东京工业品交易所白银期货主力合约收报59.3日圆/克，较上一交易日下跌0.4日圆/克。     
以下是TOCOM 8月21日白银期货行情:                                                  
合约      昨收    开盘    最高    最低    收盘    涨跌   成交量                   
17/08月   59.9    59.9    59.9    59.6    59.6    -0.3    3                       
17/10月   58.9    59.2    59.2    59.2    59.2    0.3     1                       
17/12月   59.1    -       -       -       -       0       -                       
18/02月   58.8    58.9    58.9    58.9    58.9    0.1     1                       
18/04月   59.3    59.9    60      59.2    59.2    -0.1    6                       
18/06月   59.7    60.2    60.2    59.1    59.3    -0.4    30                      
合计                                                      41                      
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。