S&P 500 Index Futures In Danger Of Rare Back-To-Back Down Days By: Benzinga via Benzinga March 25, 2015 at 11:12 AM EDT em>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: SPDR S&P 500 ETF Trust