SHANGHAI, Mar. 25 (SMM) – Spot copper premiums were RMB 20-100/mt in Shanghai on Monday. Traded prices for standard-quality copper were between RMB 56,080-56,180/mt, and RMB 56,100-56,280/mt for high-quality copper. Prices for the most active SHFE copper contracts marched down after a high opening, stimulating cargo holders to sell for cash at high prices. Spot copper premiums fell, especially that of high-quality copper, leaving no arbitrage opportunities for middlemen. Downstream producers purchased only a small amount of goods against stagnant copper prices. Wait-and-see sentiment dominated the market.