Op-ed: At some point, sky-high valuations will matter just like they did for the dot-com busts

It’s not often that celebrity home-buying sprees give me insights into the stock market.

However, when I read last Friday about Ellen DeGeneres’ purchase of a $49 million house in Montecito, California, I realized that this behavior helped me understand the current exuberant state of the stock market.

Read the full article on CNBC.com