A recent study by Prudential Financial found that most workers nearing retirement age with investable assets of at least $100,000 are confident that they will have enough to retire. But the company's Global Retirement Pulse Survey also suggested that these folks – Pru calls them the "mass affluent" – may not be as prepared as they could be.

David Blanchett, Prudential's head of retirement research and a portfolio manager and PGIM – Pru's investment management arm – discusses the survey's findings, its implications and what workers at various stages of their careers should be doing now.