is it possible to trade the spx options with margin the same way as ES options trade ? cause i don't have 100000 to open a portfolio margin account
Not that familiar with ES option margin, but SPX margin without a PM account can be very high. Anytime you are short units or short a time spread, you are going to have high margin. Don't know of anyway around it.
It's not clear what a portfolio account has to do with SPX options? If you want to minimize your outlay you can always trade vertical spreads. A 5 point spread has only a $500 max cost/loss per contract.
I think the OP wishes to increase his leverage beyond Reg-T, which is possible with PM, but allows one to over-leverage. His reference to SPAN margin (via Futures accnt) suggests the increased leverage is what he would like.
No! The PM Margin is computed different from Reg-T (even for a single underlying). I forget the formula (which can vary broker to broker). I do NOT have PM accounts, as I do not want this "feature" (which can bite when the margin is dynamically re-assessed)!
I don't see why PM margin would be calculated differently for a single underlying. The word "Portfolio" in "Portfolio Margin" is there for a reason, it's reducing margin if the portfolio reduces risk compared to the risk of each component of the portfolio alone. If you've got only one option in your "portfolio" you haven't got a "portfolio"! I'm sure Robert knows the answer on this one though, hopefully he'll let us know.
But if your selling one put on spx of you havePM U WONT NEED 125000k u will only need to put 22000 Aprox... get the point ?!