openIn this thesis, the central point is the application of stock price dynamics of the Italian stock exchange, in the period between June 1973 and April 1998. Given the daily percentage returns, in order to estimate some other parameters, is useful to introduce the preliminary notions of Markov chains and Polya process, essential to understand the Ehrenfest-Brillouin model. This model is fundamental to the interpretation of a moving system of elements in some categories, and that can be applied, in particular, to price increments in a stock market.In this thesis, the central point is the application of stock price dynamics of the Italian stock exchange, in the period between June 1973 and April 1998. Given the daily percentage returns, in order to estimate some other parameters, is useful to introduce the preliminary notions of Markov chains and Polya process, essential to understand the Ehrenfest-Brillouin model. This model is fundamental to the interpretation of a moving system of elements in some categories, and that can be applied, in particular, to price increments in a stock market
