Oracle (ORCL) stock fell more than 13% Thursday after the tech firm's quarterly AI costs rose ahead of Wall Street's expectations and revenue fell short. Oracle reported capital expenditures of $12 billion for its fiscal second quarter after the bell Wednesday, up from about$4 billion the previous year and the roughly $8 billion projected by analysts tracked by Bloomberg. The AI cloud player also hiked its guidance for full-year capital expenditures to$50 billion from its prior $35 billion estimate. At ...