margia? Whit if the wtock nui$-$ your rcturn have heren had yoa purchued the sock without

is St$6$ when you sell the stodi?

$70$ nercent. Docs this sepes Proflems $2$ and $3$ ssuming the initial margia reguirement is Margin Purchases $(1\mathrm{.}03$ a relutisaship between the mitial margin and returns?