The impact of uncertainties on the pricing of contingent claims

Details The impact of uncertainties on the pricing of contingent claims The impact of uncertainties on the pricing of contingent claims

2010-01-28

arxiv.org/abs/1001.5202v1

Economy

Quantitative Finance

Pricing of Securities

Scientific paper

We study the effect of parameters uncertainties on a stochastic diffusion model, in particular the impact on the pricing of contingent claims, thanks to Dirichlet Forms methods. We apply recent techniques, developed by Bouleau, to hedging procedures in order to compute the sensitivities of SDE trajectories with respect to parameter perturbations. We show that this model can reproduce a bid-ask spread. We also prove that, if the stochastic differential equation admits a closed form representation, also the sensitivities have closed form representations. We exhibit the case of log-normal diffusion and we show that this framework foresees a smiled implied volatility surface coherent with historical data.

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