- The report utilizes a methodology from the industry rotation series to track the configuration signals and business indicators of various industries, including coal, livestock farming, steel, structural materials, and fuel refining industries [9] Quantitative Models and Construction Methods Coal Industry Model - **Model Name**: Coal Industry Profit and Revenue Growth Estimation Model - **Model Construction Idea**: The model estimates monthly revenue and profit growth of the coal industry based on the changes in price and production capacity factors [10] - **Model Construction Process**: - The long-term contract mechanism for thermal coal determines the sales price for the next month based on the price index of the last month - Monthly revenue and profit growth are estimated using the year-on-year changes in price factors and production capacity factors [10] - **Model Evaluation**: The model predicts that the coal industry profit for October 2025 will continue to decline year-on-year due to coal prices being lower than the same period last year [14] Livestock Farming Model - **Model Name**: Livestock Supply and Demand Gap Estimation Model - **Model Construction Idea**: The model uses the relationship between the number of breeding sows and the quarterly pig slaughter rate to estimate the supply-demand gap for pigs six months later [15] - **Model Construction Process**: - The model assumes a stable proportional relationship between quarterly pig slaughter and the number of breeding sows six months prior - Formula: $ \text{Slaughter Coefficient} = \frac{\text{Quarterly Pig Slaughter}}{\text{Breeding Sow Inventory (lagged 6 months)}} $ [15] - Potential production capacity after 6 months is calculated as: $ \text{Potential Production Capacity (6 months later)} = \text{Breeding Sow Inventory (current month)} \times \text{Slaughter Coefficient (6 months prior)} $ [16] - Potential demand after 6 months is calculated as: $ \text{Potential Demand (6 months later)} = \text{Quarterly Pig Slaughter (6 months prior)} $ [16] - **Model Evaluation**: Historical experience shows that the slaughter coefficient method effectively identifies pig price upward cycles [16] Steel Industry Model - **Model Name**: Steel Industry Profit and Unit Profit Estimation Model - **Model Construction Idea**: The model predicts monthly profit growth and calculates unit profit for the steel industry by considering comprehensive steel prices and cost indicators such as iron ore, coke, pulverized coal, and scrap steel [18] - **Model Construction Process**: - Comprehensive steel prices and cost indicators are used to predict monthly profit growth - Unit profit is calculated based on the difference between steel prices and costs [18] - **Model Evaluation**: The model predicts that the steel industry profit for September 2025 will grow year-on-year, but the PMI rolling 12-month average remains flat, maintaining a neutral configuration viewpoint [23] Structural Materials and Building Engineering Model - **Model Name**: Glass and Cement Industry Profit Tracking Model - **Model Construction Idea**: The model tracks profitability changes in the glass and cement manufacturing industries using price and cost indicators, and designs configuration signals based on profitability changes [25] - **Model Construction Process**: - Price and cost indicators are used to track profitability changes - Configuration signals are designed based on profitability changes [25] - **Model Evaluation**: - Glass industry profit turned positive year-on-year in September 2025, leading to an upgrade to a positive configuration signal [30] - Cement industry profit remained flat year-on-year, and no positive signals were observed in new housing starts, maintaining a neutral configuration viewpoint [30] Fuel Refining and Oil Services Model - **Model Name**: Fuel Refining and Oil Services Profit and Configuration Signal Model - **Model Construction Idea**: The model estimates industry profit growth and cracking spreads based on changes in refined fuel prices and crude oil prices, and designs configuration signals based on oil prices, cracking spreads, and new drilling changes [31] - **Model Construction Process**: - Refined fuel price changes and crude oil price changes are used to estimate industry profit growth and cracking spreads - Configuration signals are designed based on oil prices, cracking spreads, and new drilling changes [31] - **Model Evaluation**: - The model predicts that the fuel refining industry profit for September 2025 will grow year-on-year due to lower inventory costs from recent low oil prices [31] - Observations show that oil prices in September 2025 were lower than the same period last year, maintaining a neutral configuration viewpoint for the fuel refining and oil services industries [37][38] Model Backtesting Results Coal Industry Model - **Profit Growth**: Predicted to continue declining year-on-year in October 2025 due to lower coal prices compared to the same period last year [14] Livestock Farming Model - **Breeding Sow Inventory**: 4,038 million heads as of August 2025, slightly decreased month-on-month [17] - **Potential Production Capacity (26Q1)**: 19,361 million heads [17] - **Potential Demand (26Q1)**: 19,476 million heads [17] - **Supply-Demand Balance**: Slightly tight [17] Steel Industry Model - **Profit Growth**: Predicted to grow year-on-year in September 2025 [23] - **PMI Rolling Average**: Remained flat for 12 months, not exceeding the threshold [23] Structural Materials and Building Engineering Model - **Glass Industry Profitability**: Turned positive year-on-year in September 2025 [30] - **Cement Industry Profitability**: Remained flat year-on-year in September 2025 [30] - **Manufacturing PMI Rolling Average**: Remained flat for 12 months [30] - **Housing Sales Area**: Observed a year-on-year decline in August 2025 [30] Fuel Refining and Oil Services Model - **Fuel Refining Industry Profitability**: Predicted to grow year-on-year in September 2025 due to lower inventory costs [31] - **Oil Price**: Observed to be lower than the same period last year in September 2025 [37] - **New Drilling Activity**: No significant year-on-year changes observed in the US [38]