Baystreet Staff - Tuesday, May 19, 2015 Vodafone Group (VOD) slides on flat revenue Vodafone Group Plc (ADR) (NASDAQ: VOD) shares dropped 4.3% to $34.95. Vodafone's organic service revenue rose 0.1% in the fourth quarter. Share volume was 3.42 million, nosing out an all-day average of 3.40 million