Report Industry Investment Rating No information provided in the report. Core Viewpoints of the Report - The current core contradiction in the market remains the pattern of "high supply, high inventory, and weak demand." The fundamental driving force is limited, and the short - term trend of the futures market is weak, expected to maintain a volatile operation. Follow - up attention should be paid to macro - sentiment changes and industry capacity adjustment [9][40]. - In terms of operation, it is recommended to wait and see for single - side trading as there are no obvious trend opportunities; no arbitrage opportunities are available; for options, consider selling the wide - straddle strategy opportunistically to collect time value [40]. Summary by Relevant Catalogs 1. Market Review - Last week, the price of the main contract SA2601 of soda ash fluctuated within the range of 1,283 - 1,352 yuan/ton. As of the afternoon close on September 19, 2025, the main contract SA2601 of soda ash futures rose by 28 yuan/ton, a weekly increase of 2.17%, closing at 1,318 yuan/ton [6]. 2. Soda Ash Supply and Demand Situation 2.1 Production and Capacity Analysis - As of September 18, 2025, the weekly domestic soda ash production was 745,700 tons, a month - on - month decrease of 15,400 tons, a decline of 2.02%. Light soda ash production was 328,000 tons, a month - on - month decrease of 11,400 tons; heavy soda ash production was 417,700 tons, a month - on - month decrease of 4,000 tons. Individual enterprise shutdowns for maintenance and equipment problems led to the supply decline [10]. - Last week, the comprehensive capacity utilization rate of soda ash was 85.53%, a month - on - month decline of 1.76%. Among them, the ammonia - soda process capacity utilization rate was 88.87%, a month - on - month decline of 1.97%; the co - production process capacity utilization rate was 75.53%, a month - on - month decline of 1.86%. The overall capacity utilization rate of 15 enterprises with an annual production capacity of one million tons or more was 87.27%, a month - on - month decline of 1.03% [12]. 2.2 Soda Ash Inventory Analysis - As of September 18, 2025, the total inventory of domestic soda ash manufacturers was 1,755,600 tons, an increase of 8,500 tons from the previous Monday, a growth rate of 0.49%. Among them, light soda ash inventory was 749,500 tons, a month - on - month increase of 3,200 tons; heavy soda ash inventory was 1,006,100 tons, a month - on - month increase of 5,300 tons. Compared with the previous Thursday, it decreased by 41,900 tons, a decline of 2.33%. The inventory last year was 1,398,800 tons, a year - on - year increase of 356,800 tons, a growth rate of 25.51% [14]. 2.3 Shipment Situation Analysis - On September 18, it was reported that the weekly shipment volume of Chinese soda ash enterprises was 787,600 tons, a month - on - month increase of 0.25%; the overall soda ash shipment rate was 105.62%, a month - on - month increase of 2.39 percentage points. The weekly soda ash supply decreased slightly, and the shipments of individual enterprises were good, with the overall production - sales rate slightly easing [17]. 2.4 Profit Analysis - On September 18, 2025, the theoretical profit of the ammonia - soda process for soda ash in China was - 36.75 yuan/ton, a month - on - month decline of 0.45 yuan/ton. During the week, the price of raw salt on the cost side remained stable, the price of coke increased slightly, and the cost side increased; the price of soda ash remained stable, so the profit of the ammonia - soda process fluctuated downward [20]. - As of September 18, 2025, the theoretical profit (double - ton) of the co - production process for soda ash in China was - 70.50 yuan/ton, a month - on - month decline of 16 yuan/ton. During the week, the price of raw salt remained stable, the price of coal increased, the cost side strengthened; the price of soda ash fluctuated steadily, and the by - product ammonium chloride decreased slightly, so the double - ton profit of the co - production process declined [24]. 3. Downstream Industry Situation 3.1 Float Glass Industry - As of September 18, 2025, the daily output of national float glass was 160,200 tons, the same as on the 11th. The weekly output of national float glass from September 12 - 18, 2025 was 1,121,200 tons, the same as the previous week, a year - on - year decrease of 4.04% [28]. - As of September 18, 2025, the total inventory of national float glass sample enterprises was 60,908,000 weight cases, a month - on - month decrease of 675,000 weight cases, a month - on - month decrease of 1.10%, a year - on - year decrease of 18.56%. The inventory days were 26 days, a decrease of 0.3 days from the previous period [29]. 4. Spot Market Situation - The price of 5500 - calorie steam coal increased by 10 yuan/ton, a growth rate of 1.46%; the price of well - mine salt in the East China region remained unchanged; the price of light soda ash in the Central China region increased by 20 yuan/ton, a growth rate of 1.77%; the price of float glass in China increased by 2 yuan/ton, a growth rate of 0.17%; the price of ammonium chloride (dry ammonium) in Henan decreased by 20 yuan/ton, a decline of 5%; the price of synthetic ammonia in Jiangsu decreased by 62 yuan/ton, a decline of 2.79% [37][39]. 5. Comprehensive Analysis - Last week, the soda ash market showed an overall volatile pattern. The supply - side pressure still exists. Although there may be fluctuations in individual devices during the week, the overall industry operating rate remains relatively high, and the production pressure has not been fundamentally alleviated. The demand side is weak, with downstream glass and photovoltaic industries purchasing on a just - in - time basis, limited new order increments, and strong market wait - and - see sentiment. Although the enterprise inventory has decreased compared with the previous week, the absolute level is still at a historically high level, reflecting the weak terminal demand. The profit situation is not optimistic, with both the ammonia - soda process and the co - production process continuing to operate at a loss, and the cost support is limited [40].