US Stock Futures Tumble Ahead Of Economic Data By: Benzinga via Benzinga September 01, 2015 at 07:34 AM EDT Pre-open movers US stock futures traded lower in early pre-market trade. Data on Motor vehicle sales for August will be released ... Read More >> Related Stocks: Astrazeneca Plc ADR Delta Air Lines Kratos Defns Msa Safety Inc Science Applications International Valeant Pharmaceuticals International, Inc.