Quote from andysmith:
Choad,
Thanks for digging up the data. I think there are two take-aways (for me, anyway):
1) There is a time for credit spreads, and a time when they shouldn't be used. In these lower vol times (vol is in the teens), they work with relatively fewer surprises.
2) 5% on a 1200 SPX is 60 points. I typically try to put 50 to 60 points to the short strike when I put the spread on. Now the 5% months were not 1-day black-swan type changes, the 5% was reached over the course of the month. This means theta decay had time to help the position's p/l, so even if the position had to be exited or rolled, it does not mean the month's p/l was not profitable.
There is one weakness due to this strategy's skewed risk/reward, and it is the black swan, 1-day disaster, totally illiquid market, scenario. I believe the only way to mitigate that risk with this strategy is to limit position size.