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A United States investor writes eight naked call option contracts and eleven naked put option contracts

$($each contract is for options on $100$ shares$).$ The call option price is $$5\mathrm{.}00,$ the put option price is $$10\mathrm{.}55,$

the strike price for both calls and puts is $$90\mathrm{.}00,$ and the stock price is $$84\mathrm{.}00.$ What is the initial margin

requirement for the investor?

This information is summarized in the table below.

The initial and maintenance margin for a written naked call option is the greater of the following two

calculations:

Calculation $1$: A total of $100\%$ of the proceeds of the sale plus $20\%$ of the underlying share price less the

amount if any by which the option is out of the money

Margin requirement for all written call option contracts

Calculation $2$: A total of $100\%$ of the option proceeds plus $10\%$ of the underlying share price

Margin requirement for all written call option contracts

Therefore, the initial and maintenance margin for all written naked call options is:

The initial and maintenance margin for a written naked put option is the greater of:

Calculation $1$: A total of $100\%$ of the proceeds of the sale plus $20\%$ of the underlying share price less the

Please include excel formulas for the yellow blanks! Thank you!!

Margin requirement for all written put option contracts

Calculation $2$: A total of $100\%$ of the option proceeds plus $10\%$ of the exercise price

Margin requirement for all written put option contracts

Therefore, the initial and maintenance margin for all written naked put options is:

Hence, the total initial margin requirement for the investor is: