单位：美元/吨  
    LME期货场外最新价                 LME现货/三个月升贴水
    铜 7755.0/7795.0                  98.0/97.0     b
    铝 2560.0/2570.0                  -43.0/-46.0   c
    铅 1079.0/1080.0                  -20.0/        c
    锌 3500.0/3505.0                  20.0 /18.0    c
    锡 8725.0/8750.0                  -45.0/-45.0   b
    镍 24600/24700                    2200.0/1800.0 b 
    c表示升水(到期日价格小于三个月价格)，b表示贴水(到期日价格大于三个月价格)