SK Hynix Shares Plunge 12% After Near-9% Jump as AI Mood Swings

South Korean memory chip maker SK Hynix saw its shares collapse 12% on Thursday, a day after they surged nearly 9%. The wild swings reflect rapidly shifting investor sentiment around AI-linked stocks, oscillating between euphoria and fatigue. SK Hynix is a key supplier of HBM memory chips used in Nvidia's AI processors.