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En 2005 et au début 2006, plus de 50 milliards de dollars de créances ont été remboursés par anticipation par les débiteurs du Club de Paris. Modéliser ces rachats comme l’exercice d’options financières permet d’étudier l’intérêt et le coût de ce type d’opération.
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It is well-known that Gaussian hedging strategies are robust in the sense that they always lead to a cost process of bounded variation and that a superhedge is possible if upper bounds on the volatility of the relevant processes are available, cf. El Karoui, Jeanblanc-Picque and Shreve (1998)...
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