Let's say my broker wants 200% margin on short sells (100% my own money, and 100% of the short proceeds).
This means, in total, I will spend $100 on GOOG, get $100 from PNQI, but then put $200 in margin, for a total of $200 of my own money.
My question is if instead of putting $200 in margin, I put my $100 of GOOG in and $100 of proceeds from PNQI.
This would mean I would spend $100 on GOOG, get $100 from PNQI, put that $100 in the margin, and then put the $100 of GOOG in the margin. This would only be $100 of my own money.
Is this possible? Of course it is a little riskier for the broker (he has to worry about both PNQI going up and GOOG going down), but he would just charge some more fees, and it would generally be an increase in my leverage.
If this isn't possible with short selling, is there anyway to do this with some other instrument?
Note: Feel free to edit this post to make the terminology better. (Don't worry, I am not actually putting $100 in the stock market. I'm only playing a simulation.)