Gone are the days of siloed marketing channels – and as the explosion of mobile technology is already priving, so too has the autonomy of the marketing industry. Today, the power quite literally sits in the hands of the consumer. And how is the financial industry dealing with this ‘anytime, anywhere’ mantra? Nick Pryke spoke with Nathaniel Halsey, Senior Vice President for Digital Services Marketing & Infrastructure at CitiGroup to find out – starting with how they’re looking to empower the brand.