Alphabet 's stock surged more than 5% on Thursday, while Meta shares plunged 10%, as investors digested first-quarter earnings results, which included plans to up the ante on artificial intelligence spending. It is pacing to be Meta's worst day since October 2025 and Alphabet's best day since November 2025. The diverging stock moves show that Wall Street isn't guaranteed to applaud every tech company's AI spending spree . "The market was less united on what to make of the spending plans, with