Quote from jeffm:
This is not an apples-apples comparison.
First, selling a near ATM ES option has almost the same margin as holding the futures contract outright. Which makes sense, as your risk is similar between the two positions.
Second, you're comparing an naked option with a spread. That's perfectly fine and valid, but don't call it a follow up on margin requirements. If you want to compare ES and SPX margin, show both of them with a naked option sale, or both of them with a spread. But not naked versus spread.
Third, if you want to collect 3.25 points of premium to compare with the SPX 1260/1250 spread, try selling 2 ES 1210 puts for 3.30. Overnight margin for the 2 naked 1210P is about $4000. For $10k margin to compare with your SPX spread, you would collect $825, versus $325 for the spread. Obviously the risk/reward and %win/loss greatly differs between the two trades. Or compare the ES spread which collects about 2.5 pts, but has a margin for the spread of about $400.
I leave it to the reader to choose their own r/r and %w/l. But at least make sure you are looking at the right numbers to make the comparison.
Jeff,
Do you mean the margin for ES 1260/1250 spread is $400 for each contract? If so, the credit over margin ratio is 2.5*50/400 that is slightly higher than 25%.
It doesn't seem span provides a higher leverage for spread traders.

