Data for financial bubbles

Here is an indicator from Phillips,Wu and Yu to determine bubbles.

https://mercury.smu.edu.sg/rsrchpubupload/22550/04-2013.pdf2

There is a need for data to test bubbles.  This can come from Reinhart and Rogoff or Ahamed.

Financial booms and busts were, and continue to be, a feature of the economic landscape. These bubbles
and crises seem to be deep-rooted in human nature and inherent to the capitalist system. By one count there
have been 60 different crises since the 17th century.

Ahamed (2009).

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