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B. decreases by approximately 4.3%. C. decreases by approximately $1.72. Answer C The put option will decrease in value as the underlying stock price increases: -0.43 x S4 S1.72. 100,000 Stocks Call Option sold has the following details. The stock price is $49, the strike price is $50, the risk-free rate is 5%, the stock price volatility is 20%, and the time to exercise is 20 weeks or 20/52 year. Table below shows Delta, Gamma, Vega, Theta and Rho for the option (i.e., for a long position in one option) Single Option Value (S) Delta (per $) Gamma (per S) Vega (per %) Theta (per day) Rho (per 00) $2.40 0.522 0.121 -0.012 0.089 a. When there is an increase of S0.1 in the stock price with no other changes, calculate the change in the value of the 100,000 short option positions due to Delta. When there is an increase of $0.1 in the stock price with no other changes, calculate the change in the value of the 100,000 short option positions due to Gamma. b. when there is an increase in volatility of 0.5% from 20% to 20.5% with no other changes, calculate the change in the value of the 100,000 short option position due to Vega e, When one day goes by with no changes to the stock price or its volatility, calculate the change in the value of the 100,000 short option position due to Theta. d. when interest rates increase by 1% (or 100 basis points) with no other changes, calculate the change in the value of the 100,000 short option position due to Rho. e

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Answer #1
Stock price 49
Strike price 50
Rf 5%
Volatility 20%
T 20/52
Position (# of stocks) 100000
Parameter Change Change in Underlying (Stock price, interest rate. volatility, time ) Change in 1 call option value Change in position value (100,000) Increase/ decrease
Delta (/$) 0.522 0.1 0.0522 5220 Decrease
Gamma (/$) 0.066 0.1 0.0066 660 Decrease
Vega (/%) 0.121 0.5 0.0605 6050 Decrease
Theta (/day) -0.012 1 -0.012 1200 Increase
Rho (/%) 0.089 1 0.089 8900 Decrease
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