South Korea's Kospi falls more than 5% in chip selloff

South Korea's Kospi fell more than 5% on Tuesday, after dropping more than 7% at one point, as chipmakers sold off on worries about the AI boom and reports of advances by Chinese memory chipmaker CXMT. Samsung Electronics fell 7.4% and SK Hynix about 10%. Japan's Nikkei 225 also fell. On Monday, Nvidia, AMD, Micron and Broadcom all declined on Wall Street.