I am trying to assist you in saying that from your response it is clear without ANY doubt that you are precisely the kind of person who should not be shorting options. 1. You have a trading account with limited margin. 2. You are trying to push the margin with short options. 3. You apparently have somewhat limited trading experience. Understand that a stock can easily rally 5-6 percent in a single session, or overnight. Happens every day. But what if you had been short calls? Don't think it will happen? Wrong! You may devastate your account, and if you receive a margin call when the stock runs against you, what are your plans? For all this risk, you are gaining what? A small premium, and even if you bet right and the underlying goes to hell you are limited in your gain? So you are going to risk huge potential losses for a few bucks? Now, to this scenario, add the following: - Short selling of ANY kind, is by definition, a high risk proposition. Particularly in a market environment that is now showing a decided upward trend. - Options of ANY kind, are by definition, a high risk proposition. - Naked calls, are by any definition, the highest risk of any options strategy, and one of the very few investment schemes on the planet that can literally take you out of the game overnight. And you want to take on all this? A guy who has been trading bonds?