Credit Spreads on S&P vs S&P Futures

Are there advantages to putting credit spreads on the S&P Futures vs CBOE S&P?

My experience is that S&P futures options trades are not that efficient. I don't even know if I get a fill until the end of the day. You can't trade it online yet. But maybe it is still advantageous, I don't know.

Any comments?

Thank you,

Torontoman

 

trade the ES options, they are electronic and fills instantaneous. lower margin requirements on naked positions though this chages on April 2nd when portfolio margining comes in.

 

Does the April 2nd change have any effect on ES vertical credit spread margin requirements?

 

I don't think so. I could be wrong...and just21 correct me if I am... but I think what he's trying to say is that the NON ES stuff will be treated like ES after 4/2. Therefore the margins should be that same at that point, but I don't think ES margin will change.