Quote from joecgoodman:
Okay, so now you've sold a put and it expired in the money, got exercised, and you now own shares of a company you pre-determined you'd like to have in your portfolio. What now? Get rid of them as soon and as profitably as possible. Sell covered calls against them every month until you get called out of your shares.
You could accomplish the same goal simply by being long stock-short call then when the stock drops, sell another call. Selling naked puts is synthetically the same as being long stock-short call.
Although you do have some margin advantages to selling a put (20% regt margin of the strike) vs buying long stock (50% reg t margin of stock price). However, the risk graphs are identical.