I heard and read the the ES are the "drunken cousin" of the SP (the S&P Big). I don't know if I should interpret this as good or bad. What are the upsides/downsides of trading the E-minis versus the S&P Big (besides the $250 to 1 leverage). newguy. B
Emini has the largest volume. S&P has only ~1/8. I'm not sure, but it seems S&P has a period where only telephone orders are accepted.
You should trade ES. Slippage is greater on the big contract. Also, you get instant execution without having to talk to anyone. The delay in execution over the phone also adds to slippage.