As human beings we have the same experience of destructive and constructive emotions. We also have a human mind capable of developing wisdom. We all have the same Buddha nature.
An investor will succeed by coupling good business judgment with an ability to insulate his thoughts and behavior from the super-contagious emotions that swirl about the marketplace.
The elimination of the will altogether and the switching off of the emotions all and sundry, is tantamount to the elimination of reason: intellectual castration.