ToplineChina's top competition regulator on Monday said a preliminary investigation found chipmaker Nvidia was violating the country’s antitrust laws, in an announcement that could further inflame tensions between the U.S. and China at a time when officials from both countries are meeting to discuss a potential trade deal in Madrid. Jensen Huang, CEO of Nvidia, speaks to journalists during a trip to China.dpa/picture alliance via Getty ImagesKey FactsIn a brief announcement, China’s State Administration for ...