Facebook Inc. FB, -0.65% stock rose more than 3% after hours Wednesday following a question-and-answer conference call between reporters and Chief Executive Mark Zuckerberg. Facebook stock closed down less than 1% to $155.10. During the call, Zuckerberg said that the board of directors did not have plans that he knew of to replace him as chairman, and that he still believed he was best person to retain the CEO job. Zuckerberg also fielded a range of questions about the Cambridge Analytica issue over improperly handled data as well as security and privacy topics related to fake news and election tampering. Facebook stock has lost 12% this year, as the benchmark S&P 500 index SPX, +1.16% has fallen 2.2%.