LME 3-month futures LME Spot/3-month premiums and discountsCopper 7374/7375 c 22/18 cTin 21300/21305 b 45/95 bLead 2133/2135 c 28/24 cZinc 2132/2132.5 c 30/26 cAluminium 2134.5/2135 c 8/4 cNickel 21950/21975 c 91/41 c