Europe stocks choppy; oils, Logica rise By: MarketWatch May 31, 2012 at 04:15 AM EDT European stock markets remain volatile after the prior session’s sharp losses on Thursday, with oil firms and Logica moving higher. Read More >> Related Stocks: HSBC Holdings Plc ADR Lloyds Banking Group Plc ADR Royal Dutch Shell Cl B ADR Royal Dutch Shell Plc ADR Telefonica S.A. ADR