S&P 500 Index Futures Lower By: Benzinga via Benzinga February 09, 2016 at 13:47 PM EST S&P 500 index futures are trading lower by 21 points at 1831 in Tuesday's session. Off the open, it immediately found support ... Read More >> Related Stocks: Amazon.com Dow Jones Industrial Average (EOD) Exxon Mobil SPDR S&P 500 ETF Trust