25. The current stock price of Alcoa is $65, and the stock does not pay dividends. The instantaneous risk-free rate of return is 7%. The instantaneous standard deviation of Alcoco's stock is 30%. You want to purchase a put option on this stock with an exercise price of $70 and an expiration date 30 days from now. According to the Black-Scholes OPM, you should hold __________ shares of stock per 100 put options to hedge your risk. Please show written out, how to do it step by step, not with excel.

Financial Management: Theory & Practice
16th Edition
ISBN:9781337909730
Author:Brigham
Publisher:Brigham
Chapter7: Corporate Valuation And Stock Valuation
Section: Chapter Questions
Problem 16P: Crisp Cookware’s common stock is expected to pay a dividend of $3 a share at the end of this year...
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25. The current stock price of Alcoa is $65, and the stock does not pay dividends. The instantaneous risk-free rate of return is 7%. The instantaneous standard deviation of Alcoco's stock is 30%. You want to purchase a put option on this stock with an exercise price of $70 and an expiration date 30 days from now. According to the Black-Scholes OPM, you should hold __________ shares of stock per 100 put options to hedge your risk.

Please show written out, how to do it step by step, not with excel.

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