Facebook suffers biggest one-day wipeout in U.S. stock market history, Zuckerberg loses over $15 billion

(Reuters) — Facebook Chief Executive Mark Zuckerberg's fortune took a more than $15 billion hit on Thursday, as the social media company suffered the biggest one-day wipeout in U.S. stock market history a day after executives forecast years of lower profit margins. At least 16 brokerages cut their price targets on Facebook after Chief Financial […]