Problem 1 Suggest two different portfolios that produce the payoff diagram as in the graph below. Both portfolios may contain any amount of risk-free borrowing or lending, and the underlying stock. Portfolio 1 may contain call options but no put options. Portfolio 2 may contain put options but no call options. Assume the risk-free rate is rf = 10%. 25 20 15 10 5 10 15/20 25 30 35 40 -5 -10 -15

Essentials Of Investments
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Chapter1: Investments: Background And Issues
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**Problem 1**: Suggest two different portfolios that produce the payoff diagram as in the graph below. Both portfolios may contain any amount of risk-free borrowing or lending, and the underlying stock. Portfolio 1 may contain call options but no put options. Portfolio 2 may contain put options but no call options. Assume the risk-free rate is \( r_f = 10\% \).

**Graph Explanation**: 
The graph displays a payoff diagram. The x-axis represents the stock price, ranging from 0 to 40, and the y-axis represents the payoff, ranging from -15 to 25. The payoff line remains at zero up to a stock price of 20. Beyond this point, it increases linearly with the stock price, starting from a payoff of zero at a stock price of 20 to a payoff of 20 at a stock price of 40. This is indicative of a call option payoff structure, where the payoff is zero below the strike price and increases linearly above it.

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**Problem 2**: Suppose that a stock is currently trading at $60 per share, and the stock price can only take two possible values one year from now: it can either go up by 25% or down by 20%. The annual risk-free rate is 4%. Assume that the stock pays no dividends. You are interested in pricing an European put option on this stock. The option has a strike price of $66, and its maturity date is exactly one year from now.

a) What is the payoff on the put option if the stock price goes up by 25%?

b) What is the payoff on the put option if the stock price goes down by 20%?

c) What is the price of the put option?

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**Problem 3**: For a two-period binomial model, you are given:

- Each period is one year.
- The current price for a non-dividend paying stock is $20.
- \( u = 1.2840 \), where \( u \) is one plus the rate of capital gain on the stock per period if the stock price goes up.
Transcribed Image Text:**Problem 1**: Suggest two different portfolios that produce the payoff diagram as in the graph below. Both portfolios may contain any amount of risk-free borrowing or lending, and the underlying stock. Portfolio 1 may contain call options but no put options. Portfolio 2 may contain put options but no call options. Assume the risk-free rate is \( r_f = 10\% \). **Graph Explanation**: The graph displays a payoff diagram. The x-axis represents the stock price, ranging from 0 to 40, and the y-axis represents the payoff, ranging from -15 to 25. The payoff line remains at zero up to a stock price of 20. Beyond this point, it increases linearly with the stock price, starting from a payoff of zero at a stock price of 20 to a payoff of 20 at a stock price of 40. This is indicative of a call option payoff structure, where the payoff is zero below the strike price and increases linearly above it. --- **Problem 2**: Suppose that a stock is currently trading at $60 per share, and the stock price can only take two possible values one year from now: it can either go up by 25% or down by 20%. The annual risk-free rate is 4%. Assume that the stock pays no dividends. You are interested in pricing an European put option on this stock. The option has a strike price of $66, and its maturity date is exactly one year from now. a) What is the payoff on the put option if the stock price goes up by 25%? b) What is the payoff on the put option if the stock price goes down by 20%? c) What is the price of the put option? --- **Problem 3**: For a two-period binomial model, you are given: - Each period is one year. - The current price for a non-dividend paying stock is $20. - \( u = 1.2840 \), where \( u \) is one plus the rate of capital gain on the stock per period if the stock price goes up.
- \( d = 0.8607 \), where \( d \) is one plus the rate of capital loss on the stock per period if the stock price goes down.
- The risk-free interest rate is 5%.

Calculate the price of an American call option on the stock with a strike price of $22.
Transcribed Image Text:- \( d = 0.8607 \), where \( d \) is one plus the rate of capital loss on the stock per period if the stock price goes down. - The risk-free interest rate is 5%. Calculate the price of an American call option on the stock with a strike price of $22.
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