SHANGHAI, Mar. 14 (SMM) – Shanghai spot copper premiums were quoted between RMB 0-100/mt in the morning business. Traded prices for standard-quality copper were between RMB 56,500-56,550/mt, and RMB 56,550-56,620/mt for high-quality copper. SHFE copper prices trended down after opening lower, but spot copper cargo-holders insisted on firm prices ahead of delivery for SHFE 1303 copper contract. A small number of speculators chose to enter markets at lower price levels, but traders preferred to stand on the sidelines after copper prices rallied. Downstream producers continued purchasing to need, so overall market transactions remained limited.