Greenland tariffs spark market jitters as futures slide

U.S. stock futures point to a downbeat session after President Trump threatened escalating tariffs on eight NATO partners to pressure a Greenland deal, with Dow futures about 367 points lower, S&P 500 futures down ~0.8% and Nasdaq futures around 1% lower. European markets also fell on the news, while investors await quarterly results from Netflix, Charles Schwab, Johnson & Johnson and Intel and potential Supreme Court action on tariffs amid ongoing Iran unrest and broader policy uncertainty.