What would be the margin required for the following position: short 1 ES futures long 1 ES call option with the same expiration date?
I don't have a SPAN margin calculator, but you are not giving enough information to those that do. You need to know the exact option details and the price of the future you are modeling.
This is the best I can do....Have not used this in 2 years. http://www.cmegroup.com/confluence/display/pubspan/Quick+Installation bob
I'm guessing he was trying to see if he could put less money in up to enter a synthetic put than buying the actual put.