SHANGHAI, Apr. 18 (SMM) – Traded prices of spot aluminum in Shanghai were between RMB 15,960-15,990/mt on Wednesday, with discount of RMB 20/mt to premiums of RMB 10/mt over the SHFE current-month aluminum price. Low-iron aluminum was traded between RMB 16,040-16,080/mt in Shanghai. Traded prices of spot aluminum in Wuxi were between RMB 15,980-16,000/mt. The SHFE current-month aluminum price edged up moderately but failed to touch the RMB 16,000/mt mark, constraining increases in spot aluminum price. As buyers and sellers refused to budge on prices, transactions did not improve.