An empirical investigation of the GARCH option pricing model: Hedging performance

Abstract

Abstract In this article, we study the empirical performance of the GARCH option pricing model relative to the ad hoc Black‐Scholes (BS) model of Dumas, Fleming, and Whaley. Specifically, we investigate the empirical performance of the option pricing model based on the exponential GARCH (EGARCH) process of Nelson. Using S&P 500 options data, we find that the EGARCH model performs better than the ad hoc BS model both in terms of in‐sample valuation and out‐of‐sample forecasting. However, the superiority of out‐of‐sample performance EGARCH model over the ad hoc BS model is small and insignificant except in the case of deep‐out‐of‐money put options. The out‐performance diminishes as one lengthens the forecasting horizon. Interestingly, we find that the more complicated EGARCH model performs worse than the ad hoc BS model in hedging, irrespective of moneyness categories and hedging horizons. For at‐the‐money and out‐of‐the‐money put options, the underperformance of the EGARCH model in hedging is statistically significant. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:1191–1207, 2003

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