November 2007
Intermediate to advanced
216 pages
7h 20m
English
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9
The validation of equity portfolio risk models
Stephen Satchel** Faculty of Economics, University of Cambridge and Trinity College, Cambridge, UK
Abstract
The purpose of this chapter is to survey risk validation issues for equity portfolio models. Because risk is measured in terms of volatility, an unobservable time-varying variable, there are a number of difficulties that need to be addressed. This is in contrast to a credit risk model, where default or downgrading is observable. In the past, equity risk models have been validated rather informally, but the advent of Basel II has brought about a need for a more formal structure. Furthermore, a number of past high-profile court cases have considered the worthiness of the risk models used by fund ...
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