On January 16, the polyester staple fiber market in Jiangsu region was concentrated at 6450-6530 self-pickup. The cost side was weak, downstream purchases of raw materials were cautious, and market transactions were sluggish. PriceSeek analyzed polyester staple fiber, with a long-short score of -1.5. The article indicates that spot prices of polyester staple fiber in Jiangsu region are concentrated at 6450-6530 yuan/ton self-pickup. The weak cost side suggests that upstream raw materials such as PTA prices have declined, weakening cost support. Downstream cautious procurement reflects weak terminal demand, and sluggish market transactions further highlight the supply-demand imbalance, exerting significant downward pressure on spot prices. In terms of futures, based on yesterday's data, the main contract for polyester staple fiber, such as 2603, settled at 6454 yuan/ton, down 62 yuan, with open interest decreasing by 6,400 lots, indicating increased bearish sentiment in the market. The current insufficient spot demand and weak cost side may persist, and it is expected that futures prices will continue to face downward pressure and adjust, with significant short-term downside risks.