Bayesian Value at Risk Metrics for Equity Portfolios
17 Pages Posted: 5 Sep 2014 Last revised: 10 Mar 2017
Date Written: September 1, 2014
We develop a Bayesian framework for estimating high quantiles of the relative return loss distribution of equity portfolios. This framework allows for the incorporation of both quantitative data via a parametric model for the loss distribution as well as qualitative information, specified independent of the data, by the choice of a prior distribution over the model parameters. We apply these methods in the case of one and two dimensional models to estimate distribution parameters and associated error bounds from which 99% VaR values are estimated. Finally, we systematically apply our framework to four test portfolios, compute summary statistics related to model performance, and report the results.
Keywords: Bayesian Inference, Value at Risk, Burr Distribution
JEL Classification: C11
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