Quote from trade2retire:
Newbie question:
I can see OTM being cautious in the sense that the short strike is further away.
How is the closer ATM approach also cautious?
I'm going to try to be careful not to start another time wasting ATM/OTM debate here. If you want that, there is plenty on this thread and Optioncoach's thread:
http://www.elitetrader.com/vb/showthread.php?s=&threadid=49586
Here's my view;
FOTM credit spreads (selling cheap gamma) is inherently more risky. You are risking a much larger chunk of money to get a very small reward. Most times your risk:reward is something like 10:1 or worse. Now, the debate is that in terms of true risk you must consider probability of profit. This is exactly right! The probability for FOTM spreads is much higher, but is it proportionately higher? IMO that is a resounding no. The best expectancy is ATM and it just gets worse the further OTM you get.
So that theory leads to the idea of risk management. Sellers of cheap gamma lean heavily on the idea that they can avoid catastrophy by adjusting. The analogy of "picking up dimes in front of a steam roller" is very real. But you have to consider what is happening when you adjust/roll. You are simply closing out the initial position at a loss, and opening a new one. If the underlying moves against you quickly, you'll have a significant paper loss with FOTM. To roll, you are accepting that loss and relying on the idea that within a few of the following months you'll recoup the loss given the high prob trading style.
Now, ATM/CTM credit spreaders must also practice good risk management, but they need not avoid catastrophy. We don't ever have that much potential risk. The damage done by an adverse move is minor, and the ability to recoup losses on a roll compensate for the lower probability of profit.
Example:
Goal = 5% return on account this month on a $10K account.
FOTM:
sell 21 1380/1385 calls for $0.25
Max Risk = $9975
Max Reward = $525
Return = 5.25% (gross)
IOW, you have to risk pretty much your entire account to make your 5%.
CTM
sell 3 1345/1350 calls for $1.70
Max Risk = $990
Max Reward = $510
Return = 5.1% (gross)
IOW, less than 10% of your account is at risk during a big adverse move.
So if there is a big/fast move in the wrong direction, and theta doesn't have time to work, it is likely that you could be sitting on 50% (or larger) loss in your account. If you roll, you'll have to roll closer to the money, because you don't have any dry powder to pay the debit by rolling further OTM. If the roll worked, it would require almost 15 months of 5% gains to recoup the loss. Even if we say that theta worked a bit and you only took a 25% loss, it would still take 6 months to get back to B/E.
OTOH, the CTM position only results in about a 5-7% loss on account. It would take less than two months to recoup losses from even the biggest/fastest move, and you've got plenty of dry powder to roll further OTM if you want.
To be continued........