188 Example: Put Option S0=50;X=50;r=10%;σ=40%; T=5 months =04167 δt=1 month=00833 The parameters imply ll=1.1224:d=0.8909 a=1.0084;p=0.5076 Options, Futures, and Other Derivatives, 5th edition C 2002 by John C Hull18.8 Options, Futures, and Other Derivatives, 5th edition © 2002 by John C. Hull Example: Put Option S0 = 50; X = 50; r =10%; s = 40%; T = 5 months = 0.4167; dt = 1 month = 0.0833 The parameters imply u = 1.1224; d = 0.8909; a = 1.0084; p = 0.5076