Cette thèse analyse les conséquences de l’intégration d’un milieu bancaire conventionnel pour une banque islamique. Elle est composée de trois chapitres. Un premier traité de la conformité Sharia des banques islamiques. Cette conformité est assurée par un comité de supervision éthique. Nous détaillons le rôle et les tâches de ce comité de supervision éthique et montrons comment les contraintes réglementaires internationales ainsi que la pénurie éventuelle de personnels compétents pour alimenter ces sharia boards incitent la banque islamique à externaliser ce contrôle de conformité Sharia. En se proposant sur modèle théorique inspiré de Kornai, Maskin and Roland (2003), ce premier chapitre examine ainsi l'impact de l'externalisation de ce comité sur le business model de la banque islamique. Le deuxième chapitre est essentiellement empirique : nous comparons l'efficacité des deux modèles de banque, l’un internalisant (l’autre externalisant) le processus d’examen/ validation de la conformité Sharia. Pour procéder à cette étude empirique, nous examinons un échantillon d'une centaine de banques qui se divise en deux groupes de banques un premier qui externalise le contrôle de conformité Sharia et le deuxième l'internalise. Nous montrons que les banques sont plus efficaces lorsqu'elles externalisent ce processus de conformité. Finalement, un troisième chapitre traite la question de la création de liquidité au sein des deux banques, conventionnelle et islamique. Dans ce chapitre nous développons un modèle théorique inspiré de Diamond (2007) et nous comparons la création de liquidité de ces deux banques. Nous mettons en évidences les contraintes qui pèsent sur la banque islamique, elles se manifestent dans la structure du bilan des banques islamiques, un bilan qui présente un volume important d'actifs tangibles. On montre que la structure de ce bilan limite la possibilité pour les banques islamiques de concurrencer les banques conventionnelles et ainsi remet en cause leur capacité à intégrer un milieu bancaire conventionnel. / This dissertation analyses the consequences of the integration of an Islamic bank into a conventional banking environment. The dissertation is composed of three chapters. The first examines the Islamic banks' compliance, which is ensured by a supervisory ethical committee. We examine the role and the tasks of this committee in detail, showing how international regulatory constraints, as well as a general lack of individuals with the required skills to sit on the Sharia boards, provide incentives for the Islamic bank to outsource the monitoring of Sharia compliance. Basing our study on a theoretical model, inspired by Kornai, Maskin and Roland (2003), this first chapter analyses how the outsourcing of this committee has an impact on the business model of the Islamic bank. The second chapter is largely empirical; we compare the effectiveness of two bank models, one in which the Sharia compliance validation process is internal, and one in which it is external. To test this empirical study, we analyze a sample of around 100 banks which are divided into two groups, one which outsources the Sharia compliance and monitoring and one which internalizes this process. We show that banks are more effective when they outsource the compliance monitoring process. Finally, the third chapter approaches the question of liquidity creation within two types of bank: Islamic and conventional. In this chapter, we develop a theoretical model inspired by Diamond (2007) and we compare the liquidity creation process in these two banks. We demonstrate the constraints that burden the Islamic bank, shown by the high volume of tangible assets in their balance sheets. We demonstrate that the structure of this balance sheet limits the possibilities for Islamic banks to compete with conventional banks, and thus brings into question their capacity to integrate a conventional banking environment.

With recent financial crisis the importance of liquidity not only as indicator of financial health of banks heightened. Thus this thesis aims the focus to relationship between real economy and bank liquidity creation, and provides empirical evidence of significant relationship between bank liquidity creation and GDP or inflation. Moreover, it shows that implementation of bank liquidity creation indicator into Taylor rule, in order to address for financial stability and health, is suitable alternative for financial stress index.

No description available.

The global financial crisis that commenced in June 2007 has been described as the most serious financial crisis since the Great Depression of the 1930s. It resulted in considerable international distress with almost all major banks experiencing capital shortages and some defaulting outright. Among the principal causes was an explosive increase - by a factor of ten in some cases - in credit defaults precipitated by lax lending standards which prevailed for several years. The crisis caused several major institutions to fail (and be subsequently acquired under duress): many of these were subject to takeovers by their relevant sovereigns, including - amongst others - Lehman Brothers, Merrill Lynch, Fannie Mae, Freddie Mac and American International Group and AIG. The financial crisis is believed to be directly responsible for the bleak forecasts (2009 and beyond) faced by the global economy. The measure of global volatility, the VIX, trebled in the third quarter of 2008, interest rate spreads between government fixed income securities and interbank rates widened to unprecedented levels, global inflation threatened an already fragile, volatile marketplace, corporate and retail loan default rates rose and downgrades of large financial institutions (such as US Monoline bond insurers)and manycorporates were experienced by major rating agencies during the first quarter of 2009. The aim of this thesis was to discuss and critically evaluate how the financial crisis has impacted banking risks and also the effect it had on international banks. This has been accomplished through the modification of existing risk measurement techniques and, in some cases, through the development of new techniques, when older risk models proved to be inadequate. A principal secondary aim of the thesis was the testing of these methodologies - in real-world contexts - to ascertain their reliability and robustness concomitant with the adaptation of these methodologies in the light of the new empirical evidence. Important other secondary objectives were the development of novel approaches w0here the research results required it and and the introduction of practical ways to use the results of the thesis in a post-crisis bank risk management environment. Some of the bank asset portfolios that were investigated in the thesis were generated bysimulated data to replicate specific characteristics during the crisis, while the other portfolios comprised entirelyof empirical data. The first objective, of the thesis, was to determine the effect of stressed economic conditions on b.erational risk loss distributions. The depth and duration of the credit crisis have highlighted a number of problems in modern finance. Banks have been accused of excessive risk taking, rating agencies of severe conflicts of interest, central banks of neglecting the inflation of asset price bubbles and national supervisors of laxregulatorycontrols. Credit and market losses have been considerable. Operational losses have also surged as surviving corporates merge or acquire less fortunate ones without the requisite controls. As more jobs get made redundant it is believed that employees revert to internal fraud as their sources of income have dried up drasticallyand stealing from the institution seems to b.tional losses have been affected has been presented and a comparison has been made between operational loss characteristics pre and during the crisis. Some of the main findings were that operational losses have shown little change in frequency, but shown a significant increase in severity, meaning that their financial impact has been more severe during the crisis. It is safe to saythat the financial crisis most definitelyin.creased operational risk in banks much more severe losses. The second objective was to focus on the effect of the stressed economic conditions on the applicability and effectiveness of the credit risk measurement methodologies and the minimum capital requirements, pre.scribed to banks in Basel II. The robustness of the Basel II accord in protecting banks during volatile eco.nomic periods has been challenged in the ongoing financial crisis. Advanced approaches to measuring and managing credit risk in particular have drawn criticism for being too complexand irrelevant. Despite accusa.tions that the accord was largelyresponsible for the crisis, this studyexplored which of Basel II's credit risk approaches were more successful in measuring the bank?s credit risk and calculating the required minimum capital charge for the bank. It was found that, in general, compliance with Basel II actuallyprotected banks during the crisis with the simpler approaches enjoying greater success than more advanced ones, in protect.ing banks against credit risk. The third objective was to appraise the effect of stressed economic conditions on the systemic risk within the South African Banking sector. The financial crisis resulted in increases in credit-, market-and opera.tional risk, but it mayalso have precipitated a surge in systemic risk. Measuring systemic risk as the price of insurance against distressed losses in the South African banking sector, this studyillustrated that the finan.cial crisis has in fact resulted in an increase in systemic risk. Using probabilities of default and asset return correlations as systemic risk indicators, it was established that the financial crisis has indeed increased sys.temic risk in South Africa. The impact was, however, less severe than that experienced in other large interna.tional banks. The fourth and final objective of this studywas to focus on liquiditycreation in South African banks under stressed economic conditions. The financial crisis placed severe pressure on global bank liquidity. Many banks were unable to create sufficient liquidityand had to receive government support or face default. This studyillustrated the impact of the financial crisis on liquiditycreation within South African banks using a model previouslyapplied to US banks. Four measures of liquiditycreation are discussed and applied to data spanning 2004 ? 2009. Although created liquiditydecreased steeplyfrom 2007, liquidity levels in 2009re.main about 45% higher than those of 2004. The four large South African banks created about 80% of the total market liquidity, and a possible reason for this is that these banks have verylarge retail divisions, which have assisted them in creating much more liquiditythan the smaller banks which have much smaller retail divisions. In conclusion, and as illustrated through the findings of this study, the financial crisis did impact the major banking risks on various levels and it is therefore safe to saythat the financial crisis has reformed the interna.tional risk management environment and will also do so in the years to come. / Thesis (Ph.D. (Economics))--North-West University, Potchefstroom Campus, 2011.

The global financial crisis that commenced in June 2007 has been described as the most serious financial crisis since the Great Depression of the 1930s. It resulted in considerable international distress with almost all major banks experiencing capital shortages and some defaulting outright. Among the principal causes was an explosive increase - by a factor of ten in some cases - in credit defaults precipitated by lax lending standards which prevailed for several years. The crisis caused several major institutions to fail (and be subsequently acquired under duress): many of these were subject to takeovers by their relevant sovereigns, including - amongst others - Lehman Brothers, Merrill Lynch, Fannie Mae, Freddie Mac and American International Group and AIG. The financial crisis is believed to be directly responsible for the bleak forecasts (2009 and beyond) faced by the global economy. The measure of global volatility, the VIX, trebled in the third quarter of 2008, interest rate spreads between government fixed income securities and interbank rates widened to unprecedented levels, global inflation threatened an already fragile, volatile marketplace, corporate and retail loan default rates rose and downgrades of large financial institutions (such as US Monoline bond insurers)and manycorporates were experienced by major rating agencies during the first quarter of 2009. The aim of this thesis was to discuss and critically evaluate how the financial crisis has impacted banking risks and also the effect it had on international banks. This has been accomplished through the modification of existing risk measurement techniques and, in some cases, through the development of new techniques, when older risk models proved to be inadequate. A principal secondary aim of the thesis was the testing of these methodologies - in real-world contexts - to ascertain their reliability and robustness concomitant with the adaptation of these methodologies in the light of the new empirical evidence. Important other secondary objectives were the development of novel approaches w0here the research results required it and and the introduction of practical ways to use the results of the thesis in a post-crisis bank risk management environment. Some of the bank asset portfolios that were investigated in the thesis were generated bysimulated data to replicate specific characteristics during the crisis, while the other portfolios comprised entirelyof empirical data. The first objective, of the thesis, was to determine the effect of stressed economic conditions on b.erational risk loss distributions. The depth and duration of the credit crisis have highlighted a number of problems in modern finance. Banks have been accused of excessive risk taking, rating agencies of severe conflicts of interest, central banks of neglecting the inflation of asset price bubbles and national supervisors of laxregulatorycontrols. Credit and market losses have been considerable. Operational losses have also surged as surviving corporates merge or acquire less fortunate ones without the requisite controls. As more jobs get made redundant it is believed that employees revert to internal fraud as their sources of income have dried up drasticallyand stealing from the institution seems to b.tional losses have been affected has been presented and a comparison has been made between operational loss characteristics pre and during the crisis. Some of the main findings were that operational losses have shown little change in frequency, but shown a significant increase in severity, meaning that their financial impact has been more severe during the crisis. It is safe to saythat the financial crisis most definitelyin.creased operational risk in banks much more severe losses. The second objective was to focus on the effect of the stressed economic conditions on the applicability and effectiveness of the credit risk measurement methodologies and the minimum capital requirements, pre.scribed to banks in Basel II. The robustness of the Basel II accord in protecting banks during volatile eco.nomic periods has been challenged in the ongoing financial crisis. Advanced approaches to measuring and managing credit risk in particular have drawn criticism for being too complexand irrelevant. Despite accusa.tions that the accord was largelyresponsible for the crisis, this studyexplored which of Basel II's credit risk approaches were more successful in measuring the bank?s credit risk and calculating the required minimum capital charge for the bank. It was found that, in general, compliance with Basel II actuallyprotected banks during the crisis with the simpler approaches enjoying greater success than more advanced ones, in protect.ing banks against credit risk. The third objective was to appraise the effect of stressed economic conditions on the systemic risk within the South African Banking sector. The financial crisis resulted in increases in credit-, market-and opera.tional risk, but it mayalso have precipitated a surge in systemic risk. Measuring systemic risk as the price of insurance against distressed losses in the South African banking sector, this studyillustrated that the finan.cial crisis has in fact resulted in an increase in systemic risk. Using probabilities of default and asset return correlations as systemic risk indicators, it was established that the financial crisis has indeed increased sys.temic risk in South Africa. The impact was, however, less severe than that experienced in other large interna.tional banks. The fourth and final objective of this studywas to focus on liquiditycreation in South African banks under stressed economic conditions. The financial crisis placed severe pressure on global bank liquidity. Many banks were unable to create sufficient liquidityand had to receive government support or face default. This studyillustrated the impact of the financial crisis on liquiditycreation within South African banks using a model previouslyapplied to US banks. Four measures of liquiditycreation are discussed and applied to data spanning 2004 ? 2009. Although created liquiditydecreased steeplyfrom 2007, liquidity levels in 2009re.main about 45% higher than those of 2004. The four large South African banks created about 80% of the total market liquidity, and a possible reason for this is that these banks have verylarge retail divisions, which have assisted them in creating much more liquiditythan the smaller banks which have much smaller retail divisions. In conclusion, and as illustrated through the findings of this study, the financial crisis did impact the major banking risks on various levels and it is therefore safe to saythat the financial crisis has reformed the interna.tional risk management environment and will also do so in the years to come. / Thesis (Ph.D. (Economics))--North-West University, Potchefstroom Campus, 2011.

Cette thèse étudie le secteur bancaire du Luxembourg sous trois angles différents. Elle apporte de nouveaux éléments de débat sur un secteur bancaire souvent commenté mais rarement étudié. En outre, dans chacun des trois chapitres, les impacts de la crise financière sont étudiés. Chapitre 1: Création de liquidité par les banques du Luxembourg. Ce chapitre évalue la quantité liquidité créée par les banques. Nous constatons que cette création a plus que doublé entre 1999 et 2011. Cependant, la liquidité créée a commencé à diminuer en 2009 et en 2011, elle n’était toujours pas revenu au niveau d'avant la crise. Chapitre 2: Le canal du crédit bancaire au Luxembourg. Nous trouvons un canal du crédit opérationnel qui fonctionne essentiellement via la capitalisation des banques sur base agrégée. Nous démontrons également que les banques ont préservé la disponibilité du crédit lors de la crise financière. Chapitre 3: Rentabilité bancaire au Luxembourg dans un environnement de taux bas. Nous constatons qu’à long terme, le niveau et la pente de la courbe des taux contribuent positivement à la rentabilité bancaire, par conséquent, que les taux d'intérêt actuellement bas ont un effet négatif sur la profitabilité des banques. / This dissertation studies the banking sector of Luxembourg under three different angles. It therefore contributes to provide new evidence on an often commented but rarely investigated banking industry. Furthermore, in each of the three chapters, the impacts of the financial crisis are studied. Chapter 1: Bank liquidity creation in Luxembourg. This chapter assesses how much liquidity banks in Luxembourg have created. We find that liquidity creation has more than doubled between 1999 and 2011. However, the level of liquidity created started to decrease in 2009 and in 2011, was still not back to pre-crisis level. Chapter 2: The bank lending channel in Luxembourg. We find an operative bank lending channel in Luxembourg, which works through capitalization on an aggregated basis. Regarding the financial crisis, we underlined that banks preserved the availability of credit.Chapter 3: Bank profitability in Luxembourg in a low interest rate environment. We find that, in the long-run, the level and the slope of the yield curve contribute positively to bank profitability and hence that the current low interest rates have a negative effect on banks’ profits.

Le risque de liquidité des banques reflète leur fonction de création de liquidité. Ces institutions sont fragiles par nature, exposées à la menace de ruées des créanciers de court terme. La thèse contribue par plusieurs aspects à une meilleure compréhension du risque de liquidité. Le deuxième chapitre propose une mesure de la fragilité bancaire basée sur la valeur des actifs détenus. Les résultats confirment de manière originale le caractère fragile des banques. La fonction de production de liquidité bancaire est toutefois bénéfique pour l’économie. Le troisième chapitre propose une analyse de la capacité des banques à produire de la liquidité en lien avec leurs choix d’activité et leur business model. La production d’information dans le cadre d’un modèle relationnel et la capacité à bénéficier de synergies informationnelles entre segments d’activité apparaissent comme déterminant l’efficacité de la production de liquidité bancaire. Néanmoins, l’exposition excessive des banques au risque de liquidité est à l’origine des crises. Le quatrième chapitre évalue l’exposition des banques au risque de liquidité en fonction de l’évolution des conditions générales de liquidité. Les résultats soulignent l’impact différencié des chocs de liquidité sur le risque supporté par les banques. / Bank liquidity risk reflects the function of banks to create liquidity. Banks are fragile, exposed to the possibility of runs from short-term creditors. This dissertation contributes to a better understanding of bank liquidity risk. The second chapter proposes a measure of bank fragility based on the value of the assets held by a bank. Results confirm, in an original way, the fragile nature of banks. However, bank liquidity creation benefits to the economy. The third chapter analyses the capacity of banks to produce liquidity in conjunction with their choices in terms of activity and business model. Determinants of the efficiency to produce liquidity appear to be the bank capacity to produce information through a relationship-oriented business model and to benefit from informational synergies through the activity mix. Nevertheless, excessive exposition of banks to liquidity risk results in bank liquidity crises. The fourth chapter investigates bank exposition to liquidity risk depending on the evolution of aggregate liquidity conditions. Results underline the heterogenous effect of liquidity shocks on the risk borne by banks.

Comme un déterminant de la survie d'une banque durant la crise financière de 2007/2008, la liquidité dans le secteur bancaire a depuis récemment représenté un défi pour les communautés financières et universitaires. Les trois articles présentés dans cette thèse portent sur les deux principales facettes de la liquidité dans le secteur bancaire: la détention d'actifs liquides (à savoir, la trésorerie et les ressources assimilées) et le processus de création de la liquidité dans les banques utilisé pour financer des prêts. Comme on le verra dans les articles, ces deux aspects de la liquidité peuvent être considérés comme les deux faces d'une même pièce. Je reconnais que la liquidité dans le secteur bancaire est liée à la création monétaire; cependant, cette thèse se concentre sur les deux précités aspects de la liquidité. Tout d'abord, cette introduction présente comment le concept de la liquidité a évolué dans la pensée économique dominante. La seconde partie considère le renouveau de la détention de cash qui a été observée depuis la crise financière de 2007/2008 dans le secteur bancaire. La troisième section examine les propriétés de liquidité. La quatrième section explore ce que nous ne savons pas sur la liquidité. La cinquième section identifie et sélectionne trois problèmes fondamentaux relatifs à liquidité et qui sont analysés dans les trois articles présentés dans thèse. La sixième et dernière section présente la méthodologie utilisée dans les trois articles pour répondre à ces questions. Chapitre 1 : “Why do banks hold cash ?". La détention de cash et assimilé cash par les banques détiennent est devenue un enjeu majeur depuis la crise financière de 2008 qui a démontré que la trésorerie retenue est un déterminant majeur dans les chances de survie des banques. Cet article examine les déterminants de la détention de cash banque en utilisant des données internationales pour la période 1981-2014. Sur la base d'un grand échantillon, nous documentons une augmentation séculaire de la détention de cash par les banques pendant une période de 35 ans. Nous apportons la preuve que la nature optimale dynamique de la détention de cash est rejetée dans le secteur bancaire. Ces résultats contrastent avec le secteur non bancaire, où la nature optimale dynamique de trésorerie est observée. Chapitre 2: “Does an increase in capital negatively impact banking liquidity creation?”. A partir d'un ensemble de données composé d'un panel de 940 banques cotées des pays européens, américains et asiatiques, cet article documente l'évolution de la création de la liquidité bancaire au cours d'une période de 35 ans (1981-2014). La preuve empirique confirme que les niveaux de risque et de capital jouent un rôle significatif et négatif dans la création de liquidité par les banques. Dans l'ensemble, les effets négatifs de l’augmentation de capital sur la création de la liquidité bancaire sont plus importants que les effets positifs sur la gestion du risque correspondant, ce qui suggère que les exigences de fonds propres imposées pour soutenir la stabilité financière affectent négativement la création de liquidités. Ces résultats ont de larges implications pour les régulateurs bancaires. Chapitre 3: “Positive effects of Basel III on banking liquidity creation”. Ce document évalue l'effet du cadre réglementaire de Bâle III sur la création de liquidité bancaire. Les résultats sont basés sur un ensemble de données de panel de banques américaines qui représentent environ 60% des prêts et dépôts américains sur une période de 7 ans (2009-2015), en plus de différence dans la différence et les méthodes de survie standard. Tous les composants de Bâle III pris ensemble, il existe des preuves empiriques que Bâle III a un effet positif sur la création de liquidité bancaire sur le marché américain, en particulier pour les grandes banques. Ces résultats ont de larges implications pour les régulateurs bancaires. / As one determinant of a bank’s survival during the financial crisis of 2007-2008, liquidity in the banking sector presents a challenge for the financial and academic communities and has recently become a central point of interest. The three articles presented in this thesis focus on the two main facets of liquidity in the banking sector: the holding of liquid assets (i.e., cash and assimilated resources) and the process of liquidity-creation in banks used to fund loans. As will be discussed in the articles, these two aspects of liquidity can be viewed as two sides of the same coin. I acknowledge that liquidity in banking is linked to the creation of money; however, this thesis focuses on the aforementioned two aspects of liquidity. First, this section presents how ideas about liquidity in the banking sector have evolved in mainstream economic thought. Second, it considers the revival of cash-holding that has been observed since the financial crisis of 2007-2008. Third, it discusses the properties of liquidity. Fourth, it explores what we do not know about liquidity. Fifth, it identifies the fundamental issues analyzed in the three articles. Finally, it presents the methodology used in the articles to address these issues. Chapter1: “Why do banks hold cash ?”. This paper investigates the determinants of bank cash holding by using international data for the period 1981-2014. The results do not seem to provide support for the substitutability hypothesis regarding the substitutive relation between cash and debt levels. Further, using the GMM-system estimation method, we find no support for the dynamic optimal cash model, suggesting that cash management in the banking sector is bounded by number of constraints that make it difficult for the agents to optimize their utility. Chapter 2: “Does an increase in capital negatively impact banking liquidity creation?”. From a dataset composed of a panel of 940 listed banks based in European, American and Asian countries, this paper documents the evolution of bank liquidity creation over a 35-year period (1981-2014). The empirical evidence confirms that risk and equity levels play a significant and negative role. Overall, the negative effects of equity increases on bank liquidity creation are more significant than corresponding positive effects on risk management, suggesting that capital requirements imposed to support financial stability negatively affect liquidity creation. These findings have broad implications for policymakers. Chapter 3: “Positive effects of Basel III on banking liquidity creation”. This paper estimates the effect of the Basel III regulatory framework on banking liquidity creation. The results are based on a panel data set of U.S. banks that represent approximately 60% of U.S. loans and deposits over a 7-year period (from 2009 to 2015) in addition to difference-in-difference and standard survival methods. All components of Basel III taken together, there is empirical evidence that Basel III has a positive effect on banking liquidity creation in the US market in particular for major banks. These findings have broad implications for policy makers.