The current price of a stock is $40. The price of a oneyear European put option on the stock with a strike price of $30 is quoted at $2 and the price of a oneyear European call option on the stock with a strike price of $50 is quoted at $3.
a) Investor A is bullish on the stock and buys 100 shares. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year.
b) Suppose investor A buys the call option on 100 shares instead. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year. Compare buying stock versus buying call option in terms of risk and reward.
c) Investor B is bearish on the stock and shorts 100 shares. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year. Assume that he needs to post 50% cash margin when he initiates the short position (and assume there is no margin call).
d) Suppose investor B buys the put option on 100 shares instead. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year. Compare shorting stocks versus buying put option in terms of risk and reward.
e) Investor C wants to own the shares but worries about the downside. So he buys both the stock and the put option on 100 shares. a. Draw a diagram illustrating how the investor’s profit varies with future share price. What are his max profit and max loss per share? b. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year.
f) Investor D wants to own the shares but wants to reduce his initial investment cost. So he buys the stock and shorts the call option on 100 shares. a. Draw a diagram illustrating how the investor’s profit varies with stock price. What are his max profit and max loss per share? b. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year.
g) Investor E wants to bet on the possible share price fluctuations in the coming year. He buys the put option and the call option on 100 shares. a. Draw a diagram illustrating how the investor’s profit varies with stock price. What are his max profit and max loss per share? b. Compute his dollar profit and return if the share price is $25, $42, or $56 in one year.
a)  
Investment in stock=100*$40  $4,000  
A  B=A*100  C=B4000  D=C/4000  
Value of  Profit/  Percentage  
Share Price  100 Shares  (Loss)  gain/(loss)  
$25  $2,500  ($1,500)  37.50%  
$42  $4,200  $200  5.00%  
$56  $5,600  $1,600  40.00%  
b)  Payoff of Call Option with strike $50  
and Price at expiration =S  
Max((S50),0)  
Cost of Call option per share  $3  
Total Investment  $300  
S  A  B=(A3)*100  C=B/300  
Price at  Payoff  Profit/  Percentage  
Expiration  per Option  (Loss)  Gain/(Loss)  
$25  $0  ($300)  100%  
$42  $0  ($300)  100%  
$56  $6  $300  100%  
Option has Limited risk and infinite reward  
Stock has infinite risk and infinite reward  
c)  Investment =50%*40*100  $2,000  
A  B=A*100  C=4000B  D=C/2000  
Value of  Profit/  Percentage  
Share Price  100 Shares  (Loss)  gain/(loss)  
$25  $2,500  $1,500  75.00%  
$42  $4,200  ($200)  10.00%  
$56  $5,600  ($1,600)  80.00%  
d)  Payoff of Put Option with strike $30  
and Price at expiration =S  
Min.((30S),0)  
Cost of Put option per share  $2  
Total Investment  $200  
S  A  B=(A2)*100  C=B/200  
Price at  Payoff  Profit/  Percentage  
Expiration  per Option  (Loss)  Gain/(Loss)  
$25  $5  $300  150%  
$42  $0  ($200)  100%  
$56  $0  ($200)  100%  
Option has Limited risk and infinite reward  
Shorting Stock has infinite risk and infinite reward  
e)  BUYS SHARE AND PUT OPTION:  
Investment in Shares  $4,000  
Investment in Put Option  $200  
Total Investment  $4,200  
S  A  B=A40  C=(A+B2)*100  D=C/4200  
Price at  Payoff  Payoff  Profit/  Percentage  
Expiration  per Option  Per Shares  (Loss)  Gain/(Loss)  
$15  $15  ($25)  ($1,200)  
$20  $10  ($20)  ($1,200)  
$25  $5  ($15)  ($1,200)  29%  
$30  $0  ($10)  ($1,200)  
$42  $0  $2  $0  0%  
$50  $0  $10  $800  
$56  $0  $16  $1,400  33%  

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