"Do I think we're in a bubble of some sort? Sure, we're in some kind of bubble," Andrew Ross Sorkin told Business Insider.
In fact, there have only been six instances since 1871 where the Shiller P/E has surpassed 30 (for a period of at least two ...
The U.S. stock market's bull run is almost three years old, but if history is a guide, that would make it only middle-aged.