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Risk Management in Turbulent Times

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Product Description

The subprime crisis has shown that the sophisticated risk management models used by banks and insurance companies had serious flaws. Some people even suggest that these models are completely useless. Others claim that the crisis was just an unpredictable accident that was largely amplified by the lack of expertise and even naivety of many investors. This book takes the middle view. It shows that these models have been designed for "tranquil times", when financial markets behave smoothly and efficiently. However, we are living in more and more "turbulent times": large risks materialize much more often than predicted by "normal" models, financial models periodically go through bubbles and crashes. Moreover, financial risks result from the decisions of economic actors who can have incentives to take excessive risks, especially when their remunerations are ill designed. The book provides a clear account of the fundamental hypotheses underlying the most popular models of risk management and show that these hypotheses are flawed. However it shows that simple models can still be useful, provided they are well understood and used with caution.

Authors:

  • Gilles Beneplanc, Region leader, Europe, Middle East, and Africa, Mercer LLC, 
  • Jean-Charles Rochet, Professor of Mathematics and Economics, University of Toulouse

ISBN: 9780199774081

Publisher: Oxford University Press - USA  -  September 2011

Format: Hardback 224 pages | 76 b/w line | 235x156mm

CONTENTS:

INTRODUCTION  

I RISK MANAGEMENT: WHAT MUST BE CHANGED  1 Lessons From recent Financial Crises  1.1 The Basic Goals of Risk Management  1.2 When Risk Management Fails  1.3 What Should Be Done?  2 Living in Turbulent Times  2.1 New and Larger Risks  2.2 Increased Management Accountability  2.3 Need for a Global Approach  3 The Need for a Proper Methodology  3.1 The Necessary Ingredients  3.2 Risk Mapping  3.3 Loss Control  3.4 Risk Allocation  

II WHAT IS BEHIND RISK MODELING  4 The Basic Tools of Risk Modeling  4.1 Assessing Probabilities: The Frequentist and Subjective Approaches  4.2 Bayesian updating  4.3 Estimating Loss Distributions  4.4 Combining Event Trees and Monte Carlo Methods  4.5 The Dangers of the Stationarity Assumption  5 Statistical Risk Measures  5.1 The Expectation or Mean  5.2 The Variance  5.3 Linear Correlation  5.4 Copulas  5.5 The Value at Risk  5.6 Mutualization and Diversification  5.7 The Dangers of Using Simple Risk Measures  Appendix: Extreme Value Theory  6 Leverage and Ruin Theory  6.1 Leverage and Return on Equity  6.2 Economic Capital for a Bank  6.3 Economic Capital for an Insurance Company  6.4 The Limits of Ruin Theory  

III THE PERFECT MARKETS HYPOTHESIS AND ITS DANGERS  7 Risk Neutral Valuation  7.1 The Expected Present Value Criterion  7.2 The Magic of Perfect Markets  7.3 Complete Markets and Absence of Arbitrage Opportunities  7.4 A Binomial Example  7.5 The Mirages of the Perfect Markets World  8 The Case of Incomplete Markets: Relating Risk Premiums to Economic  Fundamentals  8.1 Solving the St Petersburg Paradox  8.2 Certainty Equivalent  8.3 Markets for Exchanging Risks  8.4 The Limits of the Equilibrium Approach  9 Risk Management in a Normal World  9.1 The Mean-Variance Criterion  9.2 Portfolio Choice  9.3 The Diversification Principle  9.4 Efficient Portfolios and the Sharpe Ratio  9.5 The Capital Asset Pricing Model (CAPM)  9.6 Futures Contracts and Hedging  9.7 Capital Allocation and RaRoc  9.8 The Dangers of Viewing the World as <"Normal>"  Appendix 1: Portfolio Choice with Several Risky Assets  Appendix 2: Deriving the CAPM Formula  

IV RISK MANAGEMENT AND SHAREHOLDER VALUE  10 Why Market Imperfections Matter for Shareholder Value  10.1 Standards Methods for Assessing Shareholder Value  10.2 Why is the Shareholder Value Function Likely to Be Non Linear: A Simple Example  10.3 Incentive Problems Generate Financial Frictions  11 The Shareholder Value Function  11.1 A Target Level of Cash  11.2 A Model for Optimizing Liquidity Management  11.3 Liquidity and Shareholder Value  Appendix 1: Stochastic Differential Calculus  Appendix 2: Derivation of the Shareholders Value Function  12 Risk Management and the Shareholder Value Function  12.1 How Much Risk to Take?  12.2 Which Risks to Insure?  12.3 How Much Liquidity to Keep in Reserves?  12.4 How Much hedging to Perform?

V WHAT TO DO IN PRACTICE?  13 The Different Steps of the Implementation  13.1 Estimating the Shareholder Value Function  13.2 A Unifying Metric for Risk Mapping: The Risk Value Mapping  13.3 The New Instruments of Risk Management  14 Learning from an Example  14.1 Presentation of Med Corp  14.2 Risk Analysis  14.3 Shareholder Value and RM for Med Corp  14.4 A Risk Transfer Policy for Med Corp  15 Conclusion: Some Simple Messages  15.1 Message # 1: Quantitative models are needed but they have to be used  with precaution  15.2 Message # 2: Risk Management creates value for shareholders  15.3 Message # 3: Things to do in practice  15.4 Message # 4: Key Ingredients for a successful RM approach  

Index


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