Forgive me if I am beating a dead horse here. What people are trying to tell you is that the broker's margin is irrelevant if the underlying moves rapidly and option is exercised. Example: Today, you sell a 50 put on a $52 stock. Tomorrow, 1987 happens again, the market falls 22%, and your stock, which is more volatile than the market, falls 50%. The holder immediately puts the stock to you, so that you pay $5000 for a $26 stock. Forget about any stop you set--there is no guarantee that it will execute prior to the exercise if something like this were to happen overnight. Now multiply this by however many puts you are selling. At this juncture, it seems to me that the $1000 or so you were initially required to keep as margin is an irrelevant number. So you can see that it only makes sense to sell these puts if you really, really want to buy the stock at $50 minus the premium--that is, if you would have bought the stock at $50 minus the premium under any circumstances. And you can also see that it does not make sense to sell too many of these. A small amount every month is reasonable, at least at times when the general market is not going to hell in a handbasket. Some may wish to argue that 1987 won't happen again tomorrow. Well, it probably won't. However, it will happen again, sometime.