Quote from optioncoach:
I will just throw in my $0.0175 here with respect to 5-point spreads v. 30-point spreads.
I do not think you will get much comparing these two since they are quite different. There are pros and cons to doing each and it is really a matter of personal preference and how each would maesh with your own trading style and capital.
5-point spreads allow you to do big volume for small credits and take in nice premium. The short is really close to the long so if the market starts moving towards you, the long will help offset more initially than if the spread was much wider. Most cases it is hard to get a good credit since the spread is onyl 5 points apart due to the wide b/a spread. in most cases you have a negative bid for the spread or the wide b/a spread puts the midpoint close to $0. However with some time and good entries on swings you can grab one for decent credit and do nice volume. On a large market swing, the spread will reach a greater loss sooner than a much wider spread but depending on how and when you adjust it might not matter as much.
A wider spread means the long option will cost much less than the short one allowing for a greater premium. The margin is of course higher unless you are doing a fixed capital amount no matter the size of the spread. Wider spreads may allow you to go furtgher OTM since you can take in more premium and therefore use further out strikes. On the downside the long strke will be too far away in most cases to offset moves in the index against you. So if the market moves towards you, the short strike has a much greater delta in general and the position will suffer a larger loss in general on PAPER. Again, whether this paper effect matters depends on how you trade them.
But since you could choose different strikes with the narrow and wider spreads and they will react differently to market moves it is hard to compare them and really say which is better. One is better in certain situations than the other but it is really personal preference. One trader who does these in larger scale than me like the really wide spreads to be able to go as far OTM as possible and get a decent credit. I do not have the cheddar to make that profitable for me so I do not mind moving a little higher than him and use 5, 10 and 15 point spreads.
Personal preference really controls here as opposed to an objective easy answer.