SHANGHAI, Aug. 20 (SMM) –SHFE 1509 tin hovered around RMB 109,680/mt for most of the day on Thursday. Finally, the contract ended down RMB 340/mt or 0.32% at RMB 106,940/mt. Trading volumes were down 184 lots to 576 lots, and positions were down 84 lots to 1,280 lots. Trading was thin as there is little room for arbitrage between spot and futures market. SHFE 1509 tin should test support at RMB 106,300/mt tonight.