Hao, Jia; Kalay, Avner; Mayhew, Stewart - In: Review of Financial Studies 23 (2010) 1, pp. 271-303
We examine the behavior of call options surrounding the underlying stock's ex-dividend date. The evidence is inconsistent with the predictions of a rational exercise policy; a significant fraction of the open interest remains unexercised, resulting in a windfall gain to option writers. This...