Nvidia has once again climbed to the top of the global corporate ladder, reclaiming its title as the world’s most valuable company, surpassing tech titan Microsoft, which also happens to be one of its major clients. The chipmaker's shares surged 4% to close at $154.31 apiece on June 25. This rally was driven by investor confidence that China’s export restrictions would not derail Nvidia’s dominant position in the artificial intelligence (AI) space.