Oracle is tumbling after reporting earnings as investors question its aggressive strategy.Oracle (ORCL 4.63%) got pummeled after reporting earnings on Dec. 10.The tech giant reported an impressive 54% increase in non-GAAP earnings per share and record remaining performance obligations (RPO) of $523 billion.The results were excellent, but still weren't enough to overcome investor concerns about Oracle's aggressive spending on artificial intelligence (AI) infrastructure.Here's why Oracle's spending is so extr ...