S&P 500 Index Futures Trading Lower In Volatile Trading By: Benzinga via Benzinga May 29, 2015 at 10:55 AM EDT Joel Elconin is the co-host of Benzinga's #PreMarket Prep, a daily trading idea radio show. S&P 500 index futures are lower 11 ... Read More >> Related Stocks: Apple Exxon Mobil Pfizer Procter & Gamble SPDR S&P 500 ETF Trust