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Consider a binomial tree problem for an American option. A stock price is currently $50. Over...

Consider a binomial tree problem for an American option.

A stock price is currently $50. Over each of the next two 3-month periods it is expected to go up by 7% or down by 6%. The risk-free interest rate is 5% per annum with continuous compounding. What is the value of a 6-month American put option with a strike price of $51?

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