Quote from schizo:
Maybe you should learn to read. Apparently, he said "usually". In fact, the futures usually do trade in premium to cash.
I read just fine, you are the one that needs to learn how to read.
The sentence "Usually, the futures always trades ahead or higher of the SPX." contains the word "always" along with the word "usually". As stated, this is nonsense.
You must trade different S&P futures than the rest of the trading world as they have been trading at a discount to cash for over 2 years.
The simple premium/discount relationship of index futures to cash is all explained at http://www.indexarb.com/ .
Ignore reality at your own risk.