"This no-brainer option has become the retirement rage in the wake of the passing of the Pension Protection Act of 2006, which allowed employers to automatically enroll their employees in target-date funds. Since then, total target-date fund assets have jumped four-fold to $475 billion as of November 2012.... More than 80% of retirement plans managed by mutual fund giant Vanguard offer them, and nearly a quarter of participants stash all of their retirement cash in a target-date fund.... But target-date funds come with risks."  MORE >>