Quote from talontrading:
Hi Bob,
Love this thread, but this piece of info is not true. In almost all cases, being short a put is exactly equivalent to a covered call. No doubt and no questions possible.
What I posted is true and I am willing to bet on it. It is ONLY equivalent in a textbook and in the highest volume options being traded. Otherwise more often the covered call is the better route CURRENTLY for some types of trades and naked puts are better for others.
An example of why a naked put is different and better than a covered call - > buying power. Often you can control more shares with a naked put than you can with a covered call as the strike price may be the factor with the broker and premiums may for some brokers not allowed to be used to help pay for the underlying stock.
An example of why a covered call is different and better than a naked put -----> you are buying a dividend paying stock and the dividend is taxed at a different rate for income taxes than short term capital gains for a stock that your holding for less than a year and longer than 60 days (
http://www.irs.gov/publications/p17/ch08.html#en_US_publink1000171584) do your own homework with taxes though and I am not a tax expert by any means.
I know, I know what your thinking about pricing but I can back up the simple pricing as well....
I am guessing that your thinking of what is known as parity between puts and calls. Basically the puts and calls need to be priced relative to each other otherwise there is the ability to arbitrage the difference. I understand and AGREE with you in that concept but a key point is missed when one assumes that parity exists.
The key point is volume of options. Calls on any given stock on any given day generally have greater volume than the puts and the spread as a result is smaller. This difference in volume between calls and puts means that with all else being the same with a stock that is not hugely traded the calls are a better deal more often than the put parity trade. If one doesn't mind paying the spread going into the the trade and exiting it would not matter but that doesn't mean its the same.
While the pricing will be in the same ball park generally it is not always and even when an arbitrage exists doesn't mean it can get done. You still need to have a counter party and that means you need to find a counter party that is less informed than they should/could be.
Its one of those classic cases where the textbook and the real world are not totally the same.
I hope that makes it more clear why puts and calls are often not the same in terms of synthetic parity (there are other smaller reasons but these are the biggest main points)