OPERATIONAL RISK WITH EXCEL AND VBA

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1 OPERATIONAL RISK WITH EXCEL AND VBA Preface. Acknowledgments. CHAPTER 1: Introduction to Operational Risk Management and Modeling. What is Operational Risk? The Regulatory Environment. Why a Statistical Approach to Operational Risk Management? CHAPTER 2: Random Variables, Risk indicators, and Probability. Random Variables and Operational Risk Indicators. Types of Random Variable. Probability. Frequency and Subjective Probability. Probability Functions. Case Studies. Case Study 2.1: Downtown Investment Bank. Case Study 2.2: Mr. Mondeys OPVaR. Case Study 2.3: Risk in Software Development. Useful Excel Functions. CHAPTER 3: Expectation, Covariance, Variance, and Correlation. Expected Value of a Random Variable. Variance and Standard Deviation.

2 Covariance and Correlation. Some Rules for Correlation, Variance, and Covariance. Case Studies. Case Study 3.1: Expected Time to Complete a Complex Transaction. Case Study 3.2: Operational Cost of System Down Time. CHAPTER 4: Modeling Central Tendency and Variability of Operational Risk Indicators. Empirical Measures of Central Tendency. Measures of Variability. Case Studies. Case Study 4.1: Approximating Business Risk. Excel Functions. CHAPTER 5: Measuring Skew and Fat Tails of Operational Risk Indicators. Measuring Skew. Measuring Fat Tails. Review of Excel and VBA Functions for Skew and Fat Tails. CHAPTER 6: Statistical Testing of Operational Risk Parameters. Objective and Language of Statistical Hypothesis Testing. Steps Involved In Conducting a Hypothesis Test. Confidence Intervals.

3 Case Study 6.1: Stephans Mistake. Excel Functions for Hypothesis Testing. CHAPTER 7: Severity of Loss Probability Models. Normal Distribution. Estimation of Parameters. Beta Distribution. Erlang Distribution. Exponential Distribution. Gamma Distribution. Lognormal Distribution. Pareto Distribution. Weibull Distribution. Other Probability Distributions. What Distribution Best Fits My Severity of Loss Data? Case Study 7.1: Modeling Severity of Loss Legal Liability Losses. CHAPTER 8: Frequency of Loss Probability Models. Popular Frequency of Loss Probability Models. Other Frequency of Loss Distributions. Chi-Squared Goodness of Fit Test. Case Study 8.1: Key Personnel Risk.

4 CHAPTER 9: Modeling Aggregate Loss Distributions. Aggregating Severity of Loss and Frequency of Loss Distributions. Calculating OpVaR. Coherent Risk Measures. CHAPTER 10: The Law of Significant Digits and Fraud Risk Identification. The Law of Significant Digits. Benfords Law in Finance. Case Study 10.1: Analysis of Traders Profit and Loss Using Benfords Law. A Step Towards Better Statistical Methods of Fraud Detection. CHAPTER 11: Correlation and Dependence. Measuring Correlation. Dependence. Stochastic Dependence. CHAPTER 12: Linear Regression in Operational Risk Management. The Simple Linear Regression Model. Multiple Regression. Prediction. Polynomial and Other Types of Regression.

5 Multivariate Multiple Regression. Regime-Switching Regression. The Difference Between Correlation and Regression. A Strategy for Regression Model Building in Operational Risk Management. CHAPTER 13: Logistic Regression in Operational Risk Management. Binary Logistic Regression. Bivariate Logistic Regression. Case Study 13.1: Nostro Breaks and Volume in a Bivariate Logistic Regression. Other Approaches for Modeling Bivariate Binary Endpoints. CHAPTER 14: Mixed Dependent Variable Modeling. A Model for Mixed Dependent Variables. Working Assumption of Independence. Understanding the Benefits of Using a WAI. Case Study 14.1: Modeling Failure in Compliance. CHAPTER 15: Validating Operational Risk Proxies Using Surrogate Endpoints. The Need for Surrogate Endpoints in OR Modeling. The Prentice Criterion. Limitations of the Prentice Criterion. The Real Value Added of Using Surrogate Variables. Validation Via the Proportion Explained.

6 Limitations of Surrogate Modelling in Operational Risk Management. Case Study 15.1: Legal Experience as a Surrogate Endpoint for Legal Costs for a Business Unit CHAPTER 16: Introduction to Extreme Value Theory. Fisher-TippetGnedenko Theorem. Method of Block Maxima. Peaks over Threshold Modeling. CHAPTER 17: Managing Operational Risk with Bayesian Belief Networks. What is a Bayesian Belief Network? Case Study 17.1: A BBN Model for Software Product Risk. Creating a BBN-Based Simulation. Assessing the Impact of Different Managerial Strategies. Perceived Benefits of Bayesian Belief Network Modeling. Common Myths About BBNs The Truth for Operational Risk Management. CHAPTER 18: Epilogue. Winning the Operational Risk Argument. Final Tips on Applied Operational Risk Modeling. Appendix. Statistical Tables.

7 Cumulative Distribution Function of the Standard Normal Distribution. Chi-Squared Distribution. Students t Distribution. F Distribution. Notes. Bibliography. About the CD-ROM. Index.

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