general rule for margin

if i sell naked put... what is the general rule for margin ?

I know they will keep the premium and add that to my credit.

So for instance if I sell a put and get credit ( premium )
and this is naked short put .....

what is the required margin... IB, or SAXO

2 senarios
if it is otm now
and when it gets itm


second part of the Q is
what if i am am covered... does it reduce the margin requirment...
because to cover the sold put, i need to go short in underlaying,
so am I going to be asked to deposit more margin for short of the underlaying, and the sold put less the premium.. ?
 
For the second part of your question:
You have to satisfy margin for one leg of your positions. Either short or naked put which is is higher.
 
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