SHANGHAI, Dec 30 (SMM) - The social inventory of silicon metal across Huangpu port, Kunming city and Tianjin port remained stable at 121,000 mt as of December 30. The shipment flow at Huangpu port and Tianjin port was still active this week. The inventory of Huangpu port decreased slightly as some goods have not yet arrived at the warehouses. The inventory of Tianjin port increased slightly as the arrivals were considerable. The shipment flow in Kunming was not active and the inventory remained stable. Amid the approaching Chinese New Year, the transactions in the spot market may continue to weaken due to the insufficient transportation capacity.