Volvo Car Corp. has chosen WPP's Grey, London, as global creative agency. The duties start in January. The account is currently with Havas-owned Arnold. The change involves the U.S. as well, meaning Arnold's Boston office will lose Volvo's $50 million creative business here, per Tomas Caetano, Volvo vice president of brand marketing. Grey won a six-month global creative review. The four finalists offered campaigns for the 2014 launch of the new XC90 crossover vehicle.