After explaining our attempts to rationalize this irrational behavior, Shiller then offers some solutions to prevent future speculative bubbles. http://stockcharts.com/school/data/media/chart_school/overview/irrational_exuberance/irex-1-spx.png images.investorshub.advfn.com/images/uploads/2013/2/23/ovsdnnow_you_know.PNG