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Information published on social networks and their impact on the cryptocurrency market
ŠŤASTNÝ, Petr
The aim of the diploma thesis is to verify the influence of information published on social networks on the profitability of selected cryptocurrencies. The diploma thesis is divided as follows. First, the theoretical part explains the basic issues, introducing the cryptocurrency industry along with an insight into the cryptocurrencies under study. This is followed by the theoretical basis of the research, in which the event study is described along with the theory of efficient markets. The theoretical part is followed by the methodological part. In it, the aim of the diploma thesis is described in more detail, along with the hypotheses under investigation. Furthermore, the methodological procedure of the research, along with the data analysed. The analytical part itself focuses on examining the impact of social media posts, while maintaining the methodological procedure. Next, the chosen hypotheses are tested. This is summarised within the evaluation of the results, along with an assessment of the sub-objective of the thesis.
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Gambler's Fallacy in Investors' Decision-making
Javůrková, Tereza ; Kukačka, Jiří (advisor) ; Červinka, Michal (referee)
This thesis focuses on the Gambler's Fallacy and its effect on the behavior of investors operating in the stock market. The aim is to incorporate the psychological findings about this behavioral phenomenon to the field of finance. This allows us to analyze the dynamics of the stock market that results from human misconceptions about the probabilities of independent events. More specifically, we analyze the profitability of two types of virtual investors whose decision-making is affected by distorted probabilities based on the Gambler's Fallacy. We further define two other trivial benchmark investors' strategies with different levels of randomness. We examine investors' gains in a simulated efficient market as well as in the real S&P 500 index constituents. Our analysis builds on three different approaches: simulation analysis, empirical frequency analysis, and asset pricing models. By applying the simulation approach together with frequency analysis on the historical stock prices, we find that investors affected by the Gambler's Fallacy gain statistically higher returns than a random investor. Then, we ap- ply both the three-factor and five-factor Fama & French asset pricing model to stocks sorted into portfolios based on their previous earnings per share evo- lution. Our findings reveal a negative...
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Assessment of stock market efficiency and selection of a suitable investment strategy
SCHREIB, Vladimír
The work aims to approach the analysis of the efficiency of the stock markets and to create a suitable investment strategy, the result of which is the maximization of the possible return. The theory of efficient markets is based on the assumption that there are no stocks on the market that would be poorly valued, since all information is available and is immediately reflected in the share price. Based on that assumption, abnormally high profits that would exceed the market average cannot be achieved in the long term. Using statistical tests, the research compares the efficiency and performance of stock markets across stocks and indexes from around the world in the period from 2017 to 2021 and then selects an appropriate investment strategy using a passive, technical and fundamental strategy. The conclusion is that although the markets behave very differently, the overall efficiency could be described as weak. A passive portfolio investment was chosen as a suitable investment strategy.
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Capital Market Anomalies
FIALA, Michal
This work describes a total of three theories by which capital market price movements can be explained, as well as capital market anomalies. Empirical research is focused on the analysis of temporal anomalies, namely the day-of-the-week effect and the month-of-year effect. These effects were analysed on three indexes, namely the NASDAQ Composite Index, Euronext 100 Index and SSE Composite Index. These effects are tested first using the statistical testing method and then more closely using the linear regression method.
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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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An empirical study of impact of inclusion and exclusion from an Index on stock prices
Vellechová, Karolína ; Vozárová, Pavla (advisor) ; Fanta, Nicolas (referee)
This thesis studies the effect of index components changes on the stock prices of added and deleted components. Specifically, the thesis follows two market indexes from Western Europe, CAC 40 and DAX 30, in the period from financial crisis in 2008 to 2020. The theory of Efficient Market Hypothesis suggests that index components change should not impact firm's price, because the index membership is supposed to have no new information, the findings of various researchers found out the opposite. There are several hypotheses, which try to explain these effects. In this thesis three methods were used to estimate the effect of addition and deletion, these were abnormal return, abnormal trading volume and close open difference calculation. The results obtained by all three methods were mostly consistent with the results of previous studies of the US indexes. The calculation of abnormal volume reported significant and expected results for both indexes, which suggested that the day before the change has the highest abnormal volume. Also, the results for close open differences discovered expected pattern, that the highest change happens usually on the day after announcement, which informs about how fast investors reply to index change. The abnormal returns for the CAC 40 index show expected significant...
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The Effect of M&A on Competitors' Performance in China and the US
Wojnarová, Renáta ; Kukačka, Jiří (advisor) ; Teplý, Petr (referee)
We examine the effect of merger announcements on the stock performance of acquirers' industry rivals in the context of Chinese and US deals between 1994 and 2017. Our analysis reveals that investors of rivals are able to earn abnormal returns during days around merger announcement, meaning that markets are not fully efficient as implied by the Efficient market hypothesis. We conclude that in a reaction to the announcement, US rivals achieve generally negative abnormal returns with higher magnitude and volatility compared to Chinese rivals. Additionally, we observe that Chinese investors' perception of mergers turned out to be more conservative after the Global financial crisis. During days around the merger announcement, signs of rivals' abnormal returns also differ on whether the target is public or private in both countries. Rivals operating in industries that are substantially supported by Chinese government such as real estate, pharmaceuticals, and chemicals experience positive reaction on mergers of their competitors. Furthermore, we find that industries with increasing im- portance in Chinese developing economy such as banking, telecommunications, and cyclical consumer products show a positive reaction of rivals' returns on merger announcements while in the developed US economy, a negative...
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Capital market efficiency in the Ising model environment: Local and global effects
Krištoufek, Ladislav ; Vošvrda, Miloslav
Financial Ising model is one of the simplest agent-based models (building on a parallel between capital markets and the Ising model of ferromag- netism) mimicking the most important stylized facts of financial returns such as no serial correlation, fat tails, volatility clustering and volatility persistence on the verge of non-stationarity. We present results of Monte Carlo simulation study investigating the relationship between parameters of the model (related to herding and minority game behaviors) and crucial characteristics of capital market e ciency (with respect to the e cient market hypothesis). We find a strongly non-linear relationship between these which opens possibilities for further research. Specifically, the existence of both herding and minority game behavior of market participants are necessary for attaining the e cient market in the sense of the e cient market hypothesis.
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Credit Derivatives Market during Recent Financial Crisis
Buzková, Petra ; Teplý, Petr (advisor) ; Tripe, David (referee) ; Witzany, Jiří (referee) ; Dědek, Oldřich (referee)
The dissertation is composed of three empirical research papers analyzing the development on credit derivatives markets in recent years characterized by the global financial crisis in 2007- 2009 and subsequent European sovereign debt crisis. The basic motivation of the thesis is to contribute to the clarification of the turbulent development on credit derivatives markets. The first paper addresses main flaws of a collateralized debt obligation (CDO) market during the global financial crisis. The second paper examines the impact of the Greek debt crisis on sovereign credit default swap (CDS) reliability. The third paper analyzes whether a resulting change in CDS terms restored confidence in CDS contracts. An introductory chapter presents a common framework for the three papers. In the first paper, we examine valuation of a Collateralized Debt Obligation (CDO) in 2007- 2009. One Factor Gaussian Copula Model is presented and five hypotheses regarding CDO sensitivity to entry parameters are analyzed. Four main deficiencies of the CDO market are then articulated: i) an insufficient analysis of underlying assets by both investors and rating agencies; ii) investment decisions arising from the valuation model based on expected cash-flows and neglecting other factors such as mark-to-market losses; iii)...
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CEE & SEE Markets Macro-Fundamental Analysis
Poštulková, Jitka ; Polyák, Oliver (advisor) ; Cahlík, Tomáš (referee)
The aim of this thesis is to verify and analyse presumed relations between selected macro-fundamentals, namely USD exchange rate, production index, interbank offered rate, inflation, money supply and two exogenous indices ( Standard & Poor's 500 and EURO STOXX 50), and CEE (Austria, Czech Republic, Poland, Hungary) or SEE (Bulgaria, Croatia, Slovenia, Romania) financial markets over the period from December 1995 to December 2015. In order to test the long-run cointegration relationships between studied markets and the set of macroeconomic variables, the Engle-Granger and Johansen tests are applied. The vector error correction model is used to confirm the long-run equilibrium interlinkages and the results show similar trend tendencies between stock indices and some of the macro-fundamentals in Croatia, Czech Republic, Hungary, Poland and Romania. To verify the short-run causal linkages, the Granger causality test is employed. Based on retrieved findings, the efficiency of studied markets with respect to Efficient Market Theory is reviewed. Our findings reveal several pairwise short-run causal impacts between studied macroeconomic indicators and stock indices. The only indicator which does not impact any stock market is the interbank offered rate. Moreover, according to our results, all CEE&SEE stock...
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