Headquarters of Samsung in Mountain View, California, on October 28, 2018.Shares of South Korean chip heavyweights Samsung Electronics and SK Hynix surged Thursday, a day after the two companies partnered with artificial-intelligence major OpenAI as part of the U.S. firm's Stargate initiative.Shares of Samsung hit their their highest since January 2021, rising over 4%, while SK Hynix stock surged more than 9% to hit its highest since 2000.OpenAI said in a statement that this partnership will "focus on incre ...