Shares of Meta Platforms plunged 7.5% in Thursday’s trade on October 22, to reach $644.30 apiece as investors worried about the social media giant’s aggressive bet on artificial intelligence (AI), overshadowing better-than-expected September-quarter results. During its quarterly earnings report on Wednesday, the parent company of Facebook and Instagram raised its capital spending plans for the year and announced a new class of non-voting shares that could ultimately be used to help fund acquisitions and other expenses.