You decide to purchase

$5$

$0$

$0$

$$shares of a stock that is currently trading at $

$2$

$0$

$$per share. How much is the margin requirement

$($

This is the amount of money you are required to have in order to purchase this stock

$)$

$?$

$$

What happens when stock price goes up to $

$2$

$4$

$?$

What happens when stock price drops to $

$1$

$0$

$?$