[SMM Analysis: North China's electrolytic copper spot market is quiet in March, spot premiums are expected to bottom out and rebound in the second quarter] According to SMM data, the average spot premium for SMM 1# electrolytic copper in North China in March was a discount of 323 yuan/ton, a decrease of 76 yuan/ton from the previous month. Due to the continuous weakness in consumption, the spot premiums in March fell to a yearly low...