Why are theoretically perfect and efficient capital markets so imperfect and volatile in practice?

Research Paper (undergraduate) from the year 2010 in the subject Business economics - General, grade: 1,3, University of Applied Sciences Northwestern Switzerland, language: English, abstract: The Efficient market hypothesis can be considered as part of rational economics but it does not specify at all how individuals should or will act. Therefore it might be a useful model of the functioning of t...