The E-mini and the standard-sized contracts are based on the same S&P 500 index.
E-mini S&P 500 Index Futures contracts expire at the same time and to the same price as their larger counterpart contracts. For quarterly futures contracts, trading can occur up to 8:30 a.m., Chicago time, on the third Friday of the month.
Calendar spread orders for E-minis of any quantity may be accepted for entry on CME Globex.
Yes. CME Group updated the electronic equity options functionality available on CME Globex to enable trading of standard listed and user-defined spreads (including covered) for E-mini options. Check with your CME Globex access provider to see if they offer this functionality on your trading platform of choice. This functionality is also available through CME EOS Trader.
E-mini FLEX options are not currently available.