SHANGHAI, Aug. 3 (SMM) –SHFE 1509 tin opened at RMB 110,550/mt on Monday. Plunging Chinese stock market and disappointing China manufacturing PMI for July prompted investors to cut bullish bets, dragging the contract down. Finally, it ended down RMB 1,240/mt or 1.13% at 108,720/mt. Trading volumes were up 410 lots to 1,688 lots, and positions were down 54 lots to 1,906 lots. The contract should look for support at RMB 107,000/mt tonight.