18.2 Binomial trees Binomial trees are frequently used to approximate the movements in the price of a stock or other asset In each small interval of time the stock price is assumed to move up by a proportional amount u or to move down by a proportional amount d Options, Futures, and Other Derivatives, 5th edition C 2002 by John C Hull18.2 Options, Futures, and Other Derivatives, 5th edition © 2002 by John C. Hull Binomial Trees • Binomial trees are frequently used to approximate the movements in the price of a stock or other asset • In each small interval of time the stock price is assumed to move up by a proportional amount u or to move down by a proportional amount d