Robo-advising is gaining traction with younger investors and will become a trillion-dollar industry one day — and even Wall Street banks are willing to admit it. This comes from a September 3 report from Citigroup, titled “Rise of the Machines: Retail Revolution." In just two years, the report notes, robo-advisers have boosted their assets from virtually nothing in 2012 to $14 billion by the end of 2014. And they’re just getting warmed up. Over the next 10 years, their assets under management could expand exponentially, to $5 trillion, the report speculates. Already big corporate players like Charles Schwab and ... (full story)