Abstract: This paper evaluates the lognormality assumption in Black-Scholes call options model. The data for this study were obtained from Australian Clearing House of Australian Securities Exchange (ASX). The data consists of fifty (50) enlisted stocks in the clearing house as products of monthly market summary for long term options which consists of the period of January 3rd, 2017 to December, 31st 2019 when there are no significant structural changes among the products arranged in 25, 27, 28, 29 and 30 maturity days.