Tuesday is the first trading day on U.S. stock markets since President Donald Trump escalated his threats over Greenland this weekend. Most Read from Fast Company The president threatened additional tariffs on allied countries that objected to his desired takeover of the Danish territory. The geopolitical uncertainty that has emerged appears to be behind a decline in stock futures, particularly in Big Tech stocks. And that fall has reignited concerns about a revived “Sell America” trade. Here’s what yo ...