Greenlight Capital Re’s David Einhorn lamented a bum year in his shareholder letter for 2017 with an investing loss of 1.6% net of fees. He also announced the new lineup of stocks he selected during the fourth quarter: Twitter, Ensco and Time Warner. First, Einhorn surprised investors by taking a long position in Twitter. As he acknowledged in the letter, he has been betting that certain stocks in the tech space will fail. These stocks, ...