Stock futures were pointing to further losses Friday as President Donald Trump’s plan to hike tariffs on some U.S. trading partners put investors in a risk-off mood. The U.S. will raise tariffs on scores of nations, effective just after midnight on Aug. 7, according to an executive order signed by Trump on Thursday. The new effective date will give Customs and Border Protection time to update the Harmonized Tariff Schedule for the higher levies, a senior administration official told reporters.