东京工业品交易所铂金期货主力合约收报3,430日圆/克，较上一交易日上涨37日圆/克。    
以下是TOCOM 4月21日铂金期货行情:                                                 
合约      昨收    开盘    最高    最低    收盘    涨跌  成交量                   
17/04月   3,405   3,413   3,450   3,413   3,433   28    19                       
17/06月   3,406   3,438   3,448   3,432   3,434   28    130                      
17/08月   3,403   3,410   3,443   3,410   3,430   27    47                       
17/10月   3,399   3,408   3,442   3,407   3,431   32    58                       
17/12月   3,393   3,402   3,441   3,401   3,430   37    647                      
18/02月   3,393   3,400   3,445   3,399   3,430   37    8,684                    
合计                                                      9,585                  
注:1.单位:日圆/克；成交量单位:手。                                               
2.最小价格变动单位日圆/克。