Report Summary 1. Report Information - Research Variety: Caustic Soda [1] - Report Cycle: Daily [1] - Date: August 28, 2025 [1] 2. Market Conditions 2.1 Futures Market - **Contract Quotes**: The main caustic soda contract, Caustic Soda 2601, fluctuated on August 28, 2025, closing at 2,692 yuan/ton, down 10 yuan/ton or 0.37% from the previous settlement price. Trading volume decreased by 63,000 lots to 366,000 lots, and open interest decreased by 7,343 lots to 113,000 lots [2]. - **Variety Prices**: Among the 12 caustic soda futures contracts, only the Caustic Soda 2607 contract rose slightly by 0.18%, while the rest declined. The total open interest of the variety was 261,700 lots, a decrease of 12,871 lots from the previous trading day. The open interest of the active contract, Caustic Soda 2601, decreased by 7,343 lots, with 98.92 million yuan of funds flowing out [5]. - **Related Quotes**: The put options of the main caustic soda contract SH601 performed better than the call options today, with relatively low overall trading volume [7]. 2.2 Spot Market - In Shandong, the prices of 32% caustic soda remained mostly stable, with some companies with low inventories and good sales slightly increasing prices. The mainstream transaction prices of 32% ion - membrane caustic soda were 870 - 930 yuan/ton in southwestern Shandong, 840 - 890 yuan/ton in central and eastern Shandong, and 880 - 900 yuan/ton in northern Shandong. The mainstream transaction price of 50% ion - membrane caustic soda in central and eastern Shandong was 1,340 - 1,380 yuan/ton [8][9]. 3. Influencing Factors 3.1 Industry News - As of August 28, 2025, the factory inventory of fixed liquid caustic soda sample enterprises with a capacity of 200,000 tons and above was 379,600 wet tons, a 4.25% decrease from the previous period and a 28.84% increase year - on - year. The capacity utilization ratio of the national liquid caustic soda sample enterprises this week was 21.73%, a 0.65% decrease from the previous period. The capacity utilization ratios in the northwest, north, and southwest regions increased, while those in the central, eastern, southern, and northeastern regions decreased [10][11]. 3.2 Technical Analysis - The main caustic soda SH601 contract closed with a small negative line today, supported by the 10 - day moving average below [12]. 4. Market Outlook - Today, the main caustic soda futures contract, Caustic Soda 2601, continued to fluctuate weakly, while the spot price remained stable. This week, the inventory of sample enterprises continued to decline, with a 4.25% decrease from the previous period. Orders outside Shandong will be suspended due to a major event on September 3, and non - aluminum downstream industries are resisting high - priced goods, resulting in slower overall sales. In the eastern region, supply is tight due to equipment maintenance, which supports prices. Future price trends will depend on inventory changes and downstream procurement rhythms [14].