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Efficient market hypothesis in the modern era
Vlček, Šimon ; Krištoufek, Ladislav (advisor) ; Korbel, Václav (referee)
Efficient Market Hypothesis (EMH) has been the central assumption of financial modelling in the previous decades. At its core, it is a statement about the efficient incorporation of available information in the prices of assets, rendering each price a 'true' representation of the asset's intrinsic value. The notion of informationally efficient financial markets has been, since its formulation, entrenched in the very core of our understanding of how asset pricing works, yet, with ever so increasing frequency, when subjected to empirical scrutiny, it fails to prove its explanatory and predictive prowess. New academic strands emerged have emerged as a result, attempting to explain those empirical short-comings, with rather mixed results. The new models and theories often either explain a singular anomaly, rather than pro- viding a generalized and consistent theoretical framework, or are exclusive with the general state of financial markets, which tends to be efficient and rational. This thesis shall explore the relationship of information and financial mar- kets, taking into account developments that have occurred since the inception of the EMH. Subsequently it will present a new theoretical model for asset pric- ing and ipso facto the efficiency of financial markets, based on meta-analysis of information, along...
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Capital Market Hypotheses and Their Statistical Implications: A Comparative Study
Petras, Petr ; Krištoufek, Ladislav (advisor) ; Křehlík, Tomáš (referee)
In this bachelor thesis we focus on different Market Hypotheses. Specifically on Efficient Market Hypothesis, Fractal Market Hypothesis and Coherent Market Hypothesis. In the first part of the work we provide description of researched hypotheses and methods used for testing. In the second part of the work we run test on time series of share markets, gold markets and currency markets and test if our hypotheses can provide explanation about price changes on those markets. For Efficient Market Hypothesis we wonder if prices are following random walk (via augmented Dickey-Fuller test), if residuals are normally distributed (via Shapiro-Wilk and Jarque-Bera tests) and if residuals are uncorrelated (via Box-Pierce test). For Fractal Market Hypothesis we are trying to find value of Hurst exponent via Rescaled Range analysis. This exponent describes if time series are persistent or not. And for Coherent Market Hypothesis we develop simple method for testing if some time periods can yield above-average revenues, thanks to increased mean and decreased standard deviation. After that we find out what are consequences of short time series and different frequencies for obtaining data points and we learn that some hypotheses describes different time periods or lengths better and are not so good for different ones. Powered...
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Behaviour of Stocks on the Prague Stock Exchange During the Financial Crisis: Evidence from Empirical Research
Koza, Oldřich ; Teplý, Petr (advisor) ; Krištoufek, Ladislav (referee)
This work studies the behaviour of the four most traded stocks on the Prague Stock Exchange from January 2007 to July 2010. Its main goal is to describe how the financial crisis influenced the Prague Stock Exchange. Employing standard statistical methods, ARMA, GARCH, and VAR models I examine on daily data the following phenomena: volatility, price jumps, the day of the week effect, validity of the efficient market hypothesis, and information flow between the stocks. The results imply that the financial crisis had stronger impact on the banking sector stocks than on other stocks. The crisis was mainly characterized by rapid growth in volatility and correlation between the stocks. It also influenced the information flow and the day of the week effect. However, the crisis did not trigger growth in the number of extreme price movements, and it did not cause the market to be less information efficient.
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Fundamental and technical analysis of a particular asset
Nepomnyashchiy, Ilya ; Fičura, Milan (advisor) ; Mazáček, David (referee)
The goal of the thesis is to evaluate the degree of efficiency of the particular markets and to apply the methods of fundamental and technical analysis on them in order to assess their efficiency in terms of profitablity. The thesis analyses the degree of long-term memory of the particular commodities and stock indices via Hurst coefficient. Afterwards fundamental and technical methods are applied to the market with the highest degree of long-term memory, which is the feeder cattle market. Indidivual methods from both disciplines are being applied at first, after wich a combnation of both is appleid as well. The result is the discovery, whether combining the two approaches leads to a higher profitability of the trading strategy. At the end the effect of transacton costs is also evalauted and a final conclusion is made regarding the profit potential of both methods for the case of individual Czech investor.
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Determinism, Path-depedence and Uncertainty: A Post-Keynesian Perspective
Máslo, Lukáš ; Chytil, Zdeněk (advisor) ; Janíčko, Martin (referee) ; Pastoráková, Erika (referee)
The thesis deals with analysis of conceptual-methodological issues examined in the framework of post-keynesian economics. The author´s goal is to supply a solution to the problem of a definition of determinism/non-determinism for both deterministic and stochastic systems and also to the problem of the prevailing confusion which surrounds the notion of reversibility/irreversibility in both path-dependent and traditional-equilibrist systems. The author regards the determinism/non-determinism problem as essentially linked to the problem of a definition of fundamental uncertainty. The key issues are being identified in the "problem of a generator of endogenous shocks" and the "selection - creation problem". Finding solutions to these enables us to take a stand on the validity/invalidity of the classical dichotomy, in the eyes of the author. Davidson´s interpretation of ergodicity and O´Donnell´s critique of this are being presented and, drawing on the latter, along with Álvarez-Ehnts´ critique, the author rejects a simplifying pattern of Davidson´s, according to which neoclassical economics is based on the ergodic axiom. The author suggests a solution to the "selection - creation problem" consisting in distinguishing epistemological determinism from ontological determinism on the one hand, and epistemological determinism from epistemological non-determinism on the other hand. While selection is a characteristic feature of epistemological determinism and, in effect, the realm of "fundamental certainty", creation is referred to by the author as a characteristic feature of epistemological non-determinism, i. e., in effect, the realm of fundamental uncertainty. The author regards the "problem of a generator of endogenous shocks" a self-contradictory notion, based on the principle of causality and the law of non-contradiction, and suggests a solution to the problem consisting in rejection of the concept of shock endogeneity. At the same time, the author rejects Davidson´s "fundamental neoclassical article of faith" rhetoric, based on the first cause argument implied by the principle of causality. In opposition to Davidson, the author regards fundamental uncertainty being of a basically epistemological nature, consisting in our ignorance of the "ultimate law of change", the "Devine formula". Unlike O´Donnell, however, who puts stress on the element of epistemological uncertainty in his epistemological approach to uncertainty, the author also puts stress on the element of ontological certainty, consisting in our knowledge of the existence of the "Devine formula", apart from our epistemological uncertainty.
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Capital Asset Price Modelling: Concept VAPM
Kuklik, Robert G. ; Janda, Karel (advisor) ; Kodera, Jan (referee) ; Lukáš, Ladislav (referee)
The key objective of this thesis is the outline of an alternative capital market modeling framework, the Volatility Asset Pricing Model, VAPM, inspired by the innovative dual approach of Mandelbrot and Hudson using the method based on synthesis of two seemingly antagonistic factors -- the volatility of market prices and their serial dependence determining the capital markets' dynamics. The pilot tests of this model in various periods using the market index as well as a portfolio of selected securities delivered generally satisfactory results. Firstly, the work delivers a brief recapitulation regarding the concepts of a consumer/investor choice under general conditions of hypothetical certainty. Secondly, this outline is then followed by a description of the "classical" methodologies in the risky environment of uncertainty, with assessment of their corresponding key models, i.e. the CAPM, SIM, MIM, APTM, etc., notwithstanding results of the related testing approaches. Thirdly, this assessment is based on evaluation of the underlying doctrine of Efficient Market Hypothesis in relation to the so called Random Walk Model. Fourthly, in this context the work also offers a brief exposure to a few selected tests of these contraversial concepts. Fifthly, the main points of conteporary approaches such as the Fractal Dimension and the Hurst Exponent in the dynamic framework of information entropy are subsequently described as the theoretical tools leading to development of the abovementioned model VAPM. The major contribution of this thesis is considered its attempt to apply the abovementioned concepts in practice, with the intention to possibly inspire a further analytical research.
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The Analysis of Selected Stock Market Investment Strategies
KÁCHOVÁ, Veronika
This diploma thesis was aimed at analysing the investment strategies on the American stock market. The main aim was to evaluate the market efficiency, to analyse various strategies and to select the most appropriate one according to the assessed form of the market efficiency. Firstly, the weak-form efficiency was validated by correlation and runs tests. Subsequently, the methods of technical and fundamental analysis were applied. The final part is focused on creating the investment portfolio, which is also considered the most suitable strategy.
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The Assessment of the stock market effectiveness and choosing the appropriate investment strategy
MEDKOVÁ, Petra
This thesis is dedicated to the stock markets issue. Its main aim was to assess the effectiveness of the stock market and choose an appropriate investment strategy. To this purpose, the 5 industries of U.S. stock market were chosen, which served as a data base for all applied methods. The thesis presents the results of correlation and runs tests verifying the weak form of market efficiency, the results of fundamental analysis and of active strategies simulation as well. The final part is focused on creating of investment portfolio, which was chosen as the most appropriate investment strategy of the refenrence data set.
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Current models of liquid financial markets
Grosu, Iulia ; Stádník, Bohumil (advisor) ; Pumprová, Zuzana (referee)
The aim of this paper is to provide a comprehensive overview of selected current models of liquid financial markets, namely to explain their basic principles, assess their strengths and deficiencies and compare them with each other. The thesis is divided into six chapters. The first five chapters focus on the theoretical description of five different models, including their assumptions, the resulting consequences and, where possible, their mathematical formulation. The particular chapters also examine the major problems of the models and provide clear summaries and conclusions. Specifically, this paper discusses the efficient market hypothesis, models of behavioral finance, technical analysis, changing volatility models and dynamic feedback models. The last chapter compares the particular models.
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Financial market anomalies
Uherek, Jiří ; Havlíček, David (advisor) ; Janda, Karel (referee)
The bachelor thesis is focused on the most known financial markets anomalies. In the first part the efficient market hypothesis is described as traditional theory of finance. The most known financial markets anomalies are listed and analyzed in the second part of this thesis. In this part is also offered an explanation of these anomalies from the point of view of behavioral finance. The final section analyses particular anomaly -- the weekend effect. The analysis confirmed the occurrence of weekend effect on different markets. The conclusion based on research of several trading strategies is that there is not possible to gain excess return from knowledge of weekend effect. The analysis also confirmed the change of return patterns in last decade.
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