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Ca Refinanceloanshomeequity l Equity u Loans P Szh t g Refinanceloanshomeequity tfo Refinance mula Refinanceloanshomeequity TWO-DATE BINOMIAL OPTION PRICING Up Down Initial stock price Interest rate Exercise price Stock price Bond price Call option A B Call price State prices qu qd Solving for the portfolio parameters: A is the number of shares and B is the number of bonds. 55*A + 108*B = 5 48.5*A + 108*B = 0 or: A*stock*(1+up)+B*(1+interest)=max(stock*(1+up)-X,0) A*stock*(1+down)+B*(1+interest)=max(stock*(1+down)-X,0) The solution is: check on state prices call price state prices Call option price FIVE DATE EUROPEAN BINOMIAL OPTION PRICING up down initial stock price interest rate exercise price stock price bond price Terminal payoff * payoff of "up" of "down" price * steps of paths # paths Option value THREE DATE BINOMIAL OPTION PRICING FOR AMERICAN CALL/PUT American put option =MAX(MAX(X-S*(1+u),0),qu*put_payoffuu+qd*put_payoffud) =MAX(MAX(X-S*(1+d),0),qu*put_payoffud+qd*put_payoffdd) =MAX(MAX(X-S,0),qu*put_valueu+qd*¡¡¡¡