Fraying relations between the U.S. and China go beyond trade. These are the stocks on the battle’s front lines. : 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. https://www.barrons.com/articles/the-cold-war-in-tech-is-real-and-investors-cant-ignore-it-51550883601 Cisco Systems, an early Silicon Valley success story, has become one of the nation’s top tech exporters. Today, roughly half of the networking giant’s sales come from outside the U.S. As foreign countries sought to catch up with U.S. connectivity, Cisco helped plug them in.