Madrid share prices soared 5.77 percent in opening trade Monday after the eurozone agreed to throw a lifeline to Spanish banks of up to 100 billion euros ($125 billion). After six minutes\' trade the IBEX-35 index of leading companies soared 377.9 points, or 5.77 percent, to 6,929.9 while borrowing costs as measured by rates on benchmark 10-year Spanish government bonds fell sharply, reflecting increased investor confidence.