SK Hynix Inc.’s shares slid 4.7% after its record quarterly profit and modest capex plans failed to impress investors betting on insatiable AI demand for advanced memory chips.Nvidia Corp.’s main supplier of high-bandwidth memory reported a more than 2,000-fold jump in operating profit to 8.08 trillion won ($5.6 billion) in the December quarter on a 75% rise in revenue, in line with analysts’ estimates. The South Korean company also boosted its annual dividend by 25% to 1,500 won a share, and sa...