S&P 500 Index Futures Maintaining Gains By: Benzinga via Benzinga July 01, 2015 at 10:44 AM EDT Joel Elconin is the co-host of Benzinga's #PreMarket Prep, a daily trading idea radio show. S&P 500 index futures were trading ... Read More >> Related Stocks: Dow Jones Industrial Average (EOD) Exxon Mobil Microsoft SPDR S&P 500 ETF Trust Wells Fargo