The current price of a stock is $30, and at the end of one year its price will be either $33 or $27. The annual risk-free rate is 3.0%, based on daily compounding. Based on the binominal option pricing model, what is the present value of a 1-year call option with an exercise price of $26?
Using Risk neutral binomial Oprion pricing -
Current Stock Price S0 = 30, Su = 33 and Sd = 27
Since there is no probability mentioned for upside or down side it is safe to assume risk neutral and hence the probability is 0.5
Strike price Sk = 26
Therefore pay off at both upper and lower movement -
Payoff U = 33-26 = 7
Payoff D = 27-26 = 1
Cost of option at C1 (at the end of 1 year) = 7*0.5 + 1*0.5 = 4
Present Value of Option = 4 / (1+r)^1
= 4 / (1.03)^1 = 3.88
Therefore, Present Value of Option = $ 3.88
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