US Stock Futures Tumble, China's Shanghai Plunges 8.5% By: Benzinga via Benzinga August 24, 2015 at 07:28 AM EDT Pre-open movers US stock futures traded lower in early pre-market trade. China's Shanghai Composite Index dipped 8.49 percent ... Read More >> Related Stocks: Astrazeneca Plc ADR DaVita HealthCare Partner Netflix Softbank Corp ADR The Ensign Group IN Tuesday Morning Company