For a binomial tree modeling the price movements of a nondividend-paying stock, you are given: (i) The

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For a binomial tree modeling the price movements of a nondividend-paying stock, you are given:

(i) The length of each period is 4 months.

(ii) The current stock price is 120.

(iii) u = 1.2212, where u is one plus the percentage change in the stock price per period if the price goes up.

(iv) d = 0.8637, where d is one plus the percentage change in the stock price per period if the price goes down.

(v) The continuously compounded risk-free interest rate is 8%.

Let PI be the price of a 1-year at-the-money European put option and PII be the price of an otherwise identical shout put option.

Calculate PII − PI.

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