On January 4, alumina enterprises in Xiaoyi, Shanxi, reduced the procurement price of liquid caustic soda for January 2026 by 100 yuan. The delivered price of 50% ion-exchange membrane caustic soda (on a 100% basis) for chlor-alkali enterprises in Shanxi, Shaanxi, and Inner Mongolia was 2,440 yuan/ton. PriceSeek analysis of caustic soda, long-short score: -1.5. The article reports that alumina enterprises in Xiaoyi, Shanxi, lowered the procurement price of liquid caustic soda for January 2026 by 100 yuan/ton, with the 50% ion-exchange membrane caustic soda price (on a 100% basis) reaching 2,440 yuan/ton, covering regions such as Shanxi, Shaanxi, and Inner Mongolia. This indicates weak demand or oversupply in the caustic soda market, posing significant downward pressure on spot prices and potentially triggering a chain reaction of price reductions. Combined with data from the Zhengzhou Commodity Exchange caustic soda futures, the main contract 2603 settlement price was 2,170 yuan/ton (as of January 5, 2026), down 80 yuan, with high trading volume and changes in open interest reflecting strong bearish sentiment in the market. This news will further intensify downward pressure on futures prices, resulting in a score of -1.5, representing a moderate to significant bearish impact.