Univ., Diss.--Frankfurt (Main), 2003. / Literaturverz. S. [105] - 107.

Thesis (Ph. D.)--Catholic University of America, 1943. / Bibliography: p. 135-144.

Master-Arbeit Univ. St. Gallen, 2006.

Thesis (MComm (Mathematics))--University of Stellenbosch, 2007. / The word numéraire refers to the unit of measurement used to value a portfolio of assets. The change of numéraire technique involves converting from one measurement to another. The foreign exchange markets are natural settings for interpreting this technique (but are by no means the only examples). This dissertation includes elementary facts about the change of numeraire technique. It also discusses the mathematical soundness of the technique in the abstract setting of Delbaen and Schachermayer’s Mathematics of Arbitrage. The technique is then applied to financial pricing problems. The right choice of numéraire could be an elegant approach to solving a pricing problem or could simplify computation and modelling.

Le sujet principal de cette thèse est de proposer de nouvelles méthodes d'extractions de signaux avec applications en finance. Par signaux, nous entendons soit un signal sur lequel repose une stratégie d'investissement; soit un signal perturbé par un bruit, que nous souhaitons retrouver. Ainsi, la première partie de la thèse étudie la contagion en volatilité historique autours des annonces de résultats des entreprises du Nasdaq. Nous trouvons qu'autours de l'annonce, l'entreprise reportant ses résultats, génère une contagion persistante en volatilité à l’encontre des entreprises appartenant au même secteur. Par ailleurs, nous trouvons que la contagion en volatilité varie, selon le type de nouvelles reportées, l'effet de surprise, ou encore par le sentiment de marché à l'égard de l'annonceur. La deuxième partie de cette thèse adapte des techniques de dé-bruitage venant de l'imagerie, à des formes de bruits présentent en finance. Ainsi, un premier article, co-écrit avec Matthieu Garcin, propose une technique de dé-bruitage innovante, permettant de retrouver un signal perturbé par un bruit à variance non-constante. Cet algorithme est appliqué en finance à la modélisation de la volatilité. Un second travail s'intéresse au dé-bruitage d'un signal perturbé par un bruit asymétrique et leptokurtique. En effet, nous adaptons un modèle de Maximum A Posteriori, couramment employé en imagerie, à des bruits suivant des lois de probabilité de Student, Gaussienne asymétrique et Student asymétrique. Cet algorithme est appliqué au dé-bruitage de prix d'actions haute-fréquences. L'objectif étant d'appliquer un algorithme de reconnaissance de formes sur les extrema locaux du signal dé-bruité. / The main objective of this PhD dissertation is to set up new signal extraction techniques with applications in Finance. In our setting, a signal is defined in two ways. In the framework of investement strategies, a signal is a function which generates buy/sell orders. In denoising theory, a signal, is a function disrupted by some noise, that we want to recover. A first part of this PhD studies historical volatility spillovers around corporate earning announcements. Notably, we study whether a move by one point in the announcer historical volatility in time t will generate a move by beta percents in time t+1. We find evidences of volatility spillovers and we study their intensity across variables such as : the announcement outcome, the surprise effect, the announcer capitalization, the market sentiment regarding the announcer, and other variables. We illustrate our finding by a volatility arbitrage strategy. The second part of the dissertation adapts denoising techniques coming from imagery : wavelets and total variation methods, to forms of noise observed in finance. A first paper proposes an denoising algorithm for a signal disrupted by a noise with a spatially varying standard-deviation. A financial application to volatility modelling is proposed. A second paper adapts the Bayesian representation of the Rudin, Osher and Fatemi approach to asymmetric and leptokurtic noises. A financial application is proposed to the denoising of intra-day stock prices in order to implement a pattern recognition trading strategy.

L’essor de la finance islamique moderne va poser logiquement la question de la résolution des litiges. En effet, le recours à la justice étatique aboutit à des impacts négatifs sur la réalisation des objectifs de la finance islamique et sur le développement de ce secteur d’activité. Dans cette optique, l’application de la législation nationale par le juge étatique aboutit à la requalification des contrats de financement islamique en des contrats de financement conventionnel. En outre, ce recours au juge étatique conduit à la neutralisation de la Charia en tant que droit applicable. Tout cela conduit à la dénaturation de la finance islamique. Cette dénaturation est une source de contradictions. On sait bien que les institutions financières islamiques reposent sur une obligation fondamentale, selon laquelle toutes les opérations financières effectuées doivent être conformes à la Charia. De plus, les personnes ayant recours à la finance islamique visent principalement à exercer des activités financières en toute conformité avec leurs principes religieux et éthiques issus de la législation islamique. L’étude a également montré que les modes amiables de règlement des litiges contribuent à prendre en considération la particularité de la finance islamique. Cependant, cette prise en compte reste insuffisante. En effet, ces modes ne présentent pas un mécanisme complet, homogène et cohérent de règlement des litiges relatifs à la finance islamique. Leur contribution à la construction d’un système juridique propre à la finance islamique est très limitée. De ce fait, ils ne peuvent pas participer efficacement à la promotion de l’industrie financière islamique. De plus, ils souffrent d’un défaut majeur au niveau de la force de la solution proposée : l’efficacité de cette solution dépend en principe de la bonne volonté des parties. Face à ce dysfonctionnement de la justice étatique et des modes amiables, la solution a été recherchée du côté de l'arbitrage. En effet, l’arbitrage connaît une expansion spectaculaire dans le monde actuel au point de devenir le mode normal de règlement des litiges. Cet essor exceptionnel de l’arbitrage se constate notamment dans la vie économique et financière. A l’heure actuelle, cette vie est devenue inconcevable sans l’arbitrage. En matière de finance islamique, l’arbitrage en tant que mécanisme reposant sur la liberté et la volonté apparaît comme la meilleure voie permettant la prise en considération de la spécificité de cette activité, l’application de la Charia dans le domaine de la résolution des litiges. C’est pourquoi, ce mode alternatif de règlement des litiges s’adapte parfaitement aux exigences des litiges relatifs à la finance islamique et pourrait contribuer à la promotion de ce secteur d’activité. Grâce aux avantages qu’il offre aux opérateurs de la finance islamique, l’arbitrage s’affirme comme la justice naturelle des litiges relatifs à la finance islamique. Pour renforcer le rôle de l’arbitrage dans le domaine de la finance islamique, un projet de réforme a été présenté. Ce projet vise à moderniser l’arbitrage dans toutes ses étapes. Dans cette optique, l’accent a été mis sur la convention d’arbitrage, le statut de l’arbitre, le droit applicable et la sentence arbitrale. Tout cela a été achevé par l’élaboration d’un projet de charte éthique de l’arbitrage en matière de finance islamique. Une fois modernisé et renouvelé, l’arbitrage peut devenir un pilier essentiel de l’industrie financière islamique, en participant efficacement à la promotion de cette activité. Avec une justice équitable, pratique, efficace, conforme à la Charia et adaptée, la finance islamique se trouve renforcée et consolidée / AbstractThe rise of modern Islamic finance will logically raise the issue of dispute resolution. Indeed, recourse to state justice leads to negative impacts on the achievement of the objectives of Islamic finance and on the development of this sector of activity. In this context, the application of national legislation by the state judge results in the reclassification of Islamic financing contracts into conventional financing contracts. In addition, this recourse to the State Judge leads to the neutralization of Shariah as an applicable law. All this leads to the denaturation of Islamic finance. This denaturing is a source of contradictions. It is well known that Islamic financial institutions are based on a fundamental obligation that all financial transactions must conform to Sharia law. In addition, people who use Islamic finance primarily aim to conduct financial activities in accordance with their religious and ethical principles derived from Islamic legislation. The study also showed that amicable dispute resolution modes help to take into account the peculiarity of Islamic finance. However, this consideration remains insufficient. Indeed, these modes do not present a complete, homogeneous and coherent mechanism for resolving disputes relating to Islamic finance. Their contribution to the construction of a legal system specific to Islamic finance is very limited. As a result, they can not participate effectively in promoting the Islamic financial industry. In addition, they suffer from a major flaw in the strength of the proposed solution: the effectiveness of this solution depends in principle on the good will of the parties. Faced with this dysfunction of state justice and amicable modes, the solution was sought on the side of arbitration. Indeed, arbitration is expanding dramatically in today's world to the point of becoming the normal mode of dispute resolution. This exceptional growth of arbitration can be seen in particular in economic and financial life. At present, this life has become inconceivable without arbitration. In the area of Islamic finance, arbitration as a mechanism based on freedom and will appears as the best way to take into account the specificity of this activity, the application of Shari'a in the field of the resolution of litigation. For this reason, this alternative dispute resolution method is perfectly suited to the demands of Islamic finance litigation and could contribute to the promotion of this sector of activity. Thanks to the advantages it offers to operators of Islamic finance, arbitration is asserting itself as the natural justice of disputes relating to Islamic finance. To strengthen the role of arbitration in the field of Islamic finance, a reform project was presented. This project aims to modernize arbitration in all its stages. From this perspective, the focus was on the arbitration agreement, the status of the arbitrator, the applicable law and the arbitration award. All this has been completed by the elaboration of a draft ethical charter of arbitration on Islamic finance. Once modernized and renewed, arbitration can become an essential pillar of the Islamic financial industry, effectively participating in the promotion of this activity. With fair, practical, effective, Sharia-compliant and responsive justice, Islamic finance is strengthened and consolidated

La relation dialectique qui unit les traités bilatéraux d’investissement et la jurisprudence du Centre International de Règlement des Différends relatifs aux Investissements (CIRDI) a fait émerger un droit international des investissements. La rencontre de ces deux dynamiques a permis de dépasser leur caractère a priori isolé et fragmenté, pour aboutir à un véritable système juridique international, doté d’une structure, d’une logique et de principes propres. En effet, rien ne pouvait laisser envisager une telle évolution, le régime de l’investissement international se fondant sur une multitude de traités bilatéraux et sur une instance arbitrale ne faisant qu’héberger des tribunaux éphémères. Les mouvements de va-et-vient qui unissaient ces deux phénomènes ont permis de lui donner des normes quasi-universelles, mais aussi un véritable juge à la compétence extensive et surtout de lui insuffler l’unité, l’efficacité, la cohérence et la complétude, faisant de plus en plus ressembler le droit international des investissements à un véritable ordre juridique qui, même s’il relève du droit international, lui permet également d’évoluer. / The relashionship between bilateral investment treaties and the case-law of the International Centre for Settlement of Investment Disputes (ICSID) has led to the emergence of international investment law. It seems surprising, at first, that these two distinct phenomena, being isolated and fragmented, would reach a certain degree of unity so that a real international legal order could appear, with its own structure, reasoning and principles. No one could foresee such an evolution, the regime of international investment being founded on a large number of bilateral treaties and on an international institution which only provides facilities for arbitration of international investment disputes. The unity of the system has been discovered through the back and forth movements between treaties and arbitration which gave rise to international investment law. This system has now almost universal norms, an international judge and satisfies the criteria of unity, efficiency, consistency and completeness, producing a real legal order functioning in accordance with its own logic. There is no doubt that this evolution will influence the course of international law.

Submitted by Paula Andrea Soto (paulaandreasoto@hotmail.com) on 2016-09-05T12:30:23Z No. of bitstreams: 1 Paula Andrea Soto Dissertacao.pdf: 4060630 bytes, checksum: a38f57b1ee13eb3c036f96d824c204fe (MD5) / Approved for entry into archive by Renata de Souza Nascimento (renata.souza@fgv.br) on 2016-09-05T18:26:52Z (GMT) No. of bitstreams: 1 Paula Andrea Soto Dissertacao.pdf: 4060630 bytes, checksum: a38f57b1ee13eb3c036f96d824c204fe (MD5) / Made available in DSpace on 2016-09-05T18:28:40Z (GMT). No. of bitstreams: 1 Paula Andrea Soto Dissertacao.pdf: 4060630 bytes, checksum: a38f57b1ee13eb3c036f96d824c204fe (MD5) Previous issue date: 2016-08-11 / Ao modelar séries de preços de ativos financeiros, a prática usual é tomar a primeira diferença das séries, e trabalhar assim com retornos ou logretornos. Utilizando VECM (Vector Error Correction Models, em inglês), torna-se possível trabalhar diretamente com as séries sem diferenciar, o que possibilita o estudo de tendências comuns e cointegração. Este trabalho utiliza VECM para gerar estratégias de arbitragem estatística no mercado brasileiro de ações. Tendências comuns são identificadas por PCA (Principal Components Analysis, em inglês, ou análise de componentes principais, em português) e os resultados foram utilizados para definir portfólios cointegrados. Foram propostos dois métodos de geração de sinais para estratégias de trading do tipo longshort. Um total de cinco diferentes estratégias de trading foram simuladas e a existência de arbitragem estatística em cada caso foi testada pelo teste proposto em (JARROW et al., 2012). Conclui-se que, ao considerar séries de preços não diferenciadas, a metodologia abordada permite identificar e modelar candidatos de portfólios cointegrados. Quando bem calibradas, as estratégias testadas geram ganhos significativos em todos os portfólios. / Common practice for modelling stock prices is to use their differences in form of returns or logreturns. Using VECM (Vector Error Correction Models), it is possible to work with the series of prices without differentiation, which allows looking into common trends and cointegration. This work uses VECM to create trading strategies for the Brazilian stock market. Common trends are obtained using PCA (Principal Components Analysis) and prices are modelled using VECM. Five longshort-type trading strategies are simulated in diversified portfolios, and tested for statistical arbitrage using the test proposed by (JARROW et al., 2012). The methodology for identifying common trends and modelling prices allows for trading strategies with good results for all portfolios.

Submitted by Jerckns Cruz (jerckns@hotmail.com) on 2009-12-11T03:37:02Z No. of bitstreams: 1 tese_Jerckns Cruz.pdf: 208471 bytes, checksum: 6be3209c95745116ae6d8db9f6c2ea1b (MD5) / Approved for entry into archive by Gisele Gammaro(gisele.gammaro@fgv.br) on 2009-12-14T15:03:00Z (GMT) No. of bitstreams: 1 tese_Jerckns Cruz.pdf: 208471 bytes, checksum: 6be3209c95745116ae6d8db9f6c2ea1b (MD5) / Made available in DSpace on 2009-12-14T15:03:09Z (GMT). No. of bitstreams: 1 tese_Jerckns Cruz.pdf: 208471 bytes, checksum: 6be3209c95745116ae6d8db9f6c2ea1b (MD5) / The theory of Behavioral Finance emerges as a new approach to the financial market, arguing that some events are better explained if the restrictions of investor’s rationality are relaxed. Concepts of psychology and limits to arbitrage are used to model market inefficiencies, bringing up the idea that market can be systematically beaten. This paper proposes a new model, of simple implementation, to explore the abnormal returns from the momentum and mean reversion strategies simultaneously. The idea of a long term momentum effect stronger than the short term effect is introduced, but the empirical results show that the Brazilian market dynamics reject this concept. The model fails to achieve riskless positive returns. / A teoria de Finanças Comportamentais surge como uma nova abordagem ao mercado financeiro, argumentando que alguns eventos podem ser mais bem explicados se as restrições da racionalidade do investidor são relaxadas. Conceitos de psicologia e limites à arbitragem são usados para modelar as ineficiências, criando a idéia de ser possível ganhar sistematicamente do mercado. Este trabalho propõe um novo modelo, simplista na sua implementação, para aproveitar os retornos anormais advindos de estratégias de momentum e reversão à média simultaneamente. A idéia de um efeito momentum de longo prazo mais forte que o de curto prazo é introduzida, mas os resultados empíricos mostram que a dinâmica do mercado brasileiro rejeita este conceito. O modelo falha em conseguir retornos positivos e livres de risco.

Submitted by Alice Yang (yanglice@hotmail.com) on 2011-08-31T16:16:13Z No. of bitstreams: 1 Dissertação Versão Final - Alice Yang (Ago11).pdf: 213202 bytes, checksum: aafd91fefc95482e8137d9185fc59857 (MD5) / Approved for entry into archive by Gisele Isaura Hannickel (gisele.hannickel@fgv.br) on 2011-08-31T19:16:56Z (GMT) No. of bitstreams: 1 Dissertação Versão Final - Alice Yang (Ago11).pdf: 213202 bytes, checksum: aafd91fefc95482e8137d9185fc59857 (MD5) / Approved for entry into archive by Gisele Isaura Hannickel (gisele.hannickel@fgv.br) on 2011-08-31T19:17:18Z (GMT) No. of bitstreams: 1 Dissertação Versão Final - Alice Yang (Ago11).pdf: 213202 bytes, checksum: aafd91fefc95482e8137d9185fc59857 (MD5) / Made available in DSpace on 2011-08-31T19:36:01Z (GMT). No. of bitstreams: 1 Dissertação Versão Final - Alice Yang (Ago11).pdf: 213202 bytes, checksum: aafd91fefc95482e8137d9185fc59857 (MD5) Previous issue date: 2011-08-19 / This study seeks to assess the existence of long-run relationships between price series and how Portfolio Managers use pair trading strategy. A quantitative analysis of the Brazilian stocks is done based on Johansen and Cavaliere methodologies, whose null hypothesis assumes the nonexistence of cointegration between pairs. The results showed that there are few pairs that cointegrates among the price series analyzed, which reinforce the need to portray the strategy carefully while constructing a portfolio. / Este trabalho busca avaliar a existência de cointegração das ações do mercado brasileiro e a forma de utilização da estratégia de arbitragem estatística pelos gestores. Para isso, utilizou-se preços de ações brasileiras em diferentes frequências e janelas e aplicou-se a metodologia de Johansen e Cavaliere, cuja hipótese nula refere-se a não cointegração dos pares. Os resultados mostram que há poucas relações de cointegração entre as séries analisadas, o que ratifica a necessidade de cautela na forma de implantação da técnica na construção de carteiras.