European stock indices flag on Tuesday amid concern about an escalation of the Greek debt crisis as investors look to U.S. retail sales figures for direction. Alcatel-Lucent surges in Paris, while Nokia slumps in Helsinki on news of advanced talks to create a telecom-equipment maker worth more than $40 billion. In London discounter Poundland rises on a sneak preview of full-year figures which showed that revenue surpassed the critical £1 billion ($1.5 billion) mark. But hospitals group Spire Healthcare slumps as Cinven Ltd. sells more than a fifth of its holding in a secondary offering priced at a generous discount to Monday’s close.