Made available in DSpace on 2016-03-15T19:31:20Z (GMT). No. of bitstreams: 1 Patricia Marilia Ricomini e Almeida.pdf: 431610 bytes, checksum: 0efa171a28be7631027cccbcc8a1bc23 (MD5) Previous issue date: 2010-03-08 / Fundo Mackenzie de Pesquisa / The concept of efficient market hypothesis has been the focus of finances for a long time, with the development of powerful theoretical reasons to explain why the hypothesis should remain. Since the beginning of 1930, the first papers about the analysis of securities were in evidence, it s been emerging the idea that the fundamental value of any security should be equal to the discounted cash flow from it and prices would vary around their fundamental values. Despite of security s present value beeing the best indicator to reflect their true value, this model covers expectations about future income, discount rate and people s racionality, becoming dificult the aplication of this model uses. As consequence, Campbell e Shiller (1987) developed the cointegration model, a powerful framewoork for testing expectations and racionality in financial markets. In this context, the literature about panel with unit roots and cointegration have been extended in a fast way. In part, this is happening due to the complex nature of interactions and dependences that, generally, ocurrs during the time and between individual units in the panel. The major recent concern of econometric literature, related to the cointegration tests and the unit roots of the dynamic panels, has been the development of tests that control the cross sectional dependence. In such case, an econometric model was adopted based on the application of the unit roots and the cointegration tests in panel, with the firm beeing the unit of analysis. To deal with the serial correlation, problems of nonstationary series as well as problems of small sample, recent techniques were applied in this study: panel dynamic OLS (DOLS) and fully modified OLS (FMOLS). Nine stocks, that compose the São Paulo Stock Exchange Index, have been analyzed throughout the period between 1994 and 2008. Summarizing, in spite of some conflicting results, it s possible to prove that there is a cointegration process between the prices of equities traded at BM&FBOVESPA and the dividends. The results obtained in this study allow the partial validation of the present value model at the firm level. However, the prices seemed not to reflect the expectation of dividends for the brazillian market. Therein, the prices of equities are over valued in relation to the payment of the dividends. Future researchs about the present value model for the brazillian market should be done. / A Hipótese de Eficiência de Mercado tem sido a proposição central das finanças durante muitos anos, com o desenvolvimento de razões teóricas poderosas explicando porque a hipótese deveria permanecer. A partir da década de 30, destacam-se os primeiros trabalhos relacionados à análise de títulos, surgindo a idéia de que o valor fundamental de qualquer título seria igual ao fluxo de caixa descontado deste, e que os preços atuais iriam variar em torno dos valores fundamentais. Apesar do valor presente de um ativo ser o melhor indicador para refletir seu verdadeiro valor, ele envolve expectativas sobre a renda futura, a taxa de desconto e a racionalidade das pessoas, tornando difícil a aplicação na prática desse modelo. Surge, então, o modelo de cointegração de Campbell e Shiller (1987), uma ferramenta útil para o teste de expectativas e racionalidade nos mercados financeiros. Nesse contexto, a literatura sobre painel com raízes unitárias e cointegração começa a crescer rapidamente. Em parte isso ocorre em função da natureza complexa de interações e dependências que geralmente existem ao longo do tempo e entre as unidades individuais no painel. A maior preocupação da literatura, no que diz respeito à análise de dados em painéis dinâmicos, tem sido o desenvolvimento de testes que controlem a dependência cross sectional. Nesse estudo,adotou-se um modelo econométrico baseado na aplicação de raízes unitárias e testes de cointegração em painel, tendo a empresa como unidade de análise. Para tratar a correlação serial, problemas de não estacionariedade das séries bem como problemas de pequena amostra, foram adotadas as técnicas de Panel Dynamic OLS (DOLS) e Fully Modified OLS (FMOLS). Analisaram-se nove ações (Klabin, Petrobrás, Bradesco, Itáu, Cemig, Ambev, Souza Cruz, Aracruz e Vale) para o período de 1994 a 2008. Apesar de alguns resultados conflitantes, é possível afirmar que existe um processo de cointegração entre os preços das ações negociadas e os dividendos. Os resultados permitem a validação parcial do modelo de valor presente a nível individual, já que os preços das ações parecem não refletir integralmente a expectativa dos dividendos para o mercado brasileiro. Os preços das ações estão superavaliados com relação aos dividendos. Recomendam-se pesquisas futuras sobre o modelo de valor presente para o mercado financeiro brasileiro.

Esse estudo visa testar a eficiência informacional dos mercados acionários brasileiro e mexicano, através do desenvolvimento de um estudo de eventos. Para viabilização do estudo, o mercado brasileiro será representado pela BOVESPA - Bolsa de Valores de São Paulo e o mercado mexicano pela BMV - Bolsa Mexicana de Valores. Especificamente, esses mercados serão representados pelas ações de empresas que participaram da composição das carteiras teóricas dos Índices IBOVESPA e IpyC (Índice de Precios y Cotizaciones) durante todo o período compreendido entre Janeiro de 2001 e Janeiro de 2006. Foram analisadas as reações dos retornos das ações nesses mercados nos dias próximos às datas das divulgações de resultados trimestrais pelas empresas em busca de evidências de ineficiências. Os resultados encontrados mostraram indícios de eficiência informacional quando as empresas foram consideradas individualmente e indícios de ineficiência informacional quando considerada carteira toda. / This study aims to test the informational efficiency of the Brazilian and Mexican stock markets, through the development of an event study. For this purpose, BOVESPA, the Sao Paulo Stock Exchange will represent the Brazilian stock market while the Mexican Stock Exchange (BMV) will represent the Mexican stock market. Specifically, these markets will be represented by the company stocks that participated of the composition of their stock market indexes, IBOVESPA (BOVESPA Index) and IPyC (Mexican Stock Exchange Index), during the period of January 2001 through January 2006. Stock prices were analyzed for the days around the quarterly results release dates, searching for inefficiency evidence in these markets. The results show signs of information-efficiency when considering each company and information inefficiency when considering the market portfolio.

På 1980-talet handlade en grupp, som kallades för The Turtle Traders, med två trendföljande handelsstrategier helt baserade på teknisk analys på ett stort antal finansmarknader. De två handelsstrategierna byggde på mekaniska regler för köp- respektive säljbeslut och riskhantering, men även regler för vilka marknader som var tillåtna att handla på. Gruppen var mycket framgångsrik under flera år och medlemmarnas avkastningar översteg marknadernas avkastningar med råge. Den svaga varianten av den effektiva marknadshypotesen säger att detta ska vara omöjligt på effektiva marknader. På en effektiv marknad är det enligt hypotesen istället bättre att följa en buy-and-hold strategi. Hur kommer det sig att The Turtle Traders lyckades? Var det bara tur att de två trendföljande strategierna, som genererade köp- och säljbesluten, gav väldigt höga avkastningar under några år på 1980-talet? Eller är inte marknaderna effektiva? Inom forskningen råder det idag en oklar bild kring den effektiva marknadshypotesen och huruvida marknaderna är effektiva. Olika vetenskapliga studier presenterar tester som både stöder och förkastar hypotesen. Syftet med det här examensarbetet är att visa huruvida de två trendföljande strategierna fortfarande är vinstgivande och därmed användbara strategier på dagens finansmarknader. Syftet är också att jämföra de två strategierna med buy-and-hold strategin på olika marknaderna och därmed bidra med ytterligare insikter till den numera alltmer ifrågasättande diskussionen kring den effektiva marknadshypotesen, med speciellt fokus på den svaga varianten. För att få fram vilka avkastningar de två trendföljande strategierna ger på dagens marknader konstrueras inom ramen för detta examensarbete ett datorprogram som simulerar de köp- och säljbeslut som skulle tas med hjälp av de mekaniska regler som de två trendföljande strategierna bygger på. Undersökningen i examensarbetet ger, precis som många andra undersökningar, en oklar bild kring den effektiva marknadshypotesen. Hälften av de finansmarknader som undersöks tycks vara ineffektiva och hälften effektiva, enligt den svaga varianten av hypotesen. Undersökningen visar även att de två trendföljande strategierna inte är så pass vinstgivande att de kan rekommenderas att använda på dagens finansmarknader. / During the 1980s a group called The Turtle Traders used two trend following trading strategies, based on technical analysis, to trade a large number of financial markets. The two trading strategies used mechanical rules to make buy and sell decisions and to manage risk. The rules also specified which markets to trade. The group was very successful during several years in the 1980s and the returns the members of the group generated, using the two trading strategies, widely surpassed the returns of the markets. The weak form of the efficient market hypothesis states that this should be impossible on markets that are efficient. On efficient markets it is instead better to follow a buy-and-hold strategy. How come that The Turtle Traders succeeded? Was is just luck that the two trend following strategies, that generated the buy and sell decisions, resulted in such high returns during a few years in the 1980s? Or are the markets inefficient? Current research gives an unclear picture regarding the efficient market hypothesis and whether or not the markets are efficient. Different studies present results that both support and reject the hypothesis. The purpose of this bachelor thesis is to show whether or not the two trend following strategies still are profitable and therefor useful strategies on the financial markets of today. The purpose is also to compare the two strategies with the buy-and-hold strategy on different markets and in this way contribute with more insights to the ongoing and nowadays often increasingly questioning discussion regarding the efficient market hypothesis, with special focus on the weak form of the hypothesis. To get the returns of the two trend following strategies on the financial markets of today a computer program is constructed as part of this bachelor thesis. This computer program simulates the buy and sell decisions that would have been taken by the mechanical rules the two trend following strategies are built upon. The study done in this bachelor thesis gives, just as many other studies, an unclear picture of the efficient market hypothesis. Half of the markets that are studied in this thesis seem to be inefficient and half seem to be efficient, according to the weak form of the hypothesis. The study also shows that none of the two trend following strategies are profitable enough that they can be recommended to be used on the financial markets of today.

L’objectif des travaux présentés dans cette thèse est d’étudier la diffusion de l’information dans les marchés financiers. Considérant comme établi que les individus sont hétérogènes et à rationalité limitée, nous avons fondé nos travaux sur une catégorie de modèles computationnels dans le but de simuler les actions et les interactions des agents autonomes. Cette catégorie est communément nommée modélisation agent (ABM).Plus concrètement, cette recherche se concentre sur le rôle de l’hétérogénéité des agents dans la diffusion et l’utilisation de l’information. À cet effet, nous avons développé deux structures de marché, qui diffèrent par leur transparence. Dans les chapitres 1 et 2, nous introduisons un marché centralisé, où une partie du carnet d’ordre est accessible (information publique). Dans le chapitre 3, nous développons un marché de gré à gré dans lequel les agents négocient et échangent avec leurs relations. / The piece of work’s aim is to understand information diffusion in financial markets. Starting from the empirical evidences that agents are heterogeneous and bounded rational, we based our investigations on a class of computational models for simulating the actions and interactions of autonomous agents: the agent - based model (ABM). More precisely, this research focuses on the impacts of agents heterogeneity in diffusion and use of information. For this purpose, we developed two market structures, in which the market transparency varies. In the chapters 1 and 2, we introduce a centralised market, where a part of the order-book is available as a public information. In the chapter 3, we build an Over-The-Counter market, where agents bargains with their trading contacts.

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.

The goal of my thesis is to verify the weak form of the efficiency of the exchange market. The paper results from the presumptions for efficient price movements on the financial markets. They are applied to the time series of exchange rates of five currency pairs. After definitions of testing methodology, the given exchange rates series are analysed with the help of correlation and autocorrelation test, runs test and a test based on technical analysis. The conclusion of the thesis anwers the question if the exchange rates movements are suitable with the efficient market hypothesis.

When companies go public, the shares they sell tend to be underpriced, and thus exhibit a significant price jump on the first day of trading. As a result, IPO investors materialize significant first-day returns. In the long-run, however, relative to some benchmark, investors appear to lose out by continuing to hold the stocks of firms that have recently gone public. These IPO phenomena are subject of the following study. The thesis addresses two main objectives. First, it systematically surveys relevant empirical evidence and theories that have been proposed to explain IPO underpricing and long-run underperformance. In addition, both anomalies are studied form the viewpoints of two competing finance theories: efficient market hypothesis and behavioral finance. Theories of underpricing are grouped within two broad categories: asymmetric information based models and behavioral theories. While asymmetric information based models assume that one of the IPO transaction parties knows more than others, and that these information frictions give rise to underpricing, behavioral explanations, on the other hand, assume the presence of irrational investors who are the prime cause of underpricing. Theories of poor long-term performance are based on behavioral finance perspective only, where "investor sentiment" plays the main role. On the contrary, proponents of market efficiency strongly argue that the notion of systematic IPOs long-run underperformance is spurious. Secondly, the thesis empirically examines the presence of underpricing and the long-performance of IPOs in European NYSE Euronext markets. In general, the results undoubtedly show that IPOs in the sample are moderately underpriced on average. However, the assessment of IPOs long-run performance provides contentious findings and probably requires further research.

The objective of the thesis is to characterize the importance of information and consequently also of knowledge as the bases for active dealing in the stock market. The fundamental terms of information credibility, disinformation and information asymmetry, which have a cardinal effect on behaviour of particular participants of the market, are mentioned in the thesis. The theory of effective markets and the factors due to which it is not able to explain the development and the real state of the contemporary stock markets, are analysed in more detail in the thesis. A considerable part of the thesis is devoted to the analysis and the definition of information need as a basic requirement for making successful investment decisions of an individual, whereas ways to its fulfilment are implied -- including a description and a division of available information sources. The description and the analysis of several dealing strategies which are directly based on usage of various kinds of information are not missing in the thesis. A part of the work is a presentation and an analysis of the results of a research made among real investors.

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.

The Diploma Thesis deals with influence of announcing economic indicators on currency exchange rate AUD/USD. The Thesis focuses on fundamental news announced in Australia, USA and China, as these play a significant role in forming of analyzed currency exchange rate. The first part includes general description of fundaments, explanation of investor's psychology, description of world's most important banks, because the financial world waits for their announcements and reacts upon them. Next subchapter of thesis focuses on central bank of Australia and its monetary policy. The research itself is situated in the second part of the thesis, containing testing the influence of fundamental news on logarithmic return of exchange rate AUD/USD, using linear regression analysis. The objective of this part is to find out what is the influence of news on exchange rate return of AUD/USD. The last part examines whether investing strategies based on announcing fundamental news can bring profit to the investor or the efficient market theory will be confirmed.