In: Finance
A European call option on Visa stock costs $85.36, while a European put option on the same stock costs $31. Both options expire in 0.5 years and have a strike price of 800. Google does not pay dividends and its stock price is $850.
What should be the risk-ree rate (effective annual rate)?
According to put call parity
Cash Investment + Call option premium = Stock + Price of put option
{for above equation to hold, Strike price of both call and put options must be same and Cash Investment must be present value of strike price of options}
Therefore,
Cash Investment + $85.36 = $850 + $31
Cash Investment = $795.64
Future Value of cash investment = strike price of options
Future Value of cash investment = $ 800
FV = PV x ert
800 = 795.64 x er0.5
1.00548 = er0.5
0.005465 = 0.5r
Therefore r = 1.093% p.a. continously compounded