US stock futures hit by Russia, Ukraine concerns By: CNBC.com News August 06, 2014 at 05:34 AM EDT U.S. stock index futures traded down on Wednesday, as European shares fell sharply on rising concerns about Russia and Ukraine. Read More >> Related Stocks: Amazon.com Apple Chesapeake Energy McDonald's Corp Mondelez International Ralph Lauren Corp Samsung Electronics Ltd Sentinelone Inc Cl A Time Warner Twenty-First Century Fox Verizon Communications Via Renewables Inc Cl A Viacom Walgreen Company Walt Disney