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Model Uncertainty and Option Markets with Heterogeneous Beliefs
Author(s) -
BURASCHI ANDREA,
JILTSOV ALEXEI
Publication year - 2006
Publication title -
the journal of finance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 18.151
H-Index - 299
eISSN - 1540-6261
pISSN - 0022-1082
DOI - 10.1111/j.1540-6261.2006.01006.x
Subject(s) - volatility (finance) , econometrics , index (typography) , economics , valuation of options , stochastic volatility , financial economics , computer science , world wide web
This paper provides option pricing and volume implications for an economy with heterogeneous agents who face model uncertainty and have different beliefs on expected returns. Market incompleteness makes options nonredundant, while heterogeneity creates a link between differences in beliefs and option volumes. We solve for both option prices and volumes and test the joint empirical implications using S&P500 index option data. Specifically, we use survey data to build an Index of Dispersion in Beliefs and find that a model that takes information heterogeneity into account can explain the dynamics of option volume and the smile better than can reduced‐form models with stochastic volatility.