The EDHEC Stress testing engine provides a tool for analysing complex financial scenarios in a coherent, intuitive yet mathematically rigorous way. The underlying methodology is based on the Bayesian Net technology. In the application a number of economically and financially relevant scenarios will be analysed, and the impact of the root causes propagated via a number transmission channels to a number of reference asset prices. The joint probabilities attaching to various configurations of asset prices will then be obtained. These outputs can then be used for stress-testing, portfolio construction, transactional analysis, and, in general, for all applications where the impact of user-defined shocks (economic, geo-political, etc) is of interest. Sensitivity analysis of the outputs and what-if analysis can be easily carried out.
A publication offering a novel way to apply the well-established Bayesian-net methodology to the important problem of asset allocation under conditions of market distress or, more generally, when an investor believes that a particular scenario (such as the break-up of the Euro) may occur.
Authors: Riccardo Rebonato, Alexander Denev
In Coherent Stress Testing: A Bayesian Approach, industry expert Riccardo Rebonato presents a groundbreaking new approach to this important but often undervalued part of the risk management toolkit.
Based on the author’s extensive work, research and presentations in the area, the book fills a gap in quantitative risk management by introducing a new and very intuitively appealing approach to stress testing based on expert judgement and Bayesian networks. It constitutes a radical departure from the traditional statistical methodologies based on Economic Capital or Extreme-Value-Theory approaches.
In this paper we discuss the common shortcomings of a large class of essentially-affine models in the current monetary environment of repressed rates, and we present a class of reduced-form stochastic-market-risk affine models that can overcome these problems. In
particular, we look at the extension of a popular doubly-mean-reverting Vasicek model, but the idea can be applied to all essentially-affine models.
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In this webinar on stress testing with bayesian nets and related techniques, Riccardo Rebonato looks at extracting business value from the stress testing process: