What is the difference between the E-Mini S&P500 Cash Future (
ESY00) and the closest expiring contract for the E-Mini S&P500 Future (prensently the
The difference is that the “Cash” future is not a real, tradeable instrument. It is simply just a reflection of the S&P 500 Index, or the “spot” price as in other commodity derivatives, which is also not a tradeable instrument in and of itself. The front month futures contract, right now ESU18, is a tradeable instrument but will not trade exactly at the index price because equity futures take into account interest rates and dividends.
This is a great article on the subject —> https://www.cmegroup.com/education/files/understanding-stock-index-futures.pdf