Coherent Stress Testing

Informationen zum Autor DR. RICCARDO REBONATO (London, UK) is Head of Front Office Risk Management and Head of the Clients Analytics team at BGM RBS. He is visiting lecturer at Oxford University (Mathematical Finance) and adjunct professor at Imperial College (Tanaka Business School). He sits on the Board of Directors of ISDA and on the Board of Trustees for GARP. He is an editor for the International Journal of Theoretical and Applied Finance, Applied Mathematical Finance, Journal of Risk, and the Journal of Risk Management in Financial Institutions. He holds doctorates in Nuclear Engineering and in Science of Material/Solid State Phsyics. He was a research fellow in Physics at Corpus Christi College, Oxford, UK. Klappentext 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.The book is split into four parts. Part I looks at stress testing and at its role in modern risk management. It discusses the distinctions between risk and uncertainty, the different types of probability that are used in risk management today and for which tasks they are best used. Stress testing is positioned as a bridge between the statistical areas where VaR can be effective and the domain of total Keynesian uncertainty. Part II lays down the quantitative foundations for the concepts described in the rest of the book. Part III takes readers through the application of the tools discussed in part II, and introduces two different systematic approaches to obtaining a coherent stress testing output that can satisfy the needs of industry users and regulators. In part IV the author addresses more practical questions such as embedding the suggestions of the book into a viable governance structure. Zusammenfassung 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.The book is split into four parts. Part I looks at stress testing and at its role in modern risk management. It discusses the distinctions between risk and uncertainty, the different types of probability that are used in risk management today and for which tasks they are best used. Stress testing is positioned as a bridge between the statistical areas where VaR can be effective and the domain of total Keynesian uncertainty. Part II lays down the quantitative foundations for the concepts described in the rest of the book. Part III takes readers through the application of the tools discussed in part II, and introduces two different systematic approaches to obtaining a coherent stress testing output that can satisfy the needs of industry users and regulators. In part IV the author addresses more practical questions such as embedding the suggestions of the book into a viable governance structure. Inhaltsverzeichnis Acknowledgements.1 Introduction.1.1 Why We Need Stress Testing.1.2 Plan of the Book.1.3 Suggestions for Further Reading.I Data, Models an...

Autorentext

DR. RICCARDO REBONATO (London, UK) is Head of Front Office Risk Management and Head of the Clients Analytics team at BGM RBS. He is visiting lecturer at Oxford University (Mathematical Finance) and adjunct professor at Imperial College (Tanaka Business School). He sits on the Board of Directors of ISDA and on the Board of Trustees for GARP. He is an editor for the International Journal of Theoretical and Applied Finance, Applied Mathematical Finance, Journal of Risk, and the Journal of Risk Management in Financial Institutions. He holds doctorates in Nuclear Engineering and in Science of Material/Solid State Phsyics. He was a research fellow in Physics at Corpus Christi College, Oxford, UK.

Klappentext

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. The book is split into four parts. Part I looks at stress testing and at its role in modern risk management. It discusses the distinctions between risk and uncertainty, the different types of probability that are used in risk management today and for which tasks they are best used. Stress testing is positioned as a bridge between the statistical areas where VaR can be effective and the domain of total Keynesian uncertainty. Part II lays down the quantitative foundations for the concepts described in the rest of the book. Part III takes readers through the application of the tools discussed in part II, and introduces two different systematic approaches to obtaining a coherent stress testing output that can satisfy the needs of industry users and regulators. In part IV the author addresses more practical questions such as embedding the suggestions of the book into a viable governance structure.

Inhalt

Acknowledgements. 1 Introduction. 1.1 Why We Need Stress Testing. 1.2 Plan of the Book. 1.3 Suggestions for Further Reading. I Data, Models and Reality. 2 Risk and Uncertainty - or, Why Stress Testing is Not Enough. 2.1 The Limits of Quantitative Risk Analysis. 2.2 Risk or Uncertainty? 2.3 Suggested Reading. 3 The Role of Models in Risk Management and Stress Testing. 3.1 How Did We Get Here? 3.2 Statement of the Two Theses of this Chapter. 3.3 Defence of the First Thesis (Centrality of Models). 3.3.1 Models as Indispensable Interpretative Tools. 3.3.2 The Plurality-of-Models View. 3.4 Defence of the Second Thesis (Coordination). 3.4.1 Traders as Agents. 3.4.2 Agency Brings About Coordination. 3.4.3 From Coordination to Positive Feedback. 3.5 The Role of Stress and Scenario Analysis. 3.6 Suggestions for Further Reading. 4 What Kind of Probability Do We Need in Risk Management? 4.1 Frequentist versus Subjective Probability. 4.2 Tail Co-dependence. 4.3 From Structural Models to Co-dependence. 4.4 Association or Causation? 4.5 Suggestions for Further Reading. II The Probabilistic Tools and Concepts. 5 Probability with Boolean Variables I: Marginal and Conditional Probabilities. 5.1 The Set-up and What We are Trying to Achieve. 5.2 (Marginal) Probabilities. 5.3 Deterministic Causal Relationship. 5.4 Conditional Probabilities. 5.5 Time Ordering and Causation. 5.6 An Important Consequence: Bayes' Theorem. 5.7 Independence. 5.8 Two Worked-Out Examples. 5.8.1 Dangerous Running. 5.8.2 Rare and Even More Dangerous Diseases. 5.9 Marginal and Conditional Probabilities: A Very Important Link. 5.10 Interpreting and Generalizing the Factors xk i. 5.11 Conditional Probability Maps. 6 Probability with Boolean Variables II: Joint Probabilities. 6.1 Conditioning on More Than O…