SK Hynix earmarked at least $31 billion in capital spending this year after reporting a six-fold surge in quarterly profit. Yet the Korean company’s shares fel

SK Hynix earmarked at least $31 billion in capital spending this year after reporting a six-fold surge in quarterly profit. Yet the Korean company’s shares fell, reflecting both the sky-high expectations surrounding the AI industry’s linchpins and the growing concerns that big tech firms are buildi…