U.S. stock futures all moved into positive territory Friday after initially being in the red following China's announcement that it is raising tariffs on U.S. imports to 125% from 84%, the latest escalation in the trade war between the two countries.

Wall Street stock futures opened sharply lower on Sunday suggesting a rough start to the trading week as investors worried that a global trade war could push the U.S. economy into a recession after President Donald Trump's announcement last week of sweeping tariffs against U.

U.S. stock futures opened sharply lower on Sunday evening, with contracts tied to the S&P 500 falling more than 5% during the opening minutes of trade as an ugly stretch for stocks looked set to worsen.