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Measures of Model Risk in Continuous-time Finance Models

Emese Lazar, Shuyuan Qi and Radu Tunaru

Papers from arXiv.org

Abstract: Measuring model risk is required by regulators on financial and insurance markets. We separate model risk into parameter estimation risk and model specification risk, and we propose expected shortfall type model risk measures applied to Levy jump models and affine jump-diffusion models. We investigate the impact of parameter estimation risk and model specification risk on the models' ability to capture the joint dynamics of stock and option prices. We estimate the parameters using Markov chain Monte Carlo techniques, under the risk-neutral probability measure and the real-world probability measure jointly. We find strong evidence supporting modeling of price jumps.

Date: 2020-10, Revised 2020-10
New Economics Papers: this item is included in nep-ias and nep-rmg
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