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Question 3 (15 points) Consider the following two portfolios: Portfolio A: 50 short put options on IBM stock with strike price $90 and 50 shares
Question 3 (15 points) Consider the following two portfolios: Portfolio A: 50 short put options on IBM stock with strike price $90 and 50 shares of IBM stock. Each put gives its owner the right to sell one share of the IBM stock. Portfolio B: 10 long call options on IBM stock with strike price $50 and z shares of IBM stock. Suppose that, if IBM stock price at expiration date turns out to be ST = $80, then both portfolios have the same payoff. What is the number of IBM shares z in portfolio B
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