In: Finance
Consider:
(a) Stock trades for $100;
(b) Calls with exercise prices of $90, $100, and $110 trade at prices of $17.03, $10.38, and $6.50 respectively.
If a person buys a $90 call, writes two $100 calls, and buys a $110 call, what is the magnitude of her maximum loss? The answer is 2.77, how do you solve?
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Solution:
This is the butterfly strategy where we buy two call option at different strike price and then sell 2 option between these two strike price.
Buy: Payoff of 90 call option = Max ( Share price - 90 , 0 ) - Premium paid
Buy: Payoff of 110 call option = Max ( Share price - 110 , 0 ) - Premium paid
Sell: Payoff of 100 call option = 2 * (Min(100- share price,0)+ premium received)
Overall Payoff = Payoff from 90 call buy + Payoff from 110 call buy + Payoff from 100 call sell
As per the below screenshot maximum loss = 2.77