东京工业品交易所白银期货主力合约收报52.3日圆/克，较上一交易日下跌0.1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                
18/08月   51.3    -       -       -       -       0       -                    
18/10月   50.8    -       -       -       -       0       -                    
18/12月   51.6    52.6    52.7    52.1    52.1    0.5     4                    
19/02月   52.1    52.3    52.3    52.3    52.3    0.2     3                    
19/04月   52.5    52.5    52.5    52      52      -0.5    15                   
19/06月   52.4    52.5    53      52.1    52.3    -0.1    13                   
合计                                                      35                   
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。