Quote from KS96:
What initial/maintenance margin you need for EFPs?
20% for the SSFs, or less? The position is practically risk-free, 20% margin would be too much.
It makes no difference if you are not going to use more than 4 to 1 leverage. So, i think it doesnt affect futures guys. And if u are a stock guy, you should not sell EFP if you are already borrowing money from IB anyway. In conclusion, i think it makes no difference whatever the margin requirement is.
And I think the exchange sets the requirement, which a paricipant has no control over.