Unit: dollars/ ton
-----------------------------------------
    LME Out Price   LME Spot Price/b/c in 3-month
Copper  5030.0/5040.0        -15       c
Aluminium  1636.0/1646.0        -31       c
Lead  1704.0/1714.0        -19       c
Zinc  1564.0/1574.0        -27       c
Tin 14400.0/14350.0        70       b
Nickel 16425.0/16525.0       -75       c
-----------------------------------------
c for contango£¬b for backwardation