On the Accuracy of VaR Estimates Based on the Variance-Covariance Approach
Year: 1998
Type: book-chapter
Abstract: We present a thorough empirical study (based on over 8 years of daily data) of candidate models for forecasting losses in relation to positions held against individual risk factors as well as losses in relation to a portfolio of risk factors. As part of the study, we also define various measures and visualization techniques to evaluate the performance of the candidate models in the context of risk management and introduce two innovations: 1) tail emphasized model optimization and 2) implied covariance forecasting. Finally, we highlight the important issue of the estimation error of the covariance matrix in relation to its dimension and the number of datum from which it is estimated and outline a framework for handling this problem.
Source: Contributions to economics
Authors: Rakhal D. Davé, Gerhard Stahl
Language: English
Subfield: Finance
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W1482735627