GM, APRIL 12,7.20 AM; CRUDE$85.51(UP0.59%),NAT GAS $4.11(UP1.11%),GOLD$1165(UP$3(,SILVER$18.53(UP1%)///COPPER OPENS GAP UP AROUND 1.3% IN EARLY TRADES/USD WEAKENS A BIT//TALK OF CHINESE YUAN REVALAUTION BOOSTS METALS//BHP BILTON NICKEL PLANT CLOSES PART OPERATIONS DUE DEATH OF WORKER.