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     <dc:title xml:lang="fr">Optimality of the Financial Decision and the Theory of American and Exotic Options</dc:title>
     <dcterms:alternative xml:lang="fr">Optimalité de la décision financière et théorie des options américaines et exotiques</dcterms:alternative>
     <dc:subject xml:lang="fr">Option Américaine</dc:subject><dc:subject xml:lang="fr">Strangles</dc:subject><dc:subject xml:lang="fr">Option Step</dc:subject><dc:subject xml:lang="fr">Prime d’exercice anticipé</dc:subject><dc:subject xml:lang="fr">Equation intégrale</dc:subject><dc:subject xml:lang="fr">Quadrature</dc:subject><dc:subject xml:lang="fr">Temps d’occupation</dc:subject><dc:subject xml:lang="fr">Bornes d’exercice multiple</dc:subject><dc:subject xml:lang="fr">Paramètres de gestion</dc:subject><dc:subject xml:lang="fr">Option réelle</dc:subject><dc:subject xml:lang="fr">Investissement en univers incertain</dc:subject><dc:subject xml:lang="fr">Valeur actuelle nette</dc:subject><dc:subject xml:lang="fr">Option d’abandon</dc:subject><dc:subject xml:lang="fr">Option d’expansion&#xD;
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     <dc:subject xml:lang="en">American option</dc:subject><dc:subject xml:lang="en">Strangles</dc:subject><dc:subject xml:lang="en">Step options</dc:subject><dc:subject xml:lang="en">Early exercise premium</dc:subject><dc:subject xml:lang="en">Integral equation</dc:subject><dc:subject xml:lang="en">Quadrature</dc:subject><dc:subject xml:lang="en">Occupation time</dc:subject><dc:subject xml:lang="en"> Multiple exercise boundaries</dc:subject><dc:subject xml:lang="en">Hedging parameters</dc:subject><dc:subject xml:lang="en">Real option</dc:subject><dc:subject xml:lang="en">Investment under uncertainty</dc:subject><dc:subject xml:lang="en">Net present value</dc:subject><dc:subject xml:lang="en">Abandonment option</dc:subject><dc:subject xml:lang="en">Expansion option&#xD;
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="192559559">Options (finances) -- Évaluation</tef:elementdEntree>
					</tef:vedetteRameauNomCommun><tef:vedetteRameauNomCommun>
						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="035303603">Options exotiques</tef:elementdEntree>
					</tef:vedetteRameauNomCommun><tef:vedetteRameauNomCommun>
						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027836177">Intégration numérique</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="093638868">Options réelles (finances)</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027241300">Processus stochastiques</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="02726209X">Investissements de capitaux</tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Cette thèse examine les décisions financières à travers la théorie des options Américaines et Exotiques. Dans un premier temps, nous avons présenté une revue de la littérature sur les options de type Américain. La tarification de l’option Américaine standard d’achat est revisitée en vue de fournir les pré-requis. Dans l’étape suivante, un nouveau type de contrat d’option, appelé Strangle Euro-American ou Strangle Hybride, a été introduit. Des formules analytiques ont été fournies pour leurs prix ainsi que leurs paramètres de gestion. Une nouvelle méthode est proposée pour calculer les intégrales qui définissent les bornes d’exercice anticipé. Il a été démontré que cette méthode est efficiente, précise et rapide pour la tarification de tous les types de Strangle voir au delà. Puis, nous avons examiné les options Step de type Américain. Nous avons démontré que les propriétés des options d’achat "vanille" ne s’appliquent pas aux Step dans certaines situations. Les formules d’évaluation et des paramètres de gestion ont été déterminés. Et enfin, nous avons considéré l’évaluation d’une firme détenant simultanément une option d’abandon et une option d’expansion de ses activités selon des conditions du marché (favorables ou défavorables). Les seuils critiques de décision ont été obtenus. Des formules analytiques pour la valeur de la firme ont été obtenues. Des simulations illustrent le comportement de ces seuils critiques de décisions anticipées.</dcterms:abstract>
     <dcterms:abstract xml:lang="en">This thesis investigates the financial decisions through the theory of American and Exotic options. First, the literature on American-style derivatives is surveyed. The pricing of standard American call option in the early exercise premium representation is addressed in order to provide prerequisites for what follows. Second, a new variant of Strangle contracts, called Euro-American or Hybrid Strangles, is introduced and priced. Analytical formulas are provided for the prices of all these option contracts as well as their hedging parameters. A new quadrature is proposed to account for the systems of coupled integral equations that locate the early exercise boundaries. It is shown to be efficient, accurate, and fast for pricing all types of early exercisable strangles and more. Third, we examines the valuation of American Step options contract. The structures of the immediate exercise regions of the various contracts are identified. Typical properties of American vanilla calls are shown to fail in some cases. Formulas for prices and hedging parameters, for the American Step options, are derived. Finally, we consider the valuation of a firm holding simultaneously an option to expand and to abandon productions depending on the state of the market (good or bad) in a real option framework. Optimal decision levels are obtained. Analytical formulas for the firm’s value are provided. Numerical results document the behavior of the firm’s value and optimal exercise boundaries levels.</dcterms:abstract>
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       <tef:nom>Laminou Abdou</tef:nom>
       <tef:prenom>Souleymane</tef:prenom>
       
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                        <dc:identifier xsi:type="tef:NNT">2016REN1G016</dc:identifier>
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