A Facebook Inc. logo sits on display at Station F, a mega-campus for startups located inside a former freight railway depot, in Paris, France (Photographer: Christophe Morin/Bloomberg)

Facebook’s Shrinking Margins Top List of Woes Weighing on Stock

(Bloomberg) -- Facebook Inc. has contended with data privacy scandals, U.S. lawmaker scrutiny and slowing user growth in 2018. Yet the social network’s shrinking margins are giving investors the mo...