SHANGHAI, Oct. 25 (SMM) –Shanghai spot copper offers were quoted between premiums of positive RMB 150-250/mt before 11:00 am today. Traded prices for standard-quality copper were between RMB 56,400-56,800/mt before 11:00 am, and RMB 56,500-56,900/mt for high-quality copper. SHFE copper prices followed LME copper prices to surge significantly after 11:00 am, nearly rising by their daily limit. Market suppliers and buyers generally stood on the sidelines due to acute volatile price changes. Some speculators believed SHFE copper prices would increase again the next day, and offered premiums of positive RMB 0/mt, but transaction volumes were extremely limited. Traded prices were reported between RMB 57,000 -58,000/mt range, but with no market transaction at all.