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Hedging options in a garch environmenttesting the term structure of stochastic volatility models

Engle, R. F.; Rosenberg, Joshua

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Resumo

This paper develops a methodology for testing the term structure of volatility forecasts derived from stochastic volatility models, and implements it to analyze models of S&P500 index volatility. U sing measurements of the ability of volatility models to hedge and value term structure dependent option positions, we fmd that hedging tests support the Black-Scholes delta and gamma hedges, but not the simple vega hedge when there is no model of the term structure of volatility. With various models, it is difficult to improve on a simple gamma hedge assuming constant volatility. Ofthe volatility models, the GARCH components estimate of term structure is preferred. Valuation tests indicate that all the models contain term structure information not incorporated in market prices.

Ficha do documento

Tipo
Estudo
Ano
1994
Instituição
Escola de Pós-Graduação em Economia da FGV
Idioma
Inglês
Acesso
Não informado
Identificador
oai:repositorio.fgv.br:10438/12169

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