Quote from falconview:
PHIL said he went on MONTHLIES wider spreads in the SPX to increase the premium collected, which sounds like a logical thing to think of. Again, I can only vaguely remember something about MARGIN and dangers of widening the spread legs to several strikes. So had decided to stick with a one strike spread in the weeklies. Now I've forgot what it was? Old age I guess? You just confirmed the thing I was trying to remember and decision made to stick to one strike wide spreads is the right thing to do. Darn! I can't remember why I made that decision? Something in Phil's threads which was talked about.
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For me was easier to manage my margin and position looking at only 5 - 15 point wide spreads at the most. I would go up to 15 points wide for little more margin though the risk increased as much as well. I think doing 20 or 40 point wide strikes could lead one to even more lax risk management. Now this might all be mental but still for me I was in more of a comfort zone doing 5 and 10 point spreads to get in and out, even with the SPX "rape you" wide spreads. I moved some to NDX with wider strkes (fixed at 25 points) but easier to fill in many cases.
Just my advice, start small with narrow strikes even if the difference is just mental.