This copy is for your personal, non-commercial use only. To order presentation-ready copies for distribution to your colleagues, clients or customers visit http://www.djreprints.com. That seemed to be the lesson earlier in the past week when global markets tumbled as trade tensions quickly escalated between the U.S. and China. Yet even after a tit-for-tat on tariffs between the two economic superpowers—and President Donald Trump’s move to restrict Chinese telecom-equipment giant and national champion Huawei Technologies from possibly accessing the U.S. technology and semiconductor chips that it needs to operate—the U.S. stock market proved resilient.