SHANGHAI, Jan 13 (SMM) -As of January 13, bonded zone inventory of nickel dropped to 8,300 mt, with the inventory of nickel briquettes and nickel plates of 1,470 mt and 6,830 mt respectively. The import window has been closed for two months. LME nickel prices dropped this week, pushing up the SHFE/LME nickel price ratio. The spot imports could gain profits. According to SMM research, some imported pure nickel has been cleared and shipped to the Chinese market.