How Sensitive are Tail-related Risk Measures in a Contamination Neighbourhood?
Wolfgang Karl Härdle,
Chengxiu Ling
Abstract:Estimation or mis-specification errors in the portfolio return distribution can have a considerable impact on risk measures. This paper investigates the sensitivity of tail-related risk measures including the Value-at-Risk, expected shortfall and the expectile-quantile transformation level in an epsilon-contamination neighbourhood. The findings give the different approximations according to the tail heaviness of the contamination models and its contamination levels. Illustrating examples and an empirical study… Show more
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