"Just because asset prices go up doesn't mean it's a bubble," BMO's Brian Belski told Business Insider.

What is a stock market bubble? A stock market bubble is a speculative frenzy when stock prices vastly exceed the fundamental ...

While Nvidia stock is still pricey in many respects, it may have ceded the title of "Wall Street's biggest bubble stock" to ...

"This market is not just more concentrated and frothy than at the top of the dot-com bubble, but also more concentrated than any time in US stock market history going back to the late 1800s during ...

This position seems different from Cisco's — or those of other historical bubble stocks. Even though Cisco was "the" stock at that time, the company, which sells switches and routers ...