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Estudo

Evaluating Value-at-Risk models via Quantile regressions

Gaglianone, Wagner Piazza; Linton, Oliver; Lima, Luiz Renato Regis de Oliveira

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Resumo

This paper is concerned with evaluating value at risk estimates. It is well known that using only binary variables to do this sacrifices too much information. However, most of the specification tests (also called backtests) avaliable in the literature, such as Christoffersen (1998) and Engle and Maganelli (2004) are based on such variables. In this paper we propose a new backtest that does not realy solely on binary variable. It is show that the new backtest provides a sufficiant condition to assess the performance of a quantile model whereas the existing ones do not. The proposed methodology allows us to identify periods of an increased risk exposure based on a quantile regression model (Koenker & Xiao, 2002). Our theorical findings are corroborated through a monte Carlo simulation and an empirical exercise with daily S&P500 time series.

Ficha do documento

Tipo
Estudo
Ano
2008
Instituição
Fundação Getulio Vargas. Escola de Pós-graduação em Economia
Idioma
Inglês
Acesso
Não informado
Identificador
oai:repositorio.fgv.br:10438/1718

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