Turning 30 just got a lot scarier. A coming collapse in investment returns means that people that age today will have to work seven years longer or save almost twice as much to end up with the same nest egg as those of roughly a generation ago. So says the research arm of McKinsey & Co. in a new report that argues that investors of all ages need to resign themselves to diminished gains. The consulting company maintains that the last 30 years have been a “golden era” of exceptional inflation-adjusted returns thanks to a confluence of factors that won’t be repeated. They include falling inflation and interest ... (full story)