Information Efficiency of the Capital Market: a Stochastic Calculus Approach Evidence from the Czech Republic (in English)

This paper deals with an important characteristic of the capital market: information efficiency. With the use of geometric Brownian motion, the authors run several projections of stock prices based on varying amount of historic information and compare these projections with the real behavior of the stock prices, examining for predictability. This enables to verify the condition of the weak-efficiency hypothesis in the form of a Markov process. The authors conduct the empirical part of their analysis in the environment of the Czech capital market, thus providing additional information on the development of transition economies.