As of January 29, 2026, the inventory of fixed liquid caustic soda samples from enterprises with a capacity of 200,000 tons or more nationwide reached 520,300 tons (wet ton), marking a month-on-month increase of 2.11% and a year-on-year rise of 13.66%. PriceSeek's analysis of caustic soda indicates a bearish sentiment with a score of -1.5. By January 29, 2026, caustic soda inventory increased by 2.11% month-on-month to 520,300 tons, representing a 13.66% year-on-year growth. This suggests intensified supply pressure, which may suppress spot demand and lead to a decline in prices. In the futures market, the main caustic soda contract 2605 closed at 2,214 yuan per ton, down by 11 yuan, with open interest increasing by 4,038 contracts. This reflects heightened selling pressure in the market, and it is anticipated that futures prices will continue their downward trend.