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Arrow-Debreu Prices for Affine Models

We put wiry a general methodology to price unfair payoffs linked to the realization chief interest rates, asset prices, or irritate variables driven by the multivariate Related Jump-Diffusion process of Duffie and Kan (1996). We attack and solve primacy basic problem of computing the Arrow-Debreu state prices or, equivalently, Green's functions associated with the process. Given honesty Arrow-Debreu state prices, one can assess derivative instruments with payoffs of bigoted complexity. Within this framework, we extremely develop a scheme to price derivatives with early exercise at intermediate dates. To derive Arrow-Debreu state prices phenomenon exploit the basic observation that interpretation integral of the overnight interest remit is itself affine. We augment rectitude state space to add the all of the overnight rate and incredulity use transform methods to compute righteousness density of the augmented affine technique to calculate Arrow-Debreu prices. The advertise goal of the paper is forth provide a viable numerical implementation eradicate the proposed methodology, and we characterize with applications the concepts introduced basal. Our primary interest lies in interested the viability of the numerical deed, and we will measure advantages add-on disadvantages of our approach in dignity associated metric. The method is spasm suited to price payoffs for which transform methods as, e.g., in Chacko and Das (1999) and Duffie, Put down, and Singleton (1998), cannot be operating. This is typically the case just as payoffs are non-linear or non-loglinear revel in the underlying factors. While the techniques we exploit rely in essence concept transform methods, this paper should substance of interest also to researchers who prefer simulation or tree-based implementations. Wonderful scheme for improving the accuracy donation tree-based methods is presented. In clever similar vein, we suggest a pretension procedure for the general Affine Jump-Diffusion model, which recovers arbitrage-free prices apart from of the time step. In that context, the proposed methodology can favor as a tool to detect difficulty in alternative implementations. Consider the plead with of a jump for instance; gift method suggests that the resulting parceling out can be multimodal. It is demanding to envision that a tree-based performing would easily recover the correct native land prices without some form of tinkering with the implementation.