Report Industry Investment Ratings - No specific industry investment ratings are provided in the report. Core Views - The inventory of steel decreased month - on - month, and steel prices rebounded. The cost of glass and soda ash increased, and their prices rebounded from the low level. The prices of ferrosilicon and silicomanganese futures rose slightly, while the spot market remained on the sidelines [1][3]. - Glass prices are expected to be volatile and weak, and soda ash prices are also expected to be volatile and weak. Silicomanganese and ferrosilicon prices are expected to remain volatile [2][4]. Market Analysis and Strategy for Different Products Glass and Soda Ash - **Market Analysis** - Glass futures fluctuated strongly yesterday with active trading. The spot market was cautious, and enterprises offered flexible prices. The supply of glass is on a low - level upward trend, the inventory of middle - stream traders is high and still accumulating. With the end of the consumption peak season approaching and the possibility of some production lines resuming production, glass demand is expected to weaken further [1]. - Soda ash futures also fluctuated strongly yesterday with relatively active trading. The downstream's purchasing enthusiasm was low, mainly for rigid demand. The supply - demand contradiction of soda ash remains prominent, with supply at a high level and still having growth expectations. The demand side has some resilience, and inventory reduction pressure persists throughout the year [1]. - **Strategy** - Glass: Volatile and weak [2]. - Soda ash: Volatile and weak [2]. Silicomanganese and Ferrosilicon - **Market Analysis** - For silicomanganese, the main contract of silicomanganese futures rose slightly yesterday. The silicomanganese market fluctuated, and the market was cautious. The price of 6517 silicomanganese in the northern market was 5630 - 5680 yuan/ton, and in the southern market was 5650 - 5700 yuan/ton. From January to August, India's cumulative export volume of silicomanganese was 761,400 tons, a year - on - year decrease of 0.90%; the cumulative import volume was 15,000 tons, a year - on - year decrease of 8.98%. Silicomanganese enterprises' losses have intensified, production is high, and with the decline of hot metal, demand has weakened. Considering the futures discount to the spot, the price is expected to remain volatile [3]. - For ferrosilicon, the main contract of ferrosilicon futures fluctuated and rose yesterday. The spot price was stable. The price of 72 - grade ferrosilicon natural block in Ningxia was 5150 - 5200 yuan/ton, the 72 - grade ferrosilicon standard block was quoted at 5250 - 5300 yuan/ton, and the 75 - grade ferrosilicon was quoted at 5800 yuan/ton. Currently, the production of ferrosilicon enterprises has decreased slightly, enterprises are continuously losing money, and the motivation to increase production is insufficient. The downstream demand for ferrosilicon has begun to weaken, and the inventory of sample enterprises has increased [3]. - **Strategy** - Silicomanganese: Volatile [4]. - Ferrosilicon: Volatile [4].

1. Report Industry Investment Ratings - Copper: Not clearly defined [1] - Aluminum: Not clearly defined [1] - Alumina: Not clearly defined [1] - Cast Aluminum Alloy: Not clearly defined [1] - Zinc: ★☆☆ (One star, indicating a bullish bias) [1] - Nickel and Stainless Steel: ★☆☆ (One star, indicating a bullish bias) [1] - Tin: ★☆☆ (One star, indicating a bullish bias) [1] - Lithium Carbonate: Not clearly defined [1] - Industrial Silicon: Not clearly defined [1] - Polysilicon: ★☆☆ (One star, indicating a bullish bias) [1] 2. Core Viewpoints of the Report - The report provides a daily analysis of various non - ferrous metals, including their price trends, supply - demand fundamentals, and market sentiment, and gives corresponding price trend forecasts for each metal [2][3][4] 3. Summary by Metal Copper - Thursday, SHFE copper fluctuated around 85,000 yuan. SMM spot copper was reported at 85,175 yuan, with a premium of 60 yuan in Shanghai. Social inventory increased by 5,500 tons to 177,500 tons this week [2] - The US government shutdown led to a lack of physical indicators. The Fed's Beige Book showed weakening consumer spending and labor force, increasing the probability of interest rate cuts. Copper prices are expected to fluctuate temporarily [2] Aluminum, Alumina, and Aluminum Alloy - SHFE aluminum rebounded today, with spot aluminum in East China at par. In the off - season, the apparent consumption of aluminum was basically flat year - on - year. Aluminum ingot and aluminum rod social inventories decreased by 23,000 tons and 5,000 tons respectively compared to Monday. Since the National Day, inventory performance has been neutral. Macro sentiment is volatile, and SHFE aluminum will test the previous high resistance in the short term [3] - Cast aluminum alloy follows the fluctuation of SHFE aluminum. The Baotai spot price is 20,600 yuan. Scrap aluminum supply is tight, and the expected tax policy adjustment increases enterprise costs. However, the industry inventory is at a high level, and the SHFE warehouse receipts reach 43,000 tons. Whether the price difference with SHFE aluminum can continue to narrow remains to be seen [3] - Alumina's operating capacity is at a historical high, and industry inventory continues to rise. There is an obvious supply surplus, and the spot index in various regions continues to decline at a rate of about 10 yuan per day. The average cost in Shanxi and Henan in September was around 3,000 yuan. The current index price is not enough to trigger cash - loss production cuts in Shanxi and Henan but is approaching it. Alumina is mainly in a weak operation [3] Zinc - Although the spot export window has briefly opened, there has been no substantial large - scale export of zinc ingots. LME zinc inventory is at a low level of 38,000 tons, and the 0 - 3 month premium is at a high level of $139.83/ton. Overseas supply is tight, but terminal consumption has not improved significantly, and downstream acceptance of high - priced zinc is insufficient. LME zinc is expected to fluctuate at a high level [4] - Overseas smelter profits have recovered, and overseas zinc ingot supply may increase in the fourth quarter. The hidden inventory cannot be verified for the time being. Focus on tracking changes in LME zinc inventory. Some smelters in Gansu and Guangxi in China plan to conduct maintenance, and the room for further expansion of the domestic - foreign price difference is limited. The fundamentals are weak at home and strong abroad, and the export window is about to open. SHFE zinc is expected to consolidate at a low level, LME zinc will fluctuate at a high level, and the SHFE - LME ratio will fluctuate widely around the opening of the export window [4] Nickel and Stainless Steel - SHFE nickel is in a weak operation, and market trading is light. After the interest rate cut, the tendency of long - position holders to take profits is prominent. Sino - US frictions have increased uncertainty, and the macro - environment is gradually moving towards lower risk appetite [7] - The fundamentals of stainless steel are weak. During the traditional peak consumption season, downstream demand recovery is limited, market transactions are light, and social inventory has stopped falling and started to rise. The price of high - nickel ferro - nickel is 953 yuan per nickel point. Pure nickel inventory has increased by nearly 3,000 tons to 43,700 tons, nickel - iron inventory has increased by 600 tons to 29,200 tons, and stainless steel inventory has decreased by 3,400 tons to 909,000 tons. SHFE nickel's bullish factors are exhausted, and nickel prices are in a weak operation with a downward - biased center [7] Tin - SHFE tin fluctuated and closed up at the 280,000 - yuan level, and spot tin was reported at 281,200 yuan. The market has digested the Indonesian theme, and Indonesia's tin ingot exports rebounded to 484 tons in September. Hold short positions at high levels [8] Lithium Carbonate - The futures price of lithium carbonate rebounded, and market trading was light. Sino - US frictions have a short - term impact on market risk appetite. The overall inventory level of lithium carbonate is still high, and there may be a callback risk in the short term. The total market inventory decreased by 2,000 tons to 134,800 tons. Smelter inventory increased by 1,250 tons to 35,000 tons, downstream inventory decreased by 1,000 tons to 60,000 tons, and trader inventory decreased by 2,200 tons to 40,000 tons. Technically, lithium carbonate is in a weak operation, waiting for clarity [9] Industrial Silicon - The industrial silicon futures closed slightly higher and did not follow the strong linkage of coking coal. The spot price continued to be under pressure, and the price of the East China 553 specification decreased by 50 yuan/ton. The release of the复产 capacity in Xinjiang in September and the production increase of large enterprises have increased the risk of inventory accumulation. Large - scale production cuts are expected to start in the southwest at the end of October, and the cost side has strong support. The futures market is expected to remain volatile in the short term [10] Polysilicon - Polysilicon futures continued to rise, mainly driven by the expectation of photovoltaic capacity control policies. The fundamentals do not provide effective support for the time being, and the spot price remains stable. The output in October may continue to grow beyond expectations, and the risk of inventory accumulation under high inventory has increased. After the market, there were rumors about recent capacity policies, which still need to be clarified. The market may have a callback risk due to this, and it is recommended to strictly control positions [11]

Report Industry Investment Rating No relevant content provided. Core Viewpoints of the Report - The nickel price is expected to be under pressure and fluctuate mainly due to the resonance of macro - sentiment and refined nickel inventory build - up, along with potential uncertainties from Indonesian news [1]. - The stainless - steel price is likely to fluctuate weakly next week as macro and real - world factors exert pressure, and while cost restricts its elasticity, the cost marginally declines [2]. Summary by Relevant Catalogs Nickel Market Analysis - **Fundamentals**: Macro - sentiment and refined nickel inventory build - up put pressure on the nickel market. Trade war escalation and expected new pure - nickel production in the second half of the year increase supply, while alloy use of nickel - iron instead of nickel plates suppresses demand. Although non - standard nickel fundamentals improve marginally, the inventory build - up problem in refined nickel remains. Indonesian news may increase market concerns about nickel - ore supply governance, and the nickel - ore premium shows signs of stabilization and a slight increase [1]. - **Inventory**: China's refined nickel social inventory increased by 5,190 tons to 45,630 tons. LME nickel inventory increased by 7,254 tons to 237,378 tons [5]. Stainless - Steel Market Analysis - **Fundamentals**: The demand for stainless steel is suppressed by tariffs and weak post - real - estate cycle consumption. The overall apparent demand growth rate has converged. The trade - war resurgence may pressure long - term demand. Supply is expected to increase slightly, but actual production may fall short of expectations. The real - world fundamentals lack upward drivers due to significant holiday inventory build - up, high upstream inventory, and weak peak - season demand. Cost provides a bottom - support, but short - term nickel - iron price drops may lead to cost adjustments [2]. - **Inventory**: In September, SMM stainless - steel factory inventory was 1.532 million tons, with a year - on - year increase of 4% and a month - on - month decrease of 1%. Steel Union's stainless - steel social inventory was 1.054 million tons, with a week - on - week increase of 8% [5]. New Energy Market Inventory - On October 10, the inventory days of SMM nickel sulfate upstream, downstream, and integrated production lines changed by +1, - 1, and 0 months - on - month to 5, 9, and 7 days respectively. On September 26, the precursor inventory changed by - 0.6 months - on - month to 14.0 days. On October 9, the ternary material inventory changed by - 0.1 months - on - month to 7.1 days [5]. Market News - In September, due to violations of forestry license regulations, the Indonesian forestry working group took over part of the PT WedaBav Nickel mine. The Indonesian government also sanctioned 190 mining companies for non - payment of reclamation deposits. The Indonesian government requires companies to resubmit the 2026 RKAB budget online from October 1 to November 15 [6][7]. - Trump announced on October 10 that he may impose an additional 100% tariff on China starting from November 1 and implement export controls on "all key software" [7]. Futures Research Data - **Prices and Volumes**: The closing price of the Shanghai nickel main contract was 122,180, down 2,300; the closing price of the stainless - steel main contract was 12,780, down 80. The trading volume of the Shanghai nickel main contract was 159,070, an increase of 28,206; the trading volume of the stainless - steel main contract was 160,027, a decrease of 17,063 [9]. - **Industry Chain Data**: Data such as the price of 1 imported nickel, Russian nickel premium, nickel - bean premium, and various product price spreads and import profits are provided [9].

Report Industry Investment Ratings - Propylene, plastic: ☆☆☆ [1] - Pure benzene, styrene: ☆☆☆ [1] - PX, PTA: ☆☆☆ [1] - Ethylene glycol, short - fiber: ☆☆☆ [1] - Bottle chips, methanol: ☆☆☆ [1] - Urea, PVC: ☆☆☆ [1] - Caustic soda, soda ash: ☆☆☆ [1] - Glass: ☆☆☆ [1] Core Views - The overall chemical market shows a complex situation with different products having different supply - demand relationships, price trends, and influencing factors. Some products are facing supply pressure and weak demand, while others have certain support from demand but also face future uncertainties [2][3][5] Summary by Category Olefins - Polyolefins - Olefin futures' main contracts fluctuated narrowly. Supply is controllable as restarting devices are not in place, and downstream demand provides some price support [2] - Polyolefin futures' main contracts also fluctuated narrowly. Polyethylene maintenance decreased with increased domestic production, and downstream has pre - holiday stocking demand but faces post - holiday de - stocking pressure. Polypropylene prices are under pressure due to multiple factors such as demand differentiation, supply pressure, and high inventory [2] Pure Benzene - Styrene - Pure benzene oscillated downward. Although the current fundamental situation is okay with port inventory decreasing and spot price being relatively firm, high import volume and expected demand decline drag the market [3] - Styrene futures' main contracts fluctuated narrowly. Cost - end oil price provides support, but high inventory suppresses the price [3] Polyester - PX's strong expectation weakened, and PTA's profitability is still poor. Although the pre - holiday stocking in the polyester yarn industry has reduced inventory pressure, post - holiday demand is expected to weaken, and the supply - demand situation remains under pressure [5] - Ethylene glycol's domestic operation decreased slightly, and port inventory is low. However, new device trials and weakening demand may lead to a weak supply - demand situation in the fourth quarter [5] - Short - fiber's new capacity is limited, and inventory decreased. The pre - holiday stocking has fulfilled the positive expectation. Bottle chips showed a short - term strong trend due to typhoon - affected device shutdown, but long - term over - capacity is a pressure [5] Coal Chemical Industry - Methanol's main contract oscillated. Port inventory is expected to increase after the holiday, and the market is expected to be weak [6] - Urea prices increased slightly, but downstream follow - up is cautious. The domestic supply - demand situation is loose, and attention should be paid to policy adjustments [6] Chlor - Alkali - PVC oscillated weakly with high supply and high inventory. Domestic downstream pre - holiday stocking intention is low, and foreign demand is weak [7] - Caustic soda's futures price oscillated under the weak situation. Although there is an expectation of downstream stocking before alumina production, the current supply is high [7] Soda Ash - Glass - Soda ash weakened. The industry is de - stocking, and the downstream pre - holiday stocking is nearly over. The long - term supply is in excess [8] - Glass prices fell from a high level. Some manufacturers plan to increase prices, and attention should be paid to downstream restocking sentiment [8]

Report Summary Industry Investment Rating - Short - term, take a short - side allocation for soybeans and a bearish view on corn; for the long - term, wait for the bottom for corn, and there is no clear long - term rating for soybeans [8][12] Core View - National soybean production is expected to remain above 21 million tons, with a supply - demand imbalance leading to a likely price trend of high - opening and low - closing. Corn production is likely to increase, with a high - opening and low - closing price, and no major unilateral market is expected this year [8][12] Content Summary by Category 1. Soybean - **Planting and Yield**: Influenced by policies and subsidies, the planting area of domestic soybeans in Heilongjiang increased in 2025. Western regions maintained stable yields, while eastern regions had significant yield declines. Overall, the provincial yield was flat or slightly increased, and national production is expected to remain above 21 million tons [6] - **Cost and Subsidies**: The land rent cost of new - season domestic soybeans decreased, especially in the east. The comprehensive agricultural input cost was about 3,000 - 4,500 yuan/ha. Soybean subsidies were significantly higher than those for corn [7] - **Protein Content**: Due to the government's encouragement of high - oil soybean planting, the proportion of high - protein soybeans in Heilongjiang was about 40%, and the high - and low - protein differentiation was severe [7] - **Downstream Industry**: The downstream industry of domestic soybeans was not optimistic, with a supply - demand imbalance. Non - GMO soybean pressing enterprises faced challenges, and food and protein enterprises had stable processing and consumption but no growth in demand [8] - **Price Outlook**: The price of soybeans may open high and close low. When the rough grain price is below 1.75 - 1.8 yuan/jin, farmers may hold back sales. The short - term strategy is a short - side allocation [8] 2. Corn - **Planting and Yield**: Due to factors such as weather, subsidies, and economic benefits, the corn planting area in Heilongjiang decreased year - on - year, especially in the east. Most areas had increased yields, and the overall production was slightly higher than last year but lower than 2023 [11] - **Cost and Quality**: The land rent cost was the same as that of soybeans, and the agricultural input cost in the east was basically unchanged. The quality of new - season corn was better than last year, especially in terms of high bulk density [11] - **Price and Market**: The opening price of corn was high but trended down. The short - term market was bearish, and the long - term market needed to wait for the bottom. The market was likely to be volatile with a smaller amplitude than last year [12]

Core Insights - In August, profits of large-scale industrial enterprises in China showed a significant recovery, with a year-on-year increase of 20.4%, reversing a 1.5% decline in July [1] - From January to August, total profits reached 46,929.7 billion yuan, a year-on-year growth of 0.9%, ending a continuous decline since May [2] - The manufacturing sector's profit growth accelerated to 7.4%, while the electricity, heat, gas, and water supply industries saw a profit increase of 9.4% [1][4] Profit and Revenue Analysis - In August, the monthly profit was approximately 6,726.2 billion yuan, marking the second-highest point since the second quarter [2] - The revenue of large-scale industrial enterprises grew by 2.3% year-on-year from January to August, with August's revenue growth accelerating to 1.9% [2] - The profit margin for August was 5.83%, an increase of 0.90 percentage points year-on-year [2] Cost and Accounts Receivable - The cost situation improved in August, with costs per 100 yuan of revenue decreasing by 0.20 yuan, marking the first year-on-year decrease since July 2024 [2] - As of the end of August, accounts receivable reached 27.24 trillion yuan, a year-on-year increase of 6.6%, indicating a continued rise in absolute value [3] - The average collection period for accounts receivable extended to 70.1 days, slightly longer than the previous value [3] Sector Performance - The equipment manufacturing sector showed a profit increase of 7.2%, contributing 2.5 percentage points to the overall profit growth of large-scale industrial enterprises [4] - The consumer goods manufacturing sector turned from a decline of 2.2% to a growth of 1.4%, with significant profit growth in the beverage and agricultural sectors [4] - The raw materials manufacturing sector experienced a profit increase of 22.1%, driven by rising market demand and recovering prices [4] Enterprise Type Analysis - From January to August, profits of state-controlled enterprises saw a reduced decline, while private enterprises experienced a profit growth of 3.3%, surpassing the average growth of large-scale industrial enterprises [5] - The profit growth for state-owned enterprises rebounded significantly to 50%, while private enterprises and joint-stock companies also showed notable increases [6] - Medium and small enterprises reported profit growth of 2.7% and 1.5%, respectively, indicating a positive trend in smaller enterprise performance [6]

Group 1: Profit Data Overview - In August 2025, the total profit of industrial enterprises above designated size increased by 0.9% year-on-year, recovering from a previous decline of -1.7%[2] - The month-on-month profit growth in August was 15.20%, significantly higher than the five-year average of 4.87%[2] - Cumulative profit year-on-year turned positive for the first time in three months, reaching 20.4% in August[2] Group 2: Revenue and Cost Analysis - Revenue growth in August rose to 2.30%, with a notable decrease in cost per hundred yuan of revenue by 0.20 yuan, marking the first decline since July 2024[2] - The revenue profit margin increased to 17.53%, a significant rise from the previous year, contributing to the profit growth[2] - The actual inventory decreased faster than nominal inventory, with actual inventory down 5.2% year-on-year, compared to a nominal inventory increase of 2.3%[2] Group 3: Sector Performance - The profit growth rate for the midstream raw material manufacturing sector surged to 68.1%, an increase of 48.2 percentage points[2] - Downstream manufacturing profits rose by 22.7%, up 30.0 percentage points, while upstream raw material extraction saw a reduced decline of -23.4%, improving by 14.3 percentage points[2] - Public utility profits increased by 51.2%, a rise of 42.7 percentage points, driven by high electricity consumption levels[2] Group 4: Risks and Future Outlook - Future profit growth may face pressure in the fourth quarter, necessitating demand-side support[2] - Risks include potential policy measures falling short of expectations and uncertainties surrounding demand recovery[2]

Group 1: Profit and Revenue Insights - In August, industrial enterprises' profit increased significantly, with a year-on-year rise of 21.9% to 20.4%[4] - The profit margin improvement was primarily driven by a rise in operating profit margin, which increased by 20.2% to 17.5%[4] - Cumulative revenue for industrial enterprises showed a year-on-year growth of 2.3%, consistent with the previous value[6] Group 2: Cost and Inventory Analysis - The cost rate for industrial enterprises remained high at 85.6%, reflecting a year-on-year increase of 9.3% to -3.4% in profit contribution from costs[23] - Actual inventory growth slightly rebounded, with a year-on-year increase of 0.3% to 7.2%[46] - The accounts receivable ratio rose to 14.6%, indicating a prolonged collection period[30] Group 3: Sector Performance - The beverage and alcohol sector saw a dramatic profit increase of 234.8% to 226.8%, contributing 7.8% to overall industrial profit growth[15] - Chemical fiber and non-metallic products also experienced significant revenue growth, with increases of 22.2% and 7.4% respectively[41] - State-owned and joint-stock enterprises reported substantial profit growth, with increases of 53.1% and 30.9% respectively[44]

Report Summary 1. Report Industry Investment Rating No information provided in the report. 2. Core View of the Report - PVC开工率环比下降，下游开工率窄幅上升，但因下游消耗有限，社会库存持续增长且压力偏高 [3] - 电石价格上涨带动电石法成本环比上升，目前电石法、乙烯法工艺持续亏损 [3] - 短期暂无新增检修计划，受部分装置重启影响，本周PVC产能利用率预计环比上升；新产能投放在即，中长期加大行业供应压力 [3] - 临近国庆长假，国内部分下游已完成备货，PVC需求预计边际减弱；终端地产市场偏弱，持续拖累国内需求 [3] - 印度PVC反倾销政策预计即将落地，出口市场观望为主，社会库存压力偏高，后市难去化 [3] - 近期电石供需博弈，价格预计持稳整理；乙烯法成本预计变化不大；短期供需偏弱给V2601盘面压力，技术上关注4830附近支撑线支撑 [3] 3. Summary by Relevant Catalogs 3.1 Futures Market - 聚氯乙烯（PVC）收盘价为4919元/吨，环比上涨28元/吨；成交量为902670手，环比增加54062手；持仓量为1111748手，环比减少12387手 [3] - 期货前20名持仓中，买单量为864420手，环比增加19389手；卖单量为952064手，环比增加4665手；净买单量为 - 87644手，环比增加14724手 [3] 3.2 Spot Market - 华东地区乙烯法PVC价格为5000元/吨，环比下降10元/吨；电石法PVC价格为4746.92元/吨，环比下降38.85元/吨 [3] - 华南地区乙烯法PVC价格为4970元/吨，环比下降30元/吨；电石法PVC价格为4815元/吨，环比下降36.88元/吨 [3] - 中国PVC到岸价为700美元/吨，东南亚到岸价为650美元/吨，西北欧离岸价为710美元/吨，均无环比变化；基差为 - 179元/吨，环比下降28元/吨 [3] 3.3 Upstream Situation - 华中、华北、西北电石主流均价分别为2800元/吨、2768.33元/吨、2610元/吨，均无环比变化；内蒙液氯主流价为 - 350元/吨，无环比变化 [3] - VCM、EDC在CFR远东和CFR东南亚的中间价均无环比变化 [3] 3.4 Industry Situation - 聚氯乙烯（PVC）开工率为76.96%，环比下降2.98%；其中电石法开工率为76.89%，环比下降2.5%；乙烯法开工率为77.12%，环比下降4.19% [3] - 社会库存总计53.46万吨，环比增加0.3万吨；华东地区总计48.21万吨，环比增加0.38万吨；华南地区总计5.25万吨，环比减少0.08万吨 [3] 3.5 Downstream Situation - 国房景气指数为93.05，环比下降0.29；房屋新开工面积累计值为39801.01万平方米，环比增加4595.01万平方米；房地产施工面积累计值为643108.94万平方米，环比增加4377.94万平方米；房地产开发投资完成额累计值为31693.94亿元，环比增加3588.01亿元 [3] 3.6 Option Market - 20日历史波动率为9.49%，环比下降0.32%；40日历史波动率为11.22%，环比上升0.16% [3] - 平值看跌期权隐含波动率和平值看涨期权隐含波动率均为14.21%，环比上升0.55% [3] 3.7 Industry News - 9月13 - 19日，PVC产能利用率环比下降2.98%至76.96%；下游开工率环比上升1.69%至49.19%，其中管材开工率环比上升1.52%至39.13%，型材开工率环比上升0.21%至39.43% [3] - 截至9月18日，PVC社会库存在95.37万吨，环比上周上升2.03% [3] - 9月13 - 19日，电石法周度平均成本环比上升至5230元/吨，乙烯法周度平均成本上升至5631元/吨；电石法周度利润环比下降155元/吨至657元/吨，乙烯法周度利润环比上升20元/吨至 - 652元/吨 [3]

Core Viewpoint - The article clarifies the distinction between "cost" and "expense" in a business context, emphasizing that costs are directly related to the production of goods or services, while expenses are necessary for maintaining overall business operations [6][8]. Group 1: Definition of Cost and Expense - "Cost" refers to direct expenditures associated with producing a product, such as raw materials, labor, and equipment used in production [4]. - "Expense" encompasses the operational costs required to run a business, including advertising, salaries of sales personnel, and other overheads that are not directly tied to the production of a specific product [5][6]. Group 2: Tax Regulations - According to the "Implementation Regulations of the Corporate Income Tax Law of the People's Republic of China," costs include sales costs, goods costs, and business expenditures incurred during production activities [8]. - The same regulations define expenses as those incurred in sales, management, and finance, excluding any costs already included in the cost calculations [8]. Group 3: Future Learning Opportunities - The article indicates that future content will cover more about tax deductions, including distinctions between revenue-related and capital-related expenditures [9].