Interestingly, he didn't answer the question with a no. He described a situation that, to some readers, may be a yes. "It's hard to sustain a bubble for four

Interestingly, he didn't answer the question with a no. He described a situation that, to some readers, may be a yes. "It's hard to sustain a bubble for four years, but here we are," in essence. He explains that the demand for stock in certain companies is artificially high, driving up valuations by a multiple.