A trader has the following portfolio:
Long 1-year put with strike $80
Short 1-year call with strike $120
Long 1 share of stock.
(Option contracts are for 1 share).
Assume that the price of the underlying asset is $100. Volatility is 20%, rate=1%, dividend yield 0%.
Calculate the value of the portfolio.
What would be the maximum gain that the trader could incur in a month? Explain how.
What would be the maximum loss the trader could have in 1 month? Explain.
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