N1569 Workshop 7
1. Complete the following table for pay-off to different positions on standard European calls and puts assuming the underling price is 100 at maturity:
Option Type |
Position |
Strike (K) |
Pay-off |
Put |
Long |
90 |
|
Call |
Long |
40 |
|
Put |
Short |
120 |
|
Call |
Short |
80 |
|
2. Suppose you have bought 10 of option 1 and sold 20 of option 2 and their Greeks are:
• Option 1: callwith δ = 0.5, γ = 0.01 and ν = 0.08
• Option 2: put with δ = −0.4, γ = 0.02 and ν = 0.05
Find the net position Greeks.
3. Suppose you have bought 80 of option 1:
• Option 1: put with δ = −0.8, γ = 0.02 and ν = 0.06
Two other options on the same stock are available:
• Option 2: call with δ = 0.6, γ = 0.01 and ν = 0.15
• Option 3: put with δ = −0.8, γ = 0.03 and ν = 0.05
Each option is for 100 shares. How many of options 2 and 3 should I buy or sell to make the position gamma-vega neutral? How many shares should I buy or sell so that the total position is delta-gamma-vega neutral?
4. A call option has strike 98, and 30 days to maturity. The underlying price is 100, and its volatility is 25%. Assuming the interest rate r and dividend yield y are both 0, find
(a) the Black-Scholes delta and gamma
(b) the delta-gamma approximation to the change in price of the option when the underlying price rises by 2
(c) the delta-gamma approximation to the change in price of the option when the underlying price falls by 10
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