Applying hedging strategies to estimate model risk and provision calculation
AbstractThis paper introduces a relative model risk measure of a product priced with a given model, with respect to another reference model for which the market is assumed to be driven. This measure allows comparing products valued with different models (pricing hypothesis) under a homogeneous framework which allows concluding which model is the closest to the reference. The relative model risk measure is defined as the expected shortfall of the hedging strategy at a given time horizon for a chosen significance level. The reference model has been chosen to be Heston calibrated to market for a given time horizon (this reference model should be chosen to be a market proxy). The method is applied to estimate and compare this relative model risk measure under volga-vanna and Black-Scholes models for double-no-touch options and a portfolio of forward fader options.
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Bibliographic InfoPaper provided by arXiv.org in its series Papers with number 1102.3534.
Date of creation: Feb 2011
Date of revision: Oct 2012
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Web page: http://arxiv.org/
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