SHANGHAI, Aug. 24 (SMM) –Spot copper offers were quoted between premiums of positive RMB 80-150/mt today. Trade prices for standard-quality copper were between RMB 66,750-66,800/mt in the morning business, and RMB 66,800-66,900/mt for high-quality copper. SHFE copper prices failed to rebound, and market supply was sufficient. However, buying interest was still low, forcing copper premiums to fall. Market transactions were hampered at near RMB 67,000/mt.