Cross-Section of Option Returns and Idiosyncratic Stock Volatility
Chinese University of Hong Kong - Department of Finance
University of Toronto, Rotman School of Management
July 3, 2012
McCombs Research Paper Series No. FIN-15-09
AFA 2012 Chicago Meetings Paper
This paper documents a robust new finding that delta-hedged equity option return decreases monotonically with an increase in the idiosyncratic volatility of the underlying stock. This result can not be explained by standard risk factors. It is distinct from existing anomalies in the stock market or volatility-related option mispricing. It is consistent with market imperfections and constrained financial intermediaries. Dealers charge a higher premium for options on high idiosyncratic volatility stocks due to their higher arbitrage costs. Controlling for limits to arbitrage proxies reduces the strength of the negative relation between delta-hedged option return and idiosyncratic volatility by about 40%.
Number of Pages in PDF File: 48
JEL Classification: G12, G13Accepted Paper Series
Date posted: March 17, 2011 ; Last revised: November 25, 2012
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