Is there any difference when shorting stock under the following 2 brokerage accounts?
- $0 cash $50k in stocks
- $50k cash $0 in stocks
Would you have to pay margin like longing a stock in scenario 1 since you have no money left?
If the $50k worth of stocks are marginable securities then there is no difference between either scenario. They are equal collateral.
When you short stock, you receive a credit in your account from the sale of the security. You are not borrowing money from your broker so there is no margin interest. However, there is a borrow fee which is paid to the lending broker, some of which may be shared with your broker and some brokers share a portion of the borrow fee with the owner of the loaned security.
Margin interest is constant. Borrow fees can vary day to day, sometimes dramatically.