10/08/2011 | World
US stocks tumbled more than 4 percent, almost wiping out gains from a relief rally the previous day, as rumours about the health of French banks sparked concern that the euro zone's debt crisis could claim new victims. European shares ended sharply down, led by financials, with Société Générale down more than 22 percent at one point on rumours about the French bank's financial solidity, all of which it denied.