After-Hours Futures. The S&P futures regular trading hours on CME is between the hours of 8:30 AM and 3:15 PM EST. This means that S&P 500 futures contracts are traded regularly one hour prior to the 9:30 AM EST stock market open. Moreover S&P futures are also traded outside regular hours on the CME's electronic trading system known as GLOBEX2 (or just plain GLOBEX).