东京工业品交易所铂金期货主力合约收报3,400日圆/克，较上一交易日下跌24日圆/克。    
以下是TOCOM 9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                   
17/10月   3,444   3,437   3,437   3,406   3,421   -23     139                    
17/12月   3,427   3,421   3,431   3,394   3,409   -18     120                    
18/02月   3,428   3,423   3,424   3,400   3,406   -22     132                    
18/04月   3,423   3,415   3,421   3,383   3,402   -21     201                    
18/06月   3,421   3,417   3,419   3,377   3,399   -22     2,241                  
18/08月   3,424   3,419   3,423   3,376   3,400   -24     8,745                  
合计                                                      11,578                 
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。