What is the price of a European put option on a
non-dividend-paying stock when the stock price is $100, the strike
price is $90, the risk- free interest rate is $5% per annum, the
volatility is 35% per annum (continuously compounded), and the time
to maturity is 6 months? Use the Black-Scholes-Merton option
pricing formula.
One second later, the stock is traded at 101. How would you
estimate the new price for the option without the
Black-Scholes-Merton option pricing formula?