https://www.reuters.com/article/us-facebook-results-stock/zuckerberg-loses-more-than-15-billion-in-record-facebook-fall-idUSKBN1KG1TN

Facebook Inc 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.