Spanish share prices plunged 3.06 percent in early trade Tuesday, dragged down by banks and major industrial companies. The Madrid stock exchange's IBEX-35 index tumbled 255.9 points to 8,097.9. Banco Santander slid 4.46 percent, builder Sacyr Vallehermoso plunged 6.11 percent and wind turbine group Gamesa dropped 5.32 percent.