E. Gordeev
The fear and greed index is a contrarian index of sorts. It is based on the premise that excessive fear can result in stocks trading well below their intrinsic values, and that unbridled greed can result in stocks being bid up far above what they should be worth.
https://www.investopedia.com/terms/f/fear-and-greed-index.asp
https://www.investopedia.com/terms/f/fear-and-greed-index.asp