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La thèse comporte deux parties. Dans la première partie (Chapitres 1 et 2), un examen des déterminants des interventions officielles sur le marché des changes est proposée. Dans la second partie (Chapitres 3 et 4), c'est la problématique des interventions dites « secrètes » qui est étudiée. Chapitre 1: « Talks, financial operations or both » Ce chapitre propose une nouvelle approche aux fonctions de réaction permettant d’examiner, dans un même modèle, les déterminants des différents types d’interventions (les interventions effectives et les interventions orales). Le modèle permet de mieux comprendre les choix stratégiques des autorités (opérations financières ou simple politique de communication) et d’en évaluer le degré de substituabilité ou de complémentarité. Chapitre 2 : « The institutional organization underlying interventions » La structure institutionnelle sous-jacente au processus d’intervention (interactions entre le Ministère des finances et la banque centrale) est explicitement incorporée dans le modèle proposé dans ce chapitre. Cette approche permet d’évaluer, dans quelle mesure, le Ministère des finances (l’autorité responsable de la politique de change), en intervenant sur le marché, internalise les objectifs de la banque centrale(l’agent du Ministère pour l’implémentation des ordres d’intervention). Chapitre 3 : « The secrecy puzzle » Ce chapitre propose une évaluation empirique des différents arguments théoriques expliquant le recours aux interventions secrètes. Le travail repose sur l’examen économétrique d’une fonction de stratégie, dans laquelle, des déterminants relatifs à la décision d’intervenir secrètement d’une part et, d’autre part, des déterminants relatifs à la détection des interventions par le marché sont incorporés. Chapitre 4 : « A unified approach to interventions » Un modèle unique, permettant d’expliquer les trois étapes du processus d’intervention, est proposé dans ce chapitre. Ces trois étapes sont relatives (i) au choix d’intervenir, (ii) au choix d’intervenir de façon secrète et (iii) à la perception des interventions par le marché. Grâce à l’inclusion de déterminants spécifiques pour ces différentes étapes, cette approche multidimensionnelle permet d’appréhender leurs interrelations et, donc, de mieux comprendre les différents arbitrages réalisés par les autorités lorsqu’elles décident d’intervenir.

This paper analyzes the extent of foreign exchange rate exposure in Hong Kong, Japan and Singapore in both firm level and industry level in the period of January 1996 to January 2011 by regressing the stock return of a particular industry or firm on exchange rate changes while controlling for overall stock market movements. It is found that exchange rate movements do affect firm and industry value in a manner consistent with expectation and the extract of unexpected exchange rate changes from actual exchange rate changes have little influence on the testing results of exposure. It is also proved that exchange rate regime plays an irreplaceable role in drawing the structure of exchange rate exposure of a country.

Japanese monetary authorities used to employ various intervention techniques to adjust the level of the dollar/yen exchange rate and reduce its volatility. Application of the GARCH-in- mean model for estimation of the effect of these operations demonstrates that depreciating interventions reduced volatility effectively from 1995 until 2002. Frequent interventions of the small scale had a tendency to increase volatility during period 1991-1995. Foreign exchange interventions conducted by US Fed have increasing, means negative, effect, on the conditional variance. Frequent interventions of the great scale do not affect the volatility; it is determined mostly by the persistent level of the conditional variance from the latter periods. Recent interventions conducted by the Bank of Japan after the financial crisis do not show any considerable effect on both the volatility and the level of the exchange rate.

This paper investigates the effects of real exchange rate misalignment (REM) on economic growth in Kenya over the period 1964-2009. The real exchange rate misalignment is defined as the difference between the equilibrium exchange rate and the actual real exchange rate (RER). The equilibrium real exchange rate was obtained by using the purchasing power parity (PPP) approach. To this effect, the study examined the existence or absence of the cointegration between the REM and economic growth, using the autoregressive distributed lag (ARDL) bounds testing approach. The ARDL approach is employed to determine both the long-run and short-run dynamics of the model. The results suggest that no long-run relationship exists between economic growth and the REM in Kenya. The short-run model is then estimated, using the OLS (ordinary least squares) method. From this model, it is determined that trade openness has a positive impact on economic growth, while foreign aid has a negative impact on economic growth; and both are considered empirically significant. The inflation rate and REM both negatively impact economic growth, but are empirically insignificant. All variables corroborate the a priori expectations.

Diploma thesis is concerned with foreign exchange risk management in terms of international trade. It deals with types of foreign exchange rate risk (transaction exposure, economic exposure, translation exposure) and their influence on business activity. Diploma thesis also focuses on the possibility of future foreign exchange rate's prediction. The main part of the thesis is devoted to various methods of foreign exchange rate risk management. These methods are analysed under two main groups, internal methods and external methods. Under internal methods, following techniques are analysed: netting, matching, leading and lagging, currency diversification, choice of invoicing currency and pricing policy. External methods focus on the use of financial derivatives, specifically currency forwards, currency futures, currency option and currency swaps. Analysis of exchange rate risk management using financial derivatives is supported with illustrative examples.

Emerging insurance markets, have limited access to financial instruments that they can use to create common hedge(s) to manage foreign exchange risk. This is the first empirical study to focus on the limitations when modelling foreign exchange rate transaction exposure in emerging insurance markets. This work is based on the cash flow methodology proposed by Martin and Mauer (2003, 2005) in reference to banks, and employed by Li et al. (2009) when assessing US insurance companies. Some econometric methodological innovations have been introduced to study the limitations of modelling foreign exchange rate transaction exposure in emerging insurance markets. An extensive literature review is followed by a quantitative investigation, to answer the following research questions. 1) Is the foreign exchange transaction exposure, as measured by a fundamental (economic) method of modelling the interplay of foreign exchange rates with other economic variables, significant, for all Egyptian insurance companies? 2) Is the foreign exchange transaction exposure, as measured by a technical (statistical) way of modelling the interplay of foreign exchange rates with other economic variables, significant for all Egyptian insurance companies? 3) Is the exchange transaction exposure for the Egyptian insurance industry, as a whole, significant? Although the foreign exchange rate transaction exposure for the Egyptian insurance industry, as a whole, is insignificant (question3), the percentage of Egyptian insurers affected by foreign exchange rate transaction exposure in US dollars, estimated at the individual firm level, was found to be 22% (question 1) and 35% (question2) respectively.

O presente trabalho teve por objetivo investigar se há evidências de que o regime de política cambial brasileiro teria se alterado no pós-crise econômico-financeira internacional de 2008, além de captar insights acerca da eficácia dos instrumentos de intervenção recentemente aplicados sobre o mercado de moedas e acerca do poder explicativo dos fundamentos da taxa de câmbio. Três fatos estilizados do mercado de câmbio brasileiro incitam essa investigação. O primeiro deles encontra-se no histórico de mudanças de regime cambial do Brasil e das demais economias emergentes, as quais geralmente têm ocorrido em momentos de crises internacionais por impossibilidade dos governos em sustentar o regime vigente. O segundo assenta-se na dinâmica recente do real cuja variação tem se descolado da dinâmica das demais moedas commodities currencies. Por fim, o terceiro ponto está nas inovações recentes em política de intervenção das autoridades monetárias e fiscais visando à gestão da cotação da moeda com medidas tais como as modificações das alíquotas do IOF sobre operações cambiais. Para o alcance dos objetivos foi utilizado o modelo Markov Switching desenvolvido por Hamilton (1989) aplicado ao modelo estrutural de curto prazo para taxa de câmbio, no qual foram consideradas como variáveis explicativas os fundamentos e as intervenções na taxa de câmbio descritas na literatura atual. O modelo foi estimado com ambas as variáveis sujeitas a estados não observáveis, cujas probabilidades de ocorrência são geradas por um processo markoviano. Como resultado foi identificado que não há evidências representativas de modificação na dinâmica da taxa de câmbio no pós-crise que conduzam a interpretação de alteração no regime de política cambial adotado pelo Brasil. Verificou-se também que as intervenções das autoridades monetárias e fiscais não obtiveram eficácia em gerir ou direcionar a variação ou nível da moeda. Ademais, a aplicação do modelo de mudança de regime na série da taxa de câmbio permitiu compreender a sua dinâmica no período recente e o modo como os fundamentos e intervenção perdem e ganham influência na determinação da cotação ao longo dos ciclos da moeda. / This study seeks evidences of changes in the Brazilian foreign exchange rate regime after the international economic and financial crisis of 2008. Furthermore, captures insights on the effectiveness of the intervention measures recently applied on the currency market and the explanatory power of the fundamentals of exchange rates. Three particular facts of the Brazilian foreign exchange market stimulated this research. First, the historical changes of foreign exchange rate regimes in Brazil and other emerging economies. Generally, it has occurred in times of international crises due to the failure of governments to sustain the regime. Second, recent deviation of the Real, which has been detached from the dynamics of other commodities currencies. Finally, the third fact is the recent innovations on monetary and fiscal intervention policies by authorities in order to manage currency value, such as adjustments of IOF on foreign exchange transactions. This investigation uses Markov switching model, developed by Hamilton (1989), applied to the structural model for short-term exchange rate, considering the fundamentals and interventions on the exchange rate described in the current literature as explanatory variables. The model was estimated with both variables subjected to unobservable states, whose probabilities of occurrence are generated by a Markov process. As result, there is no significant evidence of changes in the dynamic of exchange rate in the post-crisis that explains changes in foreign exchange rate regimes adopted by Brazil. The intervention by monetary authorities was not efficient in managing or guiding the dynamic of foreign exchange rate. In addition, the application of the Markov switching model in the foreign exchange rate series allowed understanding the dynamics in recent periods and how fundamentals and interventions loses and gain influence in determining prices throughout the currency cycles.

O presente trabalho teve por objetivo investigar se há evidências de que o regime de política cambial brasileiro teria se alterado no pós-crise econômico-financeira internacional de 2008, além de captar insights acerca da eficácia dos instrumentos de intervenção recentemente aplicados sobre o mercado de moedas e acerca do poder explicativo dos fundamentos da taxa de câmbio. Três fatos estilizados do mercado de câmbio brasileiro incitam essa investigação. O primeiro deles encontra-se no histórico de mudanças de regime cambial do Brasil e das demais economias emergentes, as quais geralmente têm ocorrido em momentos de crises internacionais por impossibilidade dos governos em sustentar o regime vigente. O segundo assenta-se na dinâmica recente do real cuja variação tem se descolado da dinâmica das demais moedas commodities currencies. Por fim, o terceiro ponto está nas inovações recentes em política de intervenção das autoridades monetárias e fiscais visando à gestão da cotação da moeda com medidas tais como as modificações das alíquotas do IOF sobre operações cambiais. Para o alcance dos objetivos foi utilizado o modelo Markov Switching desenvolvido por Hamilton (1989) aplicado ao modelo estrutural de curto prazo para taxa de câmbio, no qual foram consideradas como variáveis explicativas os fundamentos e as intervenções na taxa de câmbio descritas na literatura atual. O modelo foi estimado com ambas as variáveis sujeitas a estados não observáveis, cujas probabilidades de ocorrência são geradas por um processo markoviano. Como resultado foi identificado que não há evidências representativas de modificação na dinâmica da taxa de câmbio no pós-crise que conduzam a interpretação de alteração no regime de política cambial adotado pelo Brasil. Verificou-se também que as intervenções das autoridades monetárias e fiscais não obtiveram eficácia em gerir ou direcionar a variação ou nível da moeda. Ademais, a aplicação do modelo de mudança de regime na série da taxa de câmbio permitiu compreender a sua dinâmica no período recente e o modo como os fundamentos e intervenção perdem e ganham influência na determinação da cotação ao longo dos ciclos da moeda. / This study seeks evidences of changes in the Brazilian foreign exchange rate regime after the international economic and financial crisis of 2008. Furthermore, captures insights on the effectiveness of the intervention measures recently applied on the currency market and the explanatory power of the fundamentals of exchange rates. Three particular facts of the Brazilian foreign exchange market stimulated this research. First, the historical changes of foreign exchange rate regimes in Brazil and other emerging economies. Generally, it has occurred in times of international crises due to the failure of governments to sustain the regime. Second, recent deviation of the Real, which has been detached from the dynamics of other commodities currencies. Finally, the third fact is the recent innovations on monetary and fiscal intervention policies by authorities in order to manage currency value, such as adjustments of IOF on foreign exchange transactions. This investigation uses Markov switching model, developed by Hamilton (1989), applied to the structural model for short-term exchange rate, considering the fundamentals and interventions on the exchange rate described in the current literature as explanatory variables. The model was estimated with both variables subjected to unobservable states, whose probabilities of occurrence are generated by a Markov process. As result, there is no significant evidence of changes in the dynamic of exchange rate in the post-crisis that explains changes in foreign exchange rate regimes adopted by Brazil. The intervention by monetary authorities was not efficient in managing or guiding the dynamic of foreign exchange rate. In addition, the application of the Markov switching model in the foreign exchange rate series allowed understanding the dynamics in recent periods and how fundamentals and interventions loses and gain influence in determining prices throughout the currency cycles.

This thesis describes hedging transactions against foreign exchange rate risk which is a significant problem for a number of domestic companies trading with foreign partners. The objective of this paper is to characterize possible ways to eliminate or minimize a foreign exchange rate risk and to assess effects on economic results and liquidity of the company arising from the use of hedging instruments compared to the situation without hedging transactions. The practical analysis is shown on two Czech companies exposed to a foreign exchange rate risk. The analysis is focused on currency forwards negotiated with the bank and natural hedging in connection with an application of a hedge accounting.