Some call them HENRY's—High Earners Not Yet Rich. Others call them the Faux Riche—people who look rich but aren't.
In my last book, I called them the High-Beta Rich, a new class of wealthy whose spending and wealth fluctuate wildly with markets.
A new paper calls them the "hand-to-mouth" wealthy. And it says there are 70 million such households in the U.S., suggesting that wealth today is far more precarious than many think.