Investors' Heterogeneity and Implied Volatility Smiles
Management Science, vol 59, pp 2392-2412.
41 Pages Posted: 23 Mar 2013 Last revised: 12 Feb 2014
There are 2 versions of this paper
Investors' Heterogeneity and Implied Volatility Smiles
Date Written: December 1, 2012
Abstract
Heterogeneity in beliefs and time preferences among investors make stock volatility stochastic, even though the volatility of the underlying dividend is constant. The prices of the European options written on this stock admit closed-form solutions, hence their hedging deltas. The Black-Scholes implied volatility surface, which depends on wealth distribution, investors' beliefs and time preferences, exhibits observed patterns that are widely documented in various options markets. Along with benchmark models, the model is calibrated weekly to the S&P 500 index options from January 1996 to April 2006. It shows comparable performance to the SVJ model and outperforms the traders' rules and two no-arbitrage models (SV and SVSI) in terms of out-of-sample pricing errors.
Keywords: Heterogeneous Beliefs, Option Pricing, Equilibrium Model, Volatility Smile, Heterogeneous Preferences
JEL Classification: G12, G13
Suggested Citation: Suggested Citation
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