polyethylene downstream products increased by 0.55%, and the overall operating rate of agricultural film increased by 7.3% [2]. - As of October 15th, the inventory of Chinese polyethylene production enterprises was 52.95 tons, up 8.37%; as of October 17th, the social inventory of polyethylene was 54.54 tons, down 0.05% [2]. - From October 11th to 17th, the cost of oil - made LLDPE decreased by 3.34% to 7166 yuan/ton, and the oil - made profit increased by 140.29 yuan/ton to - 80.71 yuan/ton; the cost of coal - made LLDPE decreased by 0.86% to 6507 yuan/ton, and the coal - made profit decreased by 76.15 yuan/ton to 494.14 yuan/ton [2].