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New publication for Prof. Morellec in the Review of Financial Studies

© 2018 EPFL

© 2018 EPFL

Professor Erwan Morellec's article "Product market competition and option prices" co-written with Professor Alexei Zhdanov has just been accepted for publication by the Review of Financial Studies.


Most firms face some form of competition in product markets. The degree of competition a firm faces feeds back into its cash flows and affects the values of the securities it issues. Through its effects on stock prices, product market competition affects the prices of options on equity and naturally leads to an inverse relationship between equity returns and volatility, generating a negative volatility skew in option prices. Using a large sample of U.S. equity options, we provide empirical support for this finding and demonstrate the importance of accounting for product market competition when explaining the cross-sectional variation in option skew.

Author: Carole Bonardi