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Option Mispricing Around Nontrading Periods

86 Pages Posted: 22 Mar 2009 Last revised: 17 Sep 2017

Christopher S. Jones

University of Southern California - Marshall School of Business - Finance and Business Economics Department

Joshua Shemesh

Monash University - Department of Banking and Finance; Financial Research Network (FIRN)

Date Written: May 9, 2017

Abstract

We find that option returns are significantly lower over nontrading periods, the vast majority of which are weekends. Our evidence suggests that nontrading returns cannot be explained by risk, but are rather the result of widespread and highly persistent option mispricing driven by the incorrect treatment of non-smoothness in stock return variance. The size of the effect implies that the broad spectrum of finance research involving option prices should account for nontrading effects and non-smoothness in variance more generally. Our study further suggests how alternative industry practices could improve the efficiency of option markets in a meaningful way.

Keywords: Nontrading, weekend effect, equity options

JEL Classification: G12, G13, G14

Suggested Citation

Jones, Christopher S. and Shemesh, Joshua, Option Mispricing Around Nontrading Periods (May 9, 2017). AFA 2010 Atlanta Meetings Paper; Marshall School of Business Working Paper No. FBE 03-10. Available at SSRN: https://ssrn.com/abstract=1364721 or http://dx.doi.org/10.2139/ssrn.1364721

Christopher S. Jones (Contact Author)

University of Southern California - Marshall School of Business - Finance and Business Economics Department ( email )

Marshall School of Business
Los Angeles, CA 90089
United States

Joshua Shemesh

Monash University - Department of Banking and Finance ( email )

Melbourne
Australia

Financial Research Network (FIRN)

C/- University of Queensland Business School
St Lucia, 4071 Brisbane
Queensland
Australia

HOME PAGE: http://www.firn.org.au

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