Robo advisors can push risk averse millennials into the stock market, according to Ron O'Hanley, president and CEO of State Street Global Advisors. 'What's appealing to millennials is a terrific interface - on your tablet on your iPhone,' he said, referring to robo advisors. 'Secondly, I think there is a general distrust of institutions and therefore a desire to have a lot of transparency on how things are working and robos achieve that.' TheStreet's Rhonda Schaffler reports from the 2016 Milken Institute Global Conference in Los Angeles.