SHANGHAI, Jun. 19 (SMM) – Spot copper premium quotes were between positive RMB 250-320/mt in Shanghai in the morning business. Traded prices for standard-quality copper were between RMB 55,830-55,870/mt, and RMB 55,850-55,950/mt for high-quality copper. SHFE copper prices fluctuated in a narrow band. As some traders in spot markets bought copper in large quantities, cargo-holders held prices firm and helped copper premiums rise all the way. Downstream producers still sourced to order. Overall spot copper market activity, though, kept active in the morning. However, as copper premiums increased near the midday, purchases at prices near RMB 56,000/mt slowed noticeably, turning market participants cautious again.