Estimation of volatility of financial time series plays a crucial role in pricing derivatives. Volatility is often estimated from historical data; however, it is well known that volatility varies in time. We propose a method to choose a suitable length of historical data to estimate contemporary...

Efficient Market Hypothesis has dominated the field of research on capital market theory. It postulates that asset prices are rationally connected to economic realities and always incorporate all the information available to the market. A huge quantity of theoretical works around the world have...

The article is concerned with voting indicators in the European Union. The first chapter constructs a model of voting power and defines four indicators: A. Simple relative power, B. Shapley-Shubik index, C. Banzhaf index, D. Coleman index. The second chapter defines data: the voting structure...

This study explores bank´s transformation in the Czech Republic from the point of view of their profit. It considers factors that influenced domestic banks and income structure of peer groups. Under conditions of equal competition, the peer groups showed different characteristics in terms of...

Volatility of the financial time series belongs to the crucial estimated parameters in finance (e.g. in risk management, derivative pricing). It is well known, that volatility varies in time, so that new approaches of volatility modeling have appeared. In this paper two models of the conditional...

The authors use a variance ratio test to test the weak form of market efficiency as regards capital markets in the Czech Republic, Slovakia, Hungary, Poland, and in the United States. Market efficiency was tested using weekly and monthly values of relevant market indices in a period from 1993...

Kooperativní chování je nezbytnou podmínkou pro existenci moderních komplexních společenství a ekonomik, jak je známe dnes. Z pohledu společenských věd je proto zajímavé porozumnět, jak takové chování může převažovat i v situacích, kdy jednoduchá úvaha vede k opačnému...

Kooperativní chování je nezbytnou podmínkou pro existenci moderních komplexních společenství a ekonomik, jak je známe dnes. Z pohledu společenských věd je proto zajímavé porozumnět, jak takové chování může převažovat i v situacích, kdy jednoduchá úvaha vede k opačnému...

This paper considers various options replication methods. Firstly, a specific type of barrier option, an up-and-out call, is considered. Other barrier options are briefly also described, and various types of barriers are considered. Secondly, a general definition of replication methods is...