Ang, James S.; Jou, Gwoduan David; Lai, Tsong-Yue - In: Review of Pacific Basin Financial Markets and Policies … 12 (2009) 02, pp. 159-176
We assume that the call option's value is correctly priced by Black and Scholes' option pricing model in this paper. This paper derives an exact closed-form solution for implied standard deviation under the condition that the underlying asset price equals the present value of the exercise price....