On January 13, Yangzhou Shiyou's 320,000-ton/year phenol-acetone plant operated normally, with the price increased by 150 to 4,450 yuan/ton. Contract shipments proceeded as planned, and inventory remained low. **PriceSeek Analysis** **Acetone** Bull-Bear Score: 1.5 Yangzhou Shiyou raised the acetone price by 150 yuan/ton to 4,450 yuan/ton. Low inventory and normal plant operations indicate tight supply in the spot market, with stable and improving demand, providing strong support for acetone spot prices. Positive factors are significant. **MIBK** Bull-Bear Score: 1 As acetone is a primary raw material for MIBK, its price increase will raise MIBK production costs, indirectly exerting upward pressure on MIBK spot prices. However, the current market does not directly mention changes in MIBK supply and demand, so the impact is moderate.