"There is no standard
definition of a bubble, but all bubbles look alike because they all go through
similar phases. The bible on bubbles is Manias, Panics and Crashes, by Charles
Kindleberger. In the book, Kindleberger outlined the five phases of a bubble.
(...)
Stage 1: Displacement
All bubbles start with some basis in reality. Often, it is a new disruptive technology that gets everyone excited, although Kindleberger says it doesn’t need to involve technological progress. It could come through a fundamental change in an economy; for example, the opening up of Russia in the 1990s led to the 1998 bubble or in the 2000s interest rates were low and mortgage lenders were able to fund themselves cheaply. In this displacement phase, smart investors notice the changes that are happening and start investing in the industry or country."
Stage 1: Displacement
All bubbles start with some basis in reality. Often, it is a new disruptive technology that gets everyone excited, although Kindleberger says it doesn’t need to involve technological progress. It could come through a fundamental change in an economy; for example, the opening up of Russia in the 1990s led to the 1998 bubble or in the 2000s interest rates were low and mortgage lenders were able to fund themselves cheaply. In this displacement phase, smart investors notice the changes that are happening and start investing in the industry or country."