In the revision lectures’ example on option pricing (Page 47) A correction is required in the application of formula for calculating D1.. In the numerator, the “t” that is 0.25 needs to be multiplied with “r” that is 0.05 (as well).. As in the formula of Black & Scholes the whole (r + 0.5s^2) should be multiplied by t..
Thanks for the great contribution towards education..