SHANGHAI, Oct. 20 (SMM) – Tin prices in Shanghai spot market followed LME tin down in the week ending October 17. The average price fell from RMB 138,500/mt to RMB 136,750/mt. Mainstream traded prices dropped to RMB 135,000-137,500/mt last Friday. Consumption was sluggish during the first half of the week. Some downstream producers entered the market last Thursday, attracted by low prices. 15-day production halts at Yunnan Tin Group for maintenance did help prevent prices from falling dramatically, though. Large smelters held offers between RMB 137,500-138,000/mt last Friday.