Traditionally, Banks have feared Cloud, partly due to regulatory reasons, partly due to data security and other reasons. However, as some pioneering banks around the world have shown, there is a way. And as are increasingly discovering, Cloud will not be an option, but an imperative for Banks. What's driving this? For starters, the changing systems of engagement with customers. Yes, as banking customers, particularly, retail banking customers, start demanding that their banks are available to them 24x7, across a multitude of channels, "on demand" - banks are driven to engage using new channels: mobile, social media. This introduction to the API-engagement models is driving entirely new workloads for the Banks' infrastructure. Cloud is the only way they can cope with this new engagement model. In this short 5-minute deck, I present 5 reasons why Banks need cloud today.