东京工业品交易所白银期货主力合约收报58.8日圆/克，较上一交易日下跌0.1日圆/克。     
以下是TOCOM 7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   58.1    -       -       -       -       0       -                       
17/10月   58      -       -       -       -       0       -                       
17/12月   57.3    -       -       -       -       0       -                       
18/02月   58      58.7    58.7    58.7    58.7    0.7     1                       
18/04月   58.6    58.6    58.9    58.3    58.5    -0.1    17                      
18/06月   58.9    58.8    59.1    58      58.8    -0.1    53                      
合计                                                      71                      
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。