Brian Lee
Jul 29, 2025
Hull, John C. Fundamentals of Futures And Options Markets. 9th ed. Upper Saddle River, NJ: Pearson, 2016. ISBN 978‑0‑13‑408324‑7.
Black-Scholes-Merton … assumes that the return on the stock in a very short period of time, \(\Delta t\), is normally distributed.
In contrast, future stock prices are assumed to follow a lognormal distribution (Hull 2016, 295).
See Mathematics for the relationship between normal and lognormal distributions.Future stock prices are assumed to follow a lognormal distribution.
In contrast, stock returns are modeled using a normal distribution (Hull 2016, 294).
See Mathematics for the connection between normal and lognormal distributions.Hull uses 252 as the average number of trading days in a year. However, Passarelli uses 256 instead of 252; see (Passarelli 2012, 62).
See Number of Trading Days for the reasons for discrepancies.Because the American call price, \(C\), equals the European call price, \(c\), for a non-dividend-paying stock, equation (13.5) also gives the price of an American call.
(13.5) is the call price question from Black-Scholes-Merton (BSM).
Black-Scholes-Merton is the same as Black-Scholes.Calculating Greeks require choosing an option-pricing model.