SHANGHAI, Dec. 21 (SMM) – The most active tin contract on the SHFE has shifted to 1605 contract. The contract opened at RMB 96,730/mt on Monday, and drifted higher to end the day up RMB 2,770/mt or 2.92% at RMB 97,600/mt. Trading volumes were up 3,074 lots to 6,526 lots, and positions were up 926 to 3,672.